Hitachi Global Storage Technologies Netherlands B.v.

Hitachi Global Storage Netherlands, B.v.

Richard Kroeker

John Thomas Contreras

Luiz M Franca-Neto

Bernhard E Knigge

Peter Michael Baumgart

Ta-Chang Fu

Thomas Edward Karis

Stanley Yen Wong

John Martin Burns

Gurinder P Singh

Andrew Keith Hanlon

Charles E Hignite

In a method of pre-contact detection and active damping of air bearing vibrations in a hard disk drive, a slider is isolated from ground. The slider is then capacitively coupled with a hard disk of the hard disk drive via a thermal fly-height control (TFC) heating element. An alternating current (AC) signal is applied to the slider via the TFC heating element to control the amplitude of the slider.

Method and system for pre-contact detection and active damping of air bearing vibrations in a hard disk drive

An improved disk drive system that employs a lubricant with improved charge control is provided. The disk drive system is comprised of a rotatably mounted magnetic disk. A rotor is coupled to the disk and rotatably retained by a stator. A bearing is formed that serves as an interface between the stator and the rotor. A motor coupled to the rotor rotates the magnetic disk via the rotor. Located in the bearing is a lubricant having a low relative electrical permittivity.

Disk drive system with hydrodynamic bearing lubricant having charge-control additive comprising dioctyldiphenylamine and/or oligomer thereof

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Morgan Hill, CA, United States of America

Richard Kroeker