Method and manufacture process for exchange decoupled first magnetic layer
US8697260B2 · kind B2 · utility
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19Claims
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Key dates
| Filing date | Jul 25, 2008 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Oct 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A perpendicular magnetic recording medium having a dual-layer magnetic film is disclosed. The bottom layer is completely exchange decoupled, and the top layer contains a certain amount of exchange coupling optimized for recording performance. Preferably, the bottom magnetic layer contains stable oxide material (for example, TiO2) and other non-magnetic elements (for example, Cr). A method of manufacturing the media is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.