Multi-component dye compositions for optical recording media
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United States of America Patent
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Oct 6, 1998
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N/A
app pub date -
Nov 8, 1996
filing date -
Nov 8, 1996
priority date (Note) -
Expired
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Abstract
The present invention is directed to a dye composition for use in CD-R recording media and having reduced wavelength dependence of the dye layer absorption, comprising: (1) a first cyanine dye having a peak absorption wavelength in the solid film form in the range of about 690 nm to about 730 nm, the amount of said first cyanine dye is about 90% to about 30% by weight, based on the total weight of the solid components in said dye composition; and (2) at least one noncyanine dye having a peak absorption wavelength in the range of about 900 nm to about 1200 nm, each noncyanine dye having an absorption coefficient greater than 30,000 cm.sup.-1 and said amount of noncyanine dye is about 10% to about 40% by weight, based on the total weight of the solid components in said dye composition. The invention is also directed to a recordable medium coated with the above dye composition, and a recording mechanism implementing the above dye composition.
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