Optical information recording medium

Details Optical information recording medium Optical information recording medium

1984-09-18

1986-07-15

Ives, P. C.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428199, 428216, 4284111, 428913, 430271, 430495, 430945, 3461351, 346 76L, B32B 316, B32B 2300, B32B 702

Patent

active

046006257

ABSTRACT:
An optical information recording medium being capable of writing and reading with laser beam which comprises forming, on a transparent or opaque substrate, a thin film (recording layer) containing a cyanine coloring matter represented by the general formula: ##STR1## (wherein, R.sup.1, R.sup.2 and R.sup.3 may be the same or different, and each stands for C.sub.1 -C.sub.6 alkyl; X stands for halogen, perhalogenate, boron tetrafluoride, toluenesulfonic acid or alkylsulfonic acid; A stands for a benzene ring or a naphthyl ring and a substituent such as alkyl, alkoxy, hydroxy, carboxyl, halogen, allyl or alkylcarboxyl may be or may be not present on each ring; and n is an integer of 1-3.).

REFERENCES:
patent: 4415621 (1983-11-01), Specht et al.
patent: 4460665 (1984-07-01), Kunikane et al.
patent: 4465767 (1984-08-01), Oba et al.
J. Griffiths, Colour & Constitution of Organic Molecules, 1976, pp. 245-250.
Color Index, 3rd Ed., V. 4, 1971, pp. 4438, 4440.

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