Heat-assisted magnetic recording head with near-field transducer having first and second surface-plasmonic plates
US10770098B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 3, 2019 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Oct 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A write head includes a first surface-plasmonic plate proximate a magnetic pole and recessed from a media-facing surface of the write head. A bottom surface of the first surface-plasmonic plate faces away from the magnetic pole and towards a waveguide core. The first surface-plasmonic plate is formed of a first material having lower-loss in plasmonic coupling than a second material, the second material being more mechanically robust than the first material. A second surface-plasmonic plate is formed of the second material and located on the bottom surface of the first surface-plasmonic plate. A lower edge of the second surface-plasmonic plate extends closer to the media-facing surface than the first surface-plasmonic plate. An upper edge of the second surface-plasmonic plate is slanted in a downtrack direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.