Patent ID: 8501586
Filing Date: 2013-08-06
Classification: H01L

Abstract:
1. A method for producing a high-voltage power semiconductor for operation at high blocking voltages of greater than 2000 V comprising a drift layer having a doping of a first charge carrier type, a first stop layer having a doping of the first charge carrier type, and an electrode of a second charge carrier type, wherein the doping of the first stop layer is higher than the doping of the drift layer the method for producing the power semiconductor comprising: proceeding from a lightly doped layer of a first charge carrier type, a medium-doped layer is produced at one side of the lightly doped layer to form the first stop layer, and the remaining part of the lightly doped layer forms the drift layer; and indiffusing the electrode is into one of the drift layer and first stop layer, which has the highest doping of the layers of the first charge carrier type, wherein after the production of the medium-doped layer and before the production of the electrode, at a side of the medium-doped layer which is remote from the lightly doped layer, producing a highly doped layer to form a second stop layer, wherein the doping of the highly doped layer is higher than the doping of the medium-doped layer, and metallizations are applied after the indiffusion of the electrode.