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Proceedings Paper

Advanced dual-layer phase-change optical disc
Author(s): Isao Satoh; Noboru Yamada
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Paper Abstract

Multi-layer optical recording is a promising technology for increasing a disc capacity using an optical pickup identical to that used for a single-layer optical disc. A capacity of 25 GB - 50 GB is required to record 2 - 4 hours HD-TV program. In this paper, the physical format of the dual-layer phase-change optical disc is studied and experimental results of an advanced dual-layer phase-change optical disc, of which first layer is characterized by a transmittance-balanced structure and prepared by a new replication process, are shown and discussed. The transmittance-balanced structure disc is realized by adopting Ge(Sn)-Sb-Te film that has appropriate optical constants and optimizing the thickness of dielectric layers. The signal of the second-layer in the transmittance-balanced structure disc is able to read and write without any influence of the first-layer. A capacity of over 50 GB is demonstrated by the transmittance-balanced structure disc.

Paper Details

Date Published: 9 April 2003
PDF: 7 pages
Proc. SPIE 5060, Sixth International Symposium on Optical Storage (ISOS 2002), (9 April 2003); doi: 10.1117/12.510287
Show Author Affiliations
Isao Satoh, Matsushita Electric Industrial Co., Ltd. (Japan)
Noboru Yamada, Matsushita Electric Industrial Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 5060:
Sixth International Symposium on Optical Storage (ISOS 2002)
Fuxi Gan; Zuoyi Li, Editor(s)

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