Patent ID: 7381993

Claim:
A semiconductor device comprising: a semiconductor substrate; a silicon carbide layer formed on the semiconductor substrate and having its top surface inclined at an angle of 10 degrees or less from a crystal plane in a miscut direction; a gate insulating film formed on the silicon carbide layer; a gate electrode formed on the gate insulating film; a source electrode formed on a part of the silicon carbide layer located to one side of the gate electrode; a drain electrode formed on a part of the silicon carbide layer located to the other side of the gate electrode; and source/drain regions formed apart from each other in regions of the silicon carbide layer located at least under the source and gate electrodes, wherein the opposed two of the edges of the source/drain regions extend along the direction perpendicular to the miscut direction in a plan view, and the semiconductor device contains a V-group element at the interface between the silicon carbide layer and the gate insulating film.