Embedded track information for patterned media
US8134796B2 · kind B2 · utility
1Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2010 |
| Grant date | Mar 13, 2012 |
| Priority date | — |
| Expiry date | Oct 14, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/855
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bit-patterned magnetic media (BPM) includes with respect to each data track a first sub-track and a second sub-track, each sub-track comprised of a plurality of bit-islands. A transducer head placed over a data track generates a readback signal. Channel response circuitry demodulates the readback signal and detects fine positioning information based on a comparison of a readback signal generated in response to the first sub-track and a readback signal generated in response to the second sub-track.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.