What Is led ring light pcb

August 2nd, 2024

led ring light pcb leads the development of lighting industry with its innovative design, high efficiency and flexibility, bringing more intelligent and comfortable lighting experience to our life.

It is not only an integrated platform of electronic components, but also a perfect combination of modern technology and aesthetics, and is the focus of future lighting trends.

led ring light pcb, like a magic wand on the electronic stage, uses precise SMT technology to lightly attach LED components to it. Whether it is a warm small lamp for home decoration, efficient lighting in commercial space, or smart display inside the car, it is indispensable.

Its core structure includes efficient LED lamp beads, power cords that provide electricity, and intelligent controllers that adjust light effects, which together build an excellent lighting solution.

What Is led ring light pcb

Why use mcpcb for led ring light pcb

With the continuous development of LED technology, the heat generated by LEDs has gradually increased. The traditional FR4 printed circuit board (PCB) has been unable to meet the heat dissipation requirements due to its low thermal conductivity (only 0.36W/m.K). In order to solve this problem, the metal core printed circuit board (MCPCB) was proposed. It attaches the original printed circuit board to a metal with better thermal conductivity (such as aluminum and copper) to enhance the heat dissipation effect. The thermal conductivity efficiency of MCPCB is higher than that of traditional FR4 PCB, reaching 1W/m.K to 2.2W/m.K, which effectively improves the heat dissipation performance of LED PCB.

In addition, the use of MCPCB can also reduce the number of LEDs required to generate lighting, making it an ideal choice for street lights, automotive LED applications, and backlight unit applications. The use of metal substrates has practical advantages in heat dissipation, thermal conductivity, reliability, and electrical insulation, especially in harsh environments, and can also achieve reliable operation of LEDs. For example, using a metal substrate can reduce the LED junction temperature by 20-30°C, improve light output and enhance the overall performance of the product, ensure consistent UV light generation, and expand the possibilities of UV applications in various industries.

Unveiling the Components of LED PCBs

LED Chips: The heart of the LED PCB, these semiconductor chips emit light when current passes through them.
Substrate Material: The base layer of the PCB provides mechanical support and thermal conductivity.
Copper Traces: These conductive pathways connect the LEDs and other components, allowing current to flow through the circuit.
Solder Mask: A protective layer that covers the copper traces, safeguarding them from external factors and preventing short circuits.
Silkscreen: This layer contains markings and labels, providing important information about the PCB’s components and assembly.

Advantages of led ring light pcb?

Thermal performance advantages of metal substrate PCB

High thermal conductivity:
The thermal conductivity of metal substrate PCB is much better than that of traditional plastic substrates such as FR4. It can effectively conduct the heat generated by components, reduce the operating temperature of components, and improve the reliability and life of circuit boards.

Good thermal stability:
Metal substrate PCB can maintain good dimensional stability and electrical performance in high temperature environment, and is suitable for high temperature working environment.

Mechanical performance advantages of metal substrate PCB

High strength: Metal substrate PCB has high mechanical strength and rigidity, is not easy to deform and break, and can withstand large external forces and vibrations.

Good processability: Metal substrate PCB can be processed by conventional mechanical processing methods such as drilling and cutting, which is convenient for the production of circuit boards with complex shapes and sizes.

Electrical performance advantages of metal substrate PCB
Excellent electrical insulation performance: Metal substrate PCB has a special insulation layer design to ensure good electrical insulation performance and avoid electrical short circuits between components.

Low impedance: The conductive layer of metal substrate PCB is made of metal material, which has low impedance, which is conducive to signal transmission and processing.

How does led ring light pcb dissipate heat?

Compared with the traditional FR-4, the aluminum substrate can reduce the thermal resistance to the minimum, making the aluminum substrate have excellent thermal conductivity; compared with the thick film ceramic circuit, its mechanical properties are extremely good.

In the circuit design scheme, the heat diffusion is handled very effectively, thereby reducing the module operating temperature, extending the service life, and improving the power density and reliability; reducing the assembly of the heat sink and other hardware (including thermal interface materials), reducing the product volume, and reducing the hardware and assembly costs; combining the power circuit and the control circuit

How to make a LED light circuit board?

Step 1: Design Your LED PCB:
Using PCB design software, create a schematic for your LED circuit and design the PCB layout, considering component placement and signal flow.

Step 2: Choose the Materials:
Select a suitable substrate material and copper-clad board based on your project requirements.

Step 3: Transfer the Design:
Print your PCB layout onto a special transfer paper and transfer it onto the copper-clad board using a heat press.

Step 4: Etch the Board:
Immerse the board in an etching solution to remove the excess copper and reveal the copper traces.

Step 5: Drill Holes:
Drill holes on the board to accommodate the LED chips and other components.

Step 6: Solder the Components:
Carefully solder the LED chips and other components onto the board, ensuring secure connections.

Step 7: Test Your LED PCB:
Connect your LED PCB to a power source and test the LEDs to ensure they light up correctly.

How to make a LED light circuit board?

Capabilities of led ring light pcb?

Item	Capabilities
Layer Count	1 – 10 Layers
Max Board Dimension	2464″(6101625mm)
Min Board Thickness	0.6mm
Max Board Thickness	4.0mm
Conductor Thickness	0.5oz – 10oz
Min Line Width/Line Space	4/4mil (0.10/0.10mm)
Min Hole Diameter	10mil (0.25mm)
Min Punch Hole Dia	0.12″ (3.0mm)
Min Hole Spacing	16mil (0.4mm)
Min PAD Ring(Single)	3mil (0.075mm)
PTH Wall Thickness	Normal: 0.59mil (15um); HDI: 0.48mil (12um)
Min Solder PAD Dia	14mil (0.35mm)
Min Soldermask Bridge	8mil (0.20mm)
Min BAG PAD Margin	5mil (0.125mm)
PTH/NPTH Dia Tolerance	PTH: ±3 mil (0.075mm); NPTH: ±2mil (0.05mm)
Hole Position Deviation	±3mil (0.075mm)
Outline Tolerance	CNC: ±6 mil (0.15mm); Die Punch: ±6 mil (0.1mm)
Max Aspect Ratio	10:01
Surface Treatment	ENIG, Flash Gold, Hard Gold Finger, Gold Plating(50mil), Gold finger,

	Selected Gold Plating, ENEPIG, ENIPIG, HAL, HASL(LF), OSP, Silver Imm., Tin Imm

Capabilities

Applications of led ring light pcb?

Application in medical equipment
The rapid progress of medicine is closely related to the rapid development of the electronics industry. Many medical devices are made of basic PCBs alone, such as pH meters, heart rate sensors, temperature measurements, electrocardiographs, electroencephalographs, MRIs, X-ray machines, CT scanners, blood pressure machines, blood sugar level measuring equipment, etc.
Application in industrial equipment
PCBs are widely used in manufacturing, especially in industries with high-power mechanical equipment; these devices run on high power and require high current circuit drive. Such as arc welding, large servo motor drives, lead-acid battery chargers, clothing cotton machines, etc.
Application in lighting
LED lights and high-intensity LEDs are mounted on PCBs based on aluminum substrates; aluminum has the property of absorbing heat and dissipating it in the air.
Application in the automotive and aerospace industries
Flexible PCBs are lightweight but can withstand high vibrations. Because of their light weight, they can reduce the total weight of spacecraft; flexible PCBs can be adjusted even in narrow spaces. These flexible PCBs are used as connectors, interfaces, and can be assembled even in compact spaces

FAQs About led ring light pcb

What is the thermal conductivities and withstanding voltages of BT/FR4 layer and Dielectric layer?
The SinkPAD conducts heat primarily through the copper base (400W/m.K), the withstanding voltages of Dielectric layer is around 4KV.

What is the placement accuracy for the SMT components?
+/-0.05mm is our SMT accuracy tolerance. You are welcome to come to our SMT factory in Shenzhen China and Vietnam.

Can the aluminum be made as the base of sinkpad MCPCB?

Actually, the sinkpad can only use copper as the base.
As you can see the below manufacturing steps, the SinkPad will etch the copper base into convex platform with Copper Etching Solution, then hollow out the Double Layer FR4 PCB, and do lamination with the convex platform.
However, regarding of current technical conditions, since aluminum or aluminum alloy cannot directly react with acid, the reaction process is too complex and difficult to control, which will increase the difficulty of etching the LED pad platform. Considering the scrap rate, the process of etching LED pad platform with aluminum is more complex and the overall cost is higher.

Can I plated copper in mcpcb via holes?
Generally speaking, copper plating through holes requires hole rings, otherwise the copper in the hole wall will easily fall off.

In addition, if it is a copper substrate, through the hole first to resin plug before copper plating.

Otherwise there’s no chemical reaction between copper and copper. And if the copper layer is connected to each copper layer, it is easy to short circuit.

Are you UL certified led pcb manufacturer?

Yes, we are UL certified manufacturer, our UL is E475635. We have already passed UL certificated. Meanwhile, we are passed ISO9001, ISO13485 and IATF16949 certifications.

Our LED pcbs are manufactured under highly monitored by these quality system controls.

How does the conveity of sinkpad manufactured?

Actually the sinkpad can only use copper as the base.

As you can see the below manufacturing steps, the SinkPad will etch the copper base into convex platform with Copper Etching Solution, then hollow out the Double Layer FR4 PCB, and do lamination with the convex platform.However, regarding of current technical conditions, since aluminum or aluminum alloy cannot directly react with acid, the reaction process is too complex and difficult to control, which will increase the difficulty of etching.

Tags: MCPCB, PCB
Posted in best pcb, bestpcb, FAQ, FR4 PCB, HDI PCB, Led PCB, mcpcb, Metal Core PCB | No Comments »

What Is led light pcb?

August 2nd, 2024

led light pcb　, or printed circuit board, is a stable carrier of electronic components. It not only realizes electrical connection but also plays a supporting role. As the core component of electronic products, it is widely used in various electronic devices. In the field of LED lighting, PCB light board provides support and power for LED lamp beads, ensuring their stable operation in scenes such as home, commercial and automotive lighting. PCB with LED is often used to manufacture electronic products such as indicator lights, lighting equipment and display screens. The LED lamp beads on these PCBs are usually precisely soldered by SMT (surface mount technology).

led light pcb

LED PCB light board leads the development of the lighting industry with its innovative design, high efficiency and flexibility, bringing a more intelligent and comfortable lighting experience to our lives. It is not only an integrated platform for electronic components, but also a perfect combination of modern technology and aesthetics, and is the focus of future lighting trends.

Why use mcpcb for led light pcb

With the continuous development of LED technology, the heat generated by LEDs has gradually increased. The traditional FR4 printed circuit board (PCB) has been unable to meet the heat dissipation requirements due to its low thermal conductivity (only 0.36W/m.K). In order to solve this problem, the metal core printed circuit board (MCPCB) was proposed. It attaches the original printed circuit board to a metal with better thermal conductivity (such as aluminum and copper) to enhance the heat dissipation effect. The thermal conductivity efficiency of MCPCB is higher than that of traditional FR4 PCB, reaching 1W/m.K to 2.2W/m.K, which effectively improves the heat dissipation performance of LED PCB.

Why use mcpcb for led light pcb

Advantages of led light pcb?

High thermal conductivity: LED PCB, especially aluminum substrate, uses aluminum alloy material with high thermal conductivity, which can effectively conduct away the heat generated by LED, maintain the stability of LED operation and extend the service life. This high thermal conductivity is essential to prevent heat accumulation and keep LED working at high brightness for a long time.

High efficiency: Compared with traditional incandescent lamps and energy-saving lamps, LED lamps have higher luminous efficiency and can provide better lighting effects while reducing energy consumption. This makes LED PCB have significant advantages in energy saving and environmental protection.

Long life: The service life of LED PCB far exceeds that of traditional lighting products, and it can provide longer continuous lighting, reducing the trouble of frequent bulb replacement and reducing maintenance costs.

Low energy consumption: LED PCB requires much less electricity than traditional lighting equipment while providing the same brightness, which is very important for energy saving, emission reduction and sustainable development

How does led light pcb dissipate heat?

The power device is mounted on the circuit layer. The heat generated by the device during operation is quickly transferred to the metal base layer through the insulating layer, and then the metal base layer transfers the heat to achieve heat dissipation of the device. Compared with the traditional FR-4, the aluminum substrate can reduce the thermal resistance to the minimum, making the aluminum substrate have excellent thermal conductivity; compared with the thick film ceramic circuit, its mechanical properties are extremely good. In the circuit design scheme, the heat diffusion is handled very effectively, thereby reducing the module operating temperature, extending the service life, and improving the power density and reliability; reducing the assembly of the heat sink and other hardware (including thermal interface materials), reducing the product volume, and reducing the hardware and assembly costs; combining the power circuit and the control circuit

How to make a LED light circuit board?

Cutting
Cutting process Picking materials – cutting
The purpose of cutting
Cut the large-sized incoming materials into the size required for production
Precautions for cutting
① Check the size of the first piece of material
② Pay attention to the scratches on the aluminum surface and the copper surface
③ Pay attention to the delamination and flash of the board edge
Drilling
Drilling process
Pinning – drilling – board inspection
The purpose of drilling
Positioning and drilling holes in the board to assist the subsequent production process and customer assembly
Precautions for drilling
① Check the number of holes and the size of the holes
② Avoid scratches on the board
③ Check the flash of the aluminum surface and the hole position deviation
④ Check and replace the drill bit in time
⑤ Drilling is divided into two stages, one drilling: drilling holes after cutting for peripheral tool holes
Second drilling: tool holes in the unit after solder mask
Dry/wet film imaging
Dry/wet film imaging process
Grinding board – film pasting – exposure – development
Purpose of dry/wet film imaging
To present the part required for making circuits on the board
Precautions for dry/wet film imaging
① Check whether the circuit is open after development
② Whether the development alignment is biased to prevent the generation of dry film fragments
③ Pay attention to the circuit defects caused by scratches on the board
④ No air should remain during exposure to prevent poor exposure
⑤ After exposure, it should be still for more than 15 minutes before development
IV. Acid/alkaline etching
Acid/alkaline etching process
Etching-film stripping-drying-board inspection
Purpose of acid/alkaline etching
After imaging the dry/wet film, keep the required circuit part and remove the excess part outside the circuit. During acid etching, attention should be paid to the corrosion of the etching solution to the aluminum substrate;
Precautions for acid/alkaline etching
① Pay attention to incomplete etching and excessive etching
② Pay attention to line width and line thickness
③ Oxidation and scratches are not allowed on the copper surface
④ The dry film should be removed cleanly
V. Silk screen solder mask and characters
Silk screen solder mask and character process
Silk screen-pre-bake-exposure-development-characters
Purpose of silk screen solder mask and characters
① Anti-soldering: protect circuits that do not need soldering and prevent tin from entering and causing short circuits
② Characters: serve as markings
Precautions for silk screen solder mask and characters
① Check whether there is garbage or foreign matter on the board
② Check the cleanliness of the stencil ③ Pre-bake for more than 30 minutes after silk screen printing to avoid bubbles in the circuit
④ Pay attention to the thickness and uniformity of the silk screen
⑤ After pre-bake, the board should be completely cooled to avoid film contamination or damage to the glossiness of the ink surface
⑥ Place the ink side down during development
VI. V-CUT, gong board
V-CUT, gong board process
V-CUT——gong board——tear protective film——remove burrs
Purpose of V-CUT, gong board
① V-CUT: Cut the single PCS circuit and the entire PNL board to leave a small part connected for easy packaging and removal
② Gong board: remove the excess part of the circuit board
Precautions for V-CUT, gong board
① During the V-CUT process, pay attention to the size of the V, the incompleteness and burrs of the edges
② Pay attention to the burrs caused by the gong board, the gong knife is tilted, and the gong knife is checked and replaced in time
③ Finally, avoid scratches on the board when removing the burr
VII. Testing, OSP
Testing, OSP process
Circuit test-voltage resistance test-OSP
Testing, the purpose of OSP
① Circuit test: Check whether the completed circuit is working normally
② Voltage resistance test: Check whether the completed circuit can withstand the specified voltage environment
③ OSP: Allow the circuit to be soldered better
Testing, OSP precautions
① How to distinguish and store qualified and unqualified products after testing
② Placement after OSP
③ Avoid damage to the circuit
VIII. FQC, FQA, packaging, shipment
Process
FQC-FQA-packaging-shipping
Purpose
① FQC conducts full inspection and confirmation of the product
② FQA spot check and verification
③ Pack and ship to customers as required
Note
① FQC should pay attention to the appearance confirmation during the visual inspection and make reasonable distinctions
② FQA should conduct random inspections to verify the inspection standards of FQC
③ Confirm the packaging quantity to avoid mixed boards, wrong boards and packaging damage

Capabilities of led light pcb?

Item	Capabilities
Layer Count	1 – 10 Layers
Max Board Dimension	2464″(6101625mm)
Min Board Thickness	0.6mm
Max Board Thickness	4.0mm
Conductor Thickness	0.5oz – 10oz
Min Line Width/Line Space	4/4mil (0.10/0.10mm)
Min Hole Diameter	10mil (0.25mm)
Min Punch Hole Dia	0.12″ (3.0mm)
Min Hole Spacing	16mil (0.4mm)
Min PAD Ring(Single)	3mil (0.075mm)
PTH Wall Thickness	Normal: 0.59mil (15um); HDI: 0.48mil (12um)
Min Solder PAD Dia	14mil (0.35mm)
Min Soldermask Bridge	8mil (0.20mm)
Min BAG PAD Margin	5mil (0.125mm)
PTH/NPTH Dia Tolerance	PTH: ±3 mil (0.075mm); NPTH: ±2mil (0.05mm)
Hole Position Deviation	±3mil (0.075mm)
Outline Tolerance	CNC: ±6 mil (0.15mm); Die Punch: ±6 mil (0.1mm)
Max Aspect Ratio	10:01
Surface Treatment	ENIG, Flash Gold, Hard Gold Finger, Gold Plating(50mil), Gold finger,

	Selected Gold Plating, ENEPIG, ENIPIG, HAL, HASL(LF), OSP, Silver Imm., Tin Imm

Applications of led light pcb?

Application in medical equipment
The rapid progress of medicine is closely related to the rapid development of the electronics industry. Many medical devices are made of basic PCBs alone, such as pH meters, heart rate sensors, temperature measurements, electrocardiographs, electroencephalographs, MRIs, X-ray machines, CT scanners, blood pressure machines, blood sugar level measuring equipment, etc.
Application in industrial equipment
PCBs are widely used in manufacturing, especially in industries with high-power mechanical equipment; these devices run on high power and require high current circuit drive. Such as arc welding, large servo motor drives, lead-acid battery chargers, clothing cotton machines, etc.
Application in lighting
LED lights and high-intensity LEDs are mounted on PCBs based on aluminum substrates; aluminum has the property of absorbing heat and dissipating it in the air.
Application in the automotive and aerospace industries
Flexible PCBs are lightweight but can withstand high vibrations. Because of their light weight, they can reduce the total weight of spacecraft; flexible PCBs can be adjusted even in narrow spaces. These flexible PCBs are used as connectors, interfaces, and can be assembled even in compact spaces

Tags: MCPCB, PCB
Posted in best pcb, mcpcb, Metal Core PCB | No Comments »

How to Test a PCB Board? – Best Technology

August 2nd, 2024

Nowadays, PCBs became more and more important and you can see it in every electronic device. The PCB plays a critical role in our daily life. With circuit board, the device can power on and help to transmit signals, manage heat and perform electricity. A good PCB can help to improve the overall of your device. However, not all the PCBs are work good and within your expectable, you must know how to test it and ensure it enables a good performance. As an experienced PCB manufacturers in Asia, today we want to share with you how we test a PCB, and we try to use simple words to make you sense.

What is a printed circuit board?

Before knowing the methods of testing circuit board, let’s understand the definition of PCB. A PCB is a flat board made from insulating materials like fiber glasses with conductive pathways etched onto its surface. The pathways we called circuit or traces. These pathways connect different electronic components, so that they can communicate and function together. PCBs come in various materials, shapes and sizes, which always is customized to meet specific applications and performance requirements.

PCBs can be divided into different types according to substrate material used. They are – normal FR4 PCB, polyimide flexible PCB, metal core PCB, ceramic PCB, rogers PCB. Different has its own properties and advantages. The choice of materials and the design of the PCB significantly impact the performance and reliability of the final product. Understanding the materials used in PCBs is crucial for anyone involved in electronics, from hobbyists to professional engineers/designers.

Common PCB Circuit Board Issues

Though PCB has a strong construction, they are easy to be broken or failure since they always encounter a range of issues. These problems can stem from manufacturing defects, wear and tear, or improper handling. Identifying and diagnosing these issues promptly is crucial for maintaining the reliability and performance of electronic devices. Common issues we faced are including:

Open Circuits: These occur when a break in the circuits prevents current flow normally. Open circuits can result from physical damage or manufacturing errors.

Short Circuits: Due to improper soldering, unreasonable circuit design and other reasons, resulting in a short circuit between two or more points in the circuit that should not be connected. This can cause excessive current flow, potentially damaging components.

Grounding: The unreasonable design of ground area leads to interference signals on the grounding, which affects the normal operation of the circuit.

Signal: The signal circuit design is not reasonable, resulting in interference signals on the signal.

Component Failures: Individual components on a PCB can fail due to aging, overheating, or electrical stress breakdown. And incorrect orientation will lead to the failure of PCB.

Soldering Issues: Poor soldering can lead to weak connections, causing intermittent faults or complete circuit failure. This including the dents in the solder joints, this also can make the PCB failure.

Corrosion: PCB exposure to moisture and contaminants for a long time can cause corrosion, degrading the conductive pathways and component leads.

How to check a PCB?

In generally, there are four common ways to check whether if your PCB are good or failure.

1. Visual inspection

The easiest way is visual inspection. Through naked eye observation, check whether the solder joint on the PCB circuit board is firm, whether there is short circuit, open circuit and other phenomena. And look for burnt components, discolored areas, or broken traces, such as somewhere became black or be burned obviously. These are clear indicators of damage.

2. Use a multimeter

Multimeter is a common tool used for measuring PCB. Multimeter is versatility and it has multiplied modes. Select the appropriate mode on the multimeter, such as continuity, voltage, or resistance mode, depending on what you are testing. Before testing, make sure probes are in good condition and properly connected to the multimeter, with the red probe typically being positive and the black probe negative or ground. Click here to read What is the PCB flying probe test?

3. E-tester

E-tester is a good way to test short or open circuit when it is a mass production. If you just want to test one piece PCB, multimeter is much better.

4. Use oscilloscope

An oscilloscope is a powerful diagnostic tool used to observe the waveform of electrical signals in a circuit. Connect the oscilloscope probes to the test points on the PCB, it can capture the waveform. By observing the waveform, determine whether the circuit is working normally.

5. Use a thermal imager

A thermal imager also is a effective way to check the condition of PCB. It can capture the temperature distribution on the PCB. It helps identify areas with excessive heat, which can indicate potential issues.

How to Test a Circuit Board with a Multimeter Effectively?

Testing a circuit board with a multimeter is essential for diagnosing and fixing electronic issues. A multimeter can measure voltage, current, and resistance, helping you identify problems with the PCB. The main way to test a PCB with a multimeter is to measure voltage, ‌ resistance, and ground. ‌

Measuring voltage

By measuring the voltage on the circuit board, ‌ can quickly test whether the circuit is working properly. Use the voltage gear of the multimeter, ‌ select the appropriate range, ‌ then measure the input and output of the power supply on the circuit board respectively, ‌ to check whether the voltage is within the normal range. If the voltage is abnormal, ‌ may indicate that the circuit is open or short. ‌

Measuring resistance value

By measuring the resistance value on the circuit board, can detect whether the circuit is smooth. Use the resistance level of the multimeter, select the appropriate range, then measure the key nodes on the circuit board, check whether the resistance value is within the normal range. If the resistance value is abnormal, may indicate that the circuit is open or short. ‌

Check the grounding

Grounding is critical to the proper operation of the circuit board. Use the multimeter’s ground test function, to check that key points on the board are properly grounded, ‌ this helps to spot potential electrical connection problems. ‌

In addition, for industrial-grade PCB measurement, the use of higher-precision multimeters and special pens can improve the accuracy and efficiency of the measurement. ‌ For example, the ‌ Fluke 17B Max multimeter is equipped with an extra-pointed stylus, enables more accurate measurement of patch components and pins, and ‌ improves measurement fineness and accuracy.

Generally speaking, using a multimeter to test the PCB board needs to master the correct measurement methods and skills. At the same time according to the complexity of the circuit board to choose the appropriate measurement tools, to ensure the accuracy and efficiency of the test.

How to Tell if a Circuit Board is Bad?

Identifying a bad circuit board requires a combination of visual inspection and multimeter testing. Here are some signs and methods to determine if a PCB is faulty:

Visual Signs

Look for burnt components, discolored areas, or broken traces, such as somewhere became black or be burned obviously. These are clear indicators of damage.

Component Testing

Use the multimeter to test individual components. A component that doesn’t show the expected resistance or voltage is likely faulty.

Continuity Testin

Check for open circuits. Lack of continuity in a path indicates a broken trace or solder joint.

Short Circuit Detection

Identify any unintended connections between different paths. This can be done by checking for continuity where there should be none.

Functionality Testing

Test the circuit board in its intended application. If the device does not function correctly, there may be an issue with the PCB.

Why Choose Best Technology?

By reading this post, you may know how to test a PCB by multimeter already and other methods to identify them. Best Technology has engaging in the PCB manufacturing for more than 18 years, we have served over 2000+ customers all around the world. We have strong R&D team and equipped with advanced equipment to improve the yield and product quality.

At Best Technology, we provide various PCB manufacturing, including metal core PCBs, ceramic PCBs, rigid-flex PCBs and some other special PCBs like HDI PCB, busbar PCB, heavy copper PCB. If you have similiar projects, you are welcome to contact us.

Posted in best pcb, bestpcb, Ceramic PCB, FAQ, FR4 PCB, HDI PCB, mcpcb, Metal Core PCB, PCB News, PCB Technology | No Comments »

What are thick and thin film ceramic circuit boards used for?

August 1st, 2024

Thick film and thin film technologies for ceramic circuit boards each have their specific uses. The application of thick film technology is mainly concentrated in areas that require high reliability and high performance, such as the automotive field, consumer electronics, communications engineering, medical equipment, aerospace, etc.

The application of thin film technology focuses on products that require specific optical, electrical, chemical and thermal properties, such as reflective coatings, optical recording media, insulating films, anti-oxidation, sensors, optoelectronic device heat sinks, etc. The following will introduce the uses and differences of thick film and thin film one by one.

What is a thick film ceramic circuit board used for?

Thick film ceramic circuit board is a kind of circuit board made by thick film technology, which is widely used, mainly for electrical connection, component mounting and surface modification.

What are thick and thin film ceramic circuit boards used for?

Electrical connection

Thick film circuit board can effectively connect all parts of the circuit to ensure the smooth transmission of current.

Component mounting

It can bear and fix electronic components, and ensure the correct position and stable operation of components in the circuit.

Surface modification

Through thick film technology, the surface of the circuit board can be modified to improve its electrical performance and durability. ‌

In addition, the thick film ceramic circuit board has some specific advantages, such as its manufacturing method allows it to be manufactured independently without using a substrate, and its thickness is usually between 10 and 25 μ m. This technology can be manufactured independently without using a substrate, which provides greater design flexibility. However, there may be some limitations in the accuracy of thick-film ceramic circuit boards. For example, in the process of using screen printing technology, the line width and accuracy may be insufficient due to the problems of screen printing, which may gradually lose the accuracy advantage for heat sinks with smaller and smaller size requirements in the future.

What is a thin film ceramic circuit board used for?

Thin film ceramic circuit boards are mainly used in module components of microwave circuits, including thin film load, thin film equalizer, thin film power divider, thin film attenuator, thin film coupler and thin film bridge. ‌

1. Thin film load is often used to match the terminals of module components of microwave circuits to absorb redundant incident power. It is designed with alumina ceramic substrate, which has the advantage of high precision machining.

2. Thin-film equalizer is used to adjust the broadband power flatness of microwave circuits. By changing the square resistance of the integrated tantalum nitride film and designing different resistance values, the output waveform of the device is adjusted to achieve the balance of power signals.

3. Thin film power divider is used in multi-channel communication network system, which distributes power according to a certain proportion, and one input can be multi-output, thus avoiding the problem of unstable patch resistance welding of microstrip power divider.

4. Thin film attenuator is used for large signal attenuation or multi-gear adjustment attenuation value in microwave RF module, which realizes high attenuation value flatness of ultra-wideband and stable performance.

5. Thin-film couplers are used for power detection or signal separation, and can be designed as couplers with any weak coupling degree. tantalum nitride design is used to integrate isolated loads, which is suitable for broadband applications.

6. As a part of microwave module, thin film bridge is used for specific circuit connection and signal processing. ‌

According to these applications, we can better understand the wide application and advantages of thin-film ceramic circuit boards in the fields of high frequency, high power and high integration.

What are the advantages of thick film over thin film ceramic PCB?

Thick film ceramic circuit boards have higher mechanical strength and thermal conductivity than thin film ceramic circuit boards, and are more suitable for power electronics, automotive electronics and other occasions that require higher thermal management and mechanical strength. ‌

The main difference between thick-film ceramic circuit board and thin-film ceramic circuit board lies in their film thickness and manufacturing process. The thickness of thick film circuit board is generally greater than 10μm, while that of thin film circuit board is mostly less than 1μ m.. Thick film circuit board usually adopts screen printing process, while thin film circuit board adopts vacuum evaporation, magnetron sputtering and other process methods.

This difference in technology leads to their differences in performance and application fields. Specifically, the advantages of thick film ceramic circuit boards are mainly reflected in the following aspects:

Reliable performance

Thick film circuits are flexible in design, low in investment and cost, and are mostly used in high voltage, high current and high power occasions.

High mechanical strength

Due to the use of thick film materials, thick film ceramic circuit boards have high mechanical strength and can withstand greater physical pressure and impact.

Good thermal conductivity

Thick-film ceramic circuit boards have good thermal conductivity, which is conducive to rapid heat dissipation, and is particularly important for electronic equipment that needs good thermal management. ‌

Therefore, thick film ceramic circuit boards are more suitable for applications that require high mechanical strength and good thermal conductivity, such as power electronics, automotive electronics and other fields.

What is the difference between thick film and ceramic resistors?

There are some differences between film resistance and ceramic resistance in materials, manufacturing technology, size and shape, electrical properties and application scenarios. ‌

1. Materials and manufacturing process: Thick film resistors are usually made by screen printing process and spraying or sputtering on the circuit substrate. The commonly used substrate materials are ceramics, glass and so on. The ceramic resistor is a resistance device made of ceramic material, which is fired in a ceramic kiln. ‌

2. Size and shape: Thick film resistors are usually flat, can be made into various sizes and shapes, and are suitable for assembly on circuit boards. Ceramic resistors are usually cylindrical and have a fixed size and shape. ‌

3. Electrical performance: Thick film resistor has high resistance accuracy and stability, and small temperature coefficient. Ceramic resistors have larger power carrying capacity and higher withstand voltage. ‌

4. Application scenario: Thick film resistor is suitable for high-precision circuits because of its large resistance range and good temperature stability. Ceramic resistors are suitable for general circuits and small electronic devices because of their small size and general electrical properties. ‌

From this, we can know that thick film resistors and ceramic resistors are different in materials, manufacturing processes, sizes and shapes, electrical properties and application scenarios, which make them suitable for different electronic equipment and circuit design requirements.

‌‌Thick film technology and thin film technology have certain substitutability in some fields, but thick film technology has irreplaceable role in the manufacturing and related processes of many products due to its advantages in cost, reliability, high temperature performance, etc., especially in multi-layer co-sintering processes such as LTCC and HTCC, where thin film technology cannot be applied. As a professional ceramic substrate manufacturer, Best Technology is committed to providing customers with high-quality thick film and thin film ceramic substrates to meet the needs of different applications.‌‌

Tags: ceramic circuit board, thick film ceramic resistor, thick fim ceramic pcb
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What is a heavy copper PCB?

July 31st, 2024

Heavy Copper Board does not have a set of definition per IPC. According to PCB industry, however, peopel generally use this name to identify a printed circuit board with copper conductors 3 oz/ft2 – 10 oz/ft2 in inner and/or outer layers. And Extreme heavy copper PCB refers to 20 oz/ft2 to 200 oz/ft2 printed circuit board.

Heavy copper normally used for a various products but not limited to: high power distribution, heat dissipation, planar transformers, power convertors, and so on.

Generally, the thick copper plate is about 3oz, and the larger current is 3oz~6oz. To achieve 15 ounces, the requirements for process and manufacturers are more stringent. Best provides 3-15oz 1-99 layers of PCB. It is a professional PCB manufacturer with 18 years of experience, providing one-stop PCB and PCBA services from design, manufacturing to after-sales.

Common copper foil thicknesses have the following options:

1 oz (35 μm): This is the most common and standard copper foil thickness, widely used in general electronic product manufacturing. It has good electrical and thermal conductivity.
2 oz (70 μm): This thickness of copper foil is usually used in circuits that require higher current carrying capacity, such as power amplifiers, high-power LEDs, etc.
0.5 oz (18 μm): This thinner copper foil thickness is suitable for some light and small electronic products, such as electronic watches, mobile phones, etc.
Other thicknesses: According to special needs, you can also choose copper foil of other thicknesses, such as 3 oz, 4 oz, etc.

What is copper foil

Copper foil is a cathodic electrolytic material, a thin, continuous metal foil deposited on the substrate layer of the circuit board, which serves as the conductor of the PCB. It is easy to adhere to the insulating layer, accept the printed protective layer, and form a circuit pattern after corrosion. The copper mirror test is a flux corrosion test, using a vacuum precipitation film on a glass plate. Copper foil is made of copper and a certain proportion of other metals. Copper foil generally has two types: 90 foil and 88 foil, that is, the copper content is 90% and 88%, and the size is 16*16cm.

How thick is the PCB copper foil

The commonly used international PCB copper foil thicknesses are: 35um, 50um, and 70um.
Generally, the thickness of copper foil (copper cladding) of single-sided and double-sided PCB boards is about 35um (1.4mil), and the other specifications are 50um and 70um.
The surface thickness of multilayer boards is generally 35um=1oz (1.4mil), and the inner layer is 17.5um (0.7mil). 70% of circuit boards use a copper foil thickness of 35um, which mainly depends on the purpose of the PCB and the voltage and current of the signal; in addition, for PCBs that need to pass large currents, some will use 70um copper thickness, 105um copper thickness, and rarely 140um, etc. The copper foil thickness is usually expressed in oz (ounces). 1oz refers to the thickness of 1oz of copper evenly covering an area of 1 square foot, which is about 1.4mil. It uses the weight per unit area to express the average thickness of the copper foil.
Expressed in formula, that is, 1oz=28.35g/ FT2 (FT2 is square feet, 1 square foot = 0.09290304 square meters).

Different uses have different copper foil thicknesses,

Ordinary 0.5oz, 1oz
2oz, mostly used in consumer and communication products.
Thick copper products above
3oz are mostly used for large currents, such as high-voltage products and power boards!

Copper foil thickness (track width) affects the current size. Although there is a formula that can directly calculate the current load capacity of copper foil, it is not so simple when actually designing the circuit. Therefore, safety should be fully considered when designing.

How thick is 2 oz of copper for PCB?

In the PCB industry, 1OZ means the thickness of 1OZ of copper evenly laid on an area of 1 square foot (FT2). It uses the weight per unit area to express the average thickness of the copper foil. Expressed in formula, 1OZ=28.35g/FT2 (FT2 is square feet, 1 square foot=0.09290304 square meters).
First, we know that the density constant of copper and the conversion formula of related units are as follows:
1 cm = 10 mm; 1 mm = 1000 um
1 FT2≈929.0304cm2
According to the mass calculation formula m=ρ×V(volume)=ρ×S(area)×t(thickness), we know that the weight of copper foil divided by the density and area of copper is the thickness of copper foil!
So, t=28.35÷929.0304÷8.9cm≈0.0034287cm=34.287um≈34.287÷25.4mil≈1.35mil
Copper thickness 1.OZ(0.035mm) Copper thickness 1.5OZ(0.05mm) Copper thickness 2.OZ (0.07mm)

What are the materials of PCB board

FR-1——phenolic cotton paper, this base material is commonly known as bakelite (more economical than FR-2)
FR-2——phenolic cotton paper
FR-3——cotton paper, epoxy resin
FR-4——glass cloth, epoxy resin
FR-5——glass cloth, epoxy resin
FR-6——matte glass, polyester
G-10——glass cloth, epoxy resin
CEM-1——cotton paper, epoxy resin (flame retardant)
CEM-2——cotton paper, epoxy resin (non-flame retardant)
CEM-3——glass cloth, epoxy resin
CEM-4——glass cloth, epoxy resin
CEM-5——glass cloth, polyester
AIN——aluminum nitride
SIC——silicon carbide

Tags: heavy copper pcb, PCB
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How to Clean Flux Off PCB? – Best Technology

July 31st, 2024

Flux is usually a mixture of rosin as the main component and is an auxiliary material to ensure the smooth progress of the PCB soldering process. Soldering is the main process of PCB assembly, flux is the auxiliary material used in soldering. The main function of flux is to remove the oxide of the solder and the base metal surface to be welded, so that the metal surface to achieve the necessary cleanliness.

Flux prevents the reoxidation of the surface during welding, reduces the surface tension of the solder, and improves the welding performance. The performance of flux directly affects the quality of electronic products. There are different types of solder paste flux, including rosin-based, water-soluble, and no-clean flux. Each has its specific applications and cleaning methods.

Types of Flux

Rosin Flux

This is one of the most commonly used fluxes in soldering. It includes activated rosin flux (RMA), which contains additional chemicals for enhanced cleaning of oxides, and non-activated rosin flux (RA), which offers basic cleaning for general purposes. Rosin flux is effective at preventing oxidation and improving solder flow, making it suitable for a wide range of electronic soldering applications.

Water-Soluble Flux

This type of flux uses water-soluble chemicals to provide strong cleaning action. It is easily removed with water, making it ideal for applications where thorough residue removal is necessary. Water-soluble flux is often used in automated soldering processes where post-soldering cleanup is a key concern.

No-Clean Flux

Designed to leave minimal, non-corrosive residue, no-clean flux does not require cleaning after soldering. This type of flux is beneficial in situations where cleaning is difficult or impractical, as it reduces post-soldering processing time while ensuring that the residue does not affect the performance of the PCB.

Organic Acid Flux

Contains organic acids like citric or formic acid, providing effective cleaning and fluxing. While it offers strong fluxing action, it is more corrosive compared to rosin fluxes. Organic acid flux is used in applications requiring robust cleaning, with careful consideration of the corrosion risk.

Solder Paste Flux

This flux is a combination of flux and solder powder, used in reflow soldering processes. It is commonly employed in surface-mount technology (SMT), where the paste is applied to PCB pads before component placement and reflow. Solder paste flux streamlines the soldering process by integrating fluxing and soldering into one step.

Is it Bad to Leave Flux on PCB?

There is obvious that leaving flux residue on a PCB surface can lead to several issues. Flux residues can attract moisture, resulting in corrosion of metal traces and component leads, which can compromise the integrity of the PCB over time. Some flux residues are conductive, potentially causing short circuits and affecting signal integrity, especially in high-frequency applications. Even no-clean flux can leave residues that impact sensitive components. Cleaning flux off the PCB can make sure the optimal performance and reliability of the overall product.

How to Remove Flux After Soldering?

We know leaving the flux on the PCBA surface is not a good thing, so how to remove it? Here we listing some common methods that manufacturers will used after soldering. Hope this information is helpful for you!

Isopropyl Alcohol (IPA)

Use high-purity IPA (90% or higher). Apply it to the flux residue with a brush or cotton swab, gently scrubbing the area to dissolve the flux. IPA evaporates quickly and is effective for most flux types.

Water Washing

Water washing is a common and straightforward cleaning method. It uses pure or deionized water to remove flux residues. This technique is simple, cost-effective, and easy to implement. However, water washing can potentially harm some PCBs and components if moisture accumulates on pads and pins, leading to short circuits or corrosion.

Solvent Cleaning

Solvent cleaning is an efficient method that dissolves flux residues using chemical solvents. The solvent is then rinsed or sprayed off to clear the flux. While this method provides rapid and effective cleaning, solvents can be costly and require careful handling due to their chemical properties and safety considerations.

Ion Cleaning

Ion cleaning is a high-tech approach that uses ion beams to clean the surface of PCBs. The high-energy and high-speed ion beams effectively remove contaminants and flux residues without damaging the PCB or components. However, ion cleaning equipment is expensive and requires specialized technology and support.

Oxidation Cleaning

Oxidation cleaning is a physical cleaning method where oxidizing agents convert flux residues into easily removable substances. This technique is suitable for PCBs and components that are not compatible with water or solvent cleaning. The cost of oxidizing agents can be high, and safety precautions are necessary due to their reactive nature.

Dry Ice Cleaning

Dry ice cleaning uses CO2 dry ice pellets as the cleaning medium. This method is efficient, environmentally friendly, and does not produce secondary pollution. During cleaning, high-speed CO2 dry ice pellets impact the flux residues on the PCB surface. The extremely low temperature of the dry ice causes the flux residues to become brittle, allowing them to be easily removed without damaging the PCB. This method offers a thorough cleaning solution while preserving the integrity of the circuit board.

FAQs

1. Can I use vinegar to clean flux off a PCB?

Vinegar can be used to clean certain types of flux, but it’s not as effective as IPA or specialized flux removers. It’s best to use a solvent designed for flux removal.

2. How often should I clean my PCB?

Clean your PCB after every soldering session to prevent residue buildup and ensure optimal performance.

3. Is it safe to use a hairdryer to dry a PCB after cleaning?

Yes, but use the lowest heat setting to avoid damaging sensitive components. Ensure the PCB is completely dry before powering it on.

4. Can I use a toothbrush for cleaning flux?

A toothbrush can be used, but a brush with anti-static properties is recommended to prevent static damage to the PCB.

5. Is no-clean flux really safe to leave on a PCB?

While designed to be left on, no-clean flux can still leave residues that may affect sensitive components. It’s best to clean it off for maximum reliability.

All in all, cleaning flux off your PCB is a crucial step to keep the reliability of your product. Remember, a clean PCB is a reliable PCB. Choose the right solvent, follow proper cleaning techniques, and your electronics will thank you with years of flawless performance.

For high-quality PCB & PCBA solutions and expert advice, choose Best Technology. We have more than 18 years in this field. Our commitment to excellence ensures your projects are in good hands. Contact us today to learn more about our products and services.

Tags: Solder paste, soldering
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Design and Application of PVD in DPC Manufacturing Process

July 29th, 2024

With the increasing demand of electronic devices working in high temperature environment, DPC (Direct-Plated Copper) ceramic PCB has been widely used as a heat dissipation material with strong high temperature stability and high thermal conductivity. This paper discusses the design and application of DPC ceramic substrate from the aspects of material, structure and technology.

Material Selection of DPC Ceramic PCB

It is very important to select ceramic substrate with good high temperature stability and high thermal conductivity. Commonly used ceramic materials are Al2O3, AlN, Si3N4 and so on. Taking Al2O3 as an example, its thermal conductivity is as high as 24~30W/(m·K), and the coefficient of thermal expansion is about 8.2×10^-6/℃, which is similar to the coefficient of thermal expansion of most chips. The ceramic layer on the surface of the substrate should be smooth and uniform, and have good adhesion, oxidation resistance, wear resistance and corrosion resistance.

Design and Application of PVD in DPC Manufacturing Process

The heat dissipation performance of DPC ceramic substrate is one of the key factors affecting its work in high temperature environment. In order to test the heat dissipation performance of DPC ceramic substrate, thermocouple temperature measurement, infrared temperature measurement, thermal imager and other testing methods can be used. The experimental results show that the DPC ceramic substrate has good heat dissipation performance and can effectively heat dissipation and reduce the influence of temperature on electronic devices.

DPC Ceramic PCB Structure Design

The structure design of DPC ceramic substrate includes the thickness of copper foil, the size of aperture, the layout of copper foil and the thickness of ceramic substrate. The choice of copper foil thickness should be determined according to heat dissipation requirements and chip power density and other parameters.

There are two layout methods of copper foil, one is fully plated surface; The other is local copper, that is, only the copper foil is laid in the area around the chip. The local copper laying method can reduce the copper foil area and reduce the cost, but the adhesion between the copper foil and the substrate needs to be higher. The thickness of the ceramic substrate also needs to be selected according to the specific application requirements.

PVD Process of DPC Ceramic PCB

Direct Plating Copper (DPC) is a ceramic circuit processing technology developed on the basis of ceramic film processing. In this process, the copper metal composite layer is sputtered on the ceramic substrate by vacuum coating, and then the circuit is made by re-exposure, development, etching and film removal with the photoresistance of yellow light microshadow. Finally, the thickness of the circuit is increased by electroplating/electroless deposition, and the metallized circuit is made after the photoresistance is removed.

The process is the process of vaporizing metal materials (titanium and copper) into molecules and then forming a metal film on the surface of a ceramic substrate. The main process includes cleaning the surface of the substrate, heat treatment of the ceramic substrate, preparation of the target of metal materials, DPC of the target, measurement of film thickness and surface treatment. Among them, heat treatment can improve the thermal stability and adhesion of the ceramic substrate, and ensure that the covered copper foil will not peel off in high temperature environment.

DPC ceramic substrate small size, precision structure, high reliability requirements, complex process flow, fine production process, belongs to technology-intensive industries, with high technical barriers. Its production process mainly involves drilling, magnetron sputtering, chemical copper deposition, copper plating, solder resistance printing, chemical silver/chemical gold deposition and other main processes

Application of DPC Ceramic PCB

a. VCSEL package

The power density of VCSEL is very high, and the DPC ceramic circuit board has a high thermal expansion coefficient matching with VCSEL, so as to solve the stress problem caused by the mismatch of thermal expansion between chip and substrate. The DPC ceramic circuit board makes the metal edge closely combined with the ceramic substrate, avoiding the additional paste process, coordination accuracy and other problems in the later assembly process, as well as the reliability problems caused by the aging of the glue. The ceramic circuit board of DPC film technology almost meets the packaging requirements of VCSEL.

b. IGBT package

The insulated gate bipolar transistor has become the mainstream of the development of power semiconductor devices due to its high input impedance, fast switching speed, low on-state current and high blocking voltage. Its applications are as small as frequency conversion air conditioning, silent refrigerator, washing machine, induction cooker, microwave oven and other household appliances, and as large as electric locomotive traction system. Due to the high output power and high heat output of IGBT, heat dissipation is the key for IGBT packaging. At present, the DPC ceramic substrate is mainly used for IGBT packaging, because the DPC ceramic substrate has the characteristics of large metal layer thickness, high bonding strength (good thermal impact) and so on.

c. LED package

Throughout the development of LED technology, the power density continues to improve, and the requirements for bracket heat dissipation are becoming higher and higher. DPC ceramic substrate has high insulation, high thermal conductivity and heat resistance, low expansion and other characteristics, especially the use of through hole interconnection technology, well meet the LED flip, eutectic, COB (chip on board), CSP (chip scale package), WLP (wafer package) packaging needs, suitable for medium and high power LED packaging.

In conclusion, the design and application of DPC copper-coated ceramic substrate need to consider many factors, and a lot of experiments and data analysis are required. The performance and reliability of DPC ceramic substrate at high temperature can be improved by selecting suitable materials and designing reasonable structure and process, and the high temperature application of microelectronic devices can be guaranteed.

The advent of DPC ceramic substrate products opens the development of heat dissipation application industry. Due to the heat dissipation characteristics of the ceramic substrate, it has the advantages of high heat dissipation, low thermal resistance, long life and voltage resistance. With the improvement of production technology and equipment, the rationalization of product prices is accelerated, and the application field of LED industry is expanded.

Tags: dpc ceramic pcb
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led light circuit board

July 26th, 2024

The led light circuit board, also called the LED circuit board, is actually the abbreviation of the printed circuit board (PCB). PCB is a stable carrier of electronic components, which not only realizes electrical connection, but also plays a supporting role. In LED lamps, the PCB board integrates LED components, and through this integrated PCB board, the LED lamp can realize its function. The driving circuit of the LED lamp, such as constant voltage drive, constant current drive, PWM drive, etc., are all integrated on this small circuit board, which is necessary to light up the LED lamp beads. Therefore, it can be said that the circuit board of the LED lamp is the printed circuit board inside it, which is responsible for converting electrical energy into visible light, and controlling the brightness and performance of the LED through different driving methods.

Customized process of led light circuit board

Support small and medium batch orders of 1-14 layers, consult customer service for more layers;
Can do HDI blind buried hole process;
The board uses Jiantao A-grade board (KB-6164), which can be made into halogen-free board;
The maximum size can be one meter;
Various ink colors such as pink, transparent, purple, etc.;
Support copper thickness of 10oz, hole copper 35μm;
Multi-layer board can be customized with pressing structure;
Support multi-level impedance matching;
Board edge copper package, two-color ink, plug hole, countersunk hole, square groove, stepped hole, stepped groove, nickel palladium gold and other special processes;
PCBA can be pasted in one set, single and double sides can be pasted;

led light circuit board

What fields can led light circuit board be applied in?

PCB LED lamp has excellent energy efficiency, low cost and maximum design flexibility, so it can be incorporated into many lighting applications.

Telecommunications: LED indicators and displays are always used in telecommunications equipment due to the surrounding machinery, and they have great heat transfer capabilities. Therefore, aluminum-based LED PCBs play an important role in their applications.
Automotive: Aluminum PCB LEDs are also used in the indicator lights, brake lights, and headlights of automobiles, among other applications. There are factors that make aluminum PCBs ideal in the automotive industry, such as durability and competitive pricing.
Computers: LED displays and indicator lights are becoming increasingly popular in computer applications. Aluminum PCB LEDs are an ideal solution due to the heat sensitivity of computer machinery. In addition to LED applications, aluminum PCBs are also used in computer components such as power supply units and CPU boards due to their ability to dissipate and transfer heat.
Medical: Lighting tools used in surgical procedures and medical examinations often use high-power LED lights, which often use aluminum PCBs, mainly because of the durability and heat transfer capabilities of aluminum PCB LEDs – this ensures that medical equipment operates properly, regardless of the number of patients that are cycled through the medical office. In addition to lighting tools, medical scanning technology also often uses aluminum PCBs.

What fields can LED PCB be applied in?

Advantages of led light circuit board

Lower power consumption: Replacing incandescent lamps with LED lamps can reduce power consumption by more than 80%.

Longer life: The service life of LEDs can generally exceed 20,000 hours, and they can be used around the clock for 3 years, which is 25 times longer than incandescent lamps. Not only can it save costs, but it also reduces the frequency of replacement.

Higher efficiency: Incandescent lamps release more heat. LED lamps can reduce it by up to 20%. This means that while using more powerful LED lamps, unnecessary heating can be reduced.

Smaller size: Due to their small size, LED lamps can have various sizes and can be used in different places. Manufacturers can add LEDs to anything, whether it is electronic equipment or cars, and even traffic lights and signs on the road.

Environmental protection: Compared with other bulbs, LED lamps do not contain mercury. Therefore, LEDs have less impact on the environment and are easier to handle.

LED is the abbreviation of light-emitting diode, which is a semiconductor diode. LEDs are soldered to a printed circuit board and equipped with a chip that generates light through electrical connections. A heat sink and a ceramic base are used to connect the chip. Undoubtedly, LED PCB is the core of LED lighting. An LED PCB tends to generate a lot of heat, but it is difficult to cool it by traditional methods. Metal core PCB is widely used in LED applications due to its strong heat dissipation ability, especially aluminum is often used in the production of PCB for LED lamps. Usually, aluminum PCB contains a thin layer of thermal conductive medium material, which can transfer and dissipate heat much more efficiently than traditional rigid PCB.

Why led light circuit board use mcpcb

Aluminum substrate is a metal-based copper-clad board with good heat dissipation function. Generally, a single-sided board consists of three layers, namely circuit layer (copper foil), insulation layer and metal base layer. There are also designs for high-end use as double-sided boards, with the structure of circuit layer, insulation layer, aluminum base, insulation layer and circuit layer. Very few applications are multi-layer boards, which can be made of ordinary multi-layer boards with insulation layer and aluminum base.
LED aluminum substrate is PCB, which also means printed circuit board, but the material of the circuit board is aluminum alloy. In the past, our general circuit board material was glass fiber, but because LED generates more heat, the circuit board used for LED lamps is generally aluminum substrate, which can conduct heat quickly. The circuit boards used for other equipment or electrical appliances are still glass fiber boards!

How are LED patches installed on PCB boards?

Use double-sided PCB board, patch LED on the front, and drive power circuit on the back. LED can be designed into a circle shape, through metallized holes to the back, there are plenty of places to handle these leads
On the corresponding pads of PCB board, brush tin, use patch machine to apply it, and then reflow soldering, it is on, but in actual operation, you need to pay attention to many problems, anti-static, equipment quality, etc.

Tags: LED, LED aluminum pcb, LED circuit board, LED flexible PCB, LED light
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Dry Soldering: How to Prevent and Fix Dry Solder Joint?

July 25th, 2024

It’s essential to ensure that solder joints are made correctly in any electronics construction. Poor and dry soldering cause equipment not to work once. Or there is a possibility that the solder joint could fail. In this blog, we will introduce why dry soldering occurs and how to solve it.

What is Meant by Dry Soldering?

Dry soldering refers to a poor solder joint that lacks proper electrical connectivity on a PCB assembly product. This issue occurs when the solder does not properly melt and bond to the components, leading to weak connections. These joints are often brittle and prone to failure, which can result in intermittent or complete loss of electrical connectivity.

Dry Soldering: How to Prevent and Fix Dry Solder Joint?

Why Dry Solder Joint Causes?

Dry solder joints occur due to several reasons, each impacting the quality of the solder connection. First of all, the solder paste reflow process is only a small area, which is easier to harden than the solder paste in the solder paste can. At this time, the solder paste will not melt, and the flux cannot cover the solder joint, resulting in poor welding of the solder joint. Meanwhile, the solder paste is easier to heat transfer, and the high temperature actually makes the solder paste not easy to melt, so we can slightly adjust the reflow welding temperature curve to solve the problem, or welding in a nitrogen environment is basically a good way to solve this problem.

Secondly, the solder paste does not melt because its own composition contains a very volatile flux, which is also the reason why the solder paste is easy to harden. Among them, the flux with the largest content of solder paste is rosin, rosin contains a lot of rosin acid, rosin acid is easy to lose activity at too high temperature. Therefore, the temperature of the welding process should be controlled to ensure that the temperature is about 200 ° C, which is not suitable for too high or too low. At the same time, the quality of thixotropic agent will also lead to the solder paste is easy to dry, the quality of thixotropic agent is not good will affect the viscosity of the solder paste, the viscosity of the solder paste is easy to dry. Therefore, the choice of high-quality solder paste can fundamentally solve the problem that the solder paste is easy to harden.

In addition, the use of solder paste scene, humidity, temperature and other external factors will also affect the solder paste in the use of hard non-melting phenomenon. So these external factors should be paid attention to. I hope these solutions can solve your problems.

How Do You Fix Dry Solder?

Solder paste is one of the very important materials in the electronics industry, and it has an important impact on the production quality of the entire component. Here are some tips that can help to fix the dry solder paste.

1.Add flux

Usually, if the solder paste is too dry, you can try to add some water to the right amount of flux, stir well and add it to the solder paste. This can play a certain role in alleviating drying and improve the fluidity of the solder paste.

2. Take some measurements during management

a. Keep the ambient temperature moderate during storage;

b. Stir well before use;

c. Cover the solder paste in time after welding to avoid exposure to the air.

3. Replace it with new one

If the solder paste becomes too dry, adding flux is difficult to restore its original properties, it is recommended to replace the solder paste to avoid affecting the quality of the components.

Therefore, we need to regularly maintain and manage the solder paste to ensure that its quality meets the standard requirements.

What Does a Dry Solder Look Like?

Recognizing a dry solder joint is crucial for proper diagnosis and repair. Unlike a good solder joint, which is shiny and smooth, a dry joint looks matte and rough. The joint might have visible cracks or look brittle. It might not be fully bonded to the component lead or the PCB pad. Identifying these visual cues can help in quickly addressing the issue.

How Do You Prevent Dry Solder?

Preventing dry solder joints is key to maintaining the reliability of your electronic projects. You can try to use these tips to prevent your solder paste become dry.

Proper heating
Clean surfaces
Use quality solder
Steady hand
Maintain equipment
Fast usage and storage

If you want to know more about solutions of dry solder paste, you can read our another post, How to Solve Dry Solder Paste.

How to Tell If Solder is Bad?

Bad solder can lead to dry joints and other issues. So, how can we identify if my solder paste is bad? May you can follow these points. If everything matches up, there’s no doubt that your solder paste is broken.

Appearance of solder joints

Bad solder joints often appear dull or matte instead of shiny and smooth. They may also show cracks or a brittle texture, indicating poor bonding or excessive heating. These visual signs suggest that the solder did not properly melt or flow.

Solder flow and coverage

If the solder does not adequately cover the component leads or PCB pads, or if it spreads unevenly, it is likely bad. Proper soldering should result in a well-formed, consistent fillet around the leads, ensuring reliable electrical connections.

Difficulty in melting

Solder that requires unusually high temperatures or takes a long time to melt may be old or contaminated. Proper solder should melt easily at the recommended temperature and flow smoothly to create a solid joint.

Contamination indicators

Oxidized or tarnished solder indicates contamination and can affect its performance. Excessive residue or debris also points to poor quality, affecting how well the solder adheres and flows.

Best Technology is a one-stop PCB manufacture and PCBA service provider, our SMT factory is equipped with more than 6 assembly lines. Meanwhile, we have automatic SPI machine and solder paste printing machine, with good management system, we can ensure the good quality of solder paste. In addition, there are many advanced equipment in our workshop, including online dual AOI, X-ray, Nitrogen reflow oven, dry-ice cleaning machine, and so on.

Trust us, we are the one of most reliable PCBA manufacturer in China and Vietnam. Contact us for more.

Tags: dry soldering, Solder paste
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What is a Zero PCB Board? – Best Technology

July 24th, 2024

A zero PCB, also known as a prototype PCB or breadboard, is a type of circuit board used for building and testing prototypes. Unlike traditional PCBs, which have pre-defined paths for electric connections, zero PCBs offer a grid of holes. This grid allows for custom circuit designs using wires and components. Engineers and hobbyists use zero PCBs to experiment and develop new electronic circuits without committing to a specific design.

What is a zero PCB?

Zero PCBs are particularly helpful in testing circuit designs for any shortcomings. They provide a cost-efficient way to evaluate the circuitry before committing to a final solution. The term ‘zero’ in this context signifies a fundamental distinction. It implies that there are no predefined connections, layouts, or functions on the PCB.

Generally, there is no solder mask and silkscreen on the zero board. The primary purpose of a zero PCB is to offer a blank canvas for users to create and test custom circuits. As a result, they are intentionally kept simple in structure to allow for maximum customization. Users are free to design and solder their circuits and components directly onto the board without the constraints of a predefined layout or solder mask.

What is the use of a zero board?

Zero boards serve a variety of purposes in the electronics industry. They are particularly useful for prototyping and testing new circuit designs. Here are some common uses:

Prototyping
Educational purposes
Quick fixes
Small-scale production

Zero PCBs have a layer of copper traces or pads on the substrate. These copper elements provide the conductive pathways for soldering electronic components and forming connections. However, the copper traces on zero PCBs are usually unconnected, meaning there is no predefined circuit layout. You can build a circuit on them by inserting components into the holes and then connecting them with wires.

What is the cost of a zero PCB board?

The cost of zero PCB boards varies based on size, material, and supplier. Generally, they are quite cost-effective, so that both professional engineers and hobbyists can afford it. Prices can range from a few cents for small boards to several dollars for larger or more specialized versions. Bulk purchasing often reduces the cost per unit. Additionally, different materials, such as fiberglass or phenolic, can affect the price.

What size is a zero PCB board?

Zero PCB boards come in various sizes to accommodate different project needs. Common sizes include:

Small: Typically around 5×7 cm, ideal for simple projects.
Medium: Sizes like 10×15 cm offer more space for complex circuits.
Large: Boards as large as 30×30 cm are available for extensive projects.

The grid pattern usually remains consistent, with a standard pitch of 2.54 mm (0.1 inches) between holes, regardless of the board’s overall size.

What is a bare board?

A bare board, also known as a blank PCB, is a printed circuit board that has not yet been populated with any electronic components. It is essentially the foundation of a PCB, consisting only of the substrate material (such as fiberglass) and the copper traces that form the circuit pathways. A bare board typically include base core, prepreg and copper trace layer.

Features of a bare board

Substrate material

The base material of a bare board is usually fiberglass, FR4, or other insulating materials that provide mechanical support.

Copper traces

These are the conductive pathways etched onto the substrate. They form the circuit’s electrical connections but are not yet connected to any components.

Pads and holes

Bare boards include pads (flat areas of copper for soldering components) and drilled holes for through-hole components.

Pre-defined layout

The copper traces and pads are arranged according to a specific design, determined during the PCB design process.

No components

A bare board does not have any electronic components soldered onto it yet. It is essentially a “blank slate” ready to be populated.

Coated solder mask and silkscreen

Most bare boards have a solder mask, a protective layer that prevents solder from bridging between conductive areas, and a silkscreen, which provides component labels and other information.

If you are looking for a reliable supplier for your PCB needs, consider companies like Best Technology, who is known for their quality and customer service. Best Technology offers a range of options to support your electronic projects from prototyping to production. Contact us right now to get your quotation.

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