Patent ID: 9379216
Filing Date: 2016-06-28
CPC Classification: H01L

Claim Text:
1. A semiconductor device, comprising: a first electrode; a second electrode facing the first electrode; a first semiconductor layer of a first conductivity type, the first semiconductor layer being provided between the first electrode and the second electrode; a second semiconductor layer of a second conductivity type, the second semiconductor layer being provided between the first electrode and the first semiconductor layer; a gate electrode provided in the second semiconductor layer, an end of the gate electrode on a side of the second electrode being located in the first semiconductor layer, another end of the gate electrode on a side of the first electrode protruding from the second semiconductor layer toward the first electrode; a first insulating film provided between the gate electrode and the first electrode; a third semiconductor layer of the first conductivity type, the third semiconductor layer being provided on the second semiconductor layer; and a second insulating film provided between the gate electrode and each of the first semiconductor layer, the second semiconductor layer and a part of the third semiconductor layer, wherein the third semiconductor layer extends along the second insulating film and the first insulating film in a first direction toward the first electrode from the second electrode, and a width of the third semiconductor layer decreases along the first direction.