Anti-ferromagnetically coupled perpendicular magnetic recording media with oxide
US7842409B2 · kind B2 · utility
7Cited by
15References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 1, 2004 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | May 27, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to perpendicular magnetic recording media with improved signal-to-medium noise ratio (“SMNR”) and thermal stability, which media include a pair of vertically spaced-apart perpendicular ferromagnetic layers which are anti-ferromagnetically coupled (“AFC”) across a non-magnetic spacer layer. The invention is of particular utility in the fabrication of data/information storage and retrieval media, e.g., hard disks, having ultra-high areal recording/storage densities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.