A semiconductor device which reduces a noise superimposed upon a signal carried on an interconnection or cross-talk. A sheet-like electrode for electric double layer capacitors, which electrode comprises a sheet-like electrode of carbon fine powder and a fluorine-containing polymer resin and, laminated thereon, the reinforcing sheet, and an electric double layer capacitor having this electrode. A power amplifier receives a reference current and the voltage feedback. To facilitate the data service, a host driver embedded in an application server connects an application and its data to a cluster. An embodiment of the cartridge loading and unloading mechanism of the present invention can be powered by the same drive motor assembly that is used to move or transport the cartridge to the optical head assembly used for writing andor reading of data from the disk medium of the cartridge. By flowing a heat transfer liquid in the tubes and adjusting the gas pressure in the spaces, localized temperature of the component body can be precisely controlled.