Optical information recording material
AssigneeFuji Photo Film Co., Ltd.
InventorsMinoru Wada, Yonosuke Takahashi, Eiichi Hasegawa
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Abstract
An optical information recording material which comprises a substrate having thereon a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, a reflecting layer made of a metal, and a heat insulating layer interposed between said recording layer and said reflecting layer. The material makes it possible to record information at high sensitivity and read recorded information by reflected light at high contrast.
Claims18
An optical information recording material which comprises a substrate having thereon a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, the metal compound being selected from the group consisting of CrS, Cr.sub.2 S, Cr.sub.2 S.sub.3, MoS.sub.2, MnS, FeS, FeS.sub.2, CoS, Co.sub.2 S.sub.3, NiS, Ni.sub.2 S, PdS, Cu.sub.2 S, Ag.sub.2 S, In.sub.2 S.sub.3, InS, GeSx (1.ltoreq..times..ltoreq.2), SnS, SnS.sub.2, PbS, As.sub.2 S.sub.3, Sb.sub.2 S.sub.3, Bi.sub.2 S.sub.3, MgF.sub.2, CaF.sub.2, RhF.sub.3, MoO, InO, In.sub.2 O.sub.3, GeO, PbO, SnO, and SnO.sub.2, the metal being selected from the group consisting of Mg, Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Si, Ge, Sn, As, Sb, Bi, Se, Te, mixtures thereof, and alloys thereof, a reflecting layer made of a metal wherein the metal used in said reflecting layer is a metal which can be used in said recording layer, and a heat insulating layer interposed between said recording layer and said reflecting layer.
A method for recording information comprising irradiating a light beam on an optical information recording material which comprises a heat mode recording layer made of a metal and a metal compound that increases the sensitivity of said recording layer and decreases the reflectivity of said recording layer, the metal compound being selected from the group consisting of CrS, Cr.sub.2 S, Cr.sub.2 S.sub.3, MoS.sub.2, MnS, FeS, FeS.sub.2, CoS, Co.sub.2 S.sub.3, NiS, Ni.sub.2 S, PdS, Cu.sub.2 S, Ag.sub.2 S, In.sub.2 S.sub.3, InS, GeSx (1.ltoreq..times..ltoreq.2), SnS, SnS.sub.2, PbS, As.sub.2 S.sub.3, Sb.sub.2 S.sub.3, Bi.sub.2 S.sub.3, MgF.sub.2, CaF.sub.2, RhF.sub.3, MoO, InO, In.sub.2 O.sub.3, GeO, PbO, SnO, and SnO.sub.2, the metal being selected from the group consisting of Mg, Sc, Y, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Mn, Re, Fe, Co, Ni, Ru, Rh, Pd, Ir, Pt, Cu, Ag, Au, Zn, Cd, Al, Ga, In, Si, Ge, Sn, As, Sb, Bi, Se, Te, mixtures thereof, and alloys thereof, a reflecting layer made of a metal wherein the metal used in said reflecting layer is a metal which can be used in said recording layer, and a heat insulating layer interposed between said recording layer and said reflecting layer, said layers being supported on a substrate.
Dependencies are inferred from the claim text.