Error detection/correction and fault detection/recovery – Pulse or data error handling – Memory testing
Reexamination Certificate
2011-08-09
2011-08-09
Tabone, Jr., John J (Department: 2117)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Memory testing
C714S737000, C714S718000, C714S710000, C711S156000, C711S206000
Reexamination Certificate
active
07996736
ABSTRACT:
A technique for identifying bad pages of storage elements in a memory device. A flag byte is provided for each page group of one or more pages which indicates whether the page group is healthy. Flag bytes of selected page groups also indicate whether larger sets of page groups are healthy, according to bit positions in the flag bytes. A bad page identification process includes reading the flag bytes with a selected granularity so that not all flag bytes are read. Optionally, a drill down process reads flag bytes for smaller sets of page groups when a larger set of page groups is identified as having at least one bad page. This allows the bad page groups to be identified and marked with greater specificity. Redundant copies of flag bytes may be stored in different locations of the memory device. A majority vote process assigns a value to each bit.
REFERENCES:
patent: 5758056 (1998-05-01), Barr
patent: 5915167 (1999-06-01), Leedy
patent: 6549459 (2003-04-01), Higuchi
patent: 6813678 (2004-11-01), Sinclair et al.
patent: 6826081 (2004-11-01), Nagashima et al.
patent: 6845438 (2005-01-01), Tanaka et al.
patent: 6895490 (2005-05-01), Moore et al.
patent: 7013376 (2006-03-01), Hooper, III
patent: 7142471 (2006-11-01), Fasoli et al.
patent: 7171536 (2007-01-01), Chang et al.
patent: 7366825 (2008-04-01), Williams et al.
patent: 7423904 (2008-09-01), Kojima
patent: 7466600 (2008-12-01), Roohparvar
patent: 7472331 (2008-12-01), Kim
patent: 2004/0210709 (2004-10-01), Conley et al.
patent: 2006/0250836 (2006-11-01), Herner
patent: 2008/0294935 (2008-11-01), Ni et al.
Grosspietsch, Schemes of Dynamic Redundancy for Fault Tolerance in Random Access Memories, Aug. 1988, IEEE, vol. 37, No. 3. pp. 331-339.
Bottelli Aldo
Fasoli Luca
SanDisk 3D LLC
Tabone, Jr. John J
Vierra Magen Marcus & DeNiro LLP
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