Patent ID: 8872193

Claim:
A silicon carbide semiconductor device, comprising: a substrate of a first conductivity type composed of silicon carbide and having a first principal surface and a second principal surface which is an opposite surface to the first principal surface; an epitaxial layer composed of silicon carbide and formed on the first principal surface of the substrate; a body layer of a second conductivity type different from the first conductivity type formed in the epitaxial layer from a surface of the epitaxial layer; a source region formed in the body layer from the surface of the epitaxial layer spaced apart from an end portion of the body layer; a channel region formed in the body layer from the surface of the epitaxial layer between an end portion of the body layer and the source region; a gate insulating film formed in contact with the channel region; a gate electrode formed in contact with the gate insulating film; and a drain region of the first conductivity type formed in the substrate from the second principal surface of the substrate, wherein the source region includes: a first source region of the first conductivity type; and a second source region of the first conductivity type formed in contact with the first source region between an end portion of the body layer and the first source region spaced apart from the end portion of the body layer, and the channel region includes; a first channel region of the second conductivity type formed in contact with the second source region between an end portion of the body layer and the second source region spaced apart from the end portion of the body layer; and a second channel region formed in contact with the first channel region between an end portion of the body layer and the first channel region.