On wafer laser stability control for heat-assisted magnetic recording
US10692525B2 · kind B2 · utility
7Cited by
7References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 2018 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Sep 20, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a substrate. A laser is formed on a non-self supporting structure and bonded to the substrate. A waveguide is deposited proximate the laser. The waveguide is configured to communicate light from the laser to a near-field transducer that directs energy resulting from plasmonic excitation to a recording medium. A light detector is configured to detect an amount of light. At least one laser heater is disposed proximate the laser. A controller is configured to control current supplied to the at least one heater based on the detected amount of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.