System and method for detecting reader-writer offset in a heat-assisted magnetic recording head
US9564157B1 · kind B1 · utility
24Cited by
15References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Aug 21, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2525
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus comprises a heat-assisted magnetic recording head configured to write to and read from a magnetic recording medium. The head comprises a reader and a writer including a near-field transducer (NFT). The reader comprises a center which is laterally offset relative to a center of the writer to define a reader-writer offset (RWO) therebetween. A magnetic recording medium comprises a plurality of tracks. The plurality of tracks comprises at least one track used as a region to test for a shift in the RWO. A processor is coupled to the recording head and configured to detect the RWO shift.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.