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:
May. 20, 2025
Filed:
Apr. 07, 2022
Sandisk Technologies Llc, Addison, TX (US);
Nobuyuki Fujimura, Yokkaichi, JP;
Shunsuke Takuma, Yokkaichi, JP;
Takashi Kudo, Yokkaichi, JP;
Satoshi Shimizu, Yokkaichi, JP;
Zhixin Cui, Yokkaichi, JP;
Sandisk Technologies, Inc., Milpitas, CA (US);
Abstract
A memory device includes a first alternating stack of first insulating layers and first electrically conductive layers located over a substrate, a memory opening vertically extending through the first alternating stack and having a tapered sidewall surface at a level of one of the first electrically conductive layers, and a memory opening fill structure located in the memory opening and comprising a vertical stack of memory elements and a vertical semiconductor channel. One of the first electrically conductive layers includes a taper-containing electrically conductive layer that is located at a level of the lateral protrusion of the memory opening and has a contoured sidewall having a tapered sidewall segment that is parallel to the tapered sidewall surface of the lateral protrusion.