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OwnerHiroaki Ueda, Masahiro Morikawa +1inventors
InventorsHiroaki Ueda, Masahiro Morikawa, Hideki Kawai
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Provided is a magnetic recording medium substrate suitable for preparation of a DT medium and a patterned medium, and the magnetic recording medium substrate is possible to be of easy preparation of the DT medium and the patterned medium with no complicated processes. Disclosed is a magnetic recording medium substrate comprising a circular plate-shaped substrate made of a nonmagnetic base material, wherein a predetermined region of a surface of the substrate to form a magnetic film on the surface is more roughened than another region of the surface. When forming a magnetic film on this substrate, the magnetic film is formed in the region of the substrate surface, which is more roughened than the other region, to easily prepare the DT medium and the patterned medium.
1-22. (canceled)
A magnetic recording medium substrate comprising a circular plate-shaped substrate made of a nonmagnetic base material,
The magnetic recording medium substrate of claim 1,
A magnetic recording medium substrate comprising a circular plate-shaped substrate made of a nonmagnetic base material,
A magnetic recording medium substrate comprising a circular plate-shaped substrate made of a nonmagnetic base material,
A magnetic recording medium substrate comprising a circular plate-shaped substrate made of a nonmagnetic base material,
The magnetic recording medium substrate of claim 1,
The magnetic recording medium substrate of claim 1,
A magnetic recording medium comprising a magnetic film formed on a surface of the magnetic recording medium substrate of claim 1.
A method of manufacturing a magnetic recording medium, comprising the step of:
Dependencies are inferred from the claim text.