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Magnetic recording medium, magnetic recording/reproducing device and method for manufacturing magnetic recording medium

A magnetic recording medium and magnetic recording technology, applied in the direction of magnetic recording, configuration/installation of recording head, data recording, etc., can solve the problem of magnetic recording medium rotation, etc., and achieve the effects of preventing contact, high production efficiency, and excellent stability

Inactive Publication Date: 2011-04-13
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, when the surface of the magnetic head facing the magnetic recording medium and the surface of the magnetic recording medium are sufficiently smooth, the two are firmly attracted, and there are cases where the magnetic recording medium cannot be rotated even if the hard disk drive is restarted.

Method used

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  • Magnetic recording medium, magnetic recording/reproducing device and method for manufacturing magnetic recording medium
  • Magnetic recording medium, magnetic recording/reproducing device and method for manufacturing magnetic recording medium
  • Magnetic recording medium, magnetic recording/reproducing device and method for manufacturing magnetic recording medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11、 comparative example 1～9

[0154] First, set a disk-shaped glass substrate for hard disk (HD) in the vacuum chamber, and the vacuum exhaust is 1.0×10 -5 Below Pa. As the glass substrate, the Li 2 Si 2 o 5 、Al 2 o 3 -K 2 O, Al 2 o 3 -K 2 O, MgO-P 2 o 5 , Sb 2 o 3 - A substrate having an outer diameter of 65 mm, an inner diameter of 20 mm, and an average surface roughness (Ra) of 2 angstroms, made of crystallized glass composed of ZnO.

[0155] A magnetic layer was formed on the glass substrate by DC sputtering. The magnetic layer was sequentially laminated with a backing layer made of a soft magnetic film of 60Fe30Co10B, an intermediate layer made of Ru, and a layer made of 70Co-5Cr-15Pt-10SiO. 2 The magnetic film of the grain structure formed by the alloy is obtained. Next, a thin film of a carbon mask layer was laminated on the magnetic layer by P-CVD method.

[0156] The film thickness of each layer was 60 nm for the back layer, 10 nm for the intermediate layer, 15 nm for the magnetic f...

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Abstract

Provided is a magnetic recording medium which can be manufactured at high manufacturing efficiency, has protruding sections which are composed of a magnetic layer and can be separated by a recessed separating region, and provides excellent stable floating characteristics of a magnetic head. In a magnetic recording medium (40), at least on one surface of a disc-like substrate, an annular magnetic recording region (A), and a landing region (B) arranged along an edge section of the magnetic recording region (A) are arranged. The magnetic recording region (A) is provided with a data region (41) having a data pattern (45) composed of protruding sections (43a) composed of a magnetic layer, and a recessed separating regions (44a) formed at the periphery of the protruding sections (43a); and a servo information region (42) provided with a servo pattern (46), which is composed of protruding sections (43b, 43c) and an isolating region (44b) and has a shape different from that of the data pattern (45) in plane view. At least on a part of the landing region (B), an uneven pattern (47) having a protruding section (43d) which has the same shape as that of the protruding section (43a) of the data pattern (45) is arranged.

Description

technical field [0001] The present invention relates to a magnetic recording medium and a magnetic recording / reproducing device used in a hard disk device or the like. [0002] This application claims priority based on Japanese Patent Application Laid-Open No. 2008-119769 for which it applied in Japan on May 1, 2008, and uses the content here. Background technique [0003] Recently, the application range of magnetic recording devices such as magnetic disk devices, floppy disk devices, and magnetic tape devices has been significantly expanded, and their importance has increased. At the same time, the recording (storage) density of magnetic recording media used in these devices has been significantly increased. In particular, since the introduction of MR (magnetoresistive) head and PRML technology, the increase in areal recording density has been more drastic. In recent years, GMR heads, TMR heads, etc. have also been introduced, and the increase in areal recording density has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/65G11B5/82G11B5/851
CPCG11B5/82G11B5/855B82Y10/00G11B5/743G11B5/54
Inventor 福島正人
Owner SHOWA DENKO KK
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