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:
Sep. 13, 2016
Filed:
Jan. 14, 2014
Applicant:
Fuji Electric Co., Ltd., Kawasaki, JP;
Inventor:
Seiji Momota, Matsumoto, JP;
Assignee:
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/40 (2006.01); H01L 29/861 (2006.01); H01L 29/06 (2006.01);
U.S. Cl.
CPC ...
H01L 29/402 (2013.01); H01L 29/0615 (2013.01); H01L 29/8611 (2013.01);
Abstract
A power diode is disclosed wherein it is possible to lower on-voltage by expanding a conducting region at an on time. By applying negative voltage to a plate electrode when turning on a power diode, an inversion layer is formed in a front surface layer of an n drift region sandwiched between a p guard ring region and a p anode region, and the p guard ring region and p anode region are connected by the inversion layer, thereby causing one portion or all of the p guard ring region to function as an active region together with the anode region, and expanding an energization region, thus lowering on-voltage.