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. 09, 2025
Filed:
Dec. 08, 2022
Kioxia Corporation, Tokyo, JP;
Gin Suzuki, Yokkaichi, JP;
Daisuke Kawamura, Kiyosu, JP;
Tomonori Sakaguchi, Yokkaichi, JP;
Ikuya Saiki, Mie, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
According to one embodiment, a semiconductor memory device includes a first staircase portion that is arranged in a staircase region at a position that overlaps a plate-like portion in a stacking direction, in which a plurality of conductive layers is terraced in a first direction; and a second staircase portion and a third staircase portion arranged in the staircase region on both sides in a second direction of the plate-like portion, and having structures in each of which the plurality of conductive layers is terraced, and that are mutually inverted in the second direction with respect to the plate-like portion. A plurality of first plugs is individually arranged at different positions in the second direction relative to the plate-like portion, depending on positions in the first direction, and a plurality of second plugs is individually arranged at positions inverted in the second direction from the respective positions of the plurality of first plugs, with respect to the plate-like portion.