Magnetic recording medium, method of manufacturing magnetic recording medium, and magnetic recording device
AssigneeFujitsu Limited
InventorsRyosaku Inamura, Isatake Kaitsu
Life of this patent
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Abstract
An under layer, a FeCoB seed layer, a crystalline orientation control layer having an fcc structure, a non-magnetic underlying layer, a first recording layer, a second recording layer, and a protective layer are formed on a substrate. The under layer includes three layers: a first soft magnetic layer, a non-magnetic spacer layer, and a second soft magnetic layer. The first recording layer has a granular structure in which magnetic particles are dispersed in a non-magnetic material, and the second recording layer has a non-granular structure.
Claims20
A magnetic recording medium comprising:
- a substrate;
- an under layer formed on the substrate and made of a soft magnetic material;
- a seed layer formed on the under layer and made of FeCoB;
- a crystalline orientation control layer which is formed on the seed layer, and which has a face-centered cubic lattice (fcc) structure;
- an underlying layer formed on the crystalline orientation control layer and made of a non-magnetic material;
- and
- a recording layer which is formed on the underlying layer, and which magnetically records data.
A method of manufacturing a magnetic recording medium, comprising the steps of:
- forming an under layer made of a soft magnetic material on a substrate;
- forming a seed layer made of FeCoB on the under layer;
- forming a crystalline orientation control layer having a face-centered cubic lattice (fcc) structure on the seed layer;
- forming an underlying layer made of a non-magnetic material on the crystalline orientation control layer;
- and
- forming a recording layer on the underlying layer.
A magnetic recording device comprising:
- a magnetic head;
- and
- a magnetic recording medium which the magnetic head can write data to and read data from,
- wherein the magnetic recording medium comprising:
- a substrate;
- an under layer formed on the substrate and made of a soft magnetic material;
- a seed layer formed on the under layer and made of FeCoB;
- a crystalline orientation control layer which is formed on the seed layer, and which has a face-centered cubic lattice (fcc) structure;
- an underlying layer formed on the crystalline orientation control layer and made of a non-magnetic material;
- and
- a recording layer which is formed on the underlying layer, and which magnetically records data.
Dependencies are inferred from the claim text.