Method and system for providing a PMR head having an antiferromagnetically coupled pole
US7911737B1 · kind B1 · utility
160Cited by
5References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2007 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Oct 19, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/3163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The method and system for providing a perpendicular magnetic recording (PMR) head are described. The method and system include providing a metal underlayer and a PMR pole on the metal underlayer. The metal underlayer is amorphous. The PMR pole has a bottom and a top wider than the bottom. The PMR pole includes at least a first ferromagnetic layer, a second ferromagnetic layer, and a third ferromagnetic layer. The first ferromagnetic layer is antiferromagnetically coupled with the second ferromagnetic layer. The second ferromagnetic layer is antiferromagnetically coupled with the third ferromagnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.