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:
May. 24, 2011
Filed:
May. 15, 2008
Applicants:
Mutsuhiro Mori, Mito, JP;
Taiga Arai, Mito, JP;
Inventors:
Mutsuhiro Mori, Mito, JP;
Taiga Arai, Mito, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/74 (2006.01); H01L 31/111 (2006.01);
U.S. Cl.
CPC ...
Abstract
A fourth semiconductor region of a first conduction type is provided in a partial region of a third semiconductor region of a second conduction type. This configuration enhances the blocking voltage at the time when the sheet carrier concentration of a fifth semiconductor region is enhanced.