Tiltable device, in particular hard disk actuator device, with roll and pitch angle active control
US7009799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2002 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Jul 24, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.