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Proceedings Paper

High Performance Magneto-Optical Disk Using A New Plastic Substrate
Author(s): Toshio Niihara; Shinkichi Horigome; Ryoichi Sudou; Hiroyuki Suzuki; Masafumi Yoshihiro; Norio Ohta
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Paper Abstract

To realize high data rate and high reliability 5.25 inch Magneto-Optical(MO) disks, suitable materials for a tri-layer structure(substrate/Kerr enhancement layer/magnetic layer/protective layer) and substrates were studied. By optimizing the composition of TbFeCo film, micron-size and regular-shaped recorded domains were obtained. SiNx film showed enough Kerr rotation enhancement and good protectivity to be used as an enhancement layer and a protective layer for a TbFeCo magnetic film. Those films were constructed on newly developed plastic substrates of photocurable casting resin(PHC) which have as low retardation and as high heat-resistance as glass/2p(photo-polymerization) substrates. MO disks with the tri-layer structure on PHC showed high reliability even in severe circumstances.

Paper Details

Date Published: 2 June 1988
PDF: 6 pages
Proc. SPIE 0899, Optical Storage Technology and Applications, (2 June 1988); doi: 10.1117/12.944621
Show Author Affiliations
Toshio Niihara, Hitachi Ltd. (Japan)
Shinkichi Horigome, Hitachi Ltd. (Japan)
Ryoichi Sudou, Hitachi Ltd. (Japan)
Hiroyuki Suzuki, Hitachi Maxell Ltd. (Japan)
Masafumi Yoshihiro, Hitachi Maxell Ltd. (Japan)
Norio Ohta, Hitachi Ltd. (Japan)

Published in SPIE Proceedings Vol. 0899:
Optical Storage Technology and Applications
Donald B. Carlin; Albert A. Jamberdino; Yoshito Tsunoda, Editor(s)

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