Magnetic recording medium and method for manufacture thereof
First Claim
1. A magnetic recording medium comprising:
- a non-magnetic substrate;
a soft magnetic layer formed on the non-magnetic substrate, the soft magnetic layer including a plurality of projected parts arranged regularly on a surface thereof and recessed parts surrounding each of the projected parts;
a ferromagnetic layer formed on the soft magnetic layer, the ferromagnetic layer including projected parts and recessed parts reflecting the projected parts and the recessed parts of the soft magnetic layer; and
recording areas having perpendicular magnetic anisotropy and ferromagnetism, the recording areas being formed of the projected parts of the ferromagnetic layer and being separated magnetically from their surroundings.
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Accused Products
Abstract
A magnetic recording medium includes a non-magnetic substrate; a soft magnetic layer which is formed on the non-magnetic substrate and which includes projected parts arranged on the surface thereof and recessed parts surrounding each of the projected part; and a ferromagnetic layer which is formed on the soft magnetic layer and which includes projected parts and recessed parts reflecting the projected parts and the recessed parts of the soft magnetic layer. Further the magnetic recording medium includes recording areas which have perpendicular magnetic anisotropy and ferromagnetism, and which are formed of the projected parts of the ferromagnetic layer and separated magnetically from their surroundings. A method for manufacture of the magnetic recording medium includes forming a soft magnetic layer including of projected parts arranged regularly on the surface thereof and recessed parts surrounding each projected part; and forming a ferromagnetic layer having perpendicular magnetic anisotropy on the soft magnetic layer.
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Citations
21 Claims
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1. A magnetic recording medium comprising:
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a non-magnetic substrate;
a soft magnetic layer formed on the non-magnetic substrate, the soft magnetic layer including a plurality of projected parts arranged regularly on a surface thereof and recessed parts surrounding each of the projected parts;
a ferromagnetic layer formed on the soft magnetic layer, the ferromagnetic layer including projected parts and recessed parts reflecting the projected parts and the recessed parts of the soft magnetic layer; and
recording areas having perpendicular magnetic anisotropy and ferromagnetism, the recording areas being formed of the projected parts of the ferromagnetic layer and being separated magnetically from their surroundings. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A magnetic recording medium comprising:
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a non-magnetic substrate including a plurality of projected parts arranged regularly on a surface thereof and recessed parts surrounding each projected part;
a magnetic layer formed on the non-magnetic substrate, the magnetic layer including a plurality of projected parts and recessed parts reflecting the projected parts and the recessed parts of the non-magnetic substrate;
recording areas having perpendicular magnetic anisotropy and ferromagnetism, the recording areas being formed of the projected parts of the magnetic layer, and being separated magnetically from their surroundings; and
non-recording areas having soft magnetism, the non-recording areas being formed of the magnetic layer excepting the recording areas. - View Dependent Claims (10)
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11. A method for manufacture of a magnetic recording medium comprising:
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forming a soft magnetic layer including a plurality of projected parts arranged regularly on a surface thereof and recessed parts surrounding each of the projected parts; and
forming a ferromagnetic layer having perpendicular magnetic anisotropy on the soft magnetic layer. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method for manufacture of a magnetic recording medium comprising:
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forming a non-magnetic substrate including a plurality of projected parts arranged regularly on a surface thereof and recessed parts surrounding each projected part; and
forming an artificial lattice layer made of a ferromagnetic material having perpendicular magnetic anisotropy on the non-magnetic substrate. - View Dependent Claims (20, 21)
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Specification