Multilayer thin-film media for optical recording

Bala Subramanian

doi:10.1117/12.22381

1 December 1990 Multilayer thin-film media for optical recording

Bala Subramanian

Proceedings Volume 1323, Optical Thin Films III: New Developments; (1990) https://doi.org/10.1117/12.22381
Event: 34th Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1990, San Diego, CA, United States

Abstract

A write-once optical data storage media has been developed which is suitable for tape formats. The recording layer is a metal alloy system which is sputter deposited onto polymeric substrates as a single-layer thin film. The media are manufactured using a continuous sheet process, where the reflectivity of the film at 840nm can be selectively varied between 30 and 70%. These films have been characterized for laser write sensitivity, optical properties, surface chemistry, and environmental stability. An abrasion resistant hard overcoat is applied directly onto the active surface in a second vacuum deposition step. The media performance has been found to be compatible with direct hard-overcoats with no degradation in write sensitivity.

Citation Download Citation

Bala Subramanian "Multilayer thin-film media for optical recording", Proc. SPIE 1323, Optical Thin Films III: New Developments, (1 December 1990); https://doi.org/10.1117/12.22381

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