Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Physical dimension specified
Patent
1993-06-28
1997-09-16
Kiliman, Leszek
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Physical dimension specified
428336, 428694ML, 428694DE, 428694MM, 428694NF, 428694IS, 428694XS, 428694LE, 428694RE, 428900, 427127, 427128, 427129, 427130, 427131, 427132, 369 13, 369 14, G11B 566, B05D 512
Patent
active
056678878
ABSTRACT:
The present invention relates to a magneto-optical media. More particularly, the present invention relates to a device for assuring a high S/N ratio by controlling the optical phase difference of the media by optimizing the film structure of a multi-layered thin film. The structure of the multi-layered thin film is such that the first protective film of a thickness between 400 .ANG. and 700 .ANG., a recording film of a thickness between 150 .ANG. and 300 .ANG., the second protective film of a thickness between 150 .ANG. and 250 .ANG., and a reflecting film of a thickness between 400 .ANG. and 800 .ANG., are successively laminated on a substrate. The first protective layer and the second protective layer are both suitably made of AlSiN, SiN, or SiO.sub.2 having refractivity between 1.95 and 2.05. The recording layer has a composition:
REFERENCES:
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patent: 4740947 (1988-04-01), Ohta et al.
patent: 4792474 (1988-12-01), Murakami et al.
patent: 4838962 (1989-06-01), Takayama et al.
patent: 4939011 (1990-07-01), Takahashi et al.
patent: 5053287 (1991-10-01), Mizumoto et al.
Journal of Applied Physics, vol. 57, No. 8, Apr. 1985, Woodbury, NY, pp. 3891-3893, "Computation of Optical Properties of Multilayered Media for Magnetooptical Memories".
SPIE vol. 421 entitled "Optical Disks Systems and Applications" authored by Alan B. Marchant.
Kawase Takeo
Miyazawa Hiromu
Nebashi Satoshi
Ootsuki Shinya
Kiliman Leszek
Seiko Epson Corporation
Watson Mark P.
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