What are PCB stencil printers?

December 18th, 2024

What are PCB stencil printers? stencil pcb printers is a process for applying solder paste to specific pad locations on a PCB board with high precision. The core tool is the PCB stencil, a thin sheet of precision-machined metal with holes that exactly match the shape, size, and location of the PCB board pads.

What is a PCB stencil?

A stencil in PCB refers to a tool used in the surface mount assembly process to precisely deposit solder paste at specific locations on a printed circuit board. The stencil is usually made of brass or stainless steel and is engraved with circuit patterns that match the locations of surface mount devices (SMDs) on the PCB.

The stencil plays a vital role in the PCB assembly process. It ensures that solder paste is accurately deposited at the locations of the SMDs, thereby ensuring that the components are accurately mounted in the correct locations.

The design of the stencil, including its composition, thickness, and the shape and size of the holes, will affect the quality of the solder paste deposition. Too much or too little solder paste can lead to welding quality problems, such as ball formation, bridging or tombstoning.

What is a PCB stencil made of?

PCB stencils are mainly made of stainless steel, which has good corrosion resistance and high hardness. This stencil is usually called a SMT Stencil or a solder paste printing stencil, which is mainly used to print solder paste onto PCB circuit boards during SMT assembly.

The stencil is cut by high-precision laser, and has holes or grooves corresponding to the PCB pads, which are used to accurately control the printing of solder paste.

What types of PCB stencils are there?

The types of stencil in PCB stencils mainly include the following:

AI stencil: mainly used in SMT process, can replace dispensing machines, improve production efficiency and reduce costs.

Laser stencil: through high-energy laser cutting to create an opening that perfectly matches the PCB pad, it has the advantages of high precision and smooth edges, and is particularly suitable for high-density and high-demand PCB assembly.

Etched stencil: The opening is formed by chemical etching liquid corroding the steel sheet. The cost is lower, but the accuracy and edge smoothness are not as good as laser cutting.

These stencil types have their own characteristics and are suitable for different PCB manufacturing needs. Laser stencils are particularly suitable for high-density and high-demand PCB assembly due to their high precision and smooth edges; while etched stencils are suitable for applications with low precision requirements due to their low cost and simple manufacturing process.

What is the function of a PCB stencil?

The stencil in the PCB template plays a vital role in the manufacturing process. The stencil is a high-strength metal grid that is mainly used to apply solder paste on the PCB. Its specific functions include:

Accurate quantitative distribution of solder paste: The stencil accurately controls the distribution of solder paste through the holes on it, ensuring that the solder paste is evenly and accurately applied to the predetermined pad position on the PCB, avoiding too much or too little solder paste, thereby ensuring welding quality.

Improve welding quality: By precisely controlling the distribution of solder paste, stencil helps reduce welding defects such as bridging and empty soldering, improves the consistency and reliability of welding, and thus improves the electrical performance of the entire PCB and the overall quality of the product.

Adapt to complex designs: With the trend of miniaturization and high density of electronic products, the components on PCBs are getting smaller and smaller, and the spacing is getting closer and closer. Stencil can be customized according to design requirements to meet the needs of high-end electronic products.

Improve production efficiency: On an automated production line, with the use of precision stencil and automatic solder paste printers, fast and efficient mass production can be achieved, greatly improving production efficiency and reducing the error rate of manual operation.

How to design a PCB stencil?

In the surface mount (SMT) assembly process, solder paste stencil plays a key role. Its ability to accurately apply solder paste is directly related to the quality and reliability of the connection between SMD components and PCB pads. The following are the key points to focus on when designing solder paste stencils:

Matching design files: The design of solder paste stencils must be closely constructed based on the solder paste layer information of the PCB to ensure that every hole and shape on the stencil is precisely matched with the solder paste layer, so as to provide an accurate basis for subsequent solder paste coating and avoid poor welding problems caused by design deviations.

Selection and thickness: There are many types of solder paste stencils, the most common of which are stainless steel stencils and polymer stencils. At the same time, the determination of stencil thickness cannot be ignored. It is usually in the range of tens to hundreds of microns. It needs to be finely adjusted in combination with factors such as pad size, pin spacing, and required solder paste amount to ensure uniformity and stability of solder paste coating.

Hole size and shape: The hole size and shape of the stencil should be perfectly matched with the solder paste area on the solder paste layer, and the solder paste coating range should be strictly controlled to prevent the solder paste from overflowing to the adjacent pads and causing short circuit failures, or insufficient solder paste coating affecting the welding quality, to ensure that the solder paste coating is accurate at every location.

Customized special design: For special components or parts with special pin structures, a special design scheme is required on the solder paste stencil.

How to use a PCB stencil?

The following are the steps to use a PCB stencil:

1. Preparation:

Check whether the PCB stencil opening is blocked or deformed, and whether the PCB board surface is clean.

According to the size of the printer and the stencil, install the stencil through the positioning hole and the printer positioning pin to ensure the correct direction and secure fixation.

2. Solder paste preparation:

Select solder paste according to PCB welding requirements and component type, check the shelf life and quality, take it out and stir it for 3-5 minutes to make it uniform.

3. Solder paste printing:

According to the thickness of the stencil, opening and solder paste characteristics, adjust the parameters such as the printer scraper pressure, printing speed), demolding speed and stroke.

Start the printer, and the scraper moves to fill the stencil opening with solder paste and transfer it to the PCB pad. Observe the printing situation during the process and adjust it in time if there is any problem.

4. Post-printing inspection and cleaning:

Use a magnifying glass or SPI to check the quality of solder paste printing on the PCB board, and reprint the unqualified ones after cleaning.

Use special solvents and tools to clean the template, remove the residual solder paste, and store it properly after drying.

PCB stencil printing is an indispensable key process in the field of electronic manufacturing. As a core tool, the quality and precision of the stencil directly determine the coating effect of the solder paste on the PCB board, which in turn affects the welding quality of electronic components, and ultimately plays a decisive role in the performance, reliability and stability of electronic products.

Tags: PCB stencil, PCB stencil printers, stencil pcb printers
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Mastering circuit teensy diagram maker for easy design

December 17th, 2024

Mastering circuit teensy diagram maker for easy design, circuit diagram maker is a software or online tool. It has a rich electronic component symbol library, allowing users to place components by simple drag and drop operations, and can also use wiring tools to depict the connection relationship between components to make circuit schematics. For PCB circuit diagrams, it can reasonably layout components, set different line widths and spacing, and can also perform electrical and design rule checks, and output files in multiple formats. It is an important tool for circuit diagram production in the field of electronic design.

How do you make a simple circuit diagram?

The following are the steps to make a simple PCB circuit diagram:

1. Circuit design planning:

Clarify the purpose and performance of the PCB, and determine parameters such as power supply voltage, current, and signal frequency.

Select components based on function, and check the data sheet to determine the package, pins, and electrical parameters.

2. Draw a schematic:

Select EDA software (such as Altium Designer, Eagle, KiCad, etc.) or draw it manually with pencil and graph paper (need to be converted to electronic format).

In the software, find symbols from the component library and drag and drop them, or manually draw component symbols according to the standard and mark the names.

Use the software to connect component pins with a wiring tool, and manually use a ruler and pencil to connect. Pay attention to the connection point representation and neat lines.

Mark component parameters, names, packages, and network names or signal names.

3. PCB layout:

Create a new PCB file and import schematic information.

Determine the PCB size and shape according to requirements, such as selecting a 50mm×50mm square.

Drag and drop components from the library into the board frame, divide them according to function, and pay attention to the spacing that is conducive to welding and heat dissipation, such as separating high-power components.

4. PCB wiring:

Set wiring rules according to circuit properties and component parameters, such as power line width 1-2mm, signal line width 0.2-0.5mm, and spacing not less than 0.2mm.

Manual wiring (using software wiring tools to draw lines according to connection relationships and control the direction), automatic wiring (manual adjustment after the software automatically completes) or a combination of the two.

Check whether the wiring is compliant, whether there are short circuits or open circuits, optimize the wiring of key signals, and reduce interference.

5. Design inspection and output files:

Use the software DRC function to check the PCB design and modify the problems according to the prompts.

Generate Gerber files (for PCB manufacturing) and BOM files (list component information). Different software has different generation methods, such as “File”-“Fabrication Outputs” in Altium Designer to generate Gerber, and “Reports”-“Bill of Materials” to generate BOM.

What is a circuit board diagram called?

Circuit board diagrams are usually called PCB diagrams (printed circuit board diagrams). Concepts related to PCB diagrams include schematic diagrams, block diagrams, and assembly diagrams.

PCB diagrams are detailed layout diagrams of circuit boards, which accurately show the location of components on the circuit board and the routing of the circuit. Through the PCB diagram, you can clearly understand the location of circuit components on the PCB, the connection method, and the circuit direction, thereby ensuring the correctness and reliability of the circuit.

PCB diagrams play a vital role in the manufacturing and assembly process of electronic equipment. It guides the layout and connection of electronic components to ensure that the physical construction and assembly of the circuit are correct. The unnecessary copper foil is removed chemically or mechanically to form the path of the circuit, and then the electronic components are installed on the circuit board to form a complete circuit.

Which software is used for PCB designing?

Commonly used software for designing PCBs include Altium Designer, Cadence Allegro and Mentor Graphics PADS PCB.

1. Altium Designer

Altium Designer is a world-renowned PCB design software that supports the entire process from schematic design to PCB layout. It has a wealth of library components, powerful automatic routing functions and a variety of export functions, which can help designers complete the design quickly and efficiently.

2. Cadence Allegro

Cadence Allegro is a commercial EDA software with very rich functions. It provides control over the components and PCB software used in electronic systems to ensure the smooth implementation of the project. Allegro has a number of technologies such as three-dimensional electronic design and simulation, printed circuit board design, hardware description language, etc., which can control the workflow more finely.

3. Mentor Graphics PADS PCB

PADS PCB is a PCB design software developed by Mentor Graphics, which is widely used in communications, automobiles, medical and other fields. It provides a clear and intuitive user interface and powerful library component management functions, making the PCB design process simpler and more convenient. PADS PCB supports fully automatic routing and signal integrity analysis, effectively improving design quality and efficiency.

How do you draw a PCB layout?

1. Preparation

Complete the schematic design and check the component connections and parameters.

Be familiar with the component package and check the appearance, pin distribution and other information.

Determine the PCB size and shape according to the application scenario and installation requirements.

2. Layout principles

Place components according to functional partitions for easy debugging and maintenance.

Arrange components according to signal flow to avoid line bending and crossing.

Ensure component spacing and consider installation requirements.

3. Start layout

Import the schematic information into the PCB design software.

Place components manually and arrange them neatly using software tools.

Adjust component positions, considering signals, routing and electromagnetic interference.

4. Check and optimize the layout

Check whether it complies with the layout principles and design rules.

Optimize the layout to facilitate wiring, considering multi-layer PCBs and high-frequency signals.

What does j mean on a circuit board?

The “J” on the circuit board usually stands for a socket (Connector). In circuit board design, the letter “J” is often used to represent various types of connectors or sockets for connecting different circuit boards or external devices. In addition, “J” sometimes also stands for a jumper (Jumper), which is used to temporarily connect two nodes.

What is k in a circuit diagram?

The letter “K” in a circuit diagram usually represents components such as relays and contactors. In a circuit diagram, the letter “K” can represent a variety of electrical components, including relays (KA), contactors (KM), time relays (KT), frequency relays (KF), pressure relays (KP), signal relays (KS), grounding relays (KE), etc. In addition, “K” can also represent emergency stop switches (KS).

These components play different roles in the circuit:

Relay: used to automatically control the on and off of the circuit.

Contactor: used to frequently connect and disconnect high-current circuits.

Time relay: used to connect or disconnect circuits after a specific time.

Frequency relay: used to detect and control frequency signals.

Pressure relay: used to detect and control pressure signals.

Signal relay: used to transmit and control signals.

Grounding relay: used for grounding protection.

These components play an important role in circuit design and maintenance. Understanding their symbols and functions helps to better understand and maintain circuit systems.

What is the difference between a schematic diagram and a circuit diagram?

The main difference between a schematic diagram and a circuit diagram is that they focus on different focuses and usage scenarios.

1. Definition and function

Schematic diagram: A schematic diagram is a graphical representation that is mainly used to represent the logical and functional relationship between components in an electronic device or system. It uses symbols and connecting lines to represent electronic components and signal transmission paths, without involving specific physical layouts and sizes.

Circuit diagram: Circuit diagrams focus more on electrical connections and physical layouts, and are used to show the physical connections and relative positions between components in an electronic device or system. Circuit diagrams use symbols and connecting lines to represent electrical connections, emphasizing electrical connections and physical layout rather than just signal transmission.

2. Usage scenarios

Schematic diagrams: Mainly used in the design and analysis stages of electronic systems. Designers use schematic diagrams to describe the logic and functions of electronic devices or systems for analysis and optimization during the design stage.

Circuit diagrams: Mainly used in the manufacturing, maintenance and testing stages of electronic systems. Technicians use circuit diagrams to plan physical layouts and electrical connections, and visualize the structure and function of circuits before actually assembling and installing electronic devices.

3. Specific application examples

Schematic diagrams: In the design stage, designers use schematic diagrams to describe the overall architecture and workflow of the system to ensure that the logical relationship between the components is correct.

Circuit diagrams: In the manufacturing, maintenance and testing stages, technicians use circuit diagrams for actual circuit connections and troubleshooting.

In general, circuit teensy diagram maker is an indispensable key tool in the field of modern electronic design. Through efficient design processes, precise component layout and wiring functions, and strict rule checking mechanisms, they provide solid technical support for the research and development, manufacturing and innovation of electronic products, making complex circuit design work more efficient, accurate and reliable.

Tags: circuit teensy diagram maker, PCB, schematic diagram
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How are the circuit boards connected?

December 17th, 2024

How are the circuit boards connected? Soldering is the most common and long-standing way to connect circuit boards. For traditional circuit boards, we usually use electric soldering irons to perform soldering operations. First, the metal part of the electronic component pins or wires to be connected is tightly fitted with the corresponding pads on the circuit board. Then, the pads and pins are heated with an electric soldering iron, and the solder wire is brought close together to melt the solder and evenly wrap the connection parts to form a stable metal connection.

A circuit board 6 connections typically refers to a design that incorporates six distinct points or pads for electrical connections, which could be input/output ports, signal pathways, or power connections. These boards are often used in simple applications where a limited number of connections are needed to interface with other components or systems.

What are the connections between circuit boards?

The main ways to connect circuit boards include the following:

Welding connection: This is one of the most commonly used connection methods, which connects components on the circuit board together by welding. The advantages of welding connection are stable and reliable connection, low cost, and suitable for circuit boards that do not require regular changes.

Plug-in connection: Plug-in connection can achieve fast plug-in and pull-out, easy replacement and maintenance, but requires high precision of plug-ins and sockets, and occupies a large space, which is not suitable for circuit boards with limited space.

Connector connection: This is a widely used circuit board connection method that can connect circuit boards of different forms and sizes. The advantages of connectors are convenient and fast connection, high reliability, and a large number of plug-in and unplug times, which are suitable for various circuit board application scenarios.

Plug-in connection: widely used in complex instruments and equipment, and connected through standard pins or sockets. This method is easy to replace and repair, ensuring the reliability and production efficiency of the connection.

Special connection methods: including V-cut and copper foil bridge connection, spring connection and spring connection, panel connection, etc. These methods are suitable for specific scenarios and needs, such as V-cut for the separation stage of PCB boards, spring connection and spring connection for the connection of flexible circuit boards, and panel connection for multiple PCB designs placed on a large substrate.

How to connect components on PCB?

There are usually the following ways to connect components on PCB:

Soldering: This is the most common connection method. By connecting the pins of the components to the pads on the PCB with solder, you can use a soldering iron or SMT equipment for soldering.

Spring contact: For some components that need to be replaced frequently, such as batteries, you can use spring contact to make the components easy to disassemble.

Screw fixing: For components that need to withstand large forces, such as heat sinks, motors, etc., screw fixing can be used. Pay attention to choosing the right screws and tightening strength.

Clamping with pliers: For some components that need to be fine-tuned, such as rheostats, potentiometers, etc., pliers can be used to clamp.

Plastic bayonet: For some components that need to be frequently plugged and unplugged, such as wire connectors, plastic bayonet can be used for connection.

How to connect PCB boards together?

To connect PCB boards together, you can consider the following common methods:

Welding:

PCB wire welding: This is a simple and commonly used method to achieve connection by directly welding the wire to the pad of the PCB board. When welding, you need to pay attention to the quality and stability of the welding to ensure the reliability of the connection.

PCB cable welding: It is suitable for situations where multiple wires need to be connected. You can use cable to connect multiple PCB boards together, and then fix the connection between the cable and the PCB board by welding.

Direct welding between PCBs: This method is often used for connections between two PCB boards at a 90-degree angle. When welding, attention should be paid to the alignment and fixation between the two PCB boards to ensure the quality of welding.

Plug-in connection:

Printed circuit board socket: This connection method is often used in more complex instruments and equipment. A printed plug is made from the edge of the PCB board. The plug part is designed according to the size of the socket, the number of contacts, the distance between contacts, the position of the positioning holes, etc., so that it matches the dedicated PCB printed circuit board socket.

Standard pin connection: This method is suitable for use in small instruments. Two PCB boards are connected by standard pins. The two PCB boards are generally parallel or vertical.

Crimping: The PCB board is crimped with other components through a special crimping tool to achieve connection. This method is suitable for situations where frequent disassembly and replacement are required.

Bonding: Use glue or adhesive to bond the PCB board with other components. This method is suitable for situations where the connection strength requirement is not high.

Use connectors: Connectors are a component specially used to connect PCB boards, which can provide reliable connection and convenient disassembly. There are many types of connectors, and you can choose the right connector according to specific needs.

Screw fixing: For some larger or heavier PCB boards, screws can be used to fix them to other components to ensure the stability of the connection.

What are the different types of PCB connectors?

The main types of PCB connectors include the following categories:

Ordinary board-to-board connector: used to connect two parallel or vertical PCBs, suitable for signal transmission between different circuit boards. According to different spacing, it can be divided into 0.50mm, 0.60mm, 0.80mm and other specifications. The smaller the spacing, the more pins can be accommodated, and the signal transmission is more intensive, but the processing accuracy and installation requirements are higher.

Mezzanine connector: mainly used to connect two PCBs with close spacing when space is limited. It is usually connected in a stacked manner to save space and is often used in the connection structure of the motherboard-daughterboard.

Backplane connector: a group of electrical connectors parallel to each other, each pin of each connector is connected to the same relative pin of all other connectors to form a connector bus.

Spring-type board-to-board connector: contains a spring structure inside, which can ensure a stable connection even when the spacing between the boards fluctuates. It is suitable for devices with high requirements for connection stability.

Wire-to-board connector: used to connect wires or cables to PCBs. The wire connection part is similar to the wire-to-wire connector, while the circuit board connection part is mostly a two-piece connector that is press-fit or welded.

Wire-to-wire connector: used to connect two wires. One end of the connector is permanently connected to the wire, and the other end forms a detachable interface. Permanent connection methods can use crimping or insulation displacement contacts (IDC), etc.

How to choose PCB connectors?

There are several key factors to consider when choosing PCB connectors:

Connector type: choose the appropriate connector type according to application requirements.

Size: The size of the connector needs to adapt to the size and layout of the circuit board to ensure that the connector can be properly installed and connected.

Electrical performance: consider the rated voltage, rated current, and withstand voltage of the connector to ensure that it can withstand the electrical load required by the device.

Mechanical performance: includes the number of plug-in and unplugging times, durability, and shock resistance. If the device needs to frequently plug and unplug the connector, a durable and long-life connector should be selected; if the device will be subject to vibration or shock, a connector with good shock resistance should be selected.

Environmental conditions: Environmental conditions have a great impact on the choice of connectors.

Technical parameters: Understand the technical requirements of the application, including pin spacing, soldering method, rated voltage, rated current, number of plug-in and unplug times, temperature range, board spacing, connector geometry, and solder hole diameter of the solder tab.

How do you connect wire to a circuit board?

Soldering is usually used to connect wires to circuit boards. Solder the ends of the wires to the pads on the circuit board using a soldering iron and solder.

Prepare tools and materials: soldering iron, solder wire, flux, wires, and circuit boards.

Clean wires and circuit boards: Use alcohol or other cleaning agents to clean the wires and pads on the circuit board to ensure a good solder connection.

Strip the wire: Use wire strippers or scissors to strip a section of the wire end to expose the metal wire inside.

Tin the wire: Place the end of the wire on the soldering iron tip and wrap it with solder wire at the same time to evenly coat the end of the wire with a layer of solder.

Solder wires to circuit boards: Place the tinned wire ends on the pads on the circuit board, and use a soldering iron to melt the solder to connect the wires to the pads.

Check welding quality: Check whether the solder joints are firm and whether there are problems such as cold solder joints or short circuits.

Clean the soldering area: Use alcohol or other detergents to clean the soldering area to remove excess solder and flux.

Circuit board connection is a technology that requires both theoretical knowledge and practical experience. From basic soldering and plug-in connections to various unique ways of PCB connection, each connection method has its applicable scenarios and key points. Regardless of the connection method, preparation before connection, detailed control during the connection process, and detection and debugging after connection are all crucial.

Tags: circuit board 6 connections, circuit boards connected, PCBA
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What is solder paste inspection?

December 16th, 2024

What is solder paste inspection? In simple terms, solder paste inspection is the process of inspecting and evaluating the quality, volume, shape, position and other parameters of solder paste printed on PCB. As the key material for connecting electronic components to PCB, the quality of solder paste printing directly determines the quality of soldering, which in turn affects the electrical and mechanical properties of PCBA.

How does solder paste inspection work?

The working principle of SPI solder paste inspection equipment is mainly based on optical principles and laser triangulation technology. The equipment irradiates the soldering surface through a camera and a light source to obtain an image of the solder paste, and then detects and analyzes the shape, size, position, etc. of the solder paste through image processing technology to determine the quality of the solder paste and the welding effect.

Specifically, when the solder paste is scanned by a laser, the laser emits a laser, which is reflected and focused by the lens to irradiate the laser onto the solder paste. Due to the reflection of the solder paste, a part of the laser is reflected back and captured by the camera. By calculating the time difference between laser emission and reception, parameters such as the height and area of the solder paste can be determined.

Specific steps and principles of SPI solder paste detection

Image acquisition: Use a high-definition camera and light source to take pictures of the solder paste on the pad on the PCB surface to collect images.

Image processing: Analyze and calculate the shape, size, position and other parameters of the solder paste through image processing algorithms, and compare them with previous standard data.

Defect detection: Through comparative analysis, it is determined whether the printing has defects, such as solder paste offset, unevenness, less tin or more tin, etc.

Advantages of SPI solder paste detection

Reduce the unqualified rate: The introduction of SPI can effectively reduce the unqualified rate of the original finished PCB by more than 85%, and significantly reduce the cost of rework and scrap by more than 90%.

Improve the pass rate: Used in conjunction with AOI, through real-time feedback and optimization of the SMT patch proofing production line, the production quality can be more stable, and the unstable trial production stage that must be experienced when introducing new products can be greatly shortened.

Make up for the shortcomings of traditional inspection: 3D inspection effectively makes up for the shortcomings of traditional inspection methods, especially for the inspection of micro components.

Reduce bad situations: Through process control, minimize the bad situations of components after the furnace.

Ensure printing quality: It can effectively ensure good solder paste printing quality and greatly reduce the possible defective rate of finished products.

What does solder paste inspection do?

Solder paste inspection has the following main functions:

Ensure welding quality: The amount and shape of solder paste directly affect the welding effect. Through inspection, it can ensure that the amount of solder paste is moderate, avoid short circuits caused by too much solder paste, or problems such as cold soldering and open circuits caused by too little solder paste, thereby improving the reliability of solder joints and the electrical performance of products.

Optimize the production process: Solder paste inspection can promptly detect problems in the solder paste printing process, such as printing position offset, tinning, etc. This helps to adjust and calibrate the printing equipment, make the printing process more accurate and stable, and improve production efficiency.

Ensure product consistency: When mass-producing electronic products, solder paste inspection can ensure that the solder paste state on each circuit board is relatively consistent. This can keep the product’s soldering quality at a stable level, reduce product quality fluctuations, and improve the overall quality and consistency of the product.

How to measure solder paste height?

In SMT (surface mount technology), there are several main methods for measuring solder paste height:

Laser scanning method: Using the principle of laser triangulation, the laser beam scans the solder paste surface and calculates the solder paste height by the angle change of the reflected light.

Microscope method: By adjusting the focal length of the microscope, the focal plane coincides with the solder paste surface, and the height information at this time is measured using the optical system.

Mechanical contact measurement method: Use a measuring instrument with a high-precision probe to contact the solder paste surface through the probe, and convert the displacement into an electrical signal to determine the solder paste height.

What does AOI mean in inspection?

AOI is automatic optical inspection, which uses cameras and optical components to obtain images of the PCB of the object being inspected, and then analyzes these images through image processing algorithms. These algorithms compare the actual image with the pre-set standard image or rules to identify various features on the surface of the object, such as the position, shape, size of the component, and whether the quality of the solder joint meets the requirements.

Principle and process of AOI detection

Image acquisition: The AOI detection system collects image data on the surface of the product through a camera or sensor, including various details, components and connecting parts.

Image processing: The received image data is processed by an image processing algorithm to remove interference, enhance image quality, and extract key information for subsequent analysis.

Defect identification: Using pre-set models and rules, key features in the image are compared and analyzed to identify defects, misalignment or missing problems on the surface of the product.

Alarm and classification: Once an abnormality is found, the AOI system will trigger an alarm mechanism and classify the defect type for subsequent processing and repair.

AOI detection systems are widely used in electronic manufacturing, printing industry and other fields. In electronic assembly production lines, it is used to detect PCB boards, solder joints, component positions, etc. to ensure product quality and reliability.

What is the difference between AOI and SPI?

AOI (Automated Optical Inspection) and SPI (Solder Paste Inspection) have the following main differences in SMT (Surface Mount Technology) processing:

1. Different inspection objects:

AOI mainly inspects components and solder joints during SMT processing, and detects common errors such as component misalignment, reversal, missing, and redundant, as well as defects after soldering such as cold soldering and bridging.

SPI focuses on the quality assessment of solder paste printing. By measuring the volume, area, height and other parameters of solder paste, it evaluates the printing quality of solder paste and ensures the correct printing of solder paste.

2. Different inspection principles:

AOI uses optical principles to analyze images on circuit boards and identifies defects through image processing algorithms. It uses a high-resolution camera to capture images of PCBAs and compares them with preset standard templates.

SPI evaluates the printing quality of solder paste by measuring various parameters of solder paste, and uses 3D imaging technology to capture the three-dimensional shape of solder paste and compares it with standard data.

3. Different detection timing:

AOI usually performs detection after component placement and welding. It can detect multiple welding points at one time after welding. The detection speed is fast and the impact on production efficiency is relatively small.

SPI performs detection immediately after solder paste printing. Since it needs to be detected immediately after solder paste printing, it has a greater impact on production efficiency.

4. Application scenarios and advantages:

AOI is suitable for high-demand SMT processing production lines. It can quickly and accurately detect a variety of defects and ensure the quality stability of circuit boards.

SPI is crucial to ensure the quality of solder paste printing, directly affects the subsequent placement and welding effects of components, and is suitable for production lines that require high-precision solder paste printing.

What are the defects of SPI?

The defects of 3D SPI (Surface Inspection) mainly include the following aspects:

Low laser resolution: The laser resolution of 3D SPI is generally at the level of 10-20um, which may not be ideal for precise circuit board detection.

Repeatability accuracy is affected: Since each sampling can only provide information of one point, the repeatability accuracy of 3D SPI may be affected.

Sensitive to external vibration: External vibration has a great impact on the detection effect of 3D SPI, and additional stabilization measures may be required to ensure the accuracy of the detection.

Light conditions: The equipment relies on the principle of optical imaging for detection, so it has high requirements for the light conditions of the detection environment and needs to work under stable and uniform lighting conditions to ensure image quality and detection accuracy.

Relatively slow speed: Compared with some other detection technologies, 3D SPI may be slower.

How long can solder paste sit before reflow?

Before the reflow process, the solder paste needs to stay for a period of time to adapt to the environment and ensure the reliability and quality of the solder joints. The optimal dwell time is affected by various factors, such as the freshness of the solder paste, recycled solder paste, ambient temperature and humidity.

The length of the dwell time directly affects the viscosity and fluidity of the solder paste, thereby determining the solder joint morphology and reliability. If the dwell time is too short, there may be gaps and cracks in the solder joint, which affects its reliability. If the dwell time is too long, the surface tension of the solder joint will increase, resulting in irregular morphology on the solder joint surface, which affects the power-on performance of the circuit.

In general, the best dwell time is between 4 and 8 hours. It should be noted that too long or too short a dwell time will affect the solder joint morphology and reliability. Therefore, in specific applications, it is necessary to select the best solder paste dwell time according to actual conditions.

In short, solder paste detection, as a key link in PCBA production, plays a vital role in ensuring the quality and performance of electronic products. Its detection methods cover visual inspection, 2D detection, and advanced 3D detection, each with its own advantages and disadvantages and applicable scenarios, and is a key line of defense to ensure the quality and performance of electronic products.

Tags: PCB, SMT, solder paste inspection
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What does pwb meaning?

December 16th, 2024

What does pwb meaning? PWB is the abbreviation of Printed Wiring Board. It originated from the need for electronic component connection carriers in the early development of electronic technology. Early electronic devices were relatively simple, and the electrical connection between electronic components was mainly achieved by printing metal circuits on insulating substrates. These circuits are like precise “roads” that guide the current to be transmitted between components, so that electronic devices can work properly.

What does the term PWB mean?

PWB refers to Printed Wiring Board, which is a carrier that uses conductors on an insulating substrate to form interconnected circuits between devices. PWB is an important component of electronic equipment and is used to achieve electrical connections between electronic components.

In the field of electronic manufacturing, PCB (Printed Circuit Board) and PWB (Printed Wiring Board) have a close connection and a specific historical evolution. Today, in most parts of the world, PCB and PWB actually refer to the same item, but the term PCB is more commonly used. They are all circuit boards made by laminating one or more layers of copper foil onto a non-conductive plastic panel. Their main function is to provide support and connection for components with conductive tracks.

However, in some countries such as Japan, since PCB happens to be the name of a common poison, polychlorinated biphenyls, in order to avoid confusion, people prefer to use PWB to refer to this circuit board.

Looking back at the development of the electronics manufacturing industry, PWB has been used in the early days of the industry. At that time, the circuit connection method was relatively simple, mainly in the form of point-to-point connection. With the continuous advancement of technology, wires began to cross from one side of the board to the other, and even from one layer to another. The design of circuit boards is no longer limited to simple point-to-point connections, but has been given specific functions to meet the needs of increasingly complex electronic equipment.

In this process, PCB gradually emerged and eventually replaced the traditional point-to-point wiring board. In 1999, the IPC committee made a decision to clarify the unified use of the term PCB in the future, thus establishing the dominant position of PCB in industry specifications.

In the context of modern electronic manufacturing in most parts of the world, PWB can be regarded as the old name of PCB, while PCB has become a common and standard name for bare circuit boards without components. The unification of this term helps the global electronic manufacturing industry to standardize and normalize in terms of technical exchanges, production and manufacturing, and market circulation.

What is a PCB?

PCB, or printed circuit board, is an indispensable and important component in electronic equipment, used to achieve electrical connections between electronic components. It forms electrical connections between electronic components and supports and fixes components by laying conductive copper foil patterned on insulating materials.

PCB mainly consists of the following parts:

Substrate: Usually made of glass fiber or epoxy resin, providing mechanical support and insulation functions.

Conductive layer: Made of copper foil, responsible for transmitting current and signals.

Solder mask: Protects the copper foil of the circuit board from oxidation and prevents short circuits.

Character layer: Marks the position of components on the circuit board for easy assembly and maintenance.

According to the number of conductive layers, PCBs can be divided into the following categories:

Single-sided board: Only one side is a conductive layer, suitable for low-complexity circuits, such as simple home appliances or electronic toys.

Double-sided board: Both sides have conductive layers, suitable for more complex circuits, such as computers, automotive electronics, etc.

Multilayer board: There are four or more conductive layers, connected by internal wires, suitable for highly integrated circuits, such as communication equipment, high-end servers, etc.

What is the difference between PWB and PCB?

PWB (Printed Wiring Board), PCB (Printed Circuit Board), the difference between them is mainly reflected in the following aspects:

1. Origin of the name and emphasis on the meaning

PWB: In the early days, it mainly emphasized the printing of circuits, focusing on forming conductive circuits on the substrate through printing technology to achieve electrical connections between electronic components, and focusing more on the layout and construction of circuits.

PCB: It emphasizes the concept of circuits more, not only including conductive circuits, but also covering various electrical characteristics, signal transmission paths, and circuit function realization in circuit design. It is a more comprehensive term, involving the entire scope from circuit principles to actual physical layout.

2. Historical development context

PWB: It was widely used in the early stages of the development of the electronic manufacturing industry. At that time, electronic equipment was relatively simple, and the circuit was mainly a relatively simple point-to-point connection method. PWB could meet the basic line connection needs and provided a basic support platform for the assembly of early electronic products.

PCB: With the rapid development of electronic technology, the functions of electronic products have become more and more complex. PCB has gradually developed. It is not just a simple line connection, but also incorporates more circuit design concepts and technologies, thus gradually occupying a dominant position in the industry and largely replacing the early PWB.

3. Application scope and industry habits

PWB: Although it is no longer dominant in modern electronic manufacturing, the term PWB may still be used in some specific fields or traditional electronic equipment manufacturing, especially in some cost-sensitive, relatively simple circuit functions and low requirements for the application of new technologies. Some companies or engineers may continue to use the name PWB.

PCB: Currently widely used in the manufacture of various electronic equipment worldwide, PCB has become an indispensable basic component in the electronic manufacturing industry and a common standard term in the industry, which helps to improve the communication efficiency and standardization of the industry.

4. Technical standards and specifications

PWB: Due to its early application background and relatively simple technical characteristics, the relevant technical standards and specifications are relatively basic and simple, mainly focusing on basic circuit printing quality, line width and line spacing, and conduction performance. With the gradual reduction of PWB usage scenarios, the update and development of its technical standards are also relatively slow.

PCB: With the continuous advancement of technology and the continuous expansion of application fields, the technical standards and specifications of PCB have become extremely rich and strict. These standards and specifications are formulated and updated by international organizations (such as IPC – International Electronics Industry Connecting Association) and industry associations in various countries to ensure that the quality and performance of PCB can meet the needs of electronic products in different industries and different application scenarios.

Although there may be no essential difference between modern PWB and PCB in actual physical products, they have the above-mentioned differences and characteristics from multiple dimensions such as the origin of the term, historical development, scope of application, industry habits, and technical standards. In today’s electronic manufacturing industry, PCB is a more commonly used and widely recognized term, representing advanced electronic circuit manufacturing technology and complex circuit design concepts.

What are the common circuit board terms?

PB is the standardized name for bare board, which stands for printed board; PCBA is the abbreviation for printed circuit board assembly. When the PCB is assembled, it is called PCBA or PCB assembly. PCBA has been the term for all assembled circuit boards since the change in 1999. From users to technical committees, PCBA is also the preferred term for assembled boards.

PWA is the abbreviation for printed wiring assembly. It is an old term for PCB assembly or PCBA.

CCA is the abbreviation for circuit card assembly. CCA is the same as PCBA, but CCA is a less used term.

PCA is the abbreviation for printed circuit assembly. PCA is also the same as PCBA and is not common now.

From this we can conclude that PWB, PCB, circuit board are the same thing, referring to bare printed circuit boards; while PCA, CCA, PWA, PCBA are the same thing, referring to assembled circuit boards. Among them, PCB and PCBA are the two most widely used terms.

In short, although PWB, as a printed circuit board, has some subtle differences in terminology from PCB, in essence they are both indispensable basic components in electronic devices. They have witnessed the development of electronic technology together and will continue to play an important role in the future technological wave.

Tags: PCB, PCBA, pwb, pwb meaning
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What is heavy copper pcbs?

December 13th, 2024

What is heavy copper pcbs? That is, the copper foil thickness is greater than the conventional standard PCB. Generally speaking, when the copper foil thickness reaches 3 ounces per square foot (oz/ft²) and above, it can be called a heavy copper PCB.

The manufacturing process of heavy copper PCBs is more complicated than that of ordinary PCBs, requiring higher technical levels and professional equipment. Compared with ordinary PCBs, its characteristics are high current carrying, good heat dissipation, high mechanical strength and strong reliability. It is suitable for high-power electronic equipment, harsh working environments and fields with high reliability requirements.

What is high copper thickness PCB?

High copper thickness PCB refers to a printed circuit board that uses thicker copper foil as the conductive material. In the standard PCB manufacturing process, the thickness of the copper foil is usually determined according to the application requirements, but when the thickness of the copper foil is greater than or equal to 3 ounces, this PCB is called a high copper thickness PCB.

Usually compatible with FR-4 dielectric, mainly used for inner layers rather than outer layers, plated through holes (PTH) usually need to be plugged/filled, and careful registration and lamination are required

Common heavy copper PCB thickness:

2 oz (70 microns)
3 oz (105 microns)
4 oz (140 microns)
6 oz (210 microns)
8 oz (280 microns)
10 oz (350 microns)

Application areas of heavy copper PCB:

Automotive electronics: widely used in key electronic devices such as automotive control modules, engine control systems, airbags, etc., because they can withstand high temperature, low temperature, corrosion and other environmental factors.

Power circuit: widely used in power modules, DC-DC converters and high power distribution boards, etc., capable of handling high current and high power requirements.

Industrial control system: used in high power motor drives, automation equipment and large mechanical control to meet the needs of high conductivity and mechanical strength.

Renewable energy systems: used in solar and wind energy systems to ensure stable system operation and reduce failure rates.

What are the advantages of heavy copper PCBs?

High conductivity: High copper PCB uses heavy copper foil as the conductive layer. Compared with ordinary PCB, its conductivity is significantly improved, which can carry larger current, reduce resistance loss and improve circuit efficiency.

High mechanical strength: Due to the increase in the thickness of copper foil, the mechanical strength of high copper PCB is also improved accordingly, which can withstand greater mechanical stress and impact, and is not easy to deform or damage.

Good heat dissipation performance: High copper PCB can quickly transfer heat from the circuit to the surrounding environment, effectively prevent components from overheating and damage, and improve the reliability and service life of the equipment.

What type of copper is PCB?

There are mainly the following types of copper on PCB: red copper, copper clad plate and inner layer copper.

Red copper: Red copper is the earliest material used in circuit boards, and is widely used due to its good processing performance and conductivity. The main component of red copper is copper, and the other components are less, but the disadvantage is that it is easily oxidized and corroded.

Copper clad laminate: Copper clad laminate is a layer of copper foil on an inorganic substrate, usually used for double-sided and multi-layer circuit boards. The copper foil ensures the conductivity and connectivity of the circuit board, while the inorganic substrate provides mechanical strength and heat resistance.

Inner copper: Inner copper is used in multi-layer circuit boards, which are made of multiple layers of inorganic substrate and copper foil. It is usually used in high-density or high-speed design circuit boards, with better signal transmission performance and higher mechanical strength, but the manufacturing cost is higher.

In addition, there are different types of copper foil in PCB, including electrodeposited copper and rolled copper. Electrodeposited copper has a vertical grain structure and a rougher surface, which is suitable for rigid PCB boards; while rolled copper has a horizontal grain structure and a smoother surface, which is suitable for flexible and high-speed circuit boards.

How thick is 2 oz copper on PCB?

The thickness of 2 oz copper is about 70 microns. In PCB design, copper thickness is usually expressed in ounces (oz), and the thickness of 1 ounce of copper is about 35 microns, so the thickness of 2 ounces of copper is about 70 microns.

The copper thickness standard of PCB board is usually expressed in oz/ft² (ounces/square foot) or um (micrometer). The copper thickness of PCB board has an important impact on the performance and stability of the circuit board. The outer copper thickness mainly affects the stability of signal transmission and the ability to resist electromagnetic interference, while the inner copper thickness affects the signal transmission rate and signal-to-noise ratio.

Generally speaking, the thicker the outer copper thickness, the stronger the stability and signal strength of the circuit board, which is suitable for high-frequency and high-speed occasions; while the thinner the inner copper thickness, the more suitable for high-speed transmission signals, and the thicker the inner copper thickness, the more suitable for low-speed transmission signals and high signal-to-noise ratio signals.

Why use heavy copper PCB?

The main reasons for using heavy copper PCB include the following aspects:

Enhanced current carrying capacity: Heavy copper PCB uses a thicker copper layer, which can carry a larger current and reduce resistance and voltage drop. This is especially important for high-power applications or circuits that require high current transmission.

Optimize heat dissipation performance: Copper has good thermal conductivity, and a thicker copper layer can more effectively conduct heat away from hot spots and improve heat dissipation efficiency.

Improve signal transmission efficiency: Thicker copper layers can reduce losses and reflections during signal transmission and improve signal integrity.

Enhance mechanical strength: Thicker copper layers can increase the overall structural strength of PCBs, making them more resistant to physical shock and deformation.

Adapt to complex process requirements: Heavy copper PCBs can meet complex circuit design requirements through special process treatments, such as etching, drilling, gold plating, etc., to ensure the accuracy and reliability of circuit boards during manufacturing.

What is the most common copper thickness for PCB?

The most common PCB copper foil thickness is 35 microns. This thickness of copper foil is suitable for most consumer electronics products, can meet daily current and heat requirements, and has a relatively low cost and is suitable for large-scale production.

How are heavy copper PCBs made?

In the initial stage of making heavy copper PCBs, relatively heavy copper foil materials are selected. These copper foils are usually produced by electrolytic copper. During the electrolysis process, copper foils of different thicknesses can be produced by controlling the conditions of electrolysis, such as current density, electrolyte composition, and electrolysis time.

For situations where thicker copper foil is required, multiple lamination methods are used. Multiple layers of copper foil and insulating substrate materials are laminated according to design requirements, and then the copper foil and substrate are tightly combined through a high-temperature, high-pressure lamination process.

Next, the circuit pattern is manufactured on the outer layer of the heavy copper PCB, usually using a photolithography process. After that, according to the design requirements, holes are drilled on the heavy copper PCB to provide conditions for installing components and connecting circuits.

After the drilling is completed, a metal layer is covered on the hole wall using electroplating technology to achieve a connection between the layers, and a layer of copper foil is electroplated on the hole wall to increase the thickness of the conductor and the surface pad. Next, the dry film and excess copper foil are removed, and chemical etchants are generally used to make the circuit pattern clearer.

Subsequently, the heavy copper PCB is subjected to surface treatment, such as gold plating, tin spraying, etc., to improve welding performance and corrosion resistance. Finally, the finished heavy copper PCB is strictly inspected and tested to ensure that its electrical and mechanical properties are consistent with the design requirements.

Professional Heavy copper PCB manufacturers – BEST Technology

The minimum width and thickness of the heavy copper PCB conductor are mainly determined based on the required current carrying capacity and the maximum temperature rise allowed for the conductor. From the perspective of its size specifications and actual manufacturing process, the routing of the circuit board may not be a regular rectangular shape.

It is worth noting that the thicker copper conductor will significantly increase the overall thickness of the circuit board to a large extent. In terms of manufacturing process, the additive method (electroplating) process has certain advantages over the subtractive method (etching) process, but at the same time, its cost is relatively higher.

BEST Technology process capabilities:

Substrate: FR4/Aluminum

Copper thickness: 4OZ~10OZ

Extremely heavy copper thickness: 20~200 OZ

Contour: Milling, Punching, V-Cut

Solder mask: White oil/Black oil/Blue oil/Green oil/Red oil

Surface treatment: Immersion gold, tin spraying, OSP

Maximum panel size: 580*480mm(22.8″*18.9″)

Heavy copper PCB occupies an important position in the electronics field with its unique characteristics. With high current carrying capacity, good heat dissipation performance, higher mechanical strength and excellent reliability, it has become an ideal choice for many high-demand application scenarios. From power electronics to automotive electronics, from aerospace to medical equipment and communications, heavy copper PCB plays a key role.

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How to make two sided pcb in Altium?

December 13th, 2024

How to make two sided pcb Altium? Be familiar with the interface and basic operations of Altium Designer, accurately design the circuit schematic diagram, reasonably plan the PCB layout, make full use of the double-sided space, conduct fine wiring, ensure signal integrity, and correctly set the rules and parameters to meet production requirements.

What is a double-sided PCB?

Double-Sided PCB refers to a printed circuit board with conductive copper layers on both sides, and the circuit between the two sides is connected through through holes (small holes). This design enables double-sided PCBs to implement more complex circuit layouts in limited space without significantly increasing the board size.

Double-sided PCBs are widely used in various application scenarios that require complex circuit layouts and high-density assembly, such as computers, communication equipment, industrial control, and consumer electronics.

Because it can achieve more complex circuit designs in a limited space, double-sided PCB is particularly suitable for applications that require higher-function electronic equipment, such as smart home equipment, computer hardware, medical equipment, etc.

How to make two sided pcb in Altium?

Here are the general steps for making a double-sided PCB in Altium:

Create a project: In Altium Designer, select “File” > “New” > “Project” to create a new PCB project.

Draw a schematic: Select “File” > “New” > “Schematic” to create a new schematic file. Add the required components to the schematic and connect them using wires.

Add package library: If you need to use a custom package library, you need to add it to the project. Select Design > Add/Remove Library and select the desired footprint library.

Generate PCB: After the schematic is drawn, select “Design” > “Update PCB Document” to import the components and connection information in the schematic into the PCB.

Layout components: In PCB, components are laid out according to design requirements. You can use Altium’s automatic layout tools or manual layout.

Routing: Use Altium’s routing tools to route the connections between components. You can choose automatic routing or manual routing.

Add silkscreens and logos: Add silkscreens and logos to the PCB to easily identify components and connections.

Check and Validate: Use Altium’s Design Rule Checker tool to check that your PCB design meets requirements. Electrical rule checks, wiring rule checks, etc. can be performed.

Generate manufacturing files: After the PCB design is completed, select “File” > “Fabrication Outputs” to generate manufacturing files, such as Gerber files, drilling files, etc.

How to make two-sided PCB?

After designing the layout of the double-sided PCB in the PCB design software according to the circuit schematic diagram, the production process begins.

The complete process of making double-sided PCB:

Preparation materials: Choose a copper-clad laminate covered with copper foil of a specific thickness (such as 18μm, 35μm, etc.) on both sides, and determine the copper foil specifications according to circuit requirements.

Drilling: According to the drilling documents, use a CNC drilling machine to drill high-precision holes to ensure the connection paths for the circuits on each layer.

Copper immersion: Place the drilled PCB board in a copper immersion liquid to deposit a thin copper layer on the hole wall, laying the foundation for subsequent copper electroplating and ensuring the reliability of electrical connections.

Copper electroplating: Use the PCB board as the cathode to energize the copper ion plating solution, thicken the copper layer to the design standard, and enhance the electrical conductivity and mechanical properties.

Exposure and development: The Gerber file is made into a film. After applying photoresist to the copper-clad board, the film pattern is printed on the board through exposure equipment, and then the unexposed photoresist is dissolved with a developer to initially present the circuit pattern.

Etching: Use ferric chloride or acidic etching solution to dissolve the copper foil that is not protected by the photoresist, and form precise lines on both sides of the copper-clad board. Then use a film stripping solution to remove the remaining photoresist.

Make the solder mask layer: Use screen printing to apply solder mask ink of the selected color on the circuits on both sides of the board, and use screen printing to print white character ink on the corresponding positions of the cured solder mask layer to mark component information to facilitate assembly and debugging.

Drying treatment: Drying fixes the character ink to avoid fading and blurring.

Surface treatment: Dip tin or spray to coat the pad with tin layer to improve solderability, suitable for products with regular soldering requirements.

Can you put components on both sides of a PCB?

Components can be placed on both sides of the PCB. Both sides of the PCB double-sided panel can be wired and components placed, which can reduce the difficulty of wiring and is suitable for the design of complex circuits.

In a double-board design, larger and denser components such as QFP and BGA are usually placed on the top layer of the board, while plug-in components can only be placed on the top layer. Smaller components and components are placed on the other side (bottom layer) of the plug-in components. Chip components with a small number of pins and loose arrangement.

How do you flip a PCB in Altium?

Use the shortcut key: Press the “V” key and then the “B” key to quickly flip the PCB view to the bottom layer. This method is like turning the PCB board over visually, making it easier to view the underlying component layout, wiring, etc.

Operation through the menu: Select the “View” menu, find the “Flip Board” option in the drop-down menu, and click it to flip the PCB view between the top and bottom layers. This method is relatively intuitive and suitable for users who are not familiar with shortcut keys.

How do you flip a component to the bottom in Altium?

Menu operation: Hold down the “Ctrl” key and use the left mouse button to click the components that need to be flipped one by one to select them all. Then follow the menu operation steps for flipping a single component, that is, select “Edit” – “Move” – ”Flip Selection”, so that multiple selected components can be flipped to the bottom together.

Shortcut key operation: First select multiple components, the selection method is the same as above, also hold down the “Ctrl” key and click the components. Then press the “L” key to flip these selected components to the bottom layer at the same time.

How do I mirror graphics in Altium?

In the schematic editing environment, select the component that needs to be mirrored. You can select it by left-clicking the component with the mouse. Then select the “Edit” menu and click on the “Mirror” option. Or use the shortcut key “Ctrl + M” to mirror the component in the horizontal direction. Properties such as the pin connections of the component will not change, only the graphic appearance will be mirrored.

In the PCB editing environment, select the component to be mirrored by clicking it directly with the left mouse button. Select the “Move” submenu under the “Edit” menu and click on the “Mirror Selection” option. The component will be mirrored with the axis perpendicular to the PCB board plane as the axis of symmetry. This is useful when adjusting component layout, especially when you need to flip the component from top to bottom and mirror it at the same time, etc.

In addition, for some regularly shaped components (such as rectangular components), you can also select the component and hold down the “L” key to achieve the effect of flipping and mirroring the component between layers.

How do I rotate a whole PCB in Altium?

Use keyboard shortcuts to rotate in the PCB Editor:

Select the entire PCB (you can select the entire PCB through the “Edit” menu – “Select” – “All”). Press “Space” to rotate the PCB counterclockwise in 90° increments. This is a faster way to rotate, making it easier to adjust the direction of the PCB during the layout and routing process to better fit the workspace or meet specific layout ideas.

Rotate via menu options:

Also select the entire PCB first. Select the “Edit” menu – “Move” – ”Rotate Selection”. In the pop-up dialog box, you can set the rotation angle. The PCB can be rotated accurately according to the design requirements, such as inputting any angle such as 45°, 60°, etc., and then clicking the “OK” button to complete the rotation operation. This method is relatively more flexible and can meet the rotation needs of non-integer multiples of 90°.

During the design process, pay attention to key points, be familiar with the operation of the software, accurately design the circuit schematic, reasonably plan the PCB layout, conduct fine wiring, set correct rules and parameters, and conduct strict inspection and optimization. Only in this way can the quality and reliability of PCB design be ensured and meet the needs of practical applications.

Tags: make two sided pcb Altium, PCB, pcb design
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What is the ffsd pcb connector?

December 12th, 2024

What is the ffsd pcb connector? The FFSD PCB connector is a high-performance, high-reliability printed circuit board connector, usually used to connect flexible flat cables (FFC/FPC) and flexible printed circuits (FPC). The FFC/FPC cable connected by the FFSD connector has good flexibility, can bend and move in a small space, and can adapt to the connection requirements between circuit boards of different shapes and sizes.

What is a PCB connector?

The PCB connector is a connector specifically used to connect and fix printed circuit boards (PCBs). It usually adopts a pin press-in design with super strong FPC cable clamping force. It is mainly used for PCB board and board connection to ensure precise and reliable electrical connection.

In terms of classification, it is divided into plug-in type (convenient plug-in and replacement), crimping type (high reliability, suitable for vibration environment) and welding type (stable electrical performance, not easy to replace) according to the connection method; it is divided into power connector (transmitting power), signal connector (transmitting signals) and hybrid connector (transmitting power and signals at the same time) according to the purpose.

What is the ffsd pcb connector?

FFSD connector is a type of PCB connector with specific design, specifications and performance characteristics. FFSD connectors generally adopt specific contact systems and shell designs, with compact shells and unique locking devices, etc., to ensure the stability and reliability of the connection and adapt to its specific application scenarios and signal transmission requirements.

FFSD connectors are designed and developed for flexible connection with shielded flat cables. Its excellent characteristics enable it to perform well in environments with strict requirements for high anti-interference and compact layout, and can effectively connect flexible flat cables (FFC/FPC) and flexible printed circuits (FPC).

FFSD cables are mostly made of special flexible and anti-bending materials. The shielding layer on the surface can significantly reduce electromagnetic interference (EMI) in high-frequency environments, effectively ensure the stability and accuracy of signal transmission, and provide solid guarantees for the efficient and stable operation of various precision electronic equipment.

What is the structure of the ffsd pcb connector?

FFSD connectors are mostly designed with double-row pins, and the pin pitch is usually 0.050 inches (1.27mm), which can meet different signal transmission requirements. In addition, the number of pins generally ranges from 3 to 25, which can adapt to various circuit connection requirements.

The shell is generally made of insulating materials such as plastic, such as PBT, to provide mechanical support and protection for the connector, ensure the normal operation of the internal contact system, and enable the connector to be properly aligned and installed with other components. At the same time, the shell may also have some special designs, such as locking devices, which are used to fix the connector and the mating parts to prevent loosening or falling off during use.

The common installation method is cable installation, which connects the connector and the cable together through welding or crimping, and then connects the cable to the PCB board to achieve signal transmission. Some FFSD connectors may also support surface mount technology (SMT), directly soldering the connector on the surface of the PCB board to adapt to different circuit layouts and design requirements.

What are the most common PCB connectors?

Common PCB connectors include:

Pin-and-female connectors: They consist of a pin-and-female connector with metal pins and a female connector with a flexible metal sheet socket, used to connect between circuit boards or other components.

USB connector: There are many types such as Type-A and Type-B. The internal metal contact piece transmits power and data. It is widely used for data transmission and charging of computers, mobile phones and other devices.

HDMI connector: It contains multiple pins to transmit high-definition video and audio signals, has shielding measures, and is used to connect video sources and display devices.

SATA connector: It uses serial data transmission, has data and power interfaces, and is a key component for connecting hard disks, optical drives and motherboards in computers.

D-Sub connector (VGA connector): It is shaped like a “D”, and multiple pins transmit analog video signals. It is still used to connect computers and monitors in some old devices or low-resolution occasions.

RJ45 connector: It has 8 internal metal contacts, which are used for Ethernet connection. It is an important component for computer network card interfaces, router LAN interfaces, etc. to achieve wired network communication.

How to choose PCB connectors?

There are several key factors to consider when choosing PCB connectors:

Technical parameters: First, understand the technical requirements of the application, including pin spacing, welding method, rated voltage, rated current, number of plug-in and pull-out times, temperature range, board spacing, connector geometry, and solder hole diameter of the soldering lug.

Electrical performance: The electrical performance of the connector includes limiting current, contact resistance, insulation resistance, and dielectric strength.

Installation space: Pay attention to the outer dimensions and installation space of the connector to ensure that it does not interfere with other parts. Pay attention to the number of pins and spacing to avoid high temperature deformation during the soldering process of the SMT machine.

Packaging form: For automated assembly, the packaging form is also important. Common packaging forms include tape and reel packaging and strip boxes, the former is more suitable for mass production.

Suggestions for choosing different types of PCB connectors:

Pin and female headers: cheap and common, suitable for low-end, large-size devices. The advantages are cheap and convenient, and the disadvantages are large size and difficult to bend.

High-end board-to-board connectors: many pins, small size, suitable for compact products. The advantage is stable connection, the disadvantage is high price and cannot be plugged and unplugged frequently.

Thickened board-to-board connector: suitable for development boards and test boards, the advantage is cheap and easy to connect and measure, the disadvantage is large size and not suitable for mass production scenarios.

FPC connector: suitable for the connection between the main board and the sub-board, the advantage is small size and flexibility, the disadvantage is high price.

How does the ffsd pcb connector work?

The working principle of the ffsd pcb connector is mainly based on the design and manufacture of printed circuit boards (PCBs). PCB connectors are made of printed circuits and printed components or a combination of the two by pre-designing on insulating materials to achieve electrical connections between electronic components.

Specific working mechanism of PCB connectors

Electrical connection: The wires and metal lines on the PCB are used to connect electronic components. The electrical performance requirements of the circuit are met by laying out and designing the parameters such as the path, width and spacing of the wires.

Mechanical support: PCB provides mechanical support and fixation for electronic components, fixes components by welding, plug-in or surface mounting, and ensures the relative position and stability between components.

Signal transmission: The wires and circuit paths on the PCB are used to transmit signals in electronic devices, considering factors such as signal integrity, noise suppression and interconnection length to ensure stable signal transmission and reduce interference2.

PCB connectors include not only traditional pin connectors and terminal blocks, but also various forms such as SMT (surface mount technology) and BGA (ball grid array).

The design and manufacture of these connectors have improved the miniaturization, integration and reliability of electronic products. In practical applications, PCB connectors are widely used in various electronic devices as an important carrier for connecting, supporting and managing electronic components.

What are the advantages of ffsd pcb connector?

The advantages of FFSD PCB connectors mainly include the following points:

High flexibility and adaptability: The FFC/FPC cable connected by the FFSD connector has good flexibility, can bend and move in a small space, and can adapt to the connection requirements between circuit boards of different shapes and sizes.

Excellent anti-interference ability: The shielding layer on the surface of the FFSD cable can effectively reduce electromagnetic interference in high-frequency environments, ensure the stability and reliability of signal transmission, and enable the equipment to work normally in complex electromagnetic environments.

High reliability: The locking mechanism of the connector can firmly fix the cable to prevent it from loosening or falling off due to vibration, impact and other factors during use, ensuring the stability of the connection, thereby improving the reliability and service life of the entire electronic system.

Good electrical performance: It can meet the requirements of high-speed signal transmission, has low contact resistance and transmission loss, and ensures the integrity and accuracy of the signal.

High degree of customization: FFSD connectors can be customized according to specific application requirements, such as cable length, width, bending angle, number of connector pins, spacing, etc. can be designed on demand, which can better meet personalized connection needs.

What are the applications of ffsd pcb connectors?

FFSD PCB connectors usually refer to FFC/FPC PCB connectors, which are widely used, mainly in the following fields:

Consumer electronics: Connecting various components in smartphones and tablets to meet their small space, multi-function, and thin requirements, and ensure signal and power transmission.

Medical electronics: In monitoring, imaging, circuits and displays, it helps data acquisition and processing to meet the needs of small and portable equipment.

Industrial control: Connect key components in automated production lines and instrumentation to achieve signal interaction and coordination, and improve production and equipment performance.

Communication equipment: Connect related modules in base stations, optical communications, routers, etc. to ensure stable signal transmission and adapt to high-speed communication and anti-interference requirements.

Aerospace: Applied to avionics and satellite communication equipment to ensure stable signals and reliable operation of equipment in harsh environments, which is related to flight and communication safety.

As a high-performance and high-reliability electronic connection component, FFSD PCB connector plays an indispensable role in modern electronic devices. Its high flexibility, anti-interference ability, miniaturization, convenient assembly, high reliability, good electrical performance, high degree of customization and cost-effectiveness have made it widely used in consumer electronics, automotive electronics, medical electronics, industrial control, communication equipment, aerospace and other fields.

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What is PCB nickel plating?

December 12th, 2024

What is PCB nickel plating? PCB nickel plating refers to a layer of nickel covering on the surface of the circuit board. Its main function is to enhance the corrosion resistance, resistivity and solderability of the circuit board, while improving signal transmission performance and reliability. The nickel plating layer can protect the surface of the circuit board, prevent diffusion between metals, and improve the mechanical strength and durability of the circuit board.

PCB finition nickel or électrolytique soudabilité refers to the finishing process used on PCB to enhance solderability and protect exposed copper surfaces. Nickel is often applied as an underlayer, providing a robust, corrosion-resistant base for further finishes. Electrolytic finishes, such as electroplated gold or tin, are added on top to improve conductivity, durability, and ease of soldering. These finishes ensure reliable component attachment, minimize oxidation, and support the long-term performance of the PCB in various environments. The choice of nickel or an electrolytic finish depends on the specific application requirements, such as thermal resistance, electrical performance, and mechanical stability.

What is the function of PCB nickel plating?

The main functions of PCB nickel plating include improving wear resistance, preventing metal diffusion, enhancing mechanical strength, and adapting to the requirements of hot pressure welding and brazing.

Nickel plating on PCB (Printed Circuit Board) can significantly improve the wear resistance of switch contacts, contacts or plug gold. At the same time, the nickel layer acts as a barrier layer, which can effectively prevent the diffusion of copper and other metals, thereby protecting the circuit board. performance and lifespan.

In addition, the nickel layer can also improve the mechanical strength of the gold layer, making it more suitable as a substrate coating for precious and base metals.

Corrosion resistance: The nickel plating layer can well protect the surface of the circuit board and enhance its corrosion resistance, allowing the circuit board to still operate stably in harsh environments.

Resistivity: The resistivity of the circuit board can be increased by nickel plating, especially in high-frequency circuits, which improves the signal transmission quality of the circuit board.

Solderability: Nickel plating makes the surface of the circuit board easier to handle, increasing its solderability.

Signal transmission performance: The nickel plating layer has good electrical conductivity and can reduce signal transmission loss.

Mechanical strength and durability: Nickel plating can increase the mechanical strength and durability of the circuit board and extend its service life.

How thick is PCB nickel plating?

The thickness of PCB nickel plating is usually around 2~2.5μm. The main function of the nickel plating layer is to serve as the bottom layer for gold or other precious metal plating, providing good bonding and protection. The thickness control of the nickel plating layer is very important for the appearance and quality of the product. Generally, a nickel layer thickness of about 5 μm is required to be sufficient.

PCB nickel plating thickness calculation formula

The calculation formula for PCB nickel plating layer thickness is: plating thickness (um) = current density (ASF) × plating time (min) × plating efficiency (%) × 0.01821.

Formula explanation

Current Density (ASF): The number of amperes passing per unit area per square foot.

Electroplating time (min): The time required for electroplating, in minutes.

Electroplating efficiency (%): The actual utilization efficiency of current during the electroplating process, usually between 90% and 100%.

0.0182: This is a plating coefficient used to convert current density, plating time and plating efficiency into plating thickness.

Assuming that the current density is 10 ASF, the plating time is 30 minutes, and the plating efficiency is 95%, the thickness of the nickel plating layer is calculated as follows:

Current Density: 10 ASF

Plating time: 30 minutes

Plating efficiency: 95% (0.95)

Plating coefficient: 0.0182

Coating thickness = 10 × 30 × 0.95 × 0.0182 = 5.274 um

What are the differences between PCB nickel plating and tin spraying?

1. Process principle

Nickel plating: Nickel plating is to electrochemically deposit a layer of metallic nickel on the surface of the circuit board. This process can enhance the electrical conductivity, corrosion resistance and welding performance of the circuit board.

Spray tin: Spray tin uses thermal spray technology to spray a layer of tin alloy on the surface of the circuit board. The tin spray process can protect the circuit board from oxidation and corrosion while improving the reliability of welding.

2. Application effect

Nickel plating effect: The surface of the circuit board after nickel plating has a uniform luster, and the nickel layer is closely combined with the base material, which can effectively resist the erosion of the external environment. In addition, the nickel layer also has good ductility and toughness, which is beneficial to subsequent processing and assembly.

Tin spraying effect: The surface of the circuit board after tin spraying presents a dense tin alloy layer with good electrical conductivity and corrosion resistance. The tin spray process can also adjust the thickness and uniformity of the tin layer according to needs to meet the needs of different application scenarios.

3. Applicable scenarios

Applicable scenarios for nickel plating: Nickel plating process is suitable for circuit boards with high requirements on conductivity, corrosion resistance and welding performance, such as communication equipment, automotive electronics and other fields. In addition, nickel plating is also commonly used for repair and reinforcement of circuit boards.

Applicable scenarios for spray tin: The spray tin process is more suitable for circuit boards that require higher welding reliability and oxidation resistance, such as household appliances, industrial control and other fields. At the same time, the tin spray process is also suitable for decorative treatment on the surface of circuit boards.

The role of nickel sulfamate in pcb nickel plating

1. Improve electroplating efficiency: Nickel sulfamate can promote the electroplating reaction, significantly increase the electroplating speed, thereby shortening the electroplating time.

2. Improve coating quality: Nickel sulfamate can inhibit the crystallization of nickel in the electroplating solution, making it smaller and more uniform, thereby forming a denser and more uniform nickel coating.

3. Reduce internal stress: Nickel sulfamate helps reduce the internal stress of the coating, which is particularly important when plating complex-shaped objects to avoid cracking or peeling of the coating.

4. Control the pH value of the solution: Nickel sulfamate can maintain the stability of the pH value of the electroplating solution, which is crucial to ensuring the consistency of electroplating quality.

How to solder nickel-plated pins on PCB?

Preparation before welding: Before welding, first apply flux on the pad and treat it with a soldering iron to prevent poor welding caused by poor tin plating or oxidation of the pad. For the chip, use tweezers to carefully place the PQFP chip on the PCB board, making sure the chip is placed in the correct orientation and the pins are aligned.

Soldering the chip: Adjust the temperature of the soldering iron to above 300 degrees Celsius, dip a small amount of solder on the tip of the soldering iron, and use a tool to press down the aligned chip. Solder the two pins at diagonal locations to secure the chip. When soldering all pins, make sure the tip of the soldering iron is parallel to the soldering pins to prevent overlapping and overlapping soldering.

Check and adjust: After soldering all pins, wet all pins with flux to clean the solder, suck off excess solder to eliminate shorts and overlaps. Use tweezers to check for mis-soldering.

Things to note when welding:

Temperature control: Pay attention to temperature control when welding to avoid poor welding due to too high or too low temperature.

Pin handling: During the soldering process, make sure the pins are moist to avoid weak soldering caused by improper pin handling.

Frequently asked questions and solutions:

Pad Oxidation: If the pad is oxidized, it can lead to poor soldering. You can apply flux and treat the pads before soldering.

Damaged pins: Be careful when using tweezers to avoid damaging the pins.

PCB nickel gold plating process

Degreasing: First, the PCB is degreased to remove grease and dirt on the surface to ensure that the coating can be firmly adhered to the PCB surface.
Water washing: After degreasing, wash with water to remove residual degreasing agent.
Neutralization: Use a neutralizing agent to treat the PCB surface to adjust its pH value in preparation for subsequent steps.
Water washing: After neutralization, wash again to ensure that the neutralizer residue is removed.
Micro-etching: perform slight corrosion treatment on PCB to remove the oxide layer on the surface and increase the adhesion of the coating.
Water washing: Wash with water after micro-etching to remove residual micro-etching agent.
Pre-soak: Soak the PCB in a pre-soak solution to further prepare the surface.
Palladium activation: Use palladium activation solution to treat the PCB surface to enhance the adhesion of the coating.
Air blowing and agitation for water washing: Use air blowing and agitation for water washing to ensure that the surface is clean.
Electroless nickel: A layer of electroless nickel is deposited on the surface of the PCB as the bottom layer.
Hot water washing: After electroless nickel deposition, hot water washing is performed to remove residual electroless nickel solution.
Electroless Gold: A layer of electroless gold is deposited on the electroless nickel layer to form the final gold plating layer.
Recycling water washing: After electroless gold deposition, recycling water washing is performed to remove residual electroless gold solution.
Post-processing water washing: Carry out final water washing to ensure the surface is clean.
Drying: Finally, drying is performed to complete the entire nickel gold plating process.

PCB finition nickel or électrolytique effet champagne refers to a specific surface treatment that enhances the visual and functional qualities of printed circuit boards.

This finish involves the application of a nickel layer, often followed by an electrolytic coating such as gold, which creates a sparkling, champagne-like effect. The aesthetic appeal is complemented by functional advantages, including improved solderability, corrosion resistance, and enhanced conductivity.

The “effet champagne” is particularly desirable in high-end electronics or luxury applications, where both performance and appearance are critical. This finish ensures durability while delivering an elegant visual characteristic that sets the product apart.

PCB nickel plating layer adhesion test standard national standard

The national standard for PCB nickel plating layer adhesion testing is GB/T 9286-1998. This standard applies to coating adhesion testing, including nickel plating. Testing methods include peeling test, scratch test and impact test, etc. The specific test method chosen can be determined according to the characteristics and requirements of the test material.

Test method

Cross-hatch test: Use a sharp blade to cut 10 × 10 small grids of 1 mm × 1 mm on the surface of the nickel plating layer. Each scratch line should be as deep as the bottom layer of the plating layer. Then use a soft brush to clean the debris in the test area, and stick a tape with an adhesion of 350 g/cm² to 400g/cm² (such as 3M No. 600 tape). After wiping hard, pull off the tape quickly in the vertical direction and observe the coating. Shedding condition.

Peeling test: Peel off the nickel-plated sample and observe whether the coating peels off or deforms.

Impact test: Conduct an impact test on the nickel plating layer to observe its impact resistance.

Judgment criteria

5B: The edge of the scribed line is smooth, and there is no coating peeling off at the edge and intersection of the scribed line.
4B: There is a small piece of coating peeling off at the intersection of the scribed lines, and the total peeling area is less than 5%.
3B: There are small pieces of coating peeling off at the edges and intersections of the scribed lines, and the total peeling area is between 5% and 15%.
2B: There are pieces of coating peeling off at the edges and intersections of the scribed lines, and the total peeling area is between 15% and 35%.
1B: There are pieces of coating peeling off at the edges and intersections of the scribed lines, and the total peeling area is between 35% and 65%.
0B: There are pieces of coating peeling off at the edges and intersections of the scribed lines, and the total peeling area is greater than 65%2.

PCB nickel plating process flow and solutions to common problems

Surface treatment: Before nickel plating a circuit board, the surface of the circuit board needs to be properly treated to ensure that the surface finish and roughness meet the requirements.

Electrolyte formula: The formula of electrolyte has a great influence on the quality of nickel plating on circuit boards. The formula and concentration need to be adjusted according to specific requirements.

Coating thickness: Anti-corrosion performance is related to coating thickness and needs to be controlled according to actual needs.

Nickel layer structure: The nickel layer obtained by nickel plating on the circuit board should be tight and strong, without defects such as cracks and pores.

Subsequent processing: After nickel plating the circuit board, a series of subsequent processing is required, such as washing, polishing, cleaning, packaging and other operations.

PCB nickel plating is an important electronic manufacturing process, which can provide PCB with protection against copper oxidation, improve wear resistance, enhance corrosion resistance and improve welding performance. In the PCB nickel plating process, key points such as plating solution formula, process parameters, equipment and environment, and quality control need to be paid attention to to ensure the quality and consistency of nickel plating.

Tags: pcb finition nickel or electrolytique effet champagne, PCB finition nickel or électrolytique soudabilité, PCB nickel plating
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What is copper black pcb?

December 11th, 2024

What is copper black pcb? Copper black PCB, full name copper-based black solder mask PCB, is a circuit board made of special black solder mask ink on the basis of traditional PCB. Compared with the traditional green solder mask, the black solder mask has good light shielding performance, which can reduce the interference of light on sensitive components on PCB. The special ingredients in it can enhance the electromagnetic shielding performance of PCB to a certain extent and reduce the impact of external electromagnetic interference on electronic equipment.

What are the common colors of PCB?

Common colors of PCB include green, blue, black, red, yellow, white, purple and brown. These colors are mainly used for identification, aesthetics and special applications. Although they do not affect circuit performance, they play an important role in product design.

Green is the most common color because green solder mask ink is cost-effective, has good visual contrast, is easy to check welding quality and circuit layout, and is friendly to the human eye.

Blue has also gradually increased in recent years, providing a different visual effect from green, appearing novel and high-end, and is suitable for electronic products that pursue product appearance differentiation.

Black gives people a high-end and mysterious feeling. It is often used in high-end audio equipment, gaming hardware, etc., but the production process has high process requirements and defects are difficult to detect.

Red is often used in high-end communication equipment, military electronic products, etc., because it has good thermal stability and weather resistance, and is suitable for use in high temperature and harsh environments.

Yellow was once widely used, but it is now less used due to poor contrast with routing and screen printing.

White looks clean and neat in various environments, but it is less used because it easily hides routing.

Colors such as purple, brown and pink are also used, but they are relatively rare.

The choice of these colors not only affects the appearance and brand image of the product, but also reflects the cost considerations of designers and manufacturers to a certain extent.

What is black core pcb?

Black core PCB is a multi-layer PCB board that is favored for its unique manufacturing process and performance. The manufacturing process of black core PCB includes multiple complex steps to ensure its excellent quality and performance and meet the needs of electronic equipment for complex circuits.

Layout finishing: Engineers need to organize and check the PCB layout to ensure that the CAD file is converted into a unified format and meets the requirements of the manufacturing process.

Core board production: Clean the copper clad board and use UV lamp to cure the copper foil under the photosensitive film to form the required circuit layout.

Core board punching and inspection: This step ensures the precise alignment between layers.

Lamination technology: Use prepreg as adhesive and insulating material to fix the layers at high temperature.

Drilling and hole wall copper chemical precipitation: Prepare for electroplating.

Outer PCB etching: Complete the production of the entire multi-layer PCB layout.

Solder mask: Apply solder mask to prevent the copper circuit from contacting the outside world.

Silk screen: Silk screen component identification symbols, test points and other marks on the PCB.

Surface treatment: Apply a protective layer such as OSP (organic solderability protective layer) or gold.

Solder mask window: Remove the solder mask through UV light and etching to expose the pad.

The black color of black core PCB usually comes from the special ink used in the solder mask layer. Compared with other colors of solder mask ink, it may have higher UV resistance, better protect the PCB from damage when exposed to sunlight for a long time, and has better electromagnetic shielding performance, which can reduce the impact of external electromagnetic interference on the circuit on the PCB.

What are the advantages of black core PCB?

The advantages of black core PCB mainly include the following aspects:

Better heat dissipation performance: Black core PCB uses a black substrate, which can better absorb and release heat. Therefore, in a high-temperature working environment, black core PCB can better dissipate heat and ensure the normal operation of the circuit board.

Superior electromagnetic shielding performance: The black solder mask used in black core PCB provides better electromagnetic compatibility and radio frequency interference shielding effect, which helps to reduce signal interference.

Higher reliability: The substrate of black core PCB has good heat dissipation performance, which can effectively solve the problems of aging of traditional circuit board substrate and capacitor leakage, thereby improving the reliability and durability of the circuit board.

Beautiful and anti-plagiarism: Black PCB board gives people a high-end and technological impression, which is suitable for some high-end electronic products.

What are the disadvantages of black core PCB?

The main disadvantages of black core PCB include the following:

Cost issue: Because black ink has a higher coverage requirement and stricter manufacturing accuracy requirements, this increases the difficulty and cost of production.

Difficulty in detection: Although black PCB can improve the visibility of soldering quality in some cases, under some lighting conditions, the black surface may reflect light, making it difficult to identify small defects during automatic optical inspection (AOI).

Thermal expansion problem: Because black PCB has strong heat absorption performance, this may cause the thermal expansion rate of PCB to increase under high temperature environment, thus affecting the long-term stability and reliability of the circuit board.

Color difference problem: In the process of washing PCB, black is the most likely to cause color difference, which will cause the PCB defect rate to increase due to color difference.

Common misunderstandings about black core PCB

Some people think that black PCB is difficult to produce, costly, and has high maintenance costs. But in fact, the production cost of black PCB is not necessarily higher than other colors, and the maintenance cost is related to product quality control, not color.

The second misunderstanding is that black core PCB is only suitable for high-end applications, which is also incorrect. Black printed circuit boards can be used in any application, from high-end to low-end, and black PCBs may be used in products of all grades. The grade of the product cannot be judged simply by the color of the PCB.

Some people think that the circuit routing of black PCB is difficult to identify, which increases the difficulty of later maintenance and debugging. But in fact, debugging is assisted by drawings, and maintenance mainly relies on tools and experience, rather than identifying circuit routing with the naked eye.

What are the applications of black core PCB?

The application field of black core PCB is very wide, mainly including the following aspects:

Smartphones: Black core PCB has good electromagnetic compatibility and radio frequency interference shielding effect, which can ensure the stable operation of mobile phones in complex electromagnetic environments, and the black appearance is consistent with the overall design style of the mobile phone, which improves the texture and aesthetics of the product.

Computer field: Black core PCB has important applications in computers, especially in high-performance hardware such as CPU and graphics card. Black core PCB provides a stable operating platform to ensure the stable operation of the equipment.

Camera: The excellent electrical performance and anti-interference ability of black core PCB can meet the needs of cameras, and its black appearance is consistent with the professional image of cameras, which can enhance the overall quality of cameras.

Medical devices: Black core PCBs are also used in medical devices, such as MRI, CT, color ultrasound and other equipment to ensure the stable operation and signal transmission of the equipment.

Why are common PCBs all green solder mask?

The main reasons for the common PCBs to use green solder mask include the following aspects:

Performance and visual effects: First, the visual effect of green ink in the yellow light room is better than other colors, making the logo and tracking lines on the circuit board more clearly visible. In the surface mount technology (SMT) welding process, the green background has a good recognition effect on the instrument, which helps to improve production efficiency and quality.

Environmental protection and cost considerations: Compared with blue and black inks, green ink is more environmentally friendly. Blue ink is doped with cobalt and black ink is doped with carbon. These components may release toxic gases at high temperatures. Green ink does not contain these components, so it is safer.

Convenience of observation and maintenance for workers: Under strong light, green has minimal stimulation to the eyes, which helps reduce eye fatigue and enables workers to maintain clear vision for longer.

Usage habits and brand recognition: Due to the advantages of green ink in many aspects, it has become the preferred color in PCB manufacturing. This usage habit has been continued and consolidated for a long time.

In short, copper black PCB, as a special type of PCB, features a black solder mask, which not only improves the texture and grade of the product, but also performs well in terms of light blocking, electromagnetic shielding performance, heat dissipation performance, etc., meeting the diverse needs of PCBs in different fields, and playing an important role in high-end electronic products, optical equipment, automotive electronics and medical equipment.

Tags: Black core PCB, copper black pcb, PCB
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