NAND FLASH MEMORY DEVICE AND METHOD OF WRITING DATA IN NAND FLASH MEMORY DEVICE

摘要

PURPOSE: A NAND flash memory device and a writing method thereof are provided to enhance the write speed property by copying back the data written on a spare block with a main block. CONSTITUTION: A plurality of pages is arranged in main blocks. The page is a basic unit of the write operation. A spare block is copied back with the main block in a standby state(509). A write data is programmed during inputting the write command(502). Spare blocks have the same cell array size as main blocks. Spare blocks share the same page buffer.