Recording media interlayer structure
US8025993B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2007 |
| Grant date | Sep 27, 2011 |
| Priority date | — |
| Expiry date | Mar 21, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/73923
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording medium comprises a layer stack formed over a surface of a non-magnetic substrate, and comprising, in overlying sequence from the surface: a magnetically soft underlayer; an interlayer structure for crystallographically orienting a layer of a perpendicular magnetic recording material formed thereon; and at least one crystallographically oriented, magnetically hard, perpendicular magnetic recording layer on the interlayer structure; wherein the interlayer structure is a triple-layer stacked structure comprising: a first interlayer of a first non-magnetic material proximal the magnetically soft underlayer and containing Ru; a second interlayer of a second non-magnetic material in overlying contact with the first interlayer and not containing Ru; and a third interlayer of a third non-magnetic material in overlying contact with the second interlayer and containing Ru.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.