Integrated bidirectional Recording head micropositioner for magnetic storage devices
US6859346B1 · kind B1 · utility
Inventor
Key dates
| Filing date | Jan 13, 2003 |
| Grant date | Feb 22, 2005 |
| Priority date | — |
| Expiry date | Apr 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/1274
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Transducer elements of recording heads for magnetic storage media are moved independently in either of two directions with respect to the slider of the recording head. The motion is controlled using a micropositioner having magnetic coils integrated into the recording head. The transducer moves in the x direction between data tracks and in the z direction perpendicular to the surface of the magnetic storage medium. The micropositioners are used for small-scale positioning of the transducers over data tracks and to adjust fly heights. Because of the high minimum resonant frequencies and the low mass of the transducers, the micropositioners also improve settling times associated with track following. The micropositioners can be used during fabrication for dimensional control of recording head components. The motion of the transducers in the z direction enables the recording heads to be used reliably in the presence of asperities and changing ambient pressures and temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.