Printed circuit board screen printing process

1. Definition

Screen printing has its own unique printing effect. The production of printed circuit is a kind of high precision in the screen printing process.

What is screen printing? In other words, a screen is used as a plate material to form an image and a plate mold on the plate. The plate mold portion prevents the printing material from passing through, and the image portion is scraped and printed on the printing plate by the squeegee so that the printing material is printed on the substrate. The printing method. Of course, the reputation of printing is the same as this principle, the difference is that the reputation of writing does not use screen printing. Dyeing and printing are the same as screen printing. The image copying process is also almost the same, except that printing and dyeing do not use printing materials but use printing paste.

Taking into account the above aspects, we define the definition of screen printing, so to speak: “The printing plate is made of plate material, and the graphic part of the screen plate can be copied through the printing material to the substrate. The technology is called screen printing.

2, the characteristics of screen printing

Screen printing is widely used in the manufacture of printed circuits and thick-film integrated circuits, and has become an indispensable part of the electronic components manufacturing industry. Compared with other manufacturing methods, screen printing has the following features:

It can produce large batch production, and at the same time, it can realize the industrial structure of automation.

There are many kinds of printing materials, which can adapt to various kinds of coatings, such as anti-electroplating coating, anti-welding coating, and text coating.

Easy to make, easy to understand, and low cost.

The coating thickness is thick, usually between 10-30μm, so the coating has very high weather resistance and chemical resistance.

The screen printing is poor.

The road has poor reproducibility, and it is easy to show jaggies when the screen is printed with wires below 0.1 mm, and the quality of the lines is poor.

Source: PCB Information Network