Static information storage and retrieval – Read/write circuit – Data refresh
Reexamination Certificate
2007-03-28
2009-08-11
Luu, Pho M. (Department: 2824)
Static information storage and retrieval
Read/write circuit
Data refresh
C365S185020, C365S185010, C365S189070, C365S201000
Reexamination Certificate
active
07573773
ABSTRACT:
The quality of data stored in individual blocks of memory cells of a flash memory system is monitored by a scrub read of only a small portion of a block, performed after data are read from less than all of a block in response to a read command from a host or memory controller. The small portion is selected for the scrub read because of its greater vulnerability than other portions of the block to being disturbed as a result of the commanded partial block data read. This then determines, as the result of reading a small amount of data, whether at least some of the data in the block was disturbed by the command data read to a degree that makes it desirable to refresh the data of the block.
REFERENCES:
patent: 4139911 (1979-02-01), Sciulli et al.
patent: 4218764 (1980-08-01), Furuta et al.
patent: 4253059 (1981-02-01), Bell et al.
patent: 4460982 (1984-07-01), Gee et al.
patent: 4612630 (1986-09-01), Rosier
patent: 4694454 (1987-09-01), Matsuura
patent: 4703196 (1987-10-01), Arakawa
patent: 4703453 (1987-10-01), Shinoda et al.
patent: 4733394 (1988-03-01), Giebel
patent: 4763305 (1988-08-01), Kuo
patent: 4779272 (1988-10-01), Kohda et al.
patent: 4799195 (1989-01-01), Iwahashi et al.
patent: 4809231 (1989-02-01), Shannon et al.
patent: 4827450 (1989-05-01), Kowalski
patent: 4937787 (1990-06-01), Kobatake
patent: 4962322 (1990-10-01), Chapman
patent: 4964079 (1990-10-01), Devin
patent: 4975883 (1990-12-01), Baker et al.
patent: 5043940 (1991-08-01), Harari
patent: 5065364 (1991-11-01), Atwood et al.
patent: 5070032 (1991-12-01), Yuan et al.
patent: 5095344 (1992-03-01), Harari
patent: 5119330 (1992-06-01), Tanagawa
patent: 5122985 (1992-06-01), Santin
patent: 5132935 (1992-07-01), Ashmore, Jr.
patent: 5151906 (1992-09-01), Sawada
patent: 5157629 (1992-10-01), Sato et al.
patent: 5172338 (1992-12-01), Mehrotra et al.
patent: 5200922 (1993-04-01), Rao
patent: 5200959 (1993-04-01), Gross et al.
patent: 5239505 (1993-08-01), Fazio et al.
patent: 5262984 (1993-11-01), Noguchi et al.
patent: 5263032 (1993-11-01), Porter et al.
patent: 5270551 (1993-12-01), Kamimura et al.
patent: 5270979 (1993-12-01), Harari et al.
patent: 5278794 (1994-01-01), Tanaka et al.
patent: 5313421 (1994-05-01), Guterman et al.
patent: 5313427 (1994-05-01), Schreck et al.
patent: 5315541 (1994-05-01), Harari et al.
patent: 5321655 (1994-06-01), Iwahashi et al.
patent: 5327383 (1994-07-01), Merchant et al.
patent: 5335198 (1994-08-01), Van Buskirk et al.
patent: 5341334 (1994-08-01), Maruyama
patent: 5343063 (1994-08-01), Yuan et al.
patent: 5347489 (1994-09-01), Merchant et al.
patent: 5365486 (1994-11-01), Schreck
patent: 5377147 (1994-12-01), Merchant et al.
patent: 5394359 (1995-02-01), Kowalski
patent: 5404485 (1995-04-01), Ban
patent: 5465236 (1995-11-01), Naruke
patent: 5475693 (1995-12-01), Christopherson et al.
patent: 5504760 (1996-04-01), Harari et al.
patent: 5523972 (1996-06-01), Rashid et al.
patent: 5532962 (1996-07-01), Auclair et al.
patent: 5570315 (1996-10-01), Tanaka et al.
patent: 5583812 (1996-12-01), Harari
patent: 5648934 (1997-07-01), O'Toole
patent: 5652720 (1997-07-01), Aulas et al.
patent: 5657332 (1997-08-01), Auclair et al.
patent: 5661053 (1997-08-01), Yuan
patent: 5675537 (1997-10-01), Bill et al.
patent: 5689465 (1997-11-01), Sukegawa et al.
patent: 5699297 (1997-12-01), Yamazaki et al.
patent: 5703506 (1997-12-01), Shook et al.
patent: 5712815 (1998-01-01), Bill et al.
patent: 5715193 (1998-02-01), Norman
patent: 5717632 (1998-02-01), Richart et al.
patent: 5751639 (1998-05-01), Ohsawa
patent: 5761125 (1998-06-01), Himeno
patent: 5774397 (1998-06-01), Endoh et al.
patent: 5798968 (1998-08-01), Lee et al.
patent: 5835413 (1998-11-01), Hurter et al.
patent: 5890192 (1999-03-01), Lee et al.
patent: 5905673 (1999-05-01), Khan
patent: 5909449 (1999-06-01), So et al.
patent: 5930167 (1999-07-01), Lee et al.
patent: 5937425 (1999-08-01), Ban
patent: 5963473 (1999-10-01), Norman
patent: 6046935 (2000-04-01), Takeuchi et al.
patent: 6145051 (2000-11-01), Estakhri et al.
patent: 6151246 (2000-11-01), So et al.
patent: 6199139 (2001-03-01), Katayama et al.
patent: 6222762 (2001-04-01), Guterman et al.
patent: 6345001 (2002-02-01), Mokhlesi
patent: 6415352 (2002-07-01), Asami et al.
patent: 6426893 (2002-07-01), Conley et al.
patent: 6456528 (2002-09-01), Chen
patent: 6522580 (2003-02-01), Chen et al.
patent: 6560152 (2003-05-01), Cernea
patent: 6567307 (2003-05-01), Estakhri
patent: 6678785 (2004-01-01), Lasser
patent: 6728134 (2004-04-01), Ooishi
patent: 6760255 (2004-07-01), Conley et al.
patent: 6763424 (2004-07-01), Conley
patent: 6772274 (2004-08-01), Estakhri
patent: 6925007 (2005-08-01), Harari et al.
patent: 6963505 (2005-11-01), Cohen
patent: 7012835 (2006-03-01), Gonzalez et al.
patent: 7477547 (2009-01-01), Lin
patent: 2005/0073884 (2005-04-01), Gonzalez et al.
patent: 2006/0039196 (2006-02-01), Gorobets et al.
patent: 2006/0062048 (2006-03-01), Gonzalez et al.
patent: 2006/0233023 (2006-10-01), Lin et al.
patent: 2007/0211532 (2007-09-01), Gonzalez et al.
patent: 2008/0158968 (2008-07-01), Moogat et al.
patent: 2008/0158969 (2008-07-01), Moogat et al.
patent: 0 791 933 (1999-06-01), None
patent: 2289779 (1995-11-01), None
patent: 8-147988 (1996-06-01), None
patent: 8-279295 (1996-10-01), None
patent: 2000-187992 (2000-07-01), None
patent: WO 9012400 (1990-10-01), None
patent: WO 02/058074 (2002-07-01), None
USPTO, “Office Action,” mailed in related U.S. Appl. No. 11/692,829, filed Apr. 17, 2008, 16 pages.
EPO/ISA, “Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration,” corresponding International Patent Application No. PCT/US2008/057422, mailed on Jul. 8, 2008, 12 pages.
Lee, E.K.F., et al., “Error Correction Technique for Multivalued MOS Memory,”Electronic Letters, vol. 27, No. 15 (Jul. 19, 1991) pp. 1321-1323.
Bui Tha-O
Davis , Wright, Tremaine, LLP
Luu Pho M.
Sandisk Corporation
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