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. 03, 2024
Filed:
Jul. 18, 2023
Fuji Electric Co., Ltd., Kanagawa, JP;
Tatsuya Naito, Matsumoto, JP;
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Abstract
A semiconductor device includes a semiconductor substrate having a first conductivity type drift region and a second conductivity type base region above the drift region, trench portions at an upper surface of the semiconductor substrate arrayed parallel to one another, each of them penetrating the base region, and mesa portions between respective trench portions. Among the mesa portions, at least one mesa portion includes a first conductivity type first semiconductor region having a higher concentration than the drift region, a second conductivity type second semiconductor region having a higher concentration than the base region, and a first conductivity type accumulation region between the base and drift regions and has a higher concentration than the drift region. The drift region does not extend above the accumulation region. In a longitudinal direction of the trench portions, the accumulation region extends beyond an end portion of the first semiconductor region.