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:
Jan. 18, 2011
Filed:
Feb. 03, 2009
Applicants:
Susumu Iwamoto, Matsumoto, JP;
Takashi Kobayashi, Matsumoto, JP;
Inventors:
Susumu Iwamoto, Matsumoto, JP;
Takashi Kobayashi, Matsumoto, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/74 (2006.01); H01L 31/111 (2006.01); H01L 29/76 (2006.01); H01L 29/94 (2006.01); H01L 27/108 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor device includes deep first field limiting rings, shallow second field limiting rings, insulation films covering each surface portion of each of the first and the second field limiting rings, and conductive field plates each in contact with a surface of each of the first and the second field limiting rings. Each of the field plates project over a surface of each of the insulation films between the first field limiting rings and the second field limiting rings.