Optical recording medium
AssigneeSony Corporation
InventorHiroshi Tabata
Life of this patent
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Abstract
An optical recording medium includes a reflective layer, a first dielectric layer, a phase-change recording layer, and a second dielectric layer. The phase-change recording layer has an average composition represented by SbxInyMz, in which M is at least one of Mo, Ge, Mn, and Al, and x, y, and z are values in the ranges 0.70≤x≤0.92, 0.05≤y≤0.20, and 0.03≤z≤0.10, respectively, provided that x+y+z=1, the first dielectric layer includes a zirconium oxide-containing composite material or tantalum oxide, and the second dielectric layer includes a chromium oxide-containing composite material or silicon nitride.
Claims8
An optical recording medium, comprising:
- a reflective layer;
- a first dielectric layer;
- a phase-change recording layer;
- and
- a second dielectric layer,
- wherein the phase-change recording layer has an average composition represented by formula (1):
- SbxInyMz,
- wherein M is at least one of Mo, Mn, or Al, and x, y, and z are values in ranges 0.70≤x≤0.92, 0.05≤y≤0.20, and 0.03≤z≤0.10, respectively, provided that x+y+z=1,
- wherein the first dielectric layer comprises one of a zirconium oxide-containing composite material or tantalum oxide, and
- wherein the second dielectric layer comprises one of a chromium oxide-containing composite material or silicon nitride.
An optical recording medium, comprising:
- at least two recording layers, each recording layer of the at least two recording layers comprising
- a reflective layer,
- a first dielectric layer,
- a phase-change recording layer, and
- a second dielectric layer,
- wherein the phase-change recording layer has an average composition represented by formula (1):
- SbxInyMz,
- wherein M is at least one of Mo, Mn, or Al, and x, y, and z are values in ranges 0.70≤x≤0.92, 0.05≤y≤0.20, and 0.03≤z≤0.10, respectively, provided that x+y+z=1,
- wherein a first recording layer of the at least two recording layers is located deeper in the optical recording medium than a second recording layer of the at least two recording layers,
- wherein a sum of x and y in the first recording layer is smaller than the sum of x and y in second recording layer,
- wherein the first dielectric layer comprises one of a zirconium oxide-containing composite material or tantalum oxide, and
- wherein the second dielectric layer comprises one of a chromium oxide-containing composite material or silicon nitride.
Dependencies are inferred from the claim text.