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:
Oct. 21, 2025
Filed:
Dec. 22, 2022
Sandisk Technologies Llc, Addison, TX (US);
Kartik Sondhi, Milpitas, CA (US);
Raghuveer S. Makala, Campbell, CA (US);
Adarsh Rajashekhar, Santa Clara, CA (US);
Rahul Sharangpani, Fremont, CA (US);
Fei Zhou, San Jose, CA (US);
Sandisk Technologies, Inc., Milpitas, CA (US);
Abstract
A memory device includes an alternating stack of insulating layers and electrically conductive layers, a memory opening vertically extending through the alternating stack, and a memory opening fill structure located in the memory opening and including a vertical semiconductor channel and a memory film. The memory film includes a memory material layer having a straight inner cylindrical sidewall that vertically extends through a plurality of electrically conductive layers within the alternating stack without lateral undulation and a laterally-undulating outer sidewall having outward lateral protrusions at levels of the plurality of electrically conductive layers.