Patent ID: 7964915
Filing Date: 2011-06-21
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor layer of a first general conductivity type; a gate insulation film disposed on the semiconductor layer; a gate electrode disposed on the gate insulation film; a field plate covering part of the gate electrode; a source layer of a second general conductivity type formed in the semiconductor layer adjacent one end of the gate electrode; a body layer of the first general conductivity type formed in the semiconductor layer and extending under the gate electrode from the source layer; a first drift layer of the second general conductivity type formed in the semiconductor layer so as to provide a separation between the first drift layer and the gate electrode in plan view of the semiconductor device, an end of the first drift layer being located in a center portion between an end of the gate electrode and an end of the field plate; and a second drift layer of the second general conductivity type formed in the semiconductor layer so as to be located under substantially all of the first drift layer, extend under the gate electrode and form a junction with the body layer under the gate electrode, wherein the gate insulation film, the first drift layer and the second drift layer are stacked in this order in a thickness direction of the semiconductor layer.