An integrated circuit package system includes forming a multi-tier substrate, and attaching a plurality of integrated circuits on the multi-tier substrate. This disc drive apparatus prevents floatation of the disc-shaped recording medium without causing cost increase. The block member is fittable into a rotor or drum type debarker. The thermal tempering causes the amorphous film to be transformed into a crystalline transparent conductive oxide film. The kinetic energy to be consumed in the collision is only the kinetic energy of the anchor.