Near field transducer anneal for heat assisted magnetic recording
US9424865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2014 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Nov 4, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0024
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for annealing a metal antenna of a near field optical transducer of a magnetic write element without inadvertently heat damaging the read element. A heating element is placed within a write head build in a cerf region outside of the active area of the read and write heads. A layer of thermally conductive, electrically insulating material is formed over the heating element to separate the heating element from the antenna. The thermally conductive, electrically insulating layer is preferably in contact with the antenna. A current can be applied to the heating element to heat the antenna to a temperature that is at or above the operating temperature of the optical transducer. After annealing, the heater element can be removed by the lapping process that is used to define the media facing surface of the head.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.