Method for eliminating screen printing edge bold lines and screen printing plate capable of eliminating edge bold lines

Abstract

The invention discloses a method for eliminating screen printing edge bold lines and a screen printing plate capable of eliminating the edge bold lines. The method for eliminating the screen printing edge bold lines comprises the steps that a graphic area is set on a screen frame, and raised layers are arranged on the screen frame located on the periphery of the graphic area. The screen printing plate capable of eliminating the edge bold lines comprises the screen frame with the graphic area, and the raised layers are arranged on the screen frame located on the periphery of the graphic area. Through the raised layers, the screen printing plate is on the same plane basically, the problem that a product is unqualified due to the fact that a grid line on the utmost edge becomes thicker in the printing process is solved, the method is easy to implement, and hardly any cost is increased.

Description

technical field [0001] The invention relates to a solar cell manufacturing method, in particular to a method for eliminating thick lines on the edges of screen printing and a screen capable of eliminating thick lines on the edges. Background technique [0002] There are various metallization methods for crystalline silicon solar cells, and the most common one is screen printing. The screen printing screens include traditional screens and steel screens. The screens used in the steel screen are 100% open-hole design. nickel expanded metal plate. However, if figure 1 and figure 2 As shown, in the metallization process of the existing screen, the screen 11 and the silicon wafer 12 are not on the same level, which causes the edge of the screen 11 to be deformed, so that the two outermost grid lines 13 are often printed thicker. Even rough to unacceptable, resulting in Figure 5 The product shown may become a defective product, and the above defects are difficult to solve by ...

AI Technical Summary

Problems solved by technology

However, if figure 1 and figure 2 As shown, during the metallization process of the existing screen, the screen 11 and the silicon wafer 12 are not on the same level, which causes the edge of the screen 11 to be deformed, so that the two outermost grid lines 13 are often printed thicker. Even rough to unacceptable, resulting in Figure 5 The product shown may become a defective product, and the above defects are difficult to solve by improving the printing process parameters

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