Accelerating thermal decay of a harmonic-ratio reference track
US9595279B1 · kind B1 · utility
2Cited by
5References
20Claims
0Family size
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Key dates
| Filing date | Oct 28, 2015 |
| Grant date | Mar 14, 2017 |
| Priority date | — |
| Expiry date | Oct 28, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/607
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A reference track written to a magnetic recording medium includes at least two harmonics that facilitate measuring a clearance between a read/write head and the recording medium. A magnetic field is applied to the reference track that accelerates a thermal decay of the reference track without erasing data of the reference track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.