Magnetic recording media and hard disk drive apparatus having the same
AssigneeSamsung Electronics Co., Ltd.
InventorsChang-Hwan LEE, Sang Hyub LEE
Life of this patent
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Abstract
A perpendicular magnetic recording medium includes a substrate forming a base, a magnetic layer deposited on a surface of the substrate in a direction along a thickness of the substrate, and an overcoat deposited on the magnetic layer in the direction along the thickness of the substrate to protect the magnetic layer, and having a texture formed partially indented from a surface and textured to have a predetermined surface roughness. The hard disk drive apparatus includes a magnetic head and the perpendicular magnetic recording medium where data is recorded and stored using the magnetic head.
Claims22
A perpendicular magnetic recording medium, comprising:
- a substrate forming a base;
- a magnetic layer deposited on a surface of the substrate in a direction along a thickness of the substrate;
- and
- an overcoat deposited on the magnetic layer in the direction along the thickness of the substrate, to protect the magnetic layer, and having a texture formed partially indented from a surface and textured to have a predetermined surface roughness.
A hard disk drive apparatus, comprising:
- a magnetic head;
- and
- a perpendicular magnetic recording medium where data is recorded and stored using the magnetic head, the perpendicular magnetic recording medium comprises:
- a substrate forming a base;
- a magnetic layer deposited on a surface of the substrate in a direction along a thickness of the substrate;
- and
- an overcoat deposited on the magnetic layer in the direction along the thickness of the substrate, protecting the magnetic layer, and having a texture formed partially indented from a surface and textured to have a predetermined surface roughness.
A perpendicular magnetic recording medium, comprising:
- a substrate layer having a substantially smooth upper surface;
- an overcoat layer having a textured upper surface with a predetermined roughness;
- and
- a magnetic layer interposed between the substrate layer and the overcoat layer;
- wherein the substantially smooth upper surface of the substrate layer faces the magnetic layer and the textured upper surface of the overcoat layer does not face the magnetic layer.
A method of forming a perpendicular magnetic recording medium, the method comprising:
- forming a substrate layer having a substantially smooth upper surface;
- forming an overcoat layer having a textured upper surface with a predetermined roughness;
- and
- forming a magnetic layer interposed between the substrate layer and the overcoat layer so that the magnetic layer faces the substantially smooth upper surface of the substrate layer and the magnetic layer does not face the textured upper surface of the overcoat layer.
A hard disk drive apparatus, comprising:
- a magnetic head;
- and
- a perpendicular magnetic recording medium, comprising:
- a substrate layer having a substantially smooth upper surface;
- an overcoat layer having a textured upper surface with a predetermined roughness;
- and
- a magnetic layer interposed between the substrate layer and the overcoat layer;
- wherein the substantially smooth upper surface of the substrate layer faces the magnetic layer and the textured upper surface of the overcoat layer does not face the magnetic layer.
A perpendicular magnetic recording medium, comprising:
- a substrate layer having a substantially smooth upper surface;
- an overcoat layer having a textured upper surface with a predetermined roughness;
- an interlayer disposed between the overcoat layer and the substrate layer;
- a magnetic layer disposed between the interlayer and the overcoat layer;
- and
- a soft underlayer disposed between the interlayer and the substrate layer.
Dependencies are inferred from the claim text.