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. 30, 2024
Filed:
Nov. 24, 2021
Applicant:
Fuji Electric Co., Ltd., Kawasaki, JP;
Inventors:
Assignee:
FUJI ELECTRIC CO., LTD., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 29/06 (2006.01); H01L 21/265 (2006.01);
U.S. Cl.
CPC ...
H01L 21/265 (2013.01); H01L 29/0692 (2013.01);
Abstract
Provided is a semiconductor device comprising: a semiconductor substrate; a plurality of peaks of a doping concentration provided on a back surface of the semiconductor substrate; and a flat part, with a doping concentration more than or equal to 2.5 times a substrate concentration of the semiconductor substrate, provided between the plurality of peaks in a depth direction of the semiconductor substrate, wherein at least one of the plurality of peaks is a first peak provided on a front surface side relative to the flat part, wherein a doping concentration of the first peak is less than or equal to twice the doping concentration of the flat part.