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US 8,475,948 B2Granted
Magnetic recording medium for thermally assisted recording
AssigneeFuji Electric Co., Ltd.
InventorsAkira Furuta, Tsuyoshi Yoshizawa
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Abstract
A magnetic recording medium suppresses an anticipated decline in performance due to heating of the lubricant layer and protective layer in thermally assisted recording, and has superior durability and reliability. The magnetic recording medium comprises a layer stack comprising, in order on a nonmagnetic substrate, at least a magnetic recording layer, adiabatic layer, carbon-based protective layer, and lubricant layer.
Claims11
A magnetic recording medium for use in a thermally assisted recording apparatus, comprising:
- a nonmagnetic substrate having a flat surface;
- and
- a layer stack including at least a magnetic recording layer for magnetically storing bits, an adiabatic layer on the magnetic recording layer, a carbon-based protective layer on the adiabatic layer to provide protection from contact with a magnetic read/write head, and a lubricant layer on the carbon-based protective layer, the layer stack being disposed above the flat surface of the nonmagnetic substrate,
- wherein the adiabatic layer inhibits transfer of heat developed in the magnetic recording layer during thermally assisted recording to the carbon-based protective layer and the lubricant layer, and
- wherein the adiabatic layer includes a film that comprises ZrO2, the film being a continuous film that extends parallel to the flat surface of the substrate.
2 more elements
A magnetic recording medium for use in a thermally assisted recording apparatus, comprising:
- a nonmagnetic substrate having a flat surface;
- and
- a layer stack including at least a magnetic recording layer for magnetically storing bits, an adiabatic layer on the magnetic recording layer, a carbon-based protective layer on the adiabatic layer to provide protection from contact with a magnetic read/write head, and a lubricant layer on the carbon-based protective layer, the layer stack being disposed above the flat surface of the nonmagnetic substrate,
- wherein the adiabatic layer inhibits transfer of heat developed in the magnetic recording layer during thermally assisted recording to the carbon-based protective layer and the lubricant layer, and
- wherein the adiabatic layer includes a (SiO2)6.(Al2O3) 94 complex compound film, the film being a continuous film that extends parallel to the flat surface of the substrate.
2 more elements
Dependencies are inferred from the claim text.