Denso Corporation

Fuji Electric Co., Ltd.

Satoshi Kamijima

Seiji Momota

Makoto Asai

Takeshi Fujii

A semiconductor device includes a first semiconductor region of a first conductivity type; a second semiconductor region of a second conductivity type, disposed on a surface of the first semiconductor region, and having an impurity concentration higher than that of the first semiconductor region; a trench that penetrates the second semiconductor region to reach the first semiconductor region; a first electrode disposed inside the trench via an insulating film; a first recess portion disposed deeper than an upper end of the first electrode, in a surface layer of the second semiconductor region, so as to be in contact with the trench; and a second electrode embedded in the first recess portion.

Growing community of inventors

Nagano, Japan

Satoshi Kamijima