System that compensates for coupling based on sensing a neighbor using coupling
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United States of America Patent
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Jun 28, 2011
Grant Date -
Jul 23, 2009
app pub date -
Sep 8, 2008
filing date -
Jul 20, 2006
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Abstract
Shifts in the apparent charge stored on a floating gate (or other charge storing element) of a non-volatile memory cell can occur because of the coupling of an electric field based on the charge stored in adjacent floating gates (or other adjacent charge storing elements). To compensate for this coupling, the read or programming process for a given memory cell can take into account the programmed state of an adjacent memory cell. To determine whether compensation is needed, a process can be performed that includes sensing information about the programmed state of an adjacent memory cell (e.g., on an adjacent bit line or other location).
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