Patent ID: 9653620
Date: 2017-05-16
CPC Classifications: H01L

Claim:
1. A semiconductor device comprising: a p or p+ doped portion; an n or n+ doped portion separated from the p or p+ doped portion by a semiconductor drift portion; an insulating portion provided adjacent the drift portion and at least one of the doped portions in a region where the drift portion and said at least one doped portion meet; and at least one additional portion, wherein said at least one additional portion is located such that, when one of said doped portions and said at least one additional portion are biased at substantially the same electrical potential, electrical potential lines leave said semiconductor drift portion homogeneously, and when said one of said doped portions is biased at a first non-zero potential and said at least one additional portion is biased at a second non-zero potential, the second potential being different from the first potential, electrical potential lines leave the semiconductor drift portion inhomogeneously.