Deformation Recording Process In Polymer-Metal Bilayers And Its Use For Optical Storage

Jean A. Cornet

doi:10.1117/12.936053

10 November 1983 Deformation Recording Process In Polymer-Metal Bilayers And Its Use For Optical Storage

Jean A. Cornet

Proceedings Volume 0420, Optical Storage Media; (1983) https://doi.org/10.1117/12.936053
Event: 1983 Optical Mass Data Storage Conferences, 1983, Arlington, United States

Abstract

A non-antireflective polymer-metal bilayer structure, encapsulated inside a closed cons-truction/is used for digital data storage in the Thomson-CSF Gigadisc. In this paper, a simple model is presented for microdeformation recording in the medium. This model enables a good understanding of the readout signal as a function of the recording power and leads to some practical consequences. Useful polymers and metallic layers are identified and the disc performance is reported. It is shown that recording using laser diodes can be performed at bit rate up to 14 Mbits.s^-1 with a laser power of 7 mW at the disc entry face, in case of a 1200 rpm disc speed. Moreover a working range of 4 m_W, as defined by a 3 dB attenuation, is demonstrated. Discs from pilot production exhibit raw bit error rates at the level of 2.10^-5. For usual environmental conditions, the disc behaviour is compatible with shelf-and archival life at scale of 10 years. Finally, the processes for both layers deposition and disc construction are easy and cost effective. It is concluded that Giaadisc can successfully enter today the market place.

Citation Download Citation

Jean A. Cornet "Deformation Recording Process In Polymer-Metal Bilayers And Its Use For Optical Storage", Proc. SPIE 0420, Optical Storage Media, (10 November 1983); https://doi.org/10.1117/12.936053

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