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Flexible storage medium for write-once optical tapeA write-once data storage media was 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 50dB's, modulation depths of approximately 100 percent, 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 35mm x 880m tape. One mil PET film was also coated in this manner and then slit and packaged into 3480 tape cartridges.
Document ID
Document Type
Conference Paper
Strandjord, Andrew J. G.
(Dow Chemical Co. Midland, MI, United States)
Webb, Steven P.
(Dow Chemical Co. Midland, MI, United States)
Perettie, Donald J.
(Dow Chemical Co. Midland, MI, United States)
Cipriano, Robert A.
(Dow Chemical Co. Midland, MI, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: NASA. Goddard Space Flight Center, Goddard Conference on Mass Storage Systems and Technologies, Volume 1,
Subject Category
Documentation And Information Science
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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