Printing screen for solar cell and method for producing solar cell

Abstract

The invention discloses a printing screen for a solar cell and a method for producing the solar cell. The printing screen for the solar cell comprises a printing screen frame part, a polyester mesh part and a printing part, wherein the polyester mesh part is connected with the printing screen frame part and the printing part; the printing part is a meshed metal sheet; and mesh openings on the meshed metal sheet are evenly arranged in a matrix shape. The invention also discloses a method for producing the solar cell. The method comprises the step of using the printing screen for the solar cell to produce the solar cell. In the process of the producing the solar cell, the printing screen is utilized to print metal electrodes of the solar cell, thus not only prolonging the service life of the printing screen and reducing the production cost, but also keeping graphs required by the solar cell printed through using a silk-screen printing technology unchanged and controlling the width of electrodes accurately, thus improving the product quality.

Description

technical field [0001] The invention relates to the field of solar cell manufacturing, in particular to a printing screen plate for solar cells and a method for producing solar cells. Background technique [0002] In the solar cell manufacturing process, the screen printing process is a very critical connectivity process. Its main function is to print various patterns (metal layers) required for solar cells, such as conductive metal electrodes (positive and negative electrodes). [0003] If the printing accuracy of the screen printing process does not meet the requirements, the solar cell will become waste, so the selection of the printing screen is extremely important. Compared with elastic polyester mesh, steel mesh has the characteristics of finer wire diameter, more meshes, better wear resistance, high strength, stable size, low stretchability, and good ink passing performance, so it is suitable for screen printing for the production of solar cells. craft. However, the...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the metal paste tends to be more and more high-viscosity in terms of characteristics, in the case of continuous printing, due to the sharp drop in the tension of the steel mesh, it is easy to be distorted and deformed, resulting in deformation of the printed graphics, and the printing screen needs to be replaced more frequently, increasing In addition, in the current production of solar cells, in order to increase the effective light absorption area of ​​the silicon wafer to improve the conversion efficiency, the width of the electrodes (main grid lines and auxiliary grid lines) of the battery is getting thinner and thinner. Deformation makes it difficult to precisely control the width of the electrode;

[0006] 2. The twisting and deformation of the steel mesh makes there is a big difference between the newly replaced printing screen and the printing screen printing graphic that is about to reach the end of its service life, which affects the product quality, and the intermediate products obtained in this way are also easy to process in other subsequent processes. quality problem

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