Patent ID: 8828790

Claim:
A method for local contacting and local doping of a semiconductor layer, comprising the following processing steps: A) creating a layer structure on the semiconductor layer by i) applying at least one intermediate layer ( 9 , 10 , 11 ) on one side of the semiconductor layer, and ii) applying at least one metal layer ( 12 ) on the intermediate layer ( 11 ) applied last in the step i., with the metal layer at least partially covering a last applied the intermediate layer ( 11 ), B) locally heating the layer structure such that in a local area briefly a melt-mixture is formed of at least sections comprising the layers: the metal layer ( 12 ), the at least one intermediate layer ( 9 , 10 , 11 ), and the semiconductor layer, and after solidification of the melt-mixture an electric contacting forms between the metal layer ( 12 ) and the semiconductor layer, wherein in step A) i), at least one of the intermediate layers applied comprises a doping layer ( 10 ), which includes a dopant, with the dopant showing greater solubility in the semiconductor layer than the metal of the metal layer; and in step B, a locally high doping develops in the area of the electric contact between the metal layer and the semiconductor layer due to the dopant wherein the doping layer ( 10 ) has a layer resistance which is greater than a layer resistance of the metal layer ( 12 ) by at least a factor of 10 and wherein an additional intermediate layer ( 9 ) is applied between the semiconductor layer and the doping layer ( 10 ) such that a passivation of a boundary area between the semiconductor layer and the additional intermediate layer is formed.