Patent ID: 8304282
Filing Date: 2012-11-06
Classification: H01L,Y02E

Abstract:
1. A method for manufacturing a solar cell, the method comprising: disposing a first doping layer on a substrate; forming a first doping layer pattern by patterning the first doping layer to expose a portion of the substrate; disposing a second doping layer on the first doping layer pattern to cover the exposed portion of the substrate; diffusing an impurity from the first doping layer pattern which forms a first doping region in a surface of the substrate; and diffusing an impurity from the second doping layer which forms a second doping region in the surface of the substrate, wherein the forming of the first doping layer pattern uses an etching paste, and wherein a thickness of a side wall of the first doping layer pattern decreases with proximity to a boundary of the exposed portion of the substrate in the forming of the first doping layer pattern.