| 摘要 |
According to an embodiment of the present invention, a multi-layered memory apparatus comprises: a plurality of memory devices arranged in a multi-layered state; and a control unit for controlling data recording, data deleting, and data reading operations on the memory device. The control unit supplies refresh voltage by setting a period of refresh voltage supplied to a memory device arranged in a lower part longer than a period of refresh voltage supplied to a memory device arranged in an upper part. |
