Magnetic recording media with oxidized seedlayer for reduced grain size and reduced grain size distribution
US6620531B1 · kind B1 · utility
12Cited by
17References
19Claims
0Family size
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Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Dec 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
High areal recording density magnetic recording media with improved signal-to-noise ratio and high thermal stability are formed using oxidized seedlayers to reduce the magnetic grain size and grain size distribution. Embodiments include sputter depositing a NiAl or NiP seedlayer doped with an element having a higher oxidization potential than NiAl or NiP, such as Co or Ti, and oxidizing so that the oxidized dopant element is distributed substantially uniformly throughout the seedlayer to provide increased nucleation sites.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.