Integrated position sensor for a disk drive microacuator
US6194892A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Aug 7, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved micro-actuator position sensor which provides an accurate position signal for higher bandwidth control of a micro-actuator. The position sensor allows closed loop control of the micro-actuator position. Preferred embodiment micro-actuator sensors include a piezo-resistive stress sensor integrated within the springs, a capacitance sensor and magnetic reluctance sensor. Embodiments of the present invention are described in detail as integrated sensors for a micro-actuator used in hard disk drives. The sensor is integrated with a micro-actuator at the tip of the conventional actuator arm to improve the precision seeking capability of the actuator arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.