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. 15, 2026
Filed:
Jul. 21, 2023
Sandisk Technologies Llc, Addison, TX (US);
Koichi Matsuno, Fremont, CA (US);
Johann Alsmeier, San Jose, CA (US);
Sandisk Technologies, Inc., Milpitas, CA (US);
Abstract
A memory device includes a first-tier alternating stack of first insulating layers and electrically conductive layers located over a substrate, a second-tier alternating stack of second insulating layers and second electrically conductive layers overlying the first-tier alternating stack, a memory stack structure vertically extending through the first-tier alternating stack and the second-tier alternating stack, and a first support and contact assembly vertically extending through the first-tier alternating stack and the second-tier alternating stack. The first support and contact assembly includes a first contact via structure contacting an annular top surface of an electrically conductive layer, a first dielectric pillar structure underlying the reference-level electrically conductive layer, and a first-tier dielectric spacer that laterally surrounds the first contact via structure.