Flexible storage medium for write-once optical tape

Andrew J.G. Strandjord; Steven P. Webb; Donald J. Perettie; Robert A. Cipriano

doi:10.1117/12.137567

13 August 1992 Flexible storage medium for write-once optical tape

Andrew J.G. Strandjord, Steven P. Webb, Donald J. Perettie, Robert A. Cipriano

Proceedings Volume 1663, Optical Data Storage; (1992) https://doi.org/10.1117/12.137567
Event: Optical Data Storage Topical Meeting, 1992, San Jose, CA, United States

Abstract

A write-once data storage media has been developed which is suitable for optical tape applications. The media is manufactured using a continuous film process to deposit a ternary alloy of tin, bismuth, and copper. This laser sensitive layer is sputter deposited onto commercial plastic web as a single-layer thin film. A second layer is sequentially deposited on top of the alloy to enhance the media performance and act as an abrasion resistant hard overcoat. The media was observed to have laser write sensitivities of less than 2.0 njoules/bit, carrier-to-noise levels of greater than 50 dBs, modulation depths of approximately 100%, read-margins of greater than 35, uniform grain sizes of less than 200 angstroms, and a media lifetime that exceeds 10 years. Prototype tape media was produced for use in the CREO drive system. The active and overcoat materials are first sputter deposited onto three mil PET film in a single pass through the vacuum coating system, and then converted down into multiple reels of 35 mm X 880 m tape. One mil PET film was also coated in this manner and then slit and packaged into 3480 tape cartridges.

Citation Download Citation

Andrew J.G. Strandjord, Steven P. Webb, Donald J. Perettie, and Robert A. Cipriano "Flexible storage medium for write-once optical tape", Proc. SPIE 1663, Optical Data Storage, (13 August 1992); https://doi.org/10.1117/12.137567

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