Magnetic recording medium, a method of manufacturing the same, and a magnetic storage using the magnetic recording medium
AssigneeFuji Electric Co., Ltd.
InventorsAkira Iso, Hiroyuki Uwazumi, Takahiro Shimizu, Naoki Takizawa, Miyabi Nakamura
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Abstract
A magnetic recording medium and method of manufacturing thereof facilitates to prevent a film inflation from occurring in an environmental condition range between −40° C. and 80° C. and an 80% relative humidity. The magnetic recording medium includes a plastic substrate and an undercoating layer on the plastic substrate. The undercoating layer is provided with a columnar structure, which prevents water (moisture) between the plastic substrate and the undercoating layer from aggregating and, therefore, the film inflation from occurring.
Claims28
A magnetic recording medium, comprising:
- a nonmagnetic substrate made of a polymer resin;
- a magnetic layer above the nonmagnetic substrate;
- a protection layer above the magnetic layer;
- and
- a liquid lubricant layer on the protection layer.
A method of manufacturing a magnetic recording medium comprising a nonmagnetic substrate made of a polymer resin, a magnetic layer above the nonmagnetic substrate, a protection layer above the magnetic layer, and a liquid lubricant layer on the protection layer, the method comprising:
- forming an undercoating layer on the nonmagnetic substrate under a pressure of 5 mTorr or higher.
A method of manufacturing a magnetic recording medium comprising a nonmagnetic substrate made of a polymer resin, a magnetic layer above the nonmagnetic substrate, a protection layer above the magnetic layer, and a liquid lubricant layer on the protection layer, the method comprising:
- forming an intermediate layer on the nonmagnetic substrate under a pressure of 5 mTorr or higher.
A magnetic storage, comprising:
- a magnetic recording medium mounted thereon, the magnetic recording medium comprising a nonmagnetic substrate made of a polymer resin, a magnetic layer above the nonmagnetic substrate, a protection layer above the magnetic layer, and a liquid lubricant layer on the protection layer.
Dependencies are inferred from the claim text.