Patent ID: 11881272
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 14:
15. A nonvolatile memory device comprising:
a memory cell region including at least one memory block and a first metal pad; and
a peripheral circuit region including a control circuit and a second metal pad, the peripheral circuit region being connected to the memory cell region through the second metal pad and the first metal pad,
the at least one memory block including a plurality of cell strings, each of the plurality of cell strings including a string selection transistor, a plurality of memory cells, and a ground selection transistor, the string selection transistor, the plurality of memory cells, and the ground selection transistors between a source line and a bit-line and connected in series in a vertical direction,
wherein the control circuit is configured to control a program operation by,
applying a second voltage to a selected word-line of the plurality of cell strings to precharge channels of the plurality of cell strings to a first voltage during a bit-line set-up period of each of a plurality of program loops;
applying the second voltage to unselected word-lines of the plurality of cell strings during a bit-line set-up period of a first program loop from among the plurality of program loops;
applying a negative voltage, which decreases in a step-wise manner as a number of the program loops increases, to the unselected word-lines of the plurality of cell strings during a bit-line set-up period of each of the plurality of program loops except the first program loop; and
applying a program voltage, which increases in a step-wise manner as the number of the program loops increases, to the selected word-line of the plurality of cell strings while applying a program pass voltage having a fixed levels to the unselected word-lines of the plurality of cell strings during a program execution period of each of the plurality of program loops.