Near-field transducer with Au nano rod
US10872628B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 2020 |
| Grant date | Dec 22, 2020 |
| Priority date | — |
| Expiry date | Feb 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A near field transducer (NFT) is formed between a waveguide and main pole at an air bearing surface (ABS). The NFT includes a rod-like front portion (PG1) and a substantially triangular shaped back portion (PG2) with a dielectric separation layer therebetween. PG1 is formed on a first dielectric layer with thickness t1 and refractive index (RI1) while PG2 is on a second dielectric layer with thickness t2 and having refractive index (RI2) where t1>t2, and RI1>RI2 while PG1 has a tapered backside at angle 45+15 degrees to promote efficient energy transfer from PG2 to PG1 and reduce NFT heating. A dielectric layer that induces poor adhesion with PG1 may be inserted between below PG1 at the ABS to cause Au recession to occur at the PG1 leading side thereby preventing voids at the PG1 trailing side and ensuring good ADC performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.