Claims
- 1. An optical recording medium permitting recording and reading-out of signals, comprising a transparent substrate and an optically reflective recording layer provided directly on said substrate, said recording layer having an amount of resinous binder therein of substantially 0 wt. % and containing a napthalocyanine dye having the formula (I): ##STR4## wherein M is a metal, metal oxide or metal halide, and --OR.sub.1, --OR.sub.2, --OR.sub.3 and --OR.sub.4 are the same or different and denote ether groups, respectively, having R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each of which is a saturated or unsaturated hydrocarbon group having 4 to 12 carbon atoms.
- 2. The optical recording medium as claimed in claim 1, wherein said transparent substrate has a transmittance of light of 85% or higher, and is substantially free of optical anisotrophy.
- 3. The optical recording medium as claimed in claim 2, wherein said transparent substrate is a glass or plastic material.
- 4. The optical recording medium as claimed in claim 1, wherein said ether groups --OR.sub.1, --OR.sub.2, --OR.sub.3 and --OR.sub.4 are selected from the group consisting of n-butoxy, sec-butoxy, tert-butoxy, n-pentoxy, iso-pentoxy, sec-pentoxy, tert-pentoxy, n-hexoxy, iso-hexoxy, 1-methyl-1-ethylpropioxy, 1,1-dimethylbutoxy, n-heptoxy, iso-heptoxy, sec-heptoxy, tert-heptoxy, octoxy, 2-ethylhexoxy, nonyloxy, decyloxy, dodecyloxy, cyclohexyloxy, methylcyclohexyloxy, allyloxy, butenoxy, hexenoxy, octenoxy, dodecenoxy, cyclohexenoxy, methylcyclohexenoxy, phenoxy, methylphenoxy, ethylphenoxy, dimethylphenoxy, butylphenoxy, hexylphenoxy, benzyloxy, phenylethoxy and phenylhexoxy.
- 5. The optical recording medium as claimed in claim 1, wherein said metal, metal oxide or metal halide M is selected from the group consisting of a Group Ib metal, a Group II metal, a Group III metal, a Group IV metal, a Group V metal, a Group VI metal, a Group VIII metal, and a Group VIII metal and the oxides and halides thereof.
- 6. The optical recording medium as claimed in claim 5, wherein said metal, metal oxide or metal halide M is selected from the group consisting of Cu, Ni, Mg, Pd, Co, Nb, Sn, In, Ge, Ga, VO, TiO and the chloride, bromide or oxide of Al, Ga and In.
- 7. The optical recording medium as claimed in claim 6, wherein said metal, metal oxide or metal halide M is selected from the group consisting of VO, TiO, In, In--Cl, In--Br, Al--Cl, Al--Br, Ga--Cl, Ga--Br, Al--O--AI, Ga--O--Ga and In--O--In.
Priority Claims (1)
Number |
Date |
Country |
Kind |
60-186659 |
Aug 1985 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 898,021, filed Aug. 19, 1986, now U.S. Pat. No. 4,719,613.
US Referenced Citations (4)
Divisions (1)
|
Number |
Date |
Country |
Parent |
898021 |
Aug 1986 |
|