Monitoring a fly height of a magnetic transducer
US7808734B2 · kind B2 · utility
3Cited by
6References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2007 |
| Grant date | Oct 5, 2010 |
| Priority date | — |
| Expiry date | Jan 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for monitoring a fly height of a magnetic transducer comprises flying the magnetic transducer at a distance of separation from a recording media. The fly height is modulated with a predetermined modulation frequency with a fly height control device. A read-back signal is read from the recording media with the magnetic transducer. A change of the read back signal is measured that results from modulating the fly height. A fault signal is provided in response to the change crossing a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.