Disk drive calibrating a laser write power for heat assisted magnetic recording
US8897103B2 · kind B2 · utility
12Cited by
24References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2011 |
| Grant date | Nov 25, 2014 |
| Priority date | — |
| Expiry date | May 17, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A disk drive is disclosed comprising a head actuated over a disk, wherein the head comprises a laser for heating the disk while writing data to the disk. The disk drive receives write commands, and increases a power of the laser to a write power for heating the disk while writing data to the disk. A calibration interval is adjusted based on the power applied to the laser over time, and the write power is calibrated at the calibration interval.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.