Patent ID: 9117836
Filing Date: 2015-08-25
Classification: H01L

Abstract:
1. A silicon carbide semiconductor device comprising: a silicon carbide semiconductor layer formed over a silicon carbide substrate; a metal silicide layer formed over the silicon carbide semiconductor layer except over a first region of the silicon carbide semiconductor layer; a contact plug formed over the metal silicide layer in a second region of the silicon carbide semiconductor layer; an anti-oxidation film for the metal silicide layer formed over the metal silicide layer except the second region where the contact plug has been formed, the anti-oxidation film extending so as to cover an edge of the metal silicide layer; a silicon oxide film formed over the anti-oxidation film; a gate electrode of a MOSFET formed in the first region; a gate insulating interface layer formed on the silicon carbide semiconductor layer; a gate insulating film disposed at a distance from the edge of the metal silicide layer, and formed between the gate insulating interface layer and the gate electrode; and a drain electrode of the MOSFET disposed on a surface of the silicon carbide substrate which is opposite the surface where the silicon carbide semiconductor layer is formed.