Patent ID: 6452228
Filing Date: 2002-09-17
Classification: H01L

Abstract:
A silicon carbide semiconductor device comprising:an n type semiconductor substrate made of silicon carbide and having a main surface and a back surface on an opposite side of the main surface; an n type semiconductor layer provided on the main surface of the n type semiconductor substrate and made of silicon carbide having a resistance larger than that of the n type semiconductor substrate; a p type base region provided in a specific surface portion of the n type semiconductor layer with a first depth; an n type source region provided in a specific surface portion of the p type base region with a second depth shallower than the first depth of the p type base region; an n type surface channel layer provided on the p type base region to connect the n type source region and the n type semiconductor layer therethrough, and made of silicon carbide including nitrogen with a concentration equal to or less than 1Ã—1015 cmâˆ’3; a gate insulation film provided on the n type surface channel layer; a gate electrode provided on the gate insulation film; a source electrode provided in contact with the p type base region and the n type source region; and a drain electrode provided on the back surface of the n type semiconductor substrate.