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:
Apr. 14, 2015
Filed:
Sep. 08, 2012
Applicant:
Masaki Fujiu, Kanagawa-ken, JP;
Inventor:
Masaki Fujiu, Kanagawa-ken, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 11/34 (2006.01); G11C 16/34 (2006.01); G11C 11/56 (2006.01); G11C 16/04 (2006.01);
U.S. Cl.
CPC ...
G11C 16/3459 (2013.01); G11C 11/5628 (2013.01); G11C 16/0483 (2013.01);
Abstract
In one embodiment, a control circuit executes a first page writing operation, a first verify operations, a second page writing operation, a second verify operations, a step-up operation. The control circuit executes the first page writing operation which forms an intermediate distribution, and a first read operation which reads data form the intermediate distribution by using a determine voltage higher than a first verify voltage with a first value, and changes a second verify voltage based on the result of the first read operation.