Patent ID: 11894092
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. An erase method of a nonvolatile memory device, the erase method comprising:
receiving an erase command;
applying a first voltage, in a first erase mode based on the erase command, that causes a gate-source potential difference of a pass transistor connected to a word line to have a first value;
detecting a leakage current on the word line when the pass transistor is off;
identifying the word line, connected to the pass transistor that is turned off, as a fail word line; and
in a second erase mode, erasing a memory block connected to the word line as a second voltage is applied that causes the gate-source potential difference to have a second value greater than the first value.