In resist removal using hydrogen gas, the specific dielectric constant of an insulating film of a low dielectric constant can be reduced and the resist removal speed can be increased. The user interface component is set in an inactive operating mode, such as a keypad locking mode or a screen saver mode, for substantially non-active usage of the user interface component. 0 m to reduce energy generated when the V-belt and the V-pulleys are interfered with each other thereby reducing production of running noise during belt running.