Patent ID: 8502305
Filing Date: 2013-08-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer of a first conductive type; a base region of a second conductive type provided on the semiconductor layer; a first contact region of a second conductive type provided on the base region; a gate electrode provided via a gate insulating film in a trench piercing through the first contact region and the base region and reaching the semiconductor layer; an interlayer insulating film provided on the gate electrode and containing a first conductive type impurity element; a source region of a first conductive type provided between the interlayer insulating film and the first contact region, the source region being in contact with a side face of the interlayer insulating film and extending in the base region; a first major electrode electrically connected to the semiconductor layer; and a second major electrode provided on the interlayer insulating film and connected to the source region and the first contact region.