Phase-change recording medium, recording method and recorder therefor
OwnerShuichi Ohkuboinventor
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Abstract
A phase-change recording medium of the present invention includes a reflection layer, a first protective layer, a phase-change recording layer which changes in phase between a crystallization state and an amorphous state by irradiation of a laser beam, and a second protective layer. The phase-change recording layer contains a component expressed by MzSiy(SbxTe1-x)1-y-z (where 0.65≦x≦0.8, 0.1≦y+z≦0.2, M represents Ge, AgIn, AuIn, or AgAuIn) as a main component. Further, in the phase-change recording medium of the present invention, an absorptivity Ac of the phase-change recording layer in the crystallization state is set higher than an absorptivity Aa of the phase-change recording layer in the amorphous state.
Claims19
A phase-change recording medium for recording and reproducing information by irradiating a laser beam, comprising a reflection layer, a first protective layer, a phase-change recording layer which changes in phase between a crystallization state and an amorphous state by irradiation of a laser beam, and a second protective layer, wherein the phase-change recording layer contains a component expressed by MzSiy(SbxTe1-x)1-y-z (where 0.65≦x≦0.8, 0.1≦y+z≦0.2, M represents Ge, AgIn, AuIn, or AgAuIn) as a main component.
A phase-change recording medium for recording and reproducing information by irradiating a laser beam, comprising a reflection layer, a first protective layer, a phase-change recording layer which changes in phase between a crystallization state and an amorphous state by irradiation of a laser beam, and a second protective layer, wherein the phase-change recording layer contains a component expressed by Gey(SbxTe1-x)1-y (where 0.02≦y≦0.15, 0.65≦x≦0.84) as a main component, and an absorptivity Ac of the phase-change recording layer in the crystallization state is higher than an absorptivity Aa of the phase-change recording layer in the amorphous state.
Dependencies are inferred from the claim text.