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. 27, 2012
Filed:
Apr. 14, 2010
Applicants:
Ken Sato, Niiza, JP;
Nobuo Kaneko, Niiza, JP;
Inventors:
Ken Sato, Niiza, JP;
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 semiconductor deviceincludes a substratehaving on a main surface thereof a central area and a peripheral area which surrounds the central area and is exposed, a semiconductor layerwhich is formed on the main surface of the substrate, is made of a material harder than the substrate, is in the shape of a mesa, and has a steep side over the exposed peripheral area, and an insulating filmS provided on a side surface of the semiconductor layer