Non-contact measurement of slider fly height by electrostatic force
US7679857B2 · kind B2 · utility
13Cited by
29References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 27, 2008 |
| Grant date | Mar 16, 2010 |
| Priority date | — |
| Expiry date | Aug 27, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/6035
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a system and method for a non-contact measurement of the fly height of a slider above a magnetic data storage medium using electrostatic force, a slider with a read/write head flies over a magnetic data storage medium. A series of distinct voltages are applied between the slider and the magnetic data storage medium, and corresponding read-back signals are recorded. Using the recorded read-back signals, coefficients for an empirical curve-fit equation are calculated. The coefficients are normalized and converted into a fly height measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.