Heat-assisted magnetic recording apparatus that modulates laser power to reduce differences between track widths of recorded marks
US11037597B1 · kind B1 · utility
1Cited by
18References
20Claims
0Family size
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Key dates
| Filing date | Jun 29, 2020 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Jun 29, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Two or more different elapsed time values are determined between transitions of a data signal applied to a magnetic write transducer of a heat-assisted magnetic recording apparatus. Two or more different power values of the laser are respectively associated with the two or more different elapsed time values. The two or more different power levels are selected to reduce differences between track widths of recorded marks having the two or more different elapsed time values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.