Preparation of cyanine dye for high density optical recording disk
AssigneesIndustrial Technology Research Institute, National Tsing Hua University
InventorsWen-Yih Liao, Chien-Liang Huang, Der-Ray Huang, Don-Yau Chiang, Andrew Teh Hu, Hong-Ji Lee, Shi-Jae Ye, Ying-Jen Kao
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Abstract
A cyanine dye for using in high density optical disc recording medium, having the following structure: ##STR1## wherein R represents 4-methoxycarbonyl benzyl group, X.sup.- represents an acid anion, and n represents an integer of 1 or 2. This cyanine dye is suitable for use as a .lambda.=450 nm.about.650 nm visible light-absorbing organic dye useful as a high density optical disc recording medium.
Claims15
A cyanine dye mixture (II and III) as high density optical recording disc, having the general structural formula:
- ##STR15## wherein R is 4-methoxycarbonyl benzyl group;
- X.sup.- is an acid anion;
- and
- n is 1 for cyanine dye (II) and n is 2 for cyanine dye (III).
Dependencies are inferred from the claim text.