Vertical magnetic recording medium, vertical magnetic recording medium manufacturing method, and magnetic recording/reproduction device

A technology of perpendicular magnetic recording and manufacturing method, which is applied in magnetic recording, data recording, disc carrier manufacturing, etc., and can solve problems such as insufficient impact resistance of the protective film

Inactive Publication Date: 2011-05-04
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, even when a protective film is formed on the surface of the magnetic disk, if the impact resistance of the protective film is insufficient, the protective film cannot withstand the impact of the magnetic head on the magnetic disk surface, and there is a possibility of surface scratches.

Method used

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  • Vertical magnetic recording medium, vertical magnetic recording medium manufacturing method, and magnetic recording/reproduction device
  • Vertical magnetic recording medium, vertical magnetic recording medium manufacturing method, and magnetic recording/reproduction device
  • Vertical magnetic recording medium, vertical magnetic recording medium manufacturing method, and magnetic recording/reproduction device

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Experimental program
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Embodiment

[0140] The perpendicular magnetic recording medium A shown in FIG. 1(I) was produced by the production method shown below.

[0141] First, as the non-magnetic substrate 1, prepare a cleaned disc-shaped glass substrate for HD (manufactured by Ohara Co., Ltd., 0.85 inches in outer diameter), and set it in a vacuum exhausted to 1.0×10. -5 Vacuum chamber below pa. Then, on the nonmagnetic substrate 1, 65Fe-25Co-10B (atomic %) 50nm, Ru 0.8nm, and 65Fe-25Co-10B (atomic %) 50nm were sequentially formed without heating, thereby forming a soft magnetic backing layer 2. Next, an orientation control layer 3 made of Ru and having a thickness of 20 nm was formed on the soft magnetic backing layer 2 . By forming the 65Co-10Cr-15Pc-10SiO on the above-mentioned orientation control layer 3 2 (atomic %) magnetic layer 4 with a thickness of 12 nm forms the recording layer 6 . The magnetic layer 4 has magnetic material particles containing Co, Cr and Pt dispersed in SiO 2 granular structure ...

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Abstract

A vertical magnetic recording medium. A non-magnetic substrate has a recording layer formed on the substrate and having a magnetic anisotropy in a direction vertical to the substrate. The recording layer is a vertical magnetic recording medium having a plurality of recording units and a plurality of separation regions separating the adjacent recording units. The separation regions are formed from a material having a granular structure.

Description

technical field [0001] The present invention relates to a perpendicular magnetic recording medium used in a hard disk device and the like, a method for manufacturing the perpendicular magnetic recording medium, and a magnetic recording and reproducing device having the perpendicular magnetic recording medium. [0002] This application claims priority based on Patent Application No. 2008-88146 for which it applied in Japan on March 28, 2008, and uses the content of the said application in this application. Background technique [0003] In recent years, the scope of application of magnetic recording devices such as magnetic disk devices, floppy (registered trademark) disk devices, and magnetic tape devices has significantly increased, and their importance has also increased. Along with this, the recording density of magnetic recording media used in these devices is being remarkably increased. Especially since the introduction of MR head (magnetoresistive head) and PRML (Parti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/65G11B5/84
CPCG11B5/855
Inventor 福岛正人
Owner RESONAC HOLDINGS CORPORATION
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