Solar Cell Production Process

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1. Standard Solar Cell Production Process

                                           2. PERC Solar Cell Production Process
Wafer Clean：
Using acid or alkali liquid to do saw damage removal.
Texturing：
Using acid or alkali liquid to texture.
Diffusion：
High temperature vacuum tube process with (POCl3 ) gas to define positive/ negative electric junctions.
Wet Edge Isolation：
Using Acid liquid to remove SiO2 layer from wafer surface and doing isolation on wafer edge.
Chemical Vapor Deposition：
Chemical vapor deposition by tube to build anti-reflection layer (SiNx) on wafer surface.
Laser Opening：
The formation of a high-quality local back-surface-field (LBSF) using by laser opening. 
Screen Printing：
Screen printing the electrode pattern on both side with metal component paste.
Co-Firing：
Using high temperature heater to make cross-link between electrode and junction for electric current output.
Efficiency Test ：
Classify cells by surface visual inspection with AOI and electricity with IV-tester.

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