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Method for forming metal contact on a surface of a solar cell covered by an anti-reflective coating (ARC) layer

 

A method for forming metal contact on a surface of a solar cell covered by an anti-reflective coating (ARC) layer is provided. The method comprises masking the ARC layer with a removable self-adhesive polymer sheet, engraving the electrical contact pattern on the polymer sheet by a laser beam having a wavelength in the range of (10,000 – 11,000 nm), the laser beam of said wavelength range etching the polymer sheet for exposing regions of the ARC layer corresponding to the electrical contact pattern, wet chemical etching of the solar cell for etching the exposed regions of the ARC layer to form the electrical contact pattern on the surface, and subjecting the solar cell to metallization process for deposition of metal on the electrical contact pattern formed on the surface.

Indian patent application no. 3506/MUM/2010

Inventors: Chetan Singh Solanki, Vikrant Ashok Chaudhari