Heat-assisted magnetic recording device capable of preventing contaminant on the head
US10204655B1 · kind B1 · utility
6Cited by
6References
20Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 16, 2017 |
| Grant date | Feb 12, 2019 |
| Priority date | — |
| Expiry date | Oct 16, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Data is written to data sectors of a heat-assisted magnetic recording (HAMR) medium using a laser of a HAMR head supplied with a sum of an operational current and a threshold current. A service current is supplied to the laser when the head is over servo sectors of the medium, such that a temperature of the medium at the servo sectors is greater than or equal to a temperature of the head when over the servo sectors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.