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:
Nov. 10, 2020
Filed:
Sep. 26, 2019
Applicant:
Western Digital Technologies, Inc., San Jose, CA (US);
Inventors:
Assignee:
WESTERN DIGITAL TECHNOLOGIES, INC., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01); G11C 29/44 (2006.01); G11C 16/08 (2006.01); G11C 16/34 (2006.01); G11C 16/16 (2006.01); G11C 29/12 (2006.01);
U.S. Cl.
CPC ...
G11C 29/44 (2013.01); G11C 16/08 (2013.01); G11C 16/16 (2013.01); G11C 16/3431 (2013.01); G11C 29/848 (2013.01); G11C 2029/1202 (2013.01);
Abstract
A storage device may include a controller performing non data word line (NDWL) maintenance in sub block mode (SBM). The NDWL maintenance in SBM can include proactive select gate drain (SGD) detection and phased SGD correction. For example, when a block reaches a PE cycle threshold value, SGD phased correction occurs upon detection of an error, by determining whether a sister sub block of the selected block contains data. If the sister sub block contains data, the data is transferred from the sister sub block, and then the block and sister sub block undergo correction for NDLW maintenance.