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:
May. 19, 2020
Filed:
Aug. 04, 2016
Applicant:
Sony Corporation, Tokyo, JP;
Inventor:
Kazuyuki Date, Kanagawa, JP;
Assignee:
Sony Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/16 (2006.01); G06F 3/08 (2006.01); G11C 11/56 (2006.01); G06F 3/06 (2006.01); G06F 12/02 (2006.01); G11C 16/26 (2006.01); G11C 16/04 (2006.01);
U.S. Cl.
CPC ...
G11C 16/16 (2013.01); G06F 3/0608 (2013.01); G06F 3/0652 (2013.01); G06F 3/0679 (2013.01); G06F 3/08 (2013.01); G06F 12/0246 (2013.01); G11C 11/5628 (2013.01); G11C 16/26 (2013.01); G06F 2212/7205 (2013.01); G11C 16/0483 (2013.01);
Abstract
A semiconductor memory device and method of erasing data are disclosed. In one example, a semiconductor memory device includes a block including a plurality of pages and a controller that controls writing, erasing, and reading of data. Each of the pages includes a plurality of memory cells each being changeable to a number of states. In a case of erasing only a partial page of the plurality of pages, the controller overwrites the partial page with predetermined data that causes state change only by one stage.