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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsMotoyashi Murakami, Yuko Kawaguchi, Yasumori Hino
Estimating the term…
A magneto optical recording medium capable of stable recording and readout using a DWDD system is provided. The magneto optical recording medium of the present invention comprises an optical disk substrate and a multilayer recording film comprising essentially a readout layer, an intermediate layer, and a recording layer successively formed on top of the substrate. The readout layer has a smaller magnetic domain wall coercivity than the recording layer. The intermediate layer comprises a magnetic layer whose Curie temperature is lower than the readout layer and the recording layer. A recorded/readout magnetic domain corresponding to recorded/readout information is formed only in a groove area of the optical disk substrate. The thickness of the recording film at the boundary between mutually adjacent recording track areas is smaller than the thickness of the recording film in the center portions of the recording track areas.
(Amended) A magneto optical recording medium comprising a substrate and a multilayer recording film comprising a readout layer, an intermediate layer, and a recording layer that are successively formed on top of said substrate and are magnetically coupled with each other, wherein a recorded magnetic domain formed in said recording layer is copied into said readout layer and recorded information is read out by displacing a magnetic domain wall in said readout layer, said medium characterized in that:
A manufacturing method for a magneto optical recording medium comprising an optical disk substrate and a multilayer recording film comprising essentially a readout layer, an intermediate layer, and a recording layer successively formed on top of said optical disk substrate, said manufacturing method comprising the step of:
A readout method for a magneto optical recording medium in which a recorded magnetic domain formed in a recording layer is copied into a readout layer and recorded information is read out by displacing a magnetic domain wall in said readout layer, said readout method comprising a readout step comprising essentially:
A readout apparatus for a magneto optical recording medium in which a recorded magnetic domain in a recording layer is copied into a readout layer to form a copied magnetic domain therein and recorded information is read out by displacing a magnetic domain wall of said copied magnetic domain, said readout apparatus comprising:
Dependencies are inferred from the claim text.