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). The problem occurs most pronouncedly...http://www.google.com/patents/US7196946?utm_source=gb-gplus-sharePatent US7196946 - Compensating for coupling in non-volatile storage
