Magneto-optical recording medium
AssigneeTeijin Limited
InventorsKiyoshi Chiba, Tetsuo Sato, Masahiko Sekiya, Kazutomi Suzuki
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Abstract
In the magneto-optical recording medium with a transparent substrate, a film of dielectric indium oxide, tin oxide or metallic Ti is interposed between the substrate and the recording layer, to prevent deterioration of the properties thereof.
Claims5
A magneto-optical recording medium comprising a transparent substrate made of synthesized resin, a magneto-optical recording layer, and a dielectric layer interposed between said magneto-optical recording layer and said transparent substrate wherein said dielectric layer is a dielectric, transparent, oxide film consisting of In.sub.2 O.sub.3, up to about 30 weight percent SnO.sub.2 based on the weight of said dielectric layer, and any impurities present being Ta, Sb of F, said layer having a volume resistivity of at least 1.times.10.sup.-1 Ohm.multidot.cm, said medium further comprising a protecting layer having a thickness no greater than 20 angstrome and consisting of a metallic titanium film between said dielectric layer and said magneto-optical recording layer.
A magneto-optical recording medium comprising a transparent substrate made of synthesized resin, a magneto-optical recording layer, and a dielectric layer interposed between said magneto-optical recording layer and transparent substrate, wherein said dielectric layer is a dielectric, transparent, oxide film consisting of In.sub.2 O.sub.3, up to about 30 weight percent SnO.sub.2 based on the weight of said dielectric layer, and any impurities present being Ta, Sb or F, said layer having a volume resistivity of at least 1.times.10.sup.-1 ohm.multidot.cm, further comprising a protecting layer having a thickness no greater than 20 angstrome and consisting of a metallic titanium film between said dielectric layer and said magneto-optical recording layer, and still further comprising a protecting layer covering said magneto-optical recording layer on its side opposite to the transparent substrate.
Dependencies are inferred from the claim text.