The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2014
Filed:
Jul. 25, 2012
Seiji Momota, Nagano, JP;
Takeshi Fujii, Nagano, JP;
Satoshi Kamijima, Nagano, JP;
Makoto Asai, Kariya, JP;
Seiji Momota, Nagano, JP;
Takeshi Fujii, Nagano, JP;
Satoshi Kamijima, Nagano, JP;
Makoto Asai, Kariya, JP;
Fuji Electric Co., Ltd., Kawasaki-shi, JP;
Denso Corporation, Kariya, JP;
Abstract
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.