Heat-assisted magnetic recording head including a waveguide with dielectric cavity to reduce optical feedback
US10249326B1 · kind B1 · utility
17Cited by
5References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 17, 2018 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Jan 17, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording head has a near-field transducer proximate a media-facing surface of the recording head. A waveguide core overlaps and delivers light from a light source to the near-field transducer. The waveguide core has a dielectric cavity proximate the near-field transducer. The cavity is filled with a cladding material and reduces optical feedback to the light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.