Optical information recording medium
AssigneeRicoh Company, Ltd.
InventorKiyoshi Tanikawa
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Abstract
An optical information recording medium capable of recording optical information thereon by application of high density energy beams thereto, the recorded information being thereafter reproducible therefrom, comprising a base and a recording layer formed on the base, the recording layer comprising a fluorine phthalocyanine of the following formula and capable of absorbing light with a wavelength of 700 nm or more: ##STR1## where M represents a member selected from the group consisting of hydrogen, a metal, a metal oxide and a metal halide, X represents fluorine; and n is an integer from 1 to 16.
Claims12
An optical information recording medium capable of recording optical information thereon by application of high density energy beams thereto, the recorded information being thereafter reproducible therefrom, comprising:
- a transparent base;
- and
- a recording layer on said base so that high density energy beams can be transmitted through said base and applied to said recording layer, said recording layer comprising a fluorophthalocyanine compound of the following formula and capable of absorbing light having a wave length of 700 nm or more:
- ##STR3## wherein M is a member selected from the group consisting of hydrogen, a metal, a metal oxide and a metal halide, X is fluorine, and n is an integer from 1 to 16.
Dependencies are inferred from the claim text.