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US 5,627,012 AGranted
Method for preparing phase change optical recording medium
AssigneeTDK Corporation
InventorsJunji Tominaga, Ryo Inaba, Susumu Haratani
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AssigneeTDK Corporation
InventorsJunji Tominaga, Ryo Inaba, Susumu Haratani
Estimating the term…
An optical recording medium is prepared by forming on a substrate a phase change recording layer comprising elements A, B, C and optional D wherein A is silver and/or gold, B is antimony and/or bismuth, C is tellurium and/or selenium, D is indium or a mixture of indium and aluminum and/or phosphorus. Formation of the recording layer is carried out by the step of sputtering an A--C base metal and the step of sputtering a B base metal optionally containing D in this successive order or reverse order; or by the step of sputtering an A--C base metal, the step of sputtering a B base metal, and the step of sputtering a D base metal in this successive order or reverse order. Since the resulting recording layer is already crystallized, the method eliminates a need for extra initialization.
A method for preparing an optical recording medium comprising the step of forming a phase change recording layer on a substrate, said recording layer comprising a recording material containing elements A, B and C, wherein A is at least one element of silver and gold, B is at least one element of antimony and bismuth, and C is at least one element of tellurium and selenium,
A method for preparing an optical recording medium comprising the step of forming a phase change recording layer on a substrate, said recording layer comprising a recording material containing element B and a low Tx metal wherein B is at least one element of antimony and bismuth,
Dependencies are inferred from the claim text.