Phase-change media for high linear velocity and high recording density

Tatsunori Ide; Norikazu Ohshima; Shuichi Ohkubo; Mitsuya Okada; Osamu Okada

doi:10.1117/12.137555

13 August 1992 Phase-change media for high linear velocity and high recording density

Tatsunori Ide, Norikazu Ohshima, Shuichi Ohkubo, Mitsuya Okada, Osamu Okada

Proceedings Volume 1663, Optical Data Storage; (1992) https://doi.org/10.1117/12.137555
Event: Optical Data Storage Topical Meeting, 1992, San Jose, CA, United States

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.

Citation Download Citation

Tatsunori Ide, Norikazu Ohshima, Shuichi Ohkubo, Mitsuya Okada, and Osamu Okada "Phase-change media for high linear velocity and high recording density", Proc. SPIE 1663, Optical Data Storage, (13 August 1992); https://doi.org/10.1117/12.137555

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