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:
Apr. 29, 2025
Filed:
Jul. 22, 2022
Denso Corporation, Kariya, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Mirise Technologies Corporation, Nisshin, JP;
Masato Noborio, Nisshin, JP;
DENSO CORPORATION, Kariya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
MIRISE Technologies Corporation, Nisshin, JP;
Abstract
A semiconductor device has a cell region formed with a semiconductor element and an outer peripheral region surrounding the cell region. The outer peripheral region includes a guard ring part having a plurality of guard rings of the second conductivity-type, and a plurality of guard ring column regions of the second conductivity-type. Each of the guard rings is disposed in a surface layer portion of the drift layer and has a frame shape surrounding the cell region. The guard ring column regions are extended from the guard rings toward the substrate. Each of the guard ring column regions has a width smaller than a width of each of the guard rings in a direction along a planar direction of the substrate in a predetermined cross-section defined along the cell region and the outer peripheral region. At least two guard ring column regions are provided for each guard ring.