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:
Jul. 26, 2022
Filed:
May. 18, 2020
Sandisk Technologies Llc, Addison, TX (US);
Kengo Kajiwara, Yokkaichi, JP;
Atsushi Shimoda, Yokkaichi, JP;
Tatsuya Hinoue, Yokkaichi, JP;
Junpei Kanazawa, Yokkaichi, JP;
Masanori Terahara, Yokkaichi, JP;
SANDISK TECHNOLOGIES LLC, Addison, TX (US);
Abstract
A three-dimensional memory device includes a first-tier structure located over a substrate and including a first alternating stack of first insulating layers and first electrically conductive layers. a second-tier structure located over the first-tier structure and including a second alternating stack of second insulating layers and second electrically conductive layers, memory stack structures vertically extending through the first alternating stack and the second alternating stack, primary support pillar structures, and auxiliary support pillar structures vertically extending through the first alternating stack, underlying the second stepped surfaces, and located below a horizontal plane including a bottommost surface of the second alternating stack.