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US 8,475,949 B2Granted
Method for manufacturing magnetic recording medium and magnetic recording medium
AssigneeKabusihki Kaisha Toshiba
InventorsKaori Kimura, Yoshiyuki Kamata, Satoshi Shirotori, Masatoshi Sakurai
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Abstract
A magnetic recording medium is presented that includes protruded magnetic patterns formed on a substrate, and a nonmagnetic material filled in recesses between the magnetic patterns in which an oxygen concentration thereof is higher at a surface side than at a substrate side. The nonmagnetic material is at least one selected from the group consisting of Si, SiC, SiC—C, SiOC, SiON, Si3N4, Al, AlxOy, Ti and TiOx.
Claims2
A magnetic recording medium comprising:
- protruded magnetic patterns formed on a substrate;
- and
- a nonmagnetic material filled in recesses between the magnetic patterns,
- wherein the nonmagnetic material consists of oxygen and a material selected from the group consisting of Si, SiC, SiC—C, SiOC, SiON, Si3N4, Al, AlxOy, Ti, and TiOx, and an oxygen concentration of the nonmagnetic material is higher at a surface side than at a substrate side.
1 more element
Dependencies are inferred from the claim text.