Patent ID: 9166040
Filing Date: 2015-10-20
Classification: H01L

Abstract:
1. A semiconductor device comprising: a source electrode; a gate electrode; a drain electrode; a first region of a first conductivity type formed in a range exposed at an upper surface of a semiconductor substrate, and making contact with the source electrode; a second region of a second conductivity type formed in a range exposed at the upper surface, adjacent to the first region, and facing the gate electrode through a gate insulating layer; a third region of the first conductivity type formed in a range exposed at the upper surface, and making contact with the drain electrode; and a fourth region of the first conductivity type formed in a range exposed at the upper surface, formed between the second region and the third region, and comprising: wherein both of the first drift region and the second drift region are adjacent to the third region, and the first drift region is projected to a second region side than the second drift region.