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US 2003/0205353 A1Published application
Soft magnetic alloy fiber, manufacturing method for soft magnetic alloy fiber, and information recording article using soft magnetic alloy fiber
AssigneeKabushiki Kaisha Toshiba
InventorsTakao Sawa, Katsutoshi Nakagawa, Hisashi Takahashi, Teruo Murakami, Masao Obama
Life of this patent
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Abstract
A soft magnetic alloy fiber has a width of 10 μm or more to less than 500 μm, a thickness of 2 μm or more to less than 20 μm, and a Curie temperature of −50° C. or higher.
Claims22
A soft magnetic alloy fiber having a width of lOam or more to less than 500 μm, a thickness of 2 μm or more to less than 20 μm, and a Curie temperature of −50° C. or higher.
An information recording article comprising:
- a base;
- and
- a soft magnetic alloy fiber having a width of 10 μm or more to less than 500 μm, a plate thickness of 2 μm or more to less than 20 μm, and a Curie temperature of −50° C. or higher which is embedded in the base.
A manufacturing method for a soft magnetic alloy fiber, comprising the steps of:
- dissolving a soft magnetic alloy material in a crucible with a nozzle having an opening with a diameter of 0.1 to 0.2 mm or a slit having a short side of 0.07 to 0.15 mm in length and a long side of 0.1 to 2 mm in length to obtain a molten alloy;
- and
- injecting and cooling the molten alloy on a cooler rotating at a peripheral speed of 20 to 50 m/s in an atmosphere at pressure 10 to 750 Torr higher than a peripheral atmosphere.
Dependencies are inferred from the claim text.