With the continuous development of screen printing technology, new screen printing materials, processes, and testing equipment used in the PCB industry are continuously being perfected, making current screen printing technology suitable for high-density PCB production. The application of screen printing in PCB manufacturing mainly includes the following three aspects:
Given the technical difficulties involved in the first two applications, this article will provide targeted introductions to them, while also briefly discussing screen printing materials used in the PCB process.
1. Wire Mesh
The screen is the most crucial component of a screen printing plate as it controls the fluidity and printing thickness of ink, impacts screen durability, and is extensively used in quality switch manufacturing technology. The successful combination of the screen with screen photosensitive material is also vital for creating high-quality, high-precision screen printing plates. To ensure a good bond between the screen and photosensitive material, the traditional method involves roughening and degreasing the new screen, which enhances screen quality and prolongs screen lifespan.
2. Printing Plate Photosensitive Material
Commonly used photosensitive materials for printing plates include diazo sensitizers and photosensitive films. Diazo emulsions are typically used in the production of screen printing screens. Photosensitive film offers benefits such as uniform and controllable film thickness, high resolution, high definition, wear resistance, and strong adhesion to the screen, making it widely used for character printing on printed boards.
3. Screen Frame
The material and cross-sectional shape of the screen frame are crucial. If the strength of the screen frame is insufficient compared to its size, tension consistency cannot be guaranteed. Currently, high-tensile aluminum mesh frames are commonly used.
As screen printing technology continues to advance, it plays an increasingly important role in the printed circuit manufacturing industry. Its application not only enhances production efficiency and reduces costs but also improves the quality of printed circuit board processing. Furthermore, with ongoing research, development, and application of screen printing materials, particularly functional inks, the scope of screen printing applications has diversified and expanded. Examples include silver paste printing in membrane switch manufacturing technology, stencil manufacturing of solder paste in SMT manufacturing technology, and the application of PCB strippable ink.
Given the technical difficulties involved in the first two applications, this article will provide targeted introductions to them, while also briefly discussing screen printing materials used in the PCB process.
1. Wire Mesh
The screen is the most crucial component of a screen printing plate as it controls the fluidity and printing thickness of ink, impacts screen durability, and is extensively used in quality switch manufacturing technology. The successful combination of the screen with screen photosensitive material is also vital for creating high-quality, high-precision screen printing plates. To ensure a good bond between the screen and photosensitive material, the traditional method involves roughening and degreasing the new screen, which enhances screen quality and prolongs screen lifespan.
2. Printing Plate Photosensitive Material
Commonly used photosensitive materials for printing plates include diazo sensitizers and photosensitive films. Diazo emulsions are typically used in the production of screen printing screens. Photosensitive film offers benefits such as uniform and controllable film thickness, high resolution, high definition, wear resistance, and strong adhesion to the screen, making it widely used for character printing on printed boards.
3. Screen Frame
The material and cross-sectional shape of the screen frame are crucial. If the strength of the screen frame is insufficient compared to its size, tension consistency cannot be guaranteed. Currently, high-tensile aluminum mesh frames are commonly used.
As screen printing technology continues to advance, it plays an increasingly important role in the printed circuit manufacturing industry. Its application not only enhances production efficiency and reduces costs but also improves the quality of printed circuit board processing. Furthermore, with ongoing research, development, and application of screen printing materials, particularly functional inks, the scope of screen printing applications has diversified and expanded. Examples include silver paste printing in membrane switch manufacturing technology, stencil manufacturing of solder paste in SMT manufacturing technology, and the application of PCB strippable ink.
