Patent ID: 11894076
Assignee: SK HYNIX INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. An operating method of a nonvolatile memory device including a row of cells, the operating method comprising:
performing a foggy program operation to the row;
performing a foggy verification operation of verifying the foggy program operation by applying a foggy verification voltage, which is equal to or higher than a target threshold voltage, to the row and a foggy sensing voltage to columns of the respective cells;
performing a fine program operation to the row when the foggy program operation is verified as successful; and
performing a fine verification operation of verifying the fine program operation by applying a fine verification voltage, which is equal to the target threshold voltage, to the row and a fine sensing voltage, which is higher than the foggy sensing voltage, to the columns,
wherein the foggy program operation is verified as successful when a number of the cells each having a threshold voltage higher than the foggy verification voltage is greater than a first threshold, and
wherein the fine program operation is verified as successful when a number of the cells each having a threshold voltage lower than the foggy verification voltage is less than a second threshold.