Optical information recording medium

Details Optical information recording medium Optical information recording medium

1990-03-20

1993-01-26

Wright, Lee C.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430495, 430945, 3461351, G03C 172, G11B 724

Patent

active

051821869

ABSTRACT:
An optical information recording medium for carrying out recording, readout or erasing by laser beam which comprises a support having carried thereon a recording layer containing dye(s) represented by the general formula (I): ##STR1## wherein R.sup.1 and R.sup.2 independently represent substituted or unsubstituted alkyl groups, substituted or unsubstituted alkenyl groups, or substituted or unsubstituted aryl groups, L represents a substituted or unsubstituted methine group, or a linking group formed by linkage of 3, 5 or 7 substituted or unsubstituted menthine groups through conjugated double bonds, Z represents an atomic group for completing an aromatic ring optionally having substituent(s), and X.sup.- represents a monovalent or divalent anion for neutralization of electron charge of the cationic part.
The present optical information recording media have adequate recording characteristics and have a dye recording layer which is capable of maintaining the characteristics over a long period and thus is excellent in stability.

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Patent Abstracts of Japan, vol. 9, No. 50, (p-339)(1773), Mar. 5, 1985, JP-A-59188854.

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