Technical application of high-precision thick film printing technology in graphite sheet glue coating

Graphite sheet is a thin sheet material made of graphite. Its unique grain orientation can conduct heat uniformly in both directions. At the same time, it also has excellent electrical conductivity and light material quality. It is widely used in heat dissipation solutions in the fields of electronics, communications, lighting, aviation and national defense military industry to help effectively conduct heat away from the heat source. In order to meet the ups and downs of electronic devices and circuit modules, certain processing is usually required, such as printing glue on the back of the graphite sheet to make it fit better and play a heat dissipation function. Thick film printing technology, as a printing method with high precision, high efficiency and low cost, is a key technology for graphite sheet glue coating. Because the graphite sheet is very light and the glue has a certain viscosity, the problem of sticking to the plate often occurs during the printing process, resulting in low printing efficiency and poor film thickness uniformity. So how to solve this problem? Let's take the 100*100mm graphite sheet thick film printing as an example and take a look.

1. Using the high-precision thick film screen printer IC-200A, the pressure printing can be precisely controlled. That is, the suspension device is used to eliminate the deadweight of the printing system. Under the same stroke, the printing pressure threshold can be precisely controlled, and the minimum pressure threshold can be adjusted to 300g/cm².

2.Using a customized ceramic platform, the adsorption force is strong without damaging the substrate.

3. Adjust process parameters, such as screen spacing, printing speed, printing pressure, scraper downward stroke , etc.

1 ) Maximum printing area: 200*200mm.

2 ) Platform: Ceramic adsorption platform, good adsorption, not easy to cause substrate breakage.

3 ) The printing stroke adopts servo drive and high-precision imported linear guide rails to keep the ink scraper at a constant speed and stable state. After the overall debugging and verification of the system, the uniformity of the printed coating is effectively guaranteed, and the film thickness deviation is ±5%.

4 ) The printing table adopts a servo drive system, which has excellent stability and durability.

With the continuous growth of electronic equipment technology, the application scope of graphite sheets will continue to expand, and the market prospects will be broader. Thick film screen printing companies will increase their innovation and research and development efforts to provide more complete printing process solutions for the field of graphite thick film printing.