Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1989-07-24
1992-04-28
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
369283, 369286, 369288, G11B 1100, G11B 370
Patent
active
051093758
ABSTRACT:
A record carrier for thermomagnetic recording of information and magneto-optical readout of the recorded information. The record carrier includes a substrate and a recording layer thereon in the form of multi-layers of magnetic and non-magnetic material, the magnetic layers predominately containing cobalt and the non-magnetic layers predominantly containing transition metal. The magnetic and non-magnetic layers alternate, and the overall thickness of the complete multi-layer recording layer is less than 75 nm. Such a recording layer achieves a significant improvement in both thermomagnetic write properties and magneto-optical read properties.
REFERENCES:
patent: 4587176 (1986-05-01), Carcia
patent: 4635076 (1986-01-01), Willson
patent: 4678721 (1987-07-01), den Broeder
patent: 4731300 (1988-03-01), Watanabe
patent: 4753853 (1988-06-01), Sato
patent: 4789606 (1988-12-01), Yamada
patent: 4842956 (1989-06-01), Kobayashi
patent: 4882231 (1989-11-01), Aratani
patent: 4889756 (1989-12-01), Barzynski
Carcia Peter F.
Den Broeder Friedrich J. A.
Godlieb Willem F.
Greidanus Franciscus J. A. M.
Zeper Wouter B.
Eason Leroy
Levy Stuart S.
Nguyen Tan
U.S. Philips Corporation
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