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. 23, 2025
Filed:
Oct. 31, 2022
Denso Corporation, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Mirise Technologies Corporation, Nisshin, JP;
Yohei Iwahashi, Nisshin, JP;
Jun Saito, Nisshin, JP;
DENSO CORPORATION, Kariya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
MIRISE Technologies Corporation, Nisshin, JP;
Abstract
In a semiconductor device, a first deep layer has a high-concentration region and a low-concentration region in a concentration profile of an impurity concentration along a depth direction. The high-concentration region has a high concentration peak at which an impurity concentration is maximum, and includes a region that is not depleted in an off state. The low-concentration region is closer to a high-concentration layer than the high-concentration region, has a region in which a gradient of change in impurity concentration is smaller than a predetermined value, and is depleted in the off state. A first length between a first position closest to a base layer in the first deep layer and a second position of the high concentration peak is shorter than a second length between the second position and a third position closest to the base layer in the low-concentration region.