Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
123 words
An optical recording medium comprising a substrate and at least each of a recording layer and a protective layer, said recording layer being formed on said substrate for recording information thereon or reading or erasing information on record thereon by light-irradiation on the recording layer, wherein the recording and erasing of information takes place through a phase transition between an amorphous phase and a crystalline phase in said recording layer, said recording layer comprising a solid solution of a palladium, antimony and tellurium alloy with germanium, telluride, and having a composition represented by the following formula: (M.sub.x Sb.sub.y Te.sub.1-x-y).sub.1-z (Te.sub.0.5 Ge.sub.0.5).sub.z wherein M is palladium; each of X, Y and Z represents the atomic fraction of respective elements; and 0.01≦X≦0.1, 0.35≦Y≦0.65 and 0.2≦Z≦0.4.
Claim 2
Dependent Claim
123 words
An optical recording medium comprising a substrate and at least each of a recording layer and a protective layer, said recording layer being formed on said substrate for recording information thereon or reading or erasing information on record thereon by light-irradiation on the recording layer, wherein the recording and erasing of information takes place through a phase transition between an amorphous phase and a crystalline phase in said recording layer, said recording layer comprising a solid solution of a palladium, antimony and tellurium alloy with germanium, telluride, and having a composition represented by the following formula: (M.sub.x Sb.sub.y Te.sub.1-x-y).sub.1-z (Te.sub.0.5 Ge.sub.0.5).sub.z wherein M is palladium; each of X, Y and Z represents the atomic fraction of respective elements; and 0.01≦X≦0.1, 0.35≦Y≦0.65 and 0.2≦Z≦0.4.
Claim 3
Dependent Claim
21 words
An optical recording medium according to claim 1, wherein said optical recording medium comprises a substrate/first protective layer/recording layer/second protective layer.
Claim 4
Dependent Claim
21 words
The optical recording medium according to claim 1, wherein said optical recording medium comprises a substrate/first protective layer/recording layer/second layer/reflective layer.
Claim 5
Dependent Claim
31 words
An optical recording medium according to claim 3, wherein the material of said reflective layer is hafnium (Hf), tantalum (Ta) or an alloy containing Hf or Ta as its principal component.
Claim 6
Dependent Claim
44 words
An optical recording medium according to claim 3, wherein said first protective layer is 50 nm˜300 nm thick, said second protective layer is 10 nm˜30 nm thick, said recording layer is 10 nm˜60 nm thick and said reflective layer is 20 nm˜100 nm thick.
Claim 7
Dependent Claim
44 words
An optical recording medium according to claim 3, wherein said first protective layer is 50 nm˜300 nm thick, said second protective layer is 150 nm˜250 nm thick, said recording layer is 10 nm˜60 nm thick and said reflective layer is 20 nm˜100 nm thick.
Claim 8
Dependent Claim
30 words
An optical recording layer according to claim 5, wherein the metal of said reflective layer is Au or Al or an alloy containing Au or Al as its principal component.
Claim 9
Dependent Claim
26 words
An optical recording medium according to claim 6, wherein the metal of said reflective layer is Hf or an alloy of Hf as its principal component.
Claim 10
Dependent Claim
44 words
An optical recording medium according to claim 5, wherein the composition of said recording layer is expressed by the following formula: (Pd.sub.x Sb.sub.y Te.sub.1-x-y).sub.1-z (Te.sub.0.5 Ge.sub.0.5).sub.z 0.01≦x≦0.1 0.35≦y≦0.45 0.2≦z≦0.4 where each of x, y, z and 0.5 represents the atomic fraction of each element.
Claim 11
Dependent Claim
44 words
An optical recording medium according to claim 6, wherein the composition of said recording layer is expressed by the following formula: (Pd.sub.x Sb.sub.y Te.sub.1-x-y).sub.1-z (Te.sub.0.5 Ge.sub.0.5).sub.z 0.01≦x≦0.1 0.45≦y≦0.65 0.2≦z≦0.4 where each of x, y, z and 0.5 represents the atomic fraction of each element.