Patent ID: 8900908
Filing Date: 2014-12-02
Classification: H01L,Y02E,Y02P

Abstract:
1. A method for local high-doping and contacting of a semiconductor structure, representing a solar cell or a precursor of a solar cell and comprising a silicon-semiconductor substrate ( 1 ) of a base doping type, with high-doping and contacting occurring by generating several local high-doping areas of the base doping type in the semiconductor substrate ( 1 ) at a contacting side ( 1 a ) of the semiconductor substrate and applying a metallic contacting layer ( 7 ) on the contacting side ( 1 a ) or one or more intermediate layers covering the contacting side ( 1 a ) partially or entirely, in order to form electrically conductive connections between the metallic contacting layer ( 7 ) and the semiconductor substrate ( 1 ) at the high-doping areas, the method comprises the following steps: A generating a layer structure covering the contacting side ( B locally heating the layer structure and a surface of the semiconductor substrate located thereunder at several zones to form local high-doping areas, with the local heating here occurring such that at the locally heated high-doping areas locally a molten mixture develops respectively comprising at least the doping layer ( C applying the metallic contacting layer (