Patent ID: 8941121
Filing Date: 2015-01-27
Classification: H01L

Abstract:
1. A silicon carbide semiconductor device comprising: a silicon carbide layer having a first surface and a second surface opposite to each other in the thickness direction, said silicon carbide layer including a first region constituting said first surface and of a first conductivity type, a second region provided on said first region so as to be apart from said first surface by said first region, and of a second conductivity type differing from said first conductivity type, a third region provided on said second region, isolated from said first region by said second region, and of said first conductivity type, and a fourth region provided in said first region, located away from each of said first surface and said second region, and of the second conductivity type, and a gate insulation film provided on said second region to connect said first region with said third region, a gate electrode provided on said gate insulation film, a first electrode provided beneath said first region, and a second electrode provided on said third region, wherein the first region includes a base portion on the side of the first surface and a cover portion on the side of the second region, the base portion and said cover portion are disposed apart from each other in the thickness direction, and the fourth region is disposed between the base portion and the cover portion.