Patent ID: 8629505
Filing Date: 2014-01-14
Classification: H01L

Abstract:
1. A semiconductor device comprising: a drain layer of a first conductivity type; a drift layer of the first conductivity type provided on the drain layer; a base region of a second conductivity type provided on the drift layer; a source region of the first conductivity type selectively provided on a surface of the base region; a first gate electrode provided in each of a plurality of first trenches via a first insulating film, the first trenches penetrating from a surface of the source region through the base region and contacting the drift layer; a field-plate electrode provided in the first trench under the first gate electrode via a second insulating film; a second gate electrode provided in a second trench via a third insulating film, the second trench penetrating from the surface of the source region through the base region and contacting the drift layer between the first trenches; a drain electrode connected to the drain layer; and a source electrode connected to the source region and the base region.