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US 6,146,752 AGranted
Magneto-optical recording medium
AssigneeSeiko Epson Corporation
InventorsMasaya Ishida, Takeo Kawase
Life of this patent
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Abstract
A magneto-optical recording medium permitting satisfactory recording of information even at a small magnetic field in magnetic field modulation recording. The magneto-optical recording medium comprises a recording film formed by deposition of a recording layer and an antiferromagnetic layer. The thickness of the antiferromagnetic layer is 150 angstroms or less. When the Curie temperature of the recording layer is Tc1 and the Neel temperature of the antiferromagnetic layer is Tc2, Tc2 is higher than Tc1.
Claims17
A magneto-optical recording medium comprising:
- a substrate;
- a first dielectric layer deposited on said substrate;
- a recording layer deposited on said first dielectric layer;
- an anti-ferromagnetic layer deposited on said recording layer;
- a second dielectric layer deposited on said anti-ferromagnetic layer;
- and
- a reflection layer deposited on said second dielectric layer, wherein said anti-ferromagnetic layer has a thickness in a range from about 30 to about 90 angstroms.
4 more elements
A magneto-optical recording medium comprising:
- a substrate;
- a first dielectric layer deposited on said substrate;
- an anti-ferromagnetic layer deposited on said first dielectric layer;
- a recording layer deposited on said anti-ferromagnetic layer;
- a second dielectric layer deposited on said recording layer;
- and
- a reflection layer deposited on said second dielectric layer, wherein said anti-ferromagnetic layer has a thickness in a range from about 10 to about 90 angstroms.
4 more elements
Dependencies are inferred from the claim text.