Patent ID: 11887669
Assignee: SK HYNIX INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. The memory device according to claim 1,
wherein the unit program operation is performed in a mode selected among a first mode, a second mode, and a third mode,
wherein, the first mode is 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 a changed level of the threshold voltage, which is caused by the first program pulse,
wherein the second mode is 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 the changed level caused by the first program pulse, and
wherein the third mode is 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.