Patent ID: 11901017
Assignee: SK HYNIX INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 15:
16. A method of operating a semiconductor memory device configured to perform a program operation on selected memory cells, wherein the program operation comprises a plurality of program loops, each of the plurality of program loops comprising a program pulse application operation and a program verify operation, wherein the program verify operation comprises:
determining a verify voltage to be used in a verify operation among first to 2N−1-th verify voltages, wherein N is a natural number of 2 or more;
applying a first precharge voltage or a second precharge voltage greater than the first precharge voltage to bit lines connected to the selected memory cells, based on whether a determined verify voltage is the first verify voltage among the first to 2N−1-th verify voltages; and
applying the determined verify voltage to a selected word line connected the selected memory cells.