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:
Feb. 03, 2023
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Ryohei Gejo, Kawasaki Kanagawa, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Toshiba Electronic Devices & Storage Corporation, Kawasaki, JP;
Abstract
A semiconductor device of embodiments includes: a semiconductor layer having a first face and a second face; a first semiconductor region of a first conductive type in the semiconductor layer, in contact with the second face, and including a first portion having a first minimum width, a second portion having a second minimum width smaller than the first minimum width, and a third portion connecting the first portion and the second portion and having a third minimum width smaller than the second minimum width; a plurality of second semiconductor regions of a second conductive type in contact with the second face; a third semiconductor region of the second conductive type between the first semiconductor region and the first face; a fourth semiconductor region of the first conductive type; a fifth semiconductor region of the second conductive type; a gate electrode facing the fourth semiconductor region.