Patent ID: 7960738
Filing Date: 2011-06-14
Classification: H01L

Abstract:
1. A bipolar semiconductor device including: a substrate which is to serve as a collector and in which a surface having a specified off-angle within a range of 2 to 10 degrees from a (000-1) carbon surface of a crystal of a first-conductive-type silicon carbide semiconductor whose base material is silicon carbide, which is a compound of carbon and silicon, is formed; a drift layer which is formed on a crystal growth surface of the substrate at a specified film growth rate by epitaxial growth of a silicon carbide, where the surface of the substrate having said specified off-angle is taken as the crystal growth surface of the substrate; a first-conductive-type grown layer formed on the drift layer; a second-conductive-type emitter layer formed on the first-conductive-type grown layer; a contact region formed by ion implantation into the first-conductive-type grown layer via a through hole formed in the second-conductive-type emitter layer; and a gate electrode formed via an insulating film on the first-conductive-type grown layer and the second-conductive-type emitter layer.