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:
Jan. 24, 2017
Filed:
Oct. 29, 2014
Sandisk Technologies Llc, Plano, TX (US);
Yichao Huang, San Jose, CA (US);
Chris Avila, Saratoga, CA (US);
Dana Lee, Saratoga, CA (US);
Henry Chin, Fremont, CA (US);
Deepanshu Dutta, San Jose, CA (US);
Sarath Puthenthermadam, San Jose, CA (US);
Deepak Raghu, Milpitas, CA (US);
SanDisk Technologies LLC, Plano, TX (US);
Abstract
A number of complimentary techniques for the read scrub process using adaptive counter management are presented. In one set of techniques, in addition to maintaining a cumulative read counter for a block, a boundary word line counter can also be maintained to track the number of reads to most recently written word line or word lines of a partially written block. Another set of techniques used read count threshold values that vary with the number of program/erase cycles that a block has undergone. Further techniques involve setting the read count threshold for a closed (fully written) block based upon the number reads it experienced prior to being closed. These techniques can also be applied at a sub-block, zone level.