Tiltable device, in particular hard disk actuator device,...

Details Tiltable device, in particular hard disk actuator device,... Tiltable device, in particular hard disk actuator device,...

2006-03-07

2006-03-07

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

C360S078050, C360S234600, C360S294700, C360S245000

Reexamination Certificate

active

07009799

ABSTRACT:
In an actuator device for hard disks a suspension element carries a slider that is subject to undesired vibrations which give rise to rotations of the slider with respect to a nominal position. An electrostatically controlled position-control structure is arranged between the suspension and the slider and is controlled in an active way so as to generate torsions of the platform that counter the undesired rotations. The position-control structure comprises a platform of conductive material and control electrodes arranged underneath the platform. The platform is connected to a load-bearing structure by spring elements that enable movements of roll and pitch. Four control electrodes are arranged according to the quadrants of a square and can be selectively biased for generating electrical forces acting on the platform.

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Arkin, M., “Designing Head Positioning Servos: Challenges Ahead,”Data Storage, pp. 27-36, Oct. 1999.

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