Patent ID: 7535025

Claim:
A silicon carbide semiconductor device comprising: a singlecrystalline silicon carbide substrate; a field insulating film formed by a method including a thermal oxidization on a surface of the singlecrystalline silicon carbide substrate; an insulating film formed on the surface of the singlecrystalline silicon carbide substrate of an opening opened to the field insulating film and thermally processed during its formation or after its formation; a gate electrode formed on a part of the insulating film which provides a gate insulating film; a gate electrode side surface insulating film formed by thermally oxidizing a part of a member of the gate electrode; and a metal electrode that is another than the gate electrode, is contacted with the singlecrystalline silicon carbide substrate, and is treated with a predetermined heat process at a temperature which is lower than a temperature of the thermal oxidization of the insulating film and is sufficient to carry out a contact annealing between the singlecrystalline silicon carbide and a metal after a whole surrounding of the gate insulating film is enclosed with the singlecrystalline silicon carbide substrate, the field insulating film, the thermally processed insulating film, the gate electrode, and the gate electrode side surface insulating film.