Optical recording medium

Details Optical recording medium Optical recording medium

1987-12-21

1988-09-13

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

430270, 430496, 430495, 430945, 430 21, 430269, G03C 172, G03C 178

Patent

active

047709758

ABSTRACT:
Disclosed herein is an optical recording medium permitting recording and reading-out of signals without any reflective layer. The optical recording medium comprises a transparent substrate and an optical recording layer provided directly on the substrate. The recording layer contains at least 80 wt. % of a naphthalocyanine dye represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be either the same or different and mean individually a straight-chain or branched alkyl group having 5-12 carbon atoms and M denotes a metal or a metal oxide or halide.

REFERENCES:
patent: 4458004 (1984-07-01), Tanikawa
patent: 4492750 (1985-01-01), Law et al.
patent: 4605607 (1986-08-01), Nikles et al.

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