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Proceedings Paper

Phase-change media for high linear velocity and high recording density
Author(s): Tatsunori Ide; Norikazu Ohshima; Shuichi Ohkubo; Mitsuya Okada; Osamu Okada
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Paper Abstract

Overwrite characteristics have been studied for Ge-Sb-Te phase change media under high linear velocity conditions, ranging from 11.3 m/s to 22.6 m/s, with mark-edge-recording (MER). The Ge1Sb4Te7 recording layer composition was chosen for the rapid cooling structure to obtain a sufficient erase ratio under high linear velocity conditions. The optical optimization for the disk structure and the narrow-grooved substrate have been applied to improve erase characteristics with MER. The optical phase-difference-reproduction (PDR) has been studied to realize a high carrier to noise ratio (C/N). The pulse-width-reduction (PWR) recording compensation has been developed for high recording density. A 44.8 dB C/N was obtained for 0.68 micrometers minimum recording mark length. A -26.8 dB erase ratio was obtained at 22.6 m/s linear velocity.

Paper Details

Date Published: 13 August 1992
PDF: 6 pages
Proc. SPIE 1663, Optical Data Storage, (13 August 1992); doi: 10.1117/12.137555
Show Author Affiliations
Tatsunori Ide, NEC Corp. (Japan)
Norikazu Ohshima, NEC Corp. (Japan)
Shuichi Ohkubo, NEC Corp. (Japan)
Mitsuya Okada, NEC Corp. (Japan)
Osamu Okada, NEC Corp. (Japan)


Published in SPIE Proceedings Vol. 1663:
Optical Data Storage
Donald B. Carlin; David B. Kay; Alfred A. Franken, Editor(s)

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