Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1996-11-14
1999-11-23
Kiliman, Leszek
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428336, 428694ML, 428694SC, 428694NF, 428694MM, 428694IS, 428900, 369 13, G11B 566
Patent
active
059897058
ABSTRACT:
A magneto-optical recording disk includes a recording layer for recording information as a mark and a reproduction layer, laminated with the recording layer, to which magnetization direction of the recording layer is transferred at high temperatures, wherein the reproduction layer and the recording layer are magnetostatically coupled and are not exchange-coupled. The information is read out by using a temperature distribution generated by a light beam for reproduction. The recording layer has, on a side thereof to which the reproduction layer is not provided, a supplementary back layer of a soft magnetic material composed of ferromagnetic material. The magneto-optical disk is designed to generate good CNR and thereby improves recording density even when a short mark is reproduced.
REFERENCES:
patent: 4966821 (1990-10-01), Kawashima
patent: 5248565 (1993-09-01), Tsutsumi
patent: 5512366 (1996-04-01), Nakaki
patent: 5529854 (1996-06-01), Shimoda
patent: 5533001 (1996-07-01), Watanabe
patent: 5543221 (1996-08-01), Kitakami
patent: 5723227 (1998-03-01), Matsumoto
Copy of Communication dated Jul. 17, 1998, issued by the German Patent Office re corresponding German Pat. Appln. No. 196 46 896.5-53; and a translation of same.
K. Tamanoi, et al., Proceedings of Magneto-Optical Recording International Symposium, Magnetically-Induced Super Resolution Using Magneto-Static Coupling, J. Magn. Jpn. vol. 19, Supplement No. S1, pp. 421-424, 1995.
Hirokane Junji
Murakami Yoshiteru
Nakajima Junsaku
Takahashi Akira
Conlin David G.
Gamache Richard E.
Kiliman Leszek
Sharp Kabushiki Kaisha
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