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:
Dec. 02, 2003
Filed:
Feb. 27, 2001
Kazuhiro Morishita, Fukuoka, JP;
Katsumi Satoh, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In order to reduce a turn-on time of a power switching semiconductor device at a low cost, a first main electrode divided into a plurality of segments forming segment rows of a multi-concentric circle and a control electrode surrounding the segments are formed on a front major surface of a semiconductor substrate, and a second electrode is formed on a rear major surface thereof, and a turn-on operation is performed between the first main electrode and the second main electrode with a control signal inputted from the control electrode, specifying a relationship between a width of a segment and a distance between adjacent segments, and others.