Amorphous magnetic recording medium, process for producing the same and magnetic recording and reproduction apparatus
US6699602B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Mar 1, 2002 |
| Grant date | Mar 2, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12618
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An amorphous magnetic recording medium comprising a substrate and an amorphous magnetic layer, where a magnetic domain formation-controlling layer comprising a main phase and 1 to 3 kinds of discrete spherical isolating phases arranged horizontally in lines in the main phase or 1 to 3 kinds of discrete spherical phases vertically stacked one upon another in the main phase is formed on the top side or the bottom side directly or through at least one of other layers to bring the amorphous magnetic layer into a finer magnetic domain structure, can satisfy high density recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.