Manufacturing method of knotless screen printing plate suitable for SE solar battery piece printing

Abstract

The invention provides a manufacturing method of a knotless screen suitable for SE solar battery piece printing. According to the manufacturing method, the knotless screen printing plate and the SE solar battery are perfectly combined, the advantages of the solar battery piece are brought into full play, the photoelectric conversion efficiency of the battery piece is better improved, after the prefabricated semi-finished product is free of the knotless screen printing plate, the digital comparison of the scanning screen printing plate image and the actual etching groove drawing paper is carried out, a production drawing corresponding to the overlapping part of the screen mesh and the etching groove on the screen is obtained, and then the laser cutting equipment is used for removing the screen mesh on the semi-finished mesh-free screen printing plate according to a production drawing used for cutting, so as to obtain a corresponding knotless screen printing plate.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a method for making a knotless screen suitable for printing SE solar cells. Background technique [0002] Knotless screen is currently on the market, the most used solar crystal silicon cell printing screen. However, with the emergence of SE solar cells, due to the shortcomings of the product itself, the no-knot screen plate cannot meet the needs of the production process of SE solar cells for the time being. [0003] SE solar cell is a selective diffusion cell, which has two characteristics, 1. Form a highly doped deep diffusion area in the contact area of ​​​​the thin grid line (below and near the thin grid line); 2. Form a low-doped area in the illuminated area shallow diffusion zone. By selectively doping the emitter region, the effects of different diffusion square resistances are realized in the gate line contact region and other regions, and the series resistance is ...

AI Technical Summary

Problems solved by technology

[0009] At present, the production principle of the knotless screen plate needs to determine the graphic according to the radial mesh trend of the screen plate. In order to avoid the overlapping of the mesh wire and the fine grid lines, the distance between the fine grid lines cannot be guaranteed to be completely accurate during the process of generating graphics. Consistent, the SE process requires that the pattern of the screen plate and the groove engraved by the laser completely match, otherwise the cells will have black hearts, and the production without network knots is congenitally insufficient and cannot adapt to the SE process

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