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:
Mar. 07, 2023
Filed:
Mar. 10, 2020
Kioxia Corporation, Tokyo, JP;
Naoya Yoshimura, Kuwana Mie, JP;
Satoshi Nagashima, Yokkaichi Mie, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
A semiconductor memory device includes a first pillar. The first pillar includes a first portion and a second portion. The first portion includes a first semiconductor layer and a first insulating film on a side surface of the first semiconductor layer. The first pillar includes a first region that faces the first portion and a second region other than the first region. The second portion includes a first conductive film that is in contact with the first insulating film and a second insulating film. The second insulating film has a first thickness in a fourth direction within the second region and a second thickness in the second direction within the first region. The first thickness is greater than the second thickness.