Magnetic thin film medium comprising amorphous sealing layer for reduced lithium migration
US6120890A · kind A · utility
42Cited by
3References
20Claims
0Family size
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Key dates
| Filing date | Nov 5, 1998 |
| Grant date | Sep 19, 2000 |
| Priority date | — |
| Expiry date | Nov 5, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A glass or glass-ceramic substrate comprising about 0.5 to about 32 wt. % Li.sub.2 O is employed as a non-magnetic substrate of a magnetic recording medium. Migration of Li from the substrate to the medium's surface is prevented by forming an amorphous NiP sealing layer on the substrate, with an optional adhesion enhancement layer therebetween. Embodiments include surface oxidizing the amorphous NiP sealing layer for enhanced recording performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.