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. 16, 2025
Filed:
Mar. 17, 2022
Yangtze Memory Technologies Co., Ltd., Hubei, CN;
Yangtze Memory Technologies Co., Ltd., Wuhan, CN;
Abstract
Three-dimensional memory devices and fabricating methods therefore are disclosed. The memory device can comprise a stack structure comprising a plurality of gate layers, a plurality of first insulating layers, and a plurality of second insulating layers. The stack structure has a staircase region comprising a plurality of stair structures. Each stair structure comprises a first portion of the stair structure comprising one gate layer and a first portion of one first insulating layer, and a second portion of the stair structure comprising a second portion of the one first insulating layer and a second insulating layer. The memory device can further comprise at least one contact structure each located on a top surface of one of the plurality of stair structures, and at least one contact portion in contact with the at least one contact structure.