System and method for detecting shifting of reader-writer offset in a heat-assisted magnetic recording head
US9418688B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2015 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Jul 29, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat-assisted magnetic recording head is configured to write data to and read data 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 controller is configured to control the writer to write data to data tracks of the medium, detect a shift in the RWO, and in response to the detected shift in the RWO, control the writer to write data to a plurality of tracks defining a reserved band during an open period of the reserved band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.