Patent ID: 7525758
Filing Date: 2009-04-28
Classification: G11B

Abstract:
1. A disk device comprising: a case having a plate-shaped base formed of a non-magnetic material and having an open upper surface, a plate-shaped top cover formed of a non-magnetic material and attached to the base to cover the open upper surface of the base, a first plating layer formed of a magnetic material and covering an outer surface of the base, and a second plating layer formed of a magnetic material, covering an outer surface of the top cover, and conductively connected to the first plating layer; a disk-shaped recording medium which is arranged in the case and which has a substrate, a soft magnetic backing layer formed on the substrate, and a magnetic recording layer formed so as to overlap the soft magnetic backing layer and having perpendicular magnetic anisotropy; and a mechanical unit including a head which performs information processing with respect to the recording medium, a head actuator supporting the head, and a drive motor which supports and rotates the recording medium and is disposed on the base.