When all the steps are finished, then we are able to go to Sample making and ready to volume production. If you have any questions about the last step, click here to know more details: Conductive ink preparation

1.Fixing the ceramic substrate on the base by fixing the two adjacent sides of the substrate. The holes in the operating platform is connected to the air compressor, so that the air between the substrate and the operating platform will be removed after the substrate put up, then the substrate can be firmly fixed on the operating platform without moving.

2、Align the locations of the stencil and the substrate.

3、Putting the ink on the stencil.

4、 Make the sample
The squeegee material is generally polyamine rubber or fluorinated rubber and the shore hardness is A70°～A80. Besides, we should consider what kind of pattern to be printed on the circuit when we choose the outline and the hardness of the squeegee. Generally speaking, the edge of the squeegee is 90°or 60° and the squeegee angle is 70°to 75°. When it comes to the printing machine for thick film integrated circuits, there are three types included, manual, semi-automatic and fully automatic.

Manual printing machine

Substrate after printing

The Automatic Printing Machine

The sample after printing

The picture below is the cylindrical substrate printing. The substrate is put on a rotating shaft and rotates with the scraper on it. There is a contact surface between the cylinder and the stencil, which is relatively flat, so that the scraper can print the conductor onto the cylinder evenly.

The Cylindrical Substrate Printing

Ink Printing

5、Checking the printing quality
The product is placed under a 10-20 times microscope for inspection, and simple products can be inspected after put at the top of the light source from bottom. The printing quality can be found when the light passes through the bottom of the ceramic substrate, trace opening/shorting issue can be found out easily.

Check using microscope

Using the bottom light source to check

Here we finished Sample making, then we can move to the Spreading, drying and over the firing oven , so that ink can be combined with ceramic substrate