Patent ID: 8610132

Claim:
A semiconductor device, comprising: a semiconductor substrate having a trench formed in one main surface; a first insulating film arranged on and in contact with a wall surface of said trench; a gate electrode arranged on and in contact with said first insulating film; and a first interconnection arranged on said one main surface, said semiconductor substrate including a drift layer having a first conductivity type, and a body layer having a second conductivity type, which is arranged on a side of said one main surface when viewed from said drift layer, said trench being formed to penetrate said body layer and to reach said drift layer, said trench including an outer peripheral trench arranged to surround an active region when viewed two-dimensionally, a potential fixing region where said body layer is exposed being formed in said one main surface opposite to said active region when viewed from said outer peripheral trench, said first interconnection being arranged to lie over said active region when viewed two-dimensionally, and said potential fixing region being electrically connected to said first interconnection.