Near field transducer for heat-assisted magnetic recording
US9343088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2014 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | May 19, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/943
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method for heat-assisted magnetic recording (HAMR) employing a near-field transducer (NFT) made of plasmonic ceramic materials or intermetallics are disclosed. The NFT is made of a plasmonic material as well as a protective outer layer, which provides for longer usefulness and improved performance of the NFT and recording device. The plasmonic materials used include but are not limited to TiNx, ZrNx, HfNx, TaNx, VNx, TiSi2−x, TiAlxNy, TiZrxNy, ZnO, SnO2, In2O3, RuO2, Lu2O3, WO2, and MgB2. Such materials, in combination with a protective layer, provide higher resistances and greater performance at temperatures required for HAMR, ranging from 300 up to 500 degrees Celsius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.