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:
Jun. 02, 2026
Filed:
Aug. 26, 2024
Kioxia Corporation, Tokyo, JP;
Akiyuki Murayama, Koto, JP;
Yusuke Arayashiki, Kawasaki, JP;
Tsuyoshi Ogikubo, Yokohama, JP;
Suzuka Kajiwara, Kamakura, JP;
Motohiko Fujimatsu, Shinagawa, JP;
Katsuya Nishiyama, Yokohama, JP;
Kikuko Sugimae, Yokohama, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
A semiconductor memory device includes: a memory cell array including a plurality of bit lines, a source line, a plurality of NAND strings, a first and a second sub block, a first word line group included in the first sub block, a second word line group included in the second sub block, and a dummy word line located between the first and second sub blocks; and a control circuit capable of applying predetermined voltages to the first word line group, the second word line group, and the dummy word line. When a specific word line belonging to the first word line group is selected for the execution of a write operation, a voltage higher than voltages applied to an unselected word line belonging to the first word line group and the second word line group is applied to the dummy word line.