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:
Jan. 20, 2026
Filed:
Aug. 22, 2022
Kioxia Corporation, Tokyo, JP;
Natsuki Fukuda, Yokkaichi Mie, JP;
Tadashi Iguchi, Yokkaichi Mie, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
A semiconductor memory device includes a substrate including a first region and a second region, a plurality of first conductive layers, a first semiconductor layer disposed in the first region, an electric charge accumulating layer, a contact electrode disposed in the second region and connected to one of the plurality of first conductive layers, and a plurality of first structures and a plurality of second structures disposed in the second region. The first structure includes a second semiconductor layer opposed to the plurality of first conductive layers and including a semiconductor material in common with the first semiconductor layer, and a first insulating layer disposed between the plurality of first conductive layers and the second semiconductor layer and including an insulating material in common with the electric charge accumulating layer. The second structure does not include the semiconductor material or the insulating material.