Heat assisted magnetic recording head having a plurality of diffusion barrier layers
US9449625B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2014 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Dec 24, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A heat assisted magnetic recording (HAMR) writer is described. The HAMR writer is coupled with a laser and has an air-bearing surface (ABS) that resides near a media during use. The HAMR writer includes a waveguide, a near-field transducer (NFT), a main pole, coil(s) and at least one of a first and a second diffusion barrier layer. The waveguide is optically coupled with the laser and directs energy from the laser toward the ABS. The NFT is optically coupled with the waveguide and focuses the energy onto a region of the media. The main pole writes to the region of the media. The main pole has a top, a bottom, and a plurality of sides. The first diffusion barrier layer is between at least the NFT and the bottom of the pole. The second diffusion barrier layer is adjacent to the plurality of sides of the main pole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.