Multi-layer magnetic recording media
US5750270A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1995 |
| Grant date | May 12, 1998 |
| Priority date | — |
| Expiry date | Feb 7, 2015 |
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 improved multi-layer magnetic recording media and magnetoresistive drive systems incorporating the same. In particular, multi-layer media including alternating layers of cobalt or cobalt alloys and a precious metal, such as palladium or platinum, and a process to manufacture such media, are disclosed. Media in accordance with the invention generally include a substrate, a nucleating layer, a lattice, and a protective layer. In certain embodiments, the substrate is polished aluminum. In other embodiments, the thickness of the nucleating layer is thicker than 100 .ANG., and in certain embodiments between about 200 and about 600 .ANG.. The lattice, generally includes bilayers of cobalt (or an alloy thereof) and palladium or platinum. The thickness of the cobalt layers are between about 1.5 .ANG. and 10 .ANG., or between about 2 .ANG. and 7 .ANG., or between about 3 .ANG. and 5 .ANG.. The thickness of the palladium or platinum layers are between about 5 .ANG. and 15 .ANG., or between about 7 .ANG. and 12 .ANG., or between about 8 .ANG. and 11 .ANG.. The number of layers in the lattice 33, or its periodicity, is between about 10 and 30 or between about 1…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.