Patent ID: 11915762
Assignee: SK HYNIX INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. The memory system according to claim 11, wherein:
the program mode corresponding to a second program pulse applied after the first program pulse is determined as one selected from a first mode, a second mode, and a third mode, the first mode to apply the second program pulse to change or adjust a threshold voltage of the at least one non-volatile memory cell by a first level which is equal to, or larger than, that caused by the first program pulse; the second mode to apply the second program pulse to change or adjust the threshold voltage of the at least one non-volatile memory cell by a second level which is smaller than that caused by the first program pulse; and the third mode to apply the second program pulse to the at least one non-volatile memory cell of which a change of the threshold voltage is inhibited.