Patent ID: 6165822
Filing Date: 2000-12-26
Classification: H01L

Abstract:
A method of manufacturing a silicon carbide semiconductor device, comprising steps of:forming an n type semiconductor layer from silicon carbide on an n type silicon carbide semiconductor substrate to have a resistance larger than that of the n type semiconductor substrate;forming a p type base region in a specific surface portion of the n type semiconductor layer with a first depth;forming an n type surface channel layer on the n type semiconductor layer and on the p type base region;forming an n type source region in a specific surface portion of the p type base region with a second depth shallower than the first depth;forming a gate insulation film on the surface channel layer;performing a high temperature annealing treatment at a temperature equal to or higher than 1200.degree. C.;forming a gate electrode on the surface channel layer through the gate insulation film interposed therebetween; andforming a source electrode to contact the n type source region and the p type base region;forming a drain electrode on the n type silicon carbide semiconductor substrate on a side opposite the n type semiconductor layer.