An internal data processing apparatus and method in a mobile station. The outer element has at least one hollow space through which a heat exchange fluid can flow. As to a circuit that performs a verify operation, for instance, there is obtained a construction where the output from a sense amplifier that performs reading is connected to a switch which switches and operation voltage applied to a memory cell in accordance with a verify signal Sv, and the verify operation is finished concurrently with having the verifying signal Sv switched. Embodiments allow the replacement of dressings in such patients by a single care-giver. The first contact electrode is disposed at one side of the first semiconductor layer, and the second contact electrode is disposed at one side of the conduction substrate.