Magnetic recording system with single coil for thermally assisted writing
US6671127B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2001 |
| Grant date | Dec 30, 2003 |
| Priority date | — |
| Expiry date | Feb 6, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thermally-assisted magnetic recording (TAMR) write head simultaneously generates heat and a magnetic write field to the recording layer on a magnetic recording disk. The write head is located on the trailing face of a head carrier in a TAMR disk drive and comprises a single turn coil, part of which is a current strip having an edge located at the disk-facing surface of the head carrier. When write current is passed through the current strip heat is generated at the edge of the strip and a magnetic write field is induced at the disk surface. The strip edge has a predetermined width that substantially corresponds to the desired track width of the data bits. Because both heat and the magnetic write field are generated by the same element, the heat gradient and the magnetic write field gradient are co-located on the spot where the data bit is written.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.