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:
Jan. 18, 2022
Filed:
Jul. 17, 2020
Ablic Inc., Tokyo, JP;
Yuki Osuga, Tokyo, JP;
Hirofumi Harada, Tokyo, JP;
ABLIC INC., Chiba, JP;
Abstract
A second source portion having an impurity concentration lower than that of a first source portion, both forming a source region, includes a first sub-portion having a depth from a bottom surface of the first source portion down to a second height higher than a first height, and a second sub-portion having an upper surface in contact with a part of a bottom surface of the first sub-portion, one side surface in a second direction perpendicular to a first direction in contact with an outer side surface of the trench, another side surface in the second direction, both side surfaces in the first direction, and a bottom surface in contact with the base layer, and having a depth from a bottom surface of the first sub-portion up to at least the first height.