Optical information recording medium
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United States of America Patent
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Apr 5, 1988
Grant Date -
N/A
app pub date -
Jun 26, 1986
filing date -
Jul 10, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical information recording medium comprises a plastic substrate and a recording layer containing an indole type polymethine compound wherein the substituents attached to N atoms in the indole and indolene rings must be different from each other. The compound provides high solubility in alcoholic solvents, high storage stability (light resistance, heat resistance, etc.) and the like.
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