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:
Aug. 25, 2026
Filed:
Oct. 31, 2022
Fuji Electric Co., Ltd., Kawasaki, JP;
Naoki Kuneshita, Matsumoto-City, JP;
Makoto Endou, Matsumoto-City, JP;
Atsushi Yoshimoto, Matsumoto-City, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
A first semiconductor region of a second conductivity type, a second semiconductor region of a first conductivity type, gate trenches, a gate insulating film, gate electrodes, and an interlayer insulating film are formed. Next, a contact hole that penetrates through the interlayer insulating film and reaches the first semiconductor region is formed, and in a surface layer of the first semiconductor region exposed at a bottom of the contact hole, a third semiconductor region of the second conductivity type is formed by an ion implantation using, as a mask, a polymer formed herewith; and after the ion implantation, the polymer is removed. Next, a fourth semiconductor region of the second conductivity type, a first electrode, and a second electrode are formed.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile