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AssigneeHitachi Maxell, Ltd.
InventorsMitsutoshi Honda, Hiroki Yamamoto, Takashi Naito, Tatsumi Hirano, Tetsuo Nakazawa, Fumiyoshi Kirino, Teruaki Takeuchi, Akira Yano, Nobuyuki Inaba, Satoshi Matsunuma
Estimating the term…
An amorphous magnetic recording medium comprising a substrate and an amorphous magnetic layer, where a magnetic domain formation-controlling layer comprising a main phase and 1 to 3 kinds of discrete spherical isolating phases arranged horizontally in lines in the main phase or 1 to 3 kinds of discrete spherical phases vertically stacked one upon another in the main phase is formed on the top side or the bottom side directly or through at least one of other layers to bring the amorphous magnetic layer into a finer magnetic domain structure, can satisfy high density recording.
An amorphous magnetic recording medium, which comprises a substrate and a magnetic layer formed on the substrate directly or through at least one other layer, where a magnetic domain formation-controlling layer is provided on the top side or the bottom side of the magnetic layer directly or through at least one other layer, the magnetic domain formation-controlling layer comprising a main phase and 1 to 3 kinds of discrete spherical isolating phases arranged horizontally in lines in the main phase or 1 to 3 kinds of discrete spherical isolated phases vertically stacked one upon another in the main phase, and the magnetic layer is amorphous.
An amorphous magnetic recording medium, which comprises a substrate and a magnetic layer formed on the substrate or through at least one of other layers, where a magnetic domain formation-controlling layer is formed on the bottom side of the magnetic layer directly or through at least one of other layers comprising 30 to 95% by weight of cobalt oxide, 30 to 2% by weight of silicon-nitride and 40 to 3% by weight of titanium oxide, sum total being 100% by weight, and the magnetic layer is amorphous.
A process for producing an amorphous magnetic recording medium, which comprises a step of forming a magnetic domain formation-controlling layer on a substrate and a step of forming a magnetic layer, where the former step includes a step of forming a main phase and 1 to 3 kinds of discrete spherical isolating phases arranged horizontally in lines in the main phase or 1 to 3 kinds of discrete spherical isolating phases vertically stacked one upon another in the main phase and the latter step includes a step of forming an amorphous magnetic layer as the magnetic layer.
A magnetic recording and reproduction apparatus, which comprises a magnetic recording apparatus, a spindle for supporting the medium a spindle motor for rotating the spindle, a magnetic head for reading and writing information, a voice controller motor, VCM, for driving the magnetic head and a circuit for controlling said members, the magnetic recording medium comprising a substrate and a magnetic layer formed on the substrate directly or through at least one of other layers, where a magnetic domain formation-controlling layer is formed on the top side or the bottom side of the magnetic layer directly or through at least one of other layers, the magnetic domain formation-controlling layer comprising a main phase and 1 to 3 kinds of discrete spherical isolating phases provided in the main phase or 1 to 3 kinds of discrete spherical isolating phases vertically stacked one upon another in the main phase, and the magnetic layer is amorphous.
A magnetic recording and reproduction apparatus, which comprises a magnetic recording medium, a spindle for supporting the medium, a spindle motor for rotating the spindle, a magnetic head for reading and writing information, VCM, for driving the magnetic
Dependencies are inferred from the claim text.