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.

Date of Patent:
Feb. 27, 2018

Filed:

Nov. 20, 2014
Applicant:

Western Digital Technologies, Inc., San Jose, CA (US);

Inventors:

Seyhan Karakulak, San Diego, CA (US);

Anthony Dwayne Weathers, San Diego, CA (US);

Richard David Barndt, San Diego, CA (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 16/04 (2006.01); G11C 16/26 (2006.01); G11C 16/34 (2006.01); G11C 11/56 (2006.01);
U.S. Cl.
CPC ...
G11C 16/26 (2013.01); G11C 11/5642 (2013.01); G11C 16/3427 (2013.01);
Abstract

A plurality of flash memory wordlines of a flash storage device are divided into a plurality of wordline groups based on read error counts associated with the wordlines and a plurality of read level offsets. Each wordline group is associated with one of a plurality of read level offsets determined while dividing the plurality of flash memory wordlines, and associations between the plurality of read level offsets and the plurality of wordline groups are stored for use in connection with read levels to read the flash memory wordlines of the respective wordline groups.


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