Patent ID: 7947988
Filing Date: 2011-05-24
Classification: H01L

Abstract:
1. A semiconductor device comprising: a silicon carbide substrate having a first major surface and a second major surface; a first silicon carbide layer of a first conductivity type provided on the first major surface of the silicon carbide substrate; a second silicon carbide layer of a second conductivity type provided on the first silicon carbide layer; a first silicon carbide region and a second silicon carbide region provided in a surface region of the second silicon carbide layer, opposed to each other and spaced apart by a prescribed distance, and having the same depth; a third silicon carbide region of the first conductivity type extending through the first silicon carbide region and reaching the first silicon carbide layer; a gate insulating film formed on the first silicon carbide region, the second silicon carbide region and that part of the second silicon carbide layer which lies between the first silicon carbide region and the second silicon carbide region; a gate electrode formed on the gate insulating film; a first contact region of the first conductivity type formed on a surface of the second silicon carbide region; a second contact region of the second conductivity type formed on a surface of the second silicon carbide region, reaching the second silicon carbide layer through the second silicon carbide region; a first main electrode formed on the first contact region and the second contact region; and a second main electrode formed on the second major surface of the silicon carbide substrate.