Patent ID: 11887678
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A programming method for a NAND flash memory device, comprising:
programming a selected page of the NAND flash memory device according to first and second programming data, wherein the selected page comprises a plurality of memory cells corresponding to a word line, and wherein the programming of the selected page comprises:
a plurality of programming operations using a plurality of programming voltages; and
a plurality of verifying operations, wherein ones of the plurality of verifying operations are performed after corresponding ones of the plurality of programming operations to determine whether programmed memory cells of the selected page have threshold voltage levels according to the first or second programming data;

performing a self-verification on the selected page, by the NAND flash memory device, to determine whether data stored at the selected page was overwritten; and
generating a fail indication upon determining that the data stored at the selected page was overwritten.