Thermally assisted magnetic recording medium
AssigneeFujitsu Limited
InventorsTakuya Kamimura, Koji Matsumoto, Yuzuru Yamakage, Koichi Iida
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Abstract
A thermally assisted magnetic recording medium includes a substrate having a first surface and a second surface opposite to the first surface. A recording layer is formed on the first surface of the substrate. A plurality of thermally conductive regions are provided at the first surface of the substrate to extend in parallel to each other and about the center of rotation of the recording medium. The thermally conductive regions have a higher thermal conductivity than the substrate, and are at least partially embedded in the substrate.
Claims15
A thermally assisted magnetic recording medium to be rotated in recording information, comprising:
- a substrate including a first surface and a second surface opposite to the first surface;
- a recording layer formed on the first surface of the substrate, the recording layer including a plurality of recording tracks extending in parallel about a center of rotation of the recording medium;
- and
- a plurality of thermally conductive regions provided at the first surface of the substrate and extending in parallel about the enter of rotation of the recording medium, the plurality of thermally conductive regions being arranged alternately with the plurality of recording tracks, respectively;
- wherein the thermally conductive regions have a higher thermal conductivity than the substrate, each of the regions being at least partially embedded in the substrate.
A thermally assisted magnetic recording medium to be rotated in recording information, comprising:
- substrate including a first surface and a second surface opposite to the first surface;
- a recording layer formed on the first surface of the substrate;
- and
- a plurality of thermally conductive regions provided at the first surface of the substrate and extending in parallel about a center of the rotation of the recording medium;
- wherein the thermally conductive regions have a higher thermal conductivity than the substrate, each of the regions being at least partially embedded in the substrate;
- and
- wherein each of the thermally conductive regions penetrates through the recording layer.
A thermally assisted magnetic recording medium to be rotated in recording information, comprising:
- a substrate including a first surface and a second surface opposite to the first surface;
- a recording layer formed on the first surface of the substrate;
- and
- a plurality of thermally conductive regions provided at the first surface of the substrate and extending in parallel about a center of the rotation of the recording medium;
- wherein the thermally conductive regions have a higher thermal conductivity than the substrate, each of the regions being at least partially embedded in the substrate;
- and
- wherein the thermally conductive regions have a higher thermal conductivity the closer the same are located to the center of the rotation.
A thermally assisted magnetic recording medium to be rotated in recording information, comprising:
- a substrate including a first surface and a second surface opposite to the first surface;
- a recording layer formed on the first surface of the substrate;
- and
- a plurality of thermally conductive regions provided at the first surface of the substrate and extending in parallel about a center of the rotation of the recording medium;
- wherein the thermally conductive regions have a higher thermal conductivity than the substrate, each of the regions being at least partially embedded in the substrate;
- and
- wherein the thermally conductive regions have a greater cross-sectional area the closer the same are located to the center of the rotation.
A thermally assisted magnetic recording medium to be rotated in recording information, comprising:
- a substrate including a first surface and a second surface opposite to the first surface;
- a recording layer formed on the first surface of the substrate;
- and
- a plurality of thermally conductive regions provided at the first surface of the substrate and extending in parallel about a center of the rotation of the recording medium;
- wherein the thermally conductive regions have a higher thermal conductivity than the substrate, each of the regions being at least partially embedded in the substrate;
- and
- wherein the plurality of thermally conductive regions are divided into groups, each group including adjacent ones of the thermally conductive regions, and wherein a thermally conductive region belonging to a group relatively closer to the center of the rotation has a higher thermal conductivity than another thermally conductive region belonging to a group located relatively more distantly from the center of the rotation.
A thermally assisted magnetic recording medium to be rotated in recording information, comprising:
- a substrate including a first surface and a second surface opposite to the first surface;
- a recording layer formed on the first surface of the substrate;
- and
- a plurality of thermally conductive regions provided at the first surface of the substrate and extending in parallel about a center of the rotation of the recording medium;
- wherein the thermally conductive regions have a higher thermal conductivity than the substrate, each of the regions being at least partially embedded in the substrate;
- and
- wherein the plurality of thermally conductive regions are divided into groups, each group including adjacent ones of the thermally conductive regions, and wherein a first thermally conductive region belonging to a group located relatively closer to the center of the rotation has a greater cross-sectional area than a second thermally conductive region belonging to a group located relatively more distantly from the center of the rotation.
Dependencies are inferred from the claim text.