Optimizing process method of screen printing screen plate

Abstract

The invention discloses an optimizing process method of a screen printing screen plate. The method is used for printing a silicon wafer of a solar cell. The method includes that a layer of cleaning agents is coated on the surface of a screen plate with a hole, the screen plate is washed, dust or impurities in the hole of the screen plate are removed, the screen plate after being cleaned is wiped clean, the screen plate after being cleaned is installed on a printing machine, the screen plate is placed on a layer above the layer where the silicon wafer is located, slurry which is well mixed in advance is filled in the surface of the silicon wafer through the hole of the screen plate to be printed into the pattern of an electrode of the solar cell, and the silicon wafer with the slurry is sintered to enable the slurry and the silicon wafer to form alloy. Therefore, gate broken and other bad printing occasions occurring in screen plate printing are reduced, printing quality of the screen plate is improved, and the qualified rate of the appearance of the solar cell is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to an optimized processing method for a screen printing screen. Background technique [0002] A solar cell, also known as a photovoltaic cell, is a semiconductor device that directly converts the sun's light energy into electrical energy. Because it is a green and environmentally friendly product, it will not cause environmental pollution, and it is a renewable resource, so in today's energy shortage situation, solar cells are a promising new energy source. [0003] At present, the production technology of crystalline silicon solar cells is basically mature and stable. The basic process flow is as follows, including the following steps: [0004] S1, chemical cleaning surface structure treatment: remove the mechanical damage layer on the surface of the silicon wafer, and form an uneven structure on the surface of the originally bright silicon wafer through chemical reaction to i...

AI Technical Summary

Problems solved by technology

[0011] However, the level of purification room for solar cell production is generally not high at present, and there will be a small amount of dust and small particles during the placement of the screen plate, which will cause the mesh to be blocked

Such a screen will have poor printing conditions such as broken grids during use, resulting in unqualified appearance of many solar cells

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