Patent ID: 8203879

Claim:
An operation method of a non-volatile memory, suitable for a multi-level cell having a first storage position and a second storage position, the operation method of the non-volatile memory comprising: setting a main voltage distribution group and a plurality of secondary voltage distribution groups for defining N levels, wherein each of the main voltage distribution group and the plurality of secondary voltage distribution groups comprises N threshold voltage distribution curves, corresponding to the N levels, wherein N is an integer greater than 2; selecting a first operation level and a second operation level from the N levels according to a programming command; programming the first storage position to the first operation level according to a threshold voltage distribution curve, corresponding to the first operation level, of the N threshold voltage distribution curves in the main voltage distribution group; and selecting a secondary voltage distribution group from the plurality of secondary voltage distribution groups according to the first operation level, and programming the second storage position to the second operation level according to a threshold voltage distribution curve, corresponding to the second operation level, in the selected secondary voltage distribution group.