Patent Document ID: 8451665
Application ID: 13232304

Base Claim:
1. A method for operating a non-volatile memory device, comprising: performing an erase operation on a second word line group different from a first word line group of a plurality of word lines in response to an erase command and an address corresponding to the erase command; selecting a word line of the plurality of word lines in response to a program command and an address corresponding to the program command; determining whether the selected word line is a word line set among the plurality of word lines; performing an erase operation on the first word line group of the plurality of word lines in response to a result of the determining; and performing a program operation on the selected word line.

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Claim 3:
3. The method of claim 1 , wherein the performing of the erase operation on the first word line group comprises: floating the second word line group of the word lines that are different from the first word line group; and applying an erase voltage to the first word line group.