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Proceedings Paper

Sub-Oxide Thin Films For An Optical Recording Disk
Author(s): Nobuo Akahira; Takeo Ohta; Noboru Yamada; Mutsuo Takenaga; Tadaoki Yamashita
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Paper Abstract

Thin films of SbOx, GeOx, TeOx, MoOx, InOx and PbOx ( x is smaller than the stoichiometric value for each component ) were found to have a feasibility to be applied to an optical recording disc. Upon heating, these thin films are critically changed in their optical constants at 150°, 280°, 120°, 150°, 120° and 100°C, respectively. The contrast ratios before to after heat treatment of the GeOx, TeOx and MoOx films of 1000 - 2000 Å thick are very high, they are 50, 20 and 15, respectively. Among them, the TeOx (x ≈1.1) film was excellent in both the sensitivity and the contrast ratio, and an optical recording disc was prepared by depositing the TeOx on a PMMA disc, substrate. Video-signals can be recorded and played back using a laser diode (λ =8300 Å, N.A.= 0.5) at the laser power of 6 - 8 mW incident. The carrier to noise ratio at 5 MHz was in excess of 55 dB.

Paper Details

Date Published: 27 May 1982
PDF: 7 pages
Proc. SPIE 0329, Optical Disk Technology, (27 May 1982); doi: 10.1117/12.933394
Show Author Affiliations
Nobuo Akahira, Matsushita Electric Industrial Co., Ltd. (Japan)
Takeo Ohta, Matsushita Electric Industrial Co., Ltd. (Japan)
Noboru Yamada, Matsushita Electric Industrial Co., Ltd. (Japan)
Mutsuo Takenaga, Matsushita Electric Industrial Co., Ltd. (Japan)
Tadaoki Yamashita, Matsushita Electric Industrial Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 0329:
Optical Disk Technology
Robert A. Sprague, Editor(s)

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