Crystalline silica solar energy cell PECVD rainbow film reworking method
A technology for solar cells and silicon solar cells, which is applied in the directions of cleaning methods, cleaning methods and utensils, chemical instruments and methods using liquids, etc., which can solve the problem of difficulty in cleaning, the influence of the surface flatness of silicon wafers, the influence of silk screen printing and the qualified products. rate, etc.
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[0019] The first step is to use HF solution to remove normal Si from the cell 3 N 4 membrane;
[0020] The specific process of the first step is:
[0021] A. Mix HF and pure water according to the volume ratio of 12:100 into HF conventional cleaning solution;
[0022] B. Put the PECVD reworked film into HF solution to remove normal Si 3 N 4 membrane;
[0023] C. Rinse with deionized water.
[0024] The second step: Deeply clean the rainbow-shaped foreign matter remaining on the silicon wafer with a high-efficiency cleaning fluid to completely remove it.
[0025] The specific process of the second step is:
[0026] A, H 2 O:HF:HNO 3 According to the volume ratio of 60:100:1, it is formulated into a high-efficiency cleaning solution. H 2 The volume ratio of O is 60, the volume ratio of HF is 100, HNO 3 The volume ratio is 1;
[0027] B. Put the cells after cleaning in the first step into a high-efficiency cleaning solution. With the aid of nitric acid, the remaining traces can be quickly a...
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