Patent ID: 9397155
Filing Date: 2016-07-19
CPC Classification: H01L

Claim Text:
1. A silicon carbide semiconductor device comprising: a silicon carbide layer including a first main surface and a second main surface located opposite said first main surface, said silicon carbide layer being made of hexagonal silicon carbide of polytype 4H and having a first conductivity type; an element region including a semiconductor element portion formed in said silicon carbide layer; a first electric field relaxing region having a second conductivity type different from said first conductivity type, said first electric field relaxing region being disposed in said silicon carbide layer so as to be in contact with said first main surface of said silicon carbide layer and so as to surround said element region when viewed two-dimensionally; an insulating film disposed on said first main surface and covering said first electric field relaxing region; and an electrode electrically connected to said first electric field relaxing region, said electrode including an extension portion extending from an end of said first electric field relaxing region close to said element region in a peripheral direction from said element region toward said first electric field relaxing region, said extension portion being disposed on said insulating film, said extension portion overlying at least a portion of said first electric field relaxing region.