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:
Jul. 14, 2026
Filed:
Oct. 14, 2022
Sumitomo Electric Industries, Ltd., Osaka, JP;
Yu Saitoh, Osaka, JP;
Takeyoshi Masuda, Osaka, JP;
MITSUMI ELECTRIC CO., LTD., Tokyo, JP;
Abstract
A silicon carbide semiconductor device includes a silicon carbide substrate having a first main surface. The first main surface is provided with a gate trench. A contour of the gate trench on the first main surface is curved along a third side surface and a fourth side surface, and a contour of the gate trench in a cross section includes a first local minimum point at which a radius of curvature is a local minimum at a boundary between a first side surface and the third side surface, a second local minimum point at which a radius of curvature is a local minimum at a boundary between a second side surface and the fourth side surface, and a third local minimum point at which a radius of curvature is a local minimum at a boundary between the third side surface and the fourth side surface.