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. 30, 2014
Filed:
Jun. 29, 2011
Hiromitsu Tanabe, Nukata-gun, JP;
Kenji Kouno, Gifu, JP;
Yukio Tsuzuki, Nukata-gun, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
In a semiconductor device including an IGBT and a freewheeling diode (FWD), W, W, and Wsatisfy predetermined formulas. Wdenotes a distance from a boundary between a cathode region and a collector region to a position, where a peripheral-region-side end of the well layer is projected, on a back side of the drift layer. Wdenotes a distance from a boundary between the IGBT and the FWD in a base region to the peripheral-region-side end of the well layer. Wdenotes a distance from the boundary between the cathode region and the collector region to a position, where a boundary between the base region and the well layer is projected, on the back side.