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:
Dec. 17, 2024
Filed:
Sep. 14, 2022
Kioxia Corporation, Tokyo, JP;
Tadayoshi Watanabe, Yokkaichi Mie, JP;
Kouji Matsuo, Ama Aichi, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
A semiconductor memory device includes first memory layers and second memory layers arranged in alternation in a first direction. First memory layers and second memory layers include memory strings and first wirings connected to these memory strings in common. First memory layers and second memory layers include: signal amplifier circuits electrically connected to the first wirings; second wirings connected to the signal amplifier circuits; first switch transistors connected to the second wirings; third wirings electrically connected to the second wirings via the first switch transistors; and fourth wirings electrically connected to the second wirings without via the first switch transistors. The semiconductor memory device includes: first via-contact electrodes extending in the first direction and connected to the third wirings in first memory layers; and second via-contact electrodes extending in the first direction and connected to the fourth wirings in second memory layers.