Patent ID: 8680608

Claim:
A power semiconductor device, comprising: a first semiconductor layer of a first conductivity type; a second semiconductor layer of the first conductivity type and a third semiconductor layer of a second conductivity type provided on the first semiconductor layer of the first conductivity type, the second semiconductor layer disposed alternately with the third semiconductor layer in a first direction on a plane parallel to a surface of the first semiconductor layer; a first main electrode electrically connected to the first semiconductor layer; a fourth semiconductor layer of the second conductivity type provided on a surface of the third semiconductor layer; a fifth semiconductor layer of the first conductivity type selectively provided on a surface of the fourth semiconductor layer; a second main electrode provided on the surface of the fourth semiconductor layer and a surface of the fifth semiconductor layer; a control electrode provided via a gate insulating film on the surface of the fourth semiconductor layer, the surface of the fifth semiconductor layer, and a surface of the second semiconductor layer; and a plurality of first insulating films provided in the second semiconductor layer, each first insulating film separated from each other first insulating film by a portion of the second semiconductor layer.