Patent ID: 8476733
Filing Date: 2013-07-02
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate including a principal surface and a reverse surface; a silicon carbide layer placed on the principal surface of the substrate, including a body region of a first conductivity type placed in a surface region of the silicon carbide layer, and a drift region of a second conductivity type; a channel layer of the second conductivity type formed by silicon carbide and placed on the body region and the drift region on a surface of the silicon carbide layer; a gate insulating film placed on the channel layer; a gate electrode insulated from the silicon carbide layer by the gate insulating film; a source electrode provided on the silicon carbide layer; and a drain electrode provided on the reverse surface of the substrate, wherein: the source electrode is in direct contact with the body region and the channel layer; and a second conductivity type impurity concentration on a surface of the silicon carbide layer that is in direct contact with the source electrode is less than or equal to a second conductivity type impurity concentration of the channel layer.