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Proceedings Paper

Overwritable region of high- and low-light intensity for overwriting on a magnetic triple-layer disk
Author(s): Ariyoshi Nakaoki; Yoshihiro Mutoh; Shintarou Tanaka; Takashi Shimouma; Kaoruko Asano; Katsuhisa Aratani; Masahiko Kaneko; Kenjiro Watanabe
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Paper Abstract

High and low laser power for overwriting was investigated by measuring bit error rate using exchange-coupled triple-layer films. The experimental results revealed that the overwritable region depends both on the state of the medium before overwriting and on the recording pattern. The overwritable region was found to be the least when random data for (2,7) code modulation are overwritten on the initial interface wall state -- the all written state. A margin of was obtained for the low power even under the severest conditions. A laboratory prototype overwriting drive established that the triple-layer disk is applicable to a practical use with a low error rate and that data can be rewritten in about a half time required by the conventional system.

Paper Details

Date Published: 1 August 1990
PDF: 7 pages
Proc. SPIE 1316, Optical Data Storage, (1 August 1990); doi: 10.1117/12.22020
Show Author Affiliations
Ariyoshi Nakaoki, Sony Corp. (Japan)
Yoshihiro Mutoh, Sony Corp. (Japan)
Shintarou Tanaka, Sony Corp. (Japan)
Takashi Shimouma, Sony Corp. (Japan)
Kaoruko Asano, Sony Corp. (Japan)
Katsuhisa Aratani, Sony Corp. (Japan)
Masahiko Kaneko, Sony Corp. (Japan)
Kenjiro Watanabe, Sony Corp. (Japan)

Published in SPIE Proceedings Vol. 1316:
Optical Data Storage

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