Patent ID: 8488271
Filing Date: 2013-07-16
Classification: C09J,G11B

Abstract:
1. A disk drive device including: a hub, made of an electrically conductive material, which supports a recording disk; a bearing unit configured to rotatably support the hub and having electrical continuity when a rotation of the hub is stopped; a magnetic head configure to write and read data in the recording disk; a base member configured to support the bearing unit, the base member being made of a material containing aluminum as a main component and the base member having an oxide film thereon, an area of the oxide film on said base member being subject to dielectric breakdown, and the bearing unit and the base member being electrically connected by an electrically conductive adhesive adhered to the bearing unit and the area of said oxide film on the base member subject to dielectric breakdown, the electrically conductive adhesive having a conductive filler mixed therein; wherein the area of the oxide film on the base member subject to dielectric breakdown is sealed by the electrically conductive adhesive, and wherein an electrical contact resistance between the electrically conductive adhesive and the base member is 10 ohms or less.