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:
Aug. 05, 2025
Filed:
Jun. 15, 2022
Kioxia Corporation, Tokyo, JP;
Takahito Nishimura, Kuwana, JP;
Takuya Nishikawa, Yokkaichi, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
According to one embodiment, a semiconductor memory device includes: a first stacked body that includes a memory region, a stepped region, and a connection region arranged in a first direction; a plurality of first pillars that is disposed in the memory region, extends in the first stacked body in the stacking direction; a plurality of second pillars that includes a second insulating layer, has a layer structure different from a layer structure of the first pillars, and extends in the stacking direction in a position overlapping a stepped portion disposed in the stepped region in the stacking direction; and a plurality of third pillars that extends in the first stacked body in the stacking direction, and has a same layer structure as the layer structure of the first pillars, at least a part of the plurality of third pillars being disposed in the connection region.