| 摘要 |
An object of the present invention is to provide an involatile memory device that is capable of writing and erasing data at a time other than during manufacturing, and a semiconductor device having the memory device. Also, an object of the present invention is to provide a compact-sized and inexpensive involatile memory device and a semiconductor device having the memory device. The memory device of the present invention has a pair of conductive layers and an organic compound having a liquid crystal property that is interposed between the pair of conductive layers. Data is recorded in the memory device by applying a first voltage to the pair of conductive layers and heating the organic compound, to cause a phase change of the organic compound from a first phase to a second phase.
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