Dye-containing layer of a film-forming polymeric binder and the use thereof in an information recording element
AssigneeU.S. Philips Corporation
InventorsDirk J. Zwanenburg, Wilhelmus P. M. Nijssen, Caspert G. I. van der Staak
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Abstract
Dye-containing layer of a film-forming polymeric binder and the application thereof in an information recording element. The invention relates to a dye-containing layer in which dye, if desired in a very large weight percentage is dissolved or finely divided in a copolymer (1:1) of methyl vinyl ether and maleic anhydride or a semi-ester thereof. The dye-containing layer is particularly suitable for use as a recording layer in an optical information recording element.
Claims6
An information recording element for optically recording optically readable information comprising a disc-shaped substrate on one surface of which there is present an optically readable servo track which has at least partially a relief structure of servo areas situated alternatively at a higher and a lower level and on which servo track there is present, as a recording layer, a mixture of a dye and a copolymer (1:1) of methyl vinyl ether and maleic anhydride or a semi-ester of said copolymer and an aliphatic alchohol which may be substituted with an aromatic radical and contains 1-8 carbon atoms.
Dependencies are inferred from the claim text.