Patent ID: 8450796

Claim:
A power semiconductor device, comprising: a semiconductor layer; a gate electrode for controlling a current flowing through said semiconductor layer; a gate insulating film electrically insulating said semiconductor layer and said gate electrode from each other; a conductor portion provided on said semiconductor layer and electrically connected with said semiconductor layer; an interlayer insulating film provided on said gate electrode such that said conductor portion is electrically insulated from said gate electrode; a continuous buffer insulating film directly contacting a partial region of said conductor portion and a partial region of said interlayer insulating film and made of an insulator; and an electrode layer having a wiring portion located on a region from which said conductor portion is exposed, and a pad portion located on said continuous buffer insulating film, wherein said gate electrode is a trench gate, and wherein an end portion of said continuous buffer insulating film parallel to a direction in which said trench gate extends in a planar view is located on said interlayer insulating film.