Optical information recording method and medium
AssigneeFuji Photo Film Co., Ltd.
InventorNaoki Saito
Life of this patent
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Abstract
An optical information recording medium includes a substrate having disposed thereon a recording layer that is recordable by irradiating the recording layer with a laser having a wavelength of 450 nm or less. The recording layer contains a specific phthalocyanine derivative. An optical information recording method uses the medium.
Claims16
1-12. (canceled)
A method of recording information on an optical information recording medium by irradiating the medium with a laser having a wavelength no greater than 450 nm, wherein the medium comprises a substrate having disposed thereon a recording layer on which information is recordable by irradiating the medium with laser light having a wavelength no greater than 450 nm, wherein the recording layer contains a phthalocyanine compound and has a refractive index (n) in a range of 1.5<n<1.9 and an extinction coefficient (k) in a range of 0.04<k<0.15.
An optical information recording medium used in a method of recording information by irradiating the medium with a laser having a wavelength no greater than 450 nm, wherein a recording layer of the optical information recording medium is disposed on a substrate and contains a phthalocyanine compound represented by Formula (I):
- wherein Rα1 to Rα8 and Rβ1 to Rβ8 each independently represents one selected from the group consisting of a hydrogen atom, an alkylsulfonyl group having 1 to 20 carbon atoms, an arylsulfonyl group having 6 to 14 carbon atoms, and an aralkylsulfonyl group having 7 to 15 carbon atoms;
- and M represents two hydrogen atoms, a metal, a metal oxide, or a metal having a ligand;
- and
- wherein the recording layer has a refractive index (n) in a range of 1.5<n<1.9 and an extinction coefficient (k) in a range of 0.04<k<0.15.
Dependencies are inferred from the claim text.