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AssigneeFuji Electric Co., Ltd.
InventorsMiyabi Nakamura, Takahiro Shimizu, Hiroyuki Uwazumi, Naoki Takizawa, Tadaaki Oikawa
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A magnetic recording medium, and method of manufacturing the same, is provided with excellent recording performance by employing a granular magnetic layer having a specified composition. A magnetic recording medium according to the present invention comprises a nonmagnetic underlayer, a granular magnetic layer, a protective film, and a liquid lubrication layer sequentially laminated on a nonmagnetic substrate. The granular magnetic layer consists of ferromagnetic crystal grains containing cobalt and nonmagnetic grain boundary region surrounding the ferromagnetic crystal grains. The ferromagnetic crystal grains contain platinum in the range of 15 at % to 17 at %.
A magnetic recording medium comprising:
A method for manufacturing a magnetic recording medium, said method comprising steps of sequentially laminating at least a nonmagnetic under layer, a magnetic layer, a protective film, and a liquid lubrication layer on a nonmagnetic substrate, wherein said laminating steps are conducted without preheating said nonmagnetic substrate.
Dependencies are inferred from the claim text.