Data storage device detecting minimum stable fly height of a head over a disk
US9786309B1 · kind B1 · utility
2Cited by
19References
22Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 6, 2017 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jun 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data storage device is disclosed comprising a head actuated over a disk, wherein the head comprises a fly height actuator (FHA). A FHA control signal is applied to the FHA, wherein the FHA control signal comprises a DC component and an AC component. A fly height metric is measured representing a fly height of the head over the disk for different levels of the DC component. A modulation amplitude of the fly height metric is detected, and a minimum in the modulation amplitude of the fly height metric is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.