Patent ID: 8098522

Claim:
An operation method of a non-volatile memory, suitable for a multi-level cell (MLC) having a first storage position and a second storage position, the operation method of the non-volatile memory comprising: setting N threshold-voltage distribution curves, wherein the N threshold-voltage distribution curves correspond to N levels, and N is an integer greater than 2; programming the first storage position to the 1 st level according to the 1 st threshold-voltage distribution curve, and programming the second storage position to an auxiliary level according to a threshold-voltage auxiliary curve located apart from the 1 st threshold-voltage distribution curve for a sensing window when the first and the second storage positions are programmed to the 1 st level and the N th level; and programming the first and the second storage positions to the i th level according to the i th threshold-voltage distribution curve when the first and the second storage positions are not programmed to the 1 st level and the N th level, wherein i is an integer and 1≦i≦N.