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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.:

US 12406879 B1

PDFFull Text
Date of Patent:
Sep. 02, 2025

Filed:

Jan. 10, 2024

Staircase formation in three-dimensional memory device

Applicant:

Yangtze Memory Technologies Co., Ltd., Wuhan, CN;

Inventor:

Yu Ting Zhou, Wuhan, CN;

Assignee:

YANGTZE MEMORY TECHNOLOGIES CO., LTD., Wuhan, CN;

Attorney:

BAYES PLLC

Primary Examiner:

Sheikh Maruf

Int. Cl.
CPC ...
H01L 21/76 (2006.01); H01L 21/311 (2006.01); H01L 21/768 (2006.01); H01L 23/522 (2006.01); H01L 23/528 (2006.01); H10B 41/27 (2023.01); H10B 43/27 (2023.01);
U.S. Cl.
CPC ...
H01L 21/76816 (2013.01); H01L 21/31111 (2013.01); H01L 21/31144 (2013.01); H01L 21/76877 (2013.01); H01L 23/5226 (2013.01); H01L 23/5283 (2013.01); H10B 41/27 (2023.02); H10B 43/27 (2023.02);
Abstract

A memory device includes a stack including conductive layers and insulating layers alternatingly stacked in a first direction, a semiconductor channel extending through the stack in the first direction, and a staircase structure including sub-staircase structures in a second direction perpendicular to the first direction. One of the sub-staircase structures includes two portions arranged along the second direction. Each of the portions includes first staircases arranged in the second direction and second staircases arranged in a third direction perpendicular to the first direction and the second direction.

Find Patent Forward Citations

Zhou, Yu. (2025). Staircase formation in three-dimensional memory device (U.S. Patent No. 12406879). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12406879

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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