An engine includes a throttle valve provided to an intake passage and a turbocharger, which includes an exhaust turbine and an intake compressor. In a fixing unit 19 in which this apparatus is applied, a fixing belt 112 is an annular member that has an inner peripheral surface and an outer peripheral surface, and produces heat through the action of magnetic flux. The methods further improve the MOS device characteristics such that a MOS device with a quantum well is created.