High coercivity longitudinal recording media and method for its preparation
US5824409A · kind A · utility
28Cited by
4References
16Claims
0Family size
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Key dates
| Filing date | Nov 13, 1995 |
| Grant date | Oct 20, 1998 |
| Priority date | — |
| Expiry date | Nov 13, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A high coercivity longitudinal recording media comprising FePt or similar thin films that are vacuum deposited by RF and DC sputtering. The as-deposited multilayered films are subjected to vacuum annealing. Due to the formation of the ordered phases of FePt or the like, which have very high crystal anisotropy, the annealed FePt films have large coercivity and fine grain size, suitable for use as ultra-high density magnetic recording media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.