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:
Mar. 01, 2016
Filed:
Sep. 19, 2014
Sanken Electric Co., Ltd., Niiza-shi, Saitama, JP;
Kazuko Ogawa, Niiza, JP;
Satoshi Kawashiri, Niiza, JP;
Sanken Electric Co., LTD., Niiza-shi, Saitama, JP;
Abstract
A semiconductor device includes: a first semiconductor region; a second semiconductor region; a third semiconductor region; a fourth semiconductor region; an insulation film, which is arranged on an inner wall of a recess that extends from an upper surface of the fourth semiconductor region and reaches the second semiconductor region with penetrating the fourth semiconductor region and the third semiconductor region; a control electrode, which is arranged on the insulation film on a side surface of the recess and faces the third semiconductor region; a first main electrode, which is electrically connected to the first semiconductor region, and a second main electrode, which is electrically connected to the fourth semiconductor region, wherein a ratio of a width of the recess to a width of the third semiconductor region contacting the second main electrode is 1 or larger.