Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2007-03-31
2009-11-17
Auduong, Gene N. (Department: 2827)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185210, C365S185240
Reexamination Certificate
active
07619930
ABSTRACT:
After erasing a plurality of non-volatile storage elements, a soft programming process is performed to tighten the erase threshold distribution for the non-volatile storage elements. During the soft programming process, the system identifies the number of programming pulses needed for a first set of the non-volatile storage elements to complete the soft programming and the number of programming pulses needed for the all but a last set of non-volatile storage elements to complete soft programming. These two numbers are used to characterize the threshold distribution of the non-volatile storage elements. This characterization of the threshold distribution and the program pulse step size are used to limit the number of verify pulses used during subsequent programming.
REFERENCES:
patent: 5132935 (1992-07-01), Ashmore
patent: 5270979 (1993-12-01), Harari
patent: 5295107 (1994-03-01), Okazawa
patent: 5576992 (1996-11-01), Mehrad
patent: 5680350 (1997-10-01), Lee
patent: 5920507 (1999-07-01), Takeuchi
patent: 5930174 (1999-07-01), Chen
patent: 6031766 (2000-02-01), Chen
patent: 6137729 (2000-10-01), Choi
patent: 6172909 (2001-01-01), Haddad
patent: 6243290 (2001-06-01), Kurata et al.
patent: 6252803 (2001-06-01), Fastow
patent: 6288938 (2001-09-01), Park
patent: 6438037 (2002-08-01), Fastow
patent: 6522580 (2003-02-01), Chen
patent: 6522585 (2003-02-01), Pasternak
patent: 6587903 (2003-07-01), Roohparvar
patent: 6590811 (2003-07-01), Hamilton
patent: 6639844 (2003-10-01), Liu
patent: 6654287 (2003-11-01), Visconti
patent: 6657891 (2003-12-01), Shibata
patent: 6661711 (2003-12-01), Pan
patent: 6684173 (2004-01-01), Kessenich
patent: 6711056 (2004-03-01), Abedifard
patent: 6714459 (2004-03-01), Hirano
patent: 6735114 (2004-05-01), Hamilton
patent: 6735116 (2004-05-01), Lee
patent: 6798698 (2004-09-01), Tanaka
patent: 6925004 (2005-08-01), Shibata
patent: 7016226 (2006-03-01), Shibata
patent: 7023737 (2006-04-01), Wan
patent: 7073103 (2006-07-01), Gongwer
patent: 7092290 (2006-08-01), Hemink
patent: 7139198 (2006-11-01), Guterman et al.
patent: 7145806 (2006-12-01), Kawai
patent: 7173859 (2007-02-01), Hemink
patent: 7177199 (2007-02-01), Chen
patent: 7196928 (2007-03-01), Chen
patent: 7289365 (2007-10-01), Shuto
patent: 2002/0186594 (2002-12-01), Visconti
patent: 2004/0109362 (2004-06-01), Gongwer
patent: 2005/0162916 (2005-07-01), Guterman
patent: 2006/0140011 (2006-06-01), Fong
patent: 2006/0274583 (2006-12-01), Lutze
patent: 2008/0198660 (2008-08-01), Mokhlesi
patent: 2008/0198661 (2008-08-01), Mokhlesi
patent: 2008/0198664 (2008-08-01), Mokhlesi
patent: 2008/0198665 (2008-08-01), Mokhlesi
Notice of Allowance, dated Feb. 17, 2009, U.S. Appl. No. 11/694,987, filed Mar. 31, 2007.
Notice of Allowance, dated Feb. 26, 2009, U.S. Appl. No. 11/694,989, filed Mar. 31, 2007.
Notice of Allowance, dated Feb. 27, 2009, U.S. Appl. No. 11/694,991, filed Mar. 31, 2007.
U.S. Appl. No. 11/377,972, filed Mar. 17, 2006, System for Performing Read Operation on Non-Volatile Storage with Compensation for Coupling, by Mokhlesi.
U.S. Appl. No. 11/548,264, filed Oct. 10, 2006, Variable Program Voltage Increment Values in Non-Volatile Memory Program Operations, by Li.
U.S. Appl. No. 11/616,647, filed Dec. 27, 2006, Method for Programing with Initial Programming Voltage Based on Trial, by Kamei.
International Search Report, dated Jun. 16, 2008, PCT Appl. No. PCT/US2008/053858, filed Mar. 31, 2007.
Written Opinion of the International Searching Authority, dated Jun. 16, 2008, PCT Appl. No. PCT/US2008/053858, filed Mar. 31, 2007.
U.S. Appl. No. 11/694,993, filed Mar. 31, 2007.
Notice of Allowance dated Jul. 17, 2009, U.S. Appl. No. 11/694,991, filed Mar. 31, 2007.
Notice of Allowance, dated Mar. 31, 2009, U.S. Appl. No. 11/694,987, filed Mar. 31, 2007.
Notice of Allowance, dated Mar. 23, 2009, U.S. Appl. No. 11/694,990, filed Mar. 31, 2007.
Notice of Allowance dated Sep. 1, 2009, U.S. Appl. No. 11/694,991, filed Mar. 31, 2007.
Auduong Gene N.
SanDisk Corporation
Vierra Magen Marcus & DeNiro LLP
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