NONVOLATILE MEMORY DEVICE AND OPERATING METHOD THEREOF

摘要

PURPOSE: A nonvolatile memory device and an operating method thereof are provided to improve reliability by reprogramming data of an adjacent sub-block which is affected by an erased sub-block. CONSTITUTION: A sub-block selected among sub-blocks of a memory block is erased(S110). It is verified whether the program states of memory cells in the remaining sub-blocks of the memory block are changed(S120). The remaining sub-blocks including the memory cells with the changed program states according to a verification result are entirely or partially reprogrammed(S140).