Patent ID: 9337185
Filing Date: 2016-05-10
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a first doping region extending from a main surface of a semiconductor substrate into the semiconductor substrate, wherein the first doping region comprises a first conductivity type; a second doping region arranged adjacent to the first doping region, wherein the second doping region comprises a second conductivity type, wherein the first doping region comprises at least one low doping dose portion extending from the main surface of the semiconductor substrate to the second doping region, wherein a doping dose within the low doping dose portion of the first doping region is less than 3 times a breakdown charge; a first electrode structure in contact with the first doping region at the main surface of the semiconductor substrate, wherein the work function of the first electrode structure at the main surface of the semiconductor substrate is larger than 4.9 eV or lower than 4.4 eV; and a second electrode structure in contact with the second doping region.