Patent ID: 7212376
Filing Date: 2007-05-01
Classification: C10M,C10N,F16C,G11B

Abstract:
1. A disk drive system comprising: a rotatably mounted magnetic disk; a rotor coupled to the magnetic disk; a stator for rotatably retaining the rotor; a bearing that serves as an interface between the stator and the rotor, wherein the bearing is selected from a journal bearing, a thrust bearing, a spiral groove bearing, a herringbone groove bearing, or wherein the bearing is formed from surfaces that are embossed with grooves to create an internal pressure within a lubricant; a motor coupled to the rotor for rotating the magnetic disk via the rotor; and the lubricant disposed in the bearing, wherein the lubricant is comprised of a lubricating medium and a charge-control additive for reducing charge accumulation in the bearing, and wherein the charge-control additive is comprised of dioctyldiphenylamine, an oligomer comprising dioctyldiphenylamine, or a combination of the foregoing.