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:
Apr. 29, 2014
Filed:
Nov. 10, 2011
Yan LI, Milpitas, CA (US);
Kwang-ho Kim, Pleasanton, CA (US);
Frank W. Tsai, Mountain View, CA (US);
Aldo Bottelli, Redwood City, CA (US);
Yan Li, Milpitas, CA (US);
Kwang-Ho Kim, Pleasanton, CA (US);
Frank W. Tsai, Mountain View, CA (US);
Aldo Bottelli, Redwood City, CA (US);
SanDisk Technologies Inc., Plano, TX (US);
Abstract
Column based defect management techniques are presented. Each column of the memory has an associated isolation latch or register whose value indicates whether the column is defective, but in addition to this information, for columns marked as defective, additional information is used to indicate whether the column as a whole is to be treated as defective, or whether just individual bits of the column are defective. The defective elements can then be re-mapped to a redundant element at either the appropriate bit or column level based on the data. When a column is bad, but only on the bit level, the good bits can still be used for data.