Patent ID: 7626867

Claim:
A method for accessing a memory, wherein the memory comprises a plurality of memory cells, the distribution of threshold voltages at each memory cell comprises level 0˜level 3 from low to high in order, the method for accessing memory comprises: receiving at least one piece of data; boosting the threshold voltages of the memory cells targeted to the level 1, the level 2 and the level 3 from the threshold voltages corresponding to the level 0 to the threshold voltages corresponding to the level 1; boosting the threshold voltages of the memory cells targeted to the level 2 and the level 3 from the threshold voltages corresponding to the level 1 to the threshold voltages corresponding to the level 2; and boosting the threshold voltages of the memory cells targeted to the level 3 from the threshold voltages corresponding to the level 2 to the threshold voltages corresponding to the level 3.