Magnetic microactuator with capacitive position sensor
US6798609B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2000 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Jan 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4826
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disc drive system includes a recording disc rotatable about an axis, a slider supporting a transducing head for transducing data with the disc, and a dual-stage actuation assembly supporting the slider to position the transducing head adjacent a selected radial track of the disc. The dual-stage actuation assembly includes a support structure supporting the slider in proximity to a surface of the disc, a microactuator and a capacitive position sensor. The support structure is coarsely positionable by a main actuator. The microactuator includes a stator attached to the support structure and a movable rotor operatively attached to the slider, the rotor being connected to the stator by at least one flexible beam. The capacitive position sensor connects the stator to the rotor, and provides a relative position signal representing a state of displacement of the microactuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.