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:
Nov. 18, 2025
Filed:
Feb. 02, 2023
Kioxia Corporation, Tokyo, JP;
Ryota Hirai, Chigasaki Kanagawa, JP;
Yasuhiro Shiino, Fujisawa Kanagawa, JP;
Kioxia Corporation, Tokyo, JP;
Abstract
A semiconductor storage device that is capable of improving reliability includes: a non-volatile memory provided with a block including a plurality of memory cell transistors connected to a word line; and a controller configured to monitor a threshold voltage distribution width of the plurality of memory cell transistors after performing at least one of an erasing operation on the block and a preliminary write operation on the plurality of memory cell transistors and to classify the plurality of memory cell transistors according to the threshold voltage distribution width of the plurality of memory cell transistors.