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:
Feb. 28, 2023
Filed:
Aug. 07, 2020
Kioxia Corporation, Minato-ku, JP;
Fumie Kikushima, Yokkaichi, JP;
Kioxia Corporation, Minato-ku, JP;
Abstract
A semiconductor memory device includes a substrate, a plurality of first conductive layers, a second conductive layer, a first pillar, and a second pillar. The plurality of first conductive layers are stacked over the substrate in a first direction. The second conductive layer is disposed over the plurality of first conductive layers. The first pillar extends inside the plurality of first conductive layers in the first direction. The first pillar includes a first semiconductor portion including a first semiconductor of single-crystal. The second pillar extends inside the second conductive layer in the first direction. The second pillar includes an insulating portion serving as an axis including an insulator and a second semiconductor portion which is disposed on an outer circumference of the insulating portion in view of the first direction. The second semiconductor portion is in contact with the first semiconductor portion and includes a second semiconductor of poly-crystal.