Optical recording medium
AssigneeSony Corporation
InventorHIROSHI TABATA
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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,
- 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 comprises a zirconium oxide-containing composite material or tantalum oxide, and
- the second dielectric layer comprises a chromium oxide-containing composite material or silicon nitride.
An optical recording medium comprising
- at least two recording layers each 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,
- 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 sum of x and y in the recording layer located shallower than the recording layer most distant from a light-receiving side is larger than the sum of x and y in the most distant recording layer,
- the first dielectric layer comprises a zirconium oxide-containing composite material or tantalum oxide, and
- the second dielectric layer comprises a chromium oxide-containing composite material or silicon nitride.
Dependencies are inferred from the claim text.