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:
Jul. 03, 2018
Filed:
Aug. 25, 2017
Applicant:
Toshiba Memory Corporation, Minato-ku, JP;
Inventor:
Tsuyoshi Atsumi, Ota, JP;
Assignee:
TOSHIBA MEMORY CORPORATION, Minato-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/34 (2006.01); G11C 16/26 (2006.01); G11C 29/02 (2006.01); G11C 16/34 (2006.01); G11C 29/04 (2006.01);
U.S. Cl.
CPC ...
G11C 16/26 (2013.01); G11C 16/349 (2013.01); G11C 29/021 (2013.01); G11C 29/028 (2013.01); G11C 2029/0409 (2013.01);
Abstract
According to one embodiment, a distribution of threshold voltages of a plurality of memory cells is acquired from a nonvolatile memory which includes the plurality of memory cells, a malfunction state occurring in the nonvolatile memory is identified based on a shape of the distribution, and a read voltage when data is read out of the nonvolatile memory is set to a voltage value corresponding to a type of the malfunction state.