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Proceedings Paper

Direct overwritable magneto-optical exchange-coupled multilayered disk by laser power modulation recording
Author(s): Jun Saito; Hideki Akasaka
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Paper Abstract

In 1987, we presented a direct overwritable Magneto-Optical exchange coupled Multilayered (DOW) disk by laser power modulation recording. Since then two major improvements of DOW were announced, namely 3- layered and 4-layered DOW disks, based on the 2-layered DOW disk, From the view point of merits and demerits, we compare the DOW disk with other direct overwritable optical disks, magnetic field modulation recording type of MO disk and phase change type of optical disk. As a latest topic, the recording power margin of the DOW scheme is explained. Adding metal coat to the DOW MO thin films is effective to expand the recording power margin. We have achieved (+/- 10%)2 allowance for direct overwriting power margin of PH and PL. Perspectives of the DOW disk for the next generation MO disk memory system are mentioned.

Paper Details

Date Published: 1 July 1991
PDF: 11 pages
Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); doi: 10.1117/12.45947
Show Author Affiliations
Jun Saito, Nikon Corp. (Japan)
Hideki Akasaka, Nikon Corp. (Japan)

Published in SPIE Proceedings Vol. 1499:
Optical Data Storage '91
James J. Burke; Thomas A. Shull; Nobutake Imamura, Editor(s)

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