Extremely durable CD-ROM with a novel structure

H. Yamaguchi; Y. Tsukamoto; Fumito Watanabe; Akinobu Sato; Masanori Saito; Hiroko Honda; Michio Murahata; M. Yanagisawa; Toshio Tsuno

doi:10.1117/12.45913

1 July 1991 Extremely durable CD-ROM with a novel structure

H. Yamaguchi, Y. Tsukamoto, Fumito Watanabe, Akinobu Sato, Masanori Saito, Hiroko Honda, Michio Murahata, M. Yanagisawa, Toshio Tsuno

Author Affiliations +

Proceedings Volume 1499, Optical Data Storage '91; (1991) https://doi.org/10.1117/12.45913
Event: Optical Data Storage, 1991, Colorado Springs, CO, United States

Abstract

This paper describes an extremely durable CD-ROM and its reliability. A pit pattern was fabricated through a sol-gel process utilizing a 2P/epoxy work stamper. Excellent stability was guaranteed by a layered structure, such as the SiO₂-ZrO₂ over coat on a chemical strengthening glass substrate and the Si/SiO₂-ZrO₂/Cr tri- layered reflector on a sol-gel layer. Accelerated tests were implemented to estimate its lifetime. The CD-ROM lifetime at 30 degree(s)C (DOT) 90% RH was estimated to be more than 300 years. This exceedingly long lifetime was determined on the basis of the following two experimental results. Little degradation was observed in Cl error rate during about 50 days at 120 degree(s)C (DOT) 90% RH. A main degradation mode, which was observed on longer aging, was Cr film peeling-off. It was found that activation energy for Cr peeling-off process was 0.91 eV by an in-situ peeling detection tester, based on the acoustic emission method.

Citation Download Citation

H. Yamaguchi, Y. Tsukamoto, Fumito Watanabe, Akinobu Sato, Masanori Saito, Hiroko Honda, Michio Murahata, M. Yanagisawa, and Toshio Tsuno "Extremely durable CD-ROM with a novel structure", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); https://doi.org/10.1117/12.45913

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