| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a NAND flash memory device capable of detecting an error occurring during a copyback operation without additional delay time, and preventing two-bit error in one page by ending a copyback program operation when the error occurs during the copyback operation, and to providr a copyback program method. <P>SOLUTION: The NAND flash memory device includes a cell array for storing data, a page buffer configured to copyback read the data, and an error detector for detecting an error which has occurred during a copyback reading operation. Error detection is performed in parallel with the copyback program operation, and completes before finishing a copyback program verify operation. When a detection signal is a pass signal, the data stored in the page buffer is subjected to copyback programming. When the detection signal is a fail signal, the copyback operation ends without executing the copyback program. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
