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. 26, 2012
Filed:
Feb. 02, 2010
Applicant:
Nobuo Kaneko, Niiza, JP;
Inventor:
Nobuo Kaneko, Niiza, JP;
Assignee:
Sanken Electric Co., Ltd., Niiza-shi, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L 29/66 (2006.01);
U.S. Cl.
CPC ...
Abstract
A object is to provide a semiconductor device having normally-off characteristics and capable of easily suppressing field concentration below a side surface of a concave portion. A device includes a nitride-based semiconductor layer having a concave portion formed in a part of one principal surface, a side surface of the concave portion being slanted; a first electrode provided on the principal surface; a second electrode on an opposite side to the first electrode across the concave portion, and provided on the principal surface; an insulating layer formed on both sides of the concave portion in the principal surface; and