Magneto-optical recording medium, and method for fabricating the same
AssigneeFujitsu Limited
InventorsTsutomu Tanaka, Ryo Kurita
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Abstract
This invention provides a magneto-optical recording medium forming method of laminating, on a substrate, three magnetic films having different compositions via at least a heat radiating layer, forming a dielectric film of a predetermined film thickness on the resulting structure, nitriding the magnetic films in an area where no information is to be recorded, and further laminating a material constituting the dielectric film on the resulting structure.
Claims10
A method for producing a magneto-optical recording medium, comprising
- laminating three magnetic films having different compositions on a substrate via at least a heat radiating layer,
- forming a dielectric film of a predetermined film thickness on the resulting structure,
- nitriding the magnetic films in an area where no information is to be recorded and
- laminating a material constituting the dielectric film on the resulting structure.
A method for producing a magneto-optical recording medium comprising the steps of
- laminating a first dielectric film, a heat radiating layer, and a second dielectric film in this order on a substrate,
- laminating a first magnetic film, a second magnetic film having a lower Curie temperature than the first magnetic film, and a third magnetic layer having a larger domain wall coercive force than the first magnetic film and a higher Curie temperature than the second magnetic film in this order on the second dielectric film,
- laminating a fourth dielectric film of a predetermined film thickness on the third magnetic film
- nitriding at least the third magnetic film in an area where no information is to be recorded and
- laminating a third dielectric film on the nitrided third magnetic film and the fourth dielectric film.
A magneto-optical recording medium comprising at least a first magnetic film having a relatively small domain wall coercive force, a second magnetic film having a relatively low Curie temperature, and a third magnetic film having a relatively large domain wall coercive force and a high Curie temperature laminated in this order,
- wherein the third magnetic film present in an area where no information is to be recorded is selectively nitrided.
Dependencies are inferred from the claim text.