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:
Oct. 11, 2022
Filed:
May. 27, 2020
Western Digital Technologies, Inc., San Jose, CA (US);
Nikhil Arora, Karnataka, IN;
Lovleen Arora, Karnataka, IN;
Sourabh Sankule, Karnataka, IN;
Sameer Hiware, Karnataka, IN;
WESTERN DIGITAL TECHNOLOGIES, INC., San Jose, CA (US);
Abstract
Aspects of a storage device including a controller are provided which identifies a bad, open block that causes subsequent erase operations to fail in closed blocks due to charge leakage following a previous program operation in the open block. Each time the controller programs an open block, the controller attempts to erase a plurality of closed blocks following each programming of the open block. When the closed blocks fail to erase, the controller determines whether a number of consecutive erase failures after programming the open block meets a threshold, after which the controller re-attempts to erase the closed blocks. After a successful re-attempt, the controller stores a list of open blocks in memory. In response to repeating these steps a number or plurality of times, the controller stores multiple lists of open blocks in memory, and identifies the single common open block between the multiple lists as a bad block.