Patent ID: 9680006
Date: 2017-06-13
CPC Classifications: H01L

Claim:
1. A silicon carbide semiconductor device, comprising: a silicon carbide layer having a first main surface and a second main surface opposite to said first main surface, said silicon carbide layer including said second main surface of said silicon carbide layer being provided with a trench having a depth in a direction from said second main surface toward said first main surface, said trench having a sidewall portion where said second layer and said third layer are exposed and a bottom portion continuing to said sidewall portion, where said first layer is exposed; a gate insulating film covering each of said sidewall portion and said bottom portion; and a gate electrode provided on said gate insulating film, in said direction of depth of said trench, a position of said bottom portion of said trench being located on a side of said second main surface relative to a site located closest to said first main surface in a region where said second layer and said first layer are in contact with each other, or located as deep as said site in said direction of depth wherein said bottom portion of said trench includes a bottom surface extending in a direction crossing said sidewall portion, said trench has a corner portion at a boundary portion between said bottom surface and said sidewall portion, and said corner portion is located in said second layer.