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A recording layer is formed on a substrate, and a high thermal conductor having a thermal conductivity higher than that of the recording layer is disposed inside a plurality of recording bit regions constituting the recording layer, respectively. Furthermore, the recording layer is formed with a separating portion which divides the recording layer into the plurality of recording bit regions. The separating layer is filled with a low thermal conductor having a thermal conductivity lower than that of the recording layer.

Titel:	MAGNETIC RECORDING MEDIUM
Autor/in / Beteiligte Person:	Tanaka, Yoshikazu ; Chiba, Norio ; Oumi, Manabu ; Hirata, Masakazu ; Shinohara, Yoko ; Tanabe, Sachiko
Link:	Zum Volltext
Veröffentlichung:	2012
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20120237797 Publication Date: September 20, 2012 Appl. No: 13/421929 Application Filed: March 16, 2012 Claim: 1. A magnetic recording medium with a recording layer formed on a substrate, wherein a high thermal conductor having a thermal conductivity higher than that of the recording layer is disposed inside a plurality of recording bit regions constituting the recording layer, respectively. Claim: 2. The magnetic recording medium according to claim 1, wherein the high thermal conductor is disposed so as to penetrate the recording layer. Claim: 3. The magnetic recording medium according to claim 2, wherein a ground layer is formed between the substrate and the recording layer, and the high thermal conductor is disposed so as to penetrate the recording layer and the ground layer. Claim: 4. The magnetic recording medium according to claim 1, wherein the high thermal conductor penetrates the recording layer, and a cross-sectional area of a direction perpendicular to a stacking direction with respect to the high thermal conductor is increased, as the area faces the substrate in the stacking direction. Claim: 5. The magnetic recording medium according to claim 1, wherein a recording layer constituting the same recording bit region as the recording layer surrounding the high thermal conductor is disposed inside the high thermal conductor. Claim: 6. The magnetic recording medium according to claim 1, wherein an outer peripheral surface of the high thermal conductor is formed with a plurality of concave portions depressed inward along the outer peripheral surface. Claim: 7. The magnetic recording medium according to claim 1, wherein the recording layer is formed with a separating portion which divides the recording layer into a plurality of partitions, and the separating portion is filled with a low thermal conductor having a thermal conductivity lower than that of the recording layer. Claim: 8. The magnetic recording medium according to claim 1, wherein the recording bit region and the high thermal conductor are concentrically placed. Claim: 9. The magnetic recording medium according to claim 1, wherein the high thermal conductor is formed of a metallic material or a dielectric material. Claim: 10. The magnetic recording medium according to claim 3, wherein an orientation layer for orienting a magnetization direction of magnetic particles constituting the recording bit region in a certain direction with respect to a substrate surface of the substrate is formed between the substrate and the recording layer, and the high thermal conductor is disposed so as to further penetrate the orientation layer. Claim: 11. The magnetic recording medium according to claim 10, wherein the orientation layer is formed further to the recording layer side than the ground layer. Current U.S. Class: 428/846 Current International Class: 11

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MAGNETIC RECORDING MEDIUM