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:
Jun. 16, 2015
Filed:
Sep. 25, 2013
Sanken Electric Co., Ltd., Niiza-shi, Saitama, JP;
Kazuko Ogawa, Niiza, JP;
Sanken Electric Co., LTD., Niiza-shi, Saitama, JP;
Abstract
A semiconductor device includes: a first semiconductor region; a second semiconductor region, which is arranged on the first semiconductor region; a third semiconductor region, which is arranged on the second semiconductor region; a plurality of fourth semiconductor regions, each of which is arranged with being spaced from each other on the third semiconductor region; a insulation film arranged on a inner wall of a recess, which extends from upper faces of the fourth semiconductor region to pass through the third semiconductor region and the fourth semiconductor region and reaches the second semiconductor region; a control electrode, a first main electrode, a second main electrode, which is electrically connected to the third semiconductor region and the fourth semiconductor region, wherein a ratio of a width of the recess to a width of the third semiconductor region abutting on the second main electrode is 1 or more.