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US 2010/0304186 A1Published application
Magnetic disk and method of manufacturing the same
AssigneeHoya Corporation
InventorKoichi Shimokawa
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AssigneeHoya Corporation
InventorKoichi Shimokawa
Estimating the term…
Provided is a magnetic disk comprising a lubricating layer formed of a lubricant. The lubricant constituting the lubricating layer has excellent properties, for example, excellent fluidity, surface energy, and CFT properties. By virtue of the excellent properties, the magnetic disk has a high level of reliability despite a low flying height of a magnetic head due to a recent rapid increase in recording density and a very severe environment resistance requirement due to diversification of applications. The magnetic disk comprises a substrate and at least a magnetic layer, a protective layer, and a lubricating layer provided in that order over the substrate. The lubricating layer is formed of a lubricant that is a mixture of a specific perfluoropolyether lubricant with a lubricant formed of a compound comprising perfluoropolyether groups having a perfluoropolyether main chain in the structure thereof and having a hydroxyl group at the end thereof, the perfluoropolyether groups being bonded to each other through a divalent linking group having at least two hydroxyl groups in the structure thereof.
A magnetic disk having at least a magnetic layer, a protective layer, and a lubricating layer provided in this order over a substrate,
A method of manufacturing a magnetic disk, the method forming at least a magnetic layer, a protective layer, and a lubricating layer in this order over a substrate, wherein the method comprises
Dependencies are inferred from the claim text.