Magnetic recording medium
AssigneeHoya Corporation
InventorsNaoyuki Fukumoto, Hiroshi Hatano
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Abstract
A magnetic recording medium includes, in a main surface of a glass substrate on which a magnetic recording layer is formed, a plurality of annular first thermally-conductive regions having a larger thermal conductivity than the glass substrate that are provided concentrically with the glass substrate. The first thermally-conductive regions are each provided so that it extends across a plurality of tracks. The first thermally-conductive region has a radial width larger than a depth, from the main surface, of the first thermally-conductive region.
Claims6
A magnetic recording medium used for heat-assisted recording, comprising:
- a glass substrate having a shape of an annular disk;
- and
- a magnetic recording layer provided on at least one of two main surfaces of said glass substrate and including a plurality of annular tracks arranged in a radial direction, each of said plurality of annular tracks having a plurality of sectors into which each track of said plurality of annular tracks are divided in a circumferential direction to provide recording regions,
- a plurality of annular first thermally-conductive regions having a larger thermal conductivity than said glass substrate, provided concentrically with said glass substrate and arranged at said main surface of said glass substrate on which said magnetic recording layer is formed, each annular first thermally-conductive region of said plurality of annular first thermally-conductive regions being provided so that said first thermally-conductive region extends across a plurality of said annular tracks, and each annular first thermally-conductive region of said plurality of annular first thermally-conductive regions having a radial width larger than a depth, from said main surface, of said annular first thermally-conductive region.
Dependencies are inferred from the claim text.