Optical recording media

Details Optical recording media Optical recording media

1995-10-13

1997-08-19

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

43027016, 4302702, 430945, G11B 724

Patent

active

056587074

ABSTRACT:
An optical recording medium has a recording layer, a reflective layer and a protective layer, all of which are arranged on a substrate. The recording layer contains a porphyrin compound represented by the following formula (1): ##STR1## wherein R.sub.1 to R.sub.8 independently represent a hydrogen atom, an alkyl group, an alkoxy group, an alkylcarbonyl group, an alkoxycarbonyl group, an alkylthio group or a halogen atom, R.sub.9 to R.sub.12 independently represent a hydrogen atom or an alkyl group, and X.sup.- represents an anion.

REFERENCES:
patent: 4798891 (1989-01-01), Franck et al.
patent: 4873131 (1989-10-01), Kashima et al.
patent: 5090009 (1992-02-01), Hamada et al.
patent: 5124067 (1992-06-01), Itoh et al.
patent: 5486437 (1996-01-01), Iwamura et al.
Agnew. Chem. Int. Ed. Engl. 25 (1986), No. 12 pp. 1100-1101, "Synthesis of a Fourfold Enlarged Porphyrin with an Extremely Large, Diamagnetic Ring-Current Effect".
Jpn. J. Appl. Phys. vol. 31 (1992), pp. L249-L251, "Third-Order Optical Nonlinearities in Porphyrins with Extended .pi.-Electron Systems".

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