Method of removing head contamination during contact detection
US9858953B1 · kind B1 · utility
5Cited by
14References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 31, 2017 |
| Grant date | Jan 2, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of removing contamination from a magnetic recording head during contact detection, including the steps of setting a heat actuator at a first power level, dwelling at the first power level for a specified length of time, removing contamination from the head during the specified dwell time, oscillating the heat actuator from the first power level to a second level that is lower than the first level while detecting periodic contact between the head and an adjacent disk, calculating the amplitude of the detected periodic contact, and correlating the calculated amplitude to a clearance distance between the head and the disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.