Optical information recording medium

Details Optical information recording medium Optical information recording medium

1987-10-02

1988-08-30

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430271, 430 21, 430945, 430 49S, G03C 100

Patent

active

047676930

ABSTRACT:
This invention provides an optical information recording medium that has, on a substrate, a recording layer containing a cyanine dye represented by the general formula: ##STR1## (wherein, R.sub.1, R.sub.2 and R.sub.3 may be the same or different and each stands for a substituted or unsubstituted alkyl group; X stands for a perhalogenate ion, a toluenesulfonate ion or an alkylsulfate ion; n stands for an integrer of 0 or 1-3; a first halogen atom is present in at least one of each 4, 6 and 7-positions of the indole and indolenine rings; a second halogen atom may be present in each 5-position of said rings; and at lest one group consisting of alkyl, alkoxy, hydroxy, carboxy, allyl and alkylcarbonyl may be present in at least one of each 4, 5, 6 and 7-positions of said rings.) and, if necessary, a transition metal complex or a salt of said complex with a cation.

REFERENCES:
patent: 3761942 (1973-09-01), Lorenz et al.
patent: 4460665 (1984-07-01), Kunikane et al.
patent: 4583102 (1986-04-01), Tamura et al.

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