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. 18, 2017
Filed:
Mar. 17, 2016
Applicant:
Emc Corporation, Hopkinton, MA (US);
Inventor:
Richard H. Van Gaasbeck, Mountain View, CA (US);
Assignee:
EMC IP Holding Co., LLC, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/02 (2006.01); G11C 16/34 (2006.01); G11C 16/10 (2006.01); G11C 16/26 (2006.01);
U.S. Cl.
CPC ...
G11C 16/3431 (2013.01); G11C 16/10 (2013.01); G11C 16/26 (2013.01);
Abstract
A non-volatile memory has multi-level arrays of write-in place memory cells that are subject to change over time because of read and write disturbs. Disturb count counters of each read cell and each cell surrounding a written target cell are incremented by different scaling factors that reflect the effect of the disturbs on each such cell. Upon a counter reaching a predetermined threshold, a refresh of the cell is initiated.