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:
Feb. 10, 2026
Filed:
Aug. 15, 2023
Kabushiki Kaisha Toshiba, Tokyo, JP;
Toshiba Electronic Devices & Storage Corporation, Tokyo, JP;
Hiroki Hatada, Kanazawa Ishikawa, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Toshiba Electronic Devices & Storage Corporation, Kawasaki, JP;
Abstract
A semiconductor device according to an embodiment includes: a first semiconductor region of a first conductivity type disposed; a second semiconductor region of a second conductivity type disposed on the first region; a third semiconductor region of the first conductivity type disposed on the second region; an insulating film disposed in the first, second and third regions; and a second electrode disposed in the insulating film so as to be adjacent to the second region via the insulating film. The second region includes a boundary region that is in contact with the insulating film and faces the second electrode, the boundary region includes a high-concentration region, the insulating film includes a first region in contact with the high-concentration region and a second region in contact with a low-concentration region, and a thickness of the second region is smaller than a thickness of the first region.