Patent ID: 7994571
Filing Date: 2011-08-09
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer; a drift region of a first conductivity type provided in the semiconductor layer; a body region of a second conductivity type provided on the drift region in the semiconductor layer; a trench extending from a surface of the body region in the semiconductor layer with its bottom located in the drift region; a gate insulation film provided on an interior surface of the trench; a gate electrode provided in the trench with the intervention of the gate insulation film; a source region of the first conductivity type provided in a surface layer portion of the body region; a first impurity region of the second conductivity type provided around the bottom of the trench in spaced relation from the body region; and a second impurity region of the second conductivity type provided on a lateral side of the body region in the semiconductor layer, the second impurity region being isolated from the body region and electrically connected to the first impurity region.