Patent ID: 6678115
Filing Date: 2004-01-13
Classification: C10M,C10N,G11B

Abstract:
A disc drive storage system comprising:a housing having a central axis; a stationary member that is fixed with respect to the housing and coaxial with the central axis; a stator fixed with respect to the housing; a rotatable member that is rotatable about the central axis with respect to the stationary member; a rotor supported by the rotatable member and magnetically coupled to the stator; at least one data storage disc attached to and coaxial with the rotatable member; an actuator supporting a head proximate to the data storage disc for communicating with the disc; and a hydro bearing interconnecting the stationary member and the rotatable member and having working surfaces separated by a lubricating fluid comprising a base fluid and an additive for reducing the tendency of bubble formation in the lubricating fluid.