Bilayer magnetic structure for high density recording media
US6967061B1 · kind B1 · utility
2Cited by
16References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2000 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | Oct 12, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12931
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
High density longitudinal magnetic recording media are formed with two magnetic layers for enhanced SMNR, high signal, low PW 50 and high resolution. The bilayer magnetic structure comprises a first magnetic layer optimized for SMNR and a second magnetic layer formed directly on the first magnetic layer and optimized for Ms. Embodiments of the present invention include first and second magnetic layers containing Co, Cr and Pt, wherein the first magnetic layer has a higher Cr content than the second magnetic layer and the second magnetic layer has a higher Co content than the first magnetic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.