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. 28, 2026
Filed:
Aug. 28, 2023
Fuji Electric Co., Ltd., Kawasaki, JP;
Ryouichi Kawano, Matsumoto-city, JP;
Motoyoshi Kubouchi, Matsumoto-city, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
A semiconductor device includes: a semiconductor substrate of a first conductivity-type; an insulated gate electrode structure buried in a first trench provided in the semiconductor substrate; a base region of a second conductivity-type provided in the semiconductor substrate so as to be in contact with the first trench; a first main electrode region of the first conductivity-type provided at an upper part of the base region so as to be in contact with the first trench; a polysilicon film of the second conductivity-type having a higher impurity concentration than the base region and buried in a second trench provided in the semiconductor substrate so as to be in contact with the base region; and a second main electrode region provided on a bottom surface side of the semiconductor substrate.