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:
Aug. 12, 2025
Filed:
Sep. 05, 2023
Kioxia Corporation, Tokyo, JP;
Haruka Mori, Kawasaki Kanagawa, JP;
Mitsunori Tadokoro, Fujisawa Kanagawa, JP;
Akinori Nagaoka, Tokyo, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
According to one embodiment, a controller for a memory system including a nonvolatile memory with physical blocks sets logical blocks including the physical blocks, manages a first table having a first value indicating a threshold voltage to be used for reading data from each logical block, a second table for each physical block having a corrected threshold voltage that has been statistically determined to be an outlier in association with a second value indicating the corrected threshold voltage for the physical block. The controller performs a threshold voltage tracking for identifying a threshold voltage suitable for reading data from a physical block if a reading fails, and then retries the reading using the threshold voltage obtained by the threshold voltage tracking. The controller updates the first table if the physical block is not listed in the second table, but not otherwise.