Patent ID: 8576654

Claim:
A non-volatile memory device, comprising: a plurality of memory blocks, each comprising: a main area including a plurality of first memory cells having a phase-change material; and a spare area including at least one second memory cell for storing initial information about the plurality of first memory cells, wherein a circuit of the at least one second memory cell is cut off according to the initial information, and the initial information is defective block information that is information about a defect of the plurality of memory blocks, and wherein the at least one second memory cell comprises: a phase-change element connected to a bit line; a switching element opening and closing a connection between the phase-change element and ground according to a signal applied via a word line; and a fuse layer that is opened by an electromagnetic wave, and wherein the fuse layer is arranged between the bit line and the phase-change element, between the phase-change element and the switching element, or between the switching element and the ground.