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:
Sep. 03, 2024
Filed:
Sep. 02, 2022
Kioxia Corporation, Tokyo, JP;
Kyoka Konishi, Yokohama Kanagawa, JP;
Yasuyuki Ushijima, Yokohama Kanagawa, JP;
Hisaki Niikura, Tokyo, JP;
Eriko Akaihata, Yokohama Kanagawa, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
According to one embodiment, each time the number of program/erase cycles of a block increases by a first number of times, a controller of a memory system measures the number of error bits of data read from a plurality of memory cells connected to each of a plurality of word lines. The controller identifies a word line group including a word line corresponding to the number of error bits which is greater than a threshold. The controller selects, based on an average number of error bits of the identified word line group, a parameter set to be applied to the identified word line group from a plurality of parameter sets. The controller changes, to the selected parameter set, a parameter set defining a program operation for the identified word line group.