Vertical magnetic recording medium

A magnetic recording medium and magnetic recording technology, applied in magnetic recording, magnetic recording layer, data recording, etc., can solve problems such as inability to establish, steep recording bits, etc.

Inactive Publication Date: 2005-10-26
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Steep recording bits cannot be established in the magnetic recording layer

Method used

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  • Vertical magnetic recording medium
  • Vertical magnetic recording medium
  • Vertical magnetic recording medium

Examples

Experimental program
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Effect test

Embodiment Construction

[0025] FIG. 1 schematically shows the internal structure of a hard disk drive (HDD) as an example of a magnetic recording medium drive or storage device. The HDD 11 includes a box-shaped main body case 12 defining, for example, an inner space of a flat parallelepiped. At least one magnetic recording disk 13 is placed in the inner space of the main body case 12 . The magnetic recording disk 13 belongs to a so-called perpendicular magnetic recording medium. The magnetic recording disk 13 is mounted on a drive shaft of a spindle motor 14 . The spindle motor 14 can drive the magnetic recording disk 13 to rotate at a relatively high rotational speed—for example, 7200 rpm, 10000 rpm, etc. A cover - not shown - cooperates with the main body case 12 to define an enclosed interior space between the main body case 12 and it.

[0026] The magnetic head actuator 16 is connected to the vertical support shaft 15 . The head actuator 16 includes rigid actuator arms 17 extending horizontal...

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Abstract

A nonmagnetic second orientation control layer spreading on the surface of a magnetic first orientation control layer is composed of crystal grains contiguous to each other. A recording magnetic layer spreading on the surface of the second orientation control layer is composed of crystal grains growing from individual crystal grains of the second orientation control layer. Crystal orientation of the recording magnetic layer is arranged sufficiently through action of the first and second orientation control layers. Crystal orientation can be controlled surely by the recording magnetic layer as compared with a case where only the nonmagnetic second orientation control layer having the same film thickness is employed. Furthermore, film thickness of the second orientation control layer can be reduced through action of the first orientation control layer. Sufficient orientation can be established in the recording magnetic layer regardless of a reduction in the film thickness of the second orientation control layer and high electromagnetic conversion characteristics can be attained.

Description

technical field [0001] The present invention relates to perpendicular magnetic recording media typically used in magnetic recording media drives, such as hard disk drives (HDD). Background technique [0002] Perpendicular magnetic recording media are well known. A perpendicular magnetic recording medium includes a so-called soft magnetic underlayer. The magnetic recording layer is laid on the soft magnetic underlayer. When the write head is directed to the magnetic recording layer, the magnetic recording layer is located between the write head and the soft magnetic underlayer. A circulation path of magnetic flux is established between the write head and the soft magnetic underlayer. This serves to increase the effect of the magnetic field on the recording magnetic layer. The magnetic field across the magnetic recording layer may have a steep gradient. Steep information bits can be created in the magnetic recording layer. [0003] The easy magnetization axis in the magn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/00G11B5/64G11B5/65G11B5/667G11B5/73
CPCG11B5/65G11B5/667B32B1/00G11B5/7325G11B5/737G11B5/674G11B5/676
Inventor 稻村良作竹下弘人杉本利夫下田一正大岛武典前田麻贵涡卷拓也田中厚志
Owner RESONAC HOLDINGS CORPORATION
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