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Magnetic recording medium, method for production thereof and magnetic recording and reproducing device using the medium

A technology of magnetic recording medium and perpendicular magnetic recording, which can be used in magnetic recording, magnetic recording layer, data recording, etc., and can solve problems such as granular structure corrosion.

Inactive Publication Date: 2007-06-13
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The perpendicular magnetic recording film uses a granular structure containing oxides, which is prone to corrosion due to errors

Method used

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  • Magnetic recording medium, method for production thereof and magnetic recording and reproducing device using the medium

Examples

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example 1

[0067] The cleaned silicon substrate (20 mm in diameter) was placed in a film-forming chamber of a DC magnetron sputtering apparatus (manufactured by Anelva Co., sold under code C-3010). The inside of the film-forming chamber is evacuated until the vacuum degree reaches 1×10 -5 Pa. Then, 50nm of 89Co-4Zr-7Nb (Co content 89at%, Zr content 4at%, Nb content 7at%), 0.8nm Ru and 50nm 89Co-4Zr-7Nb were formed on this silicon substrate and processed to form a soft magnetic film. Subsequently, 20nm of Ru was deposited to form an orientation control film, 12nm of 66Co-8Cr-18Pt-8SiO 2 to form a perpendicular magnetic recording film. At this time, the substrate was not heated.

[0068] Next, a 4nm protective film (DLC) was formed by CVD.

[0069] Then, a layer of perfluoropolyether lubricating film is formed by dipping method, thereby completing the manufacture of the magnetic recording medium.

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Abstract

A magnetic recording medium includes at least a soft under layer, a perpendicular magnetic recording film and a protective film that are stacked on a nonmagnetic substrate. The nonmagnetic substrate is a disk of silicon having a diameter of 48 mm or less. A method for the production of the magnetic recording medium includes exerting a bias onto the silicon substrate when forming the protective film. A magnetic recording medium can be produced using the method. A magnetic recording and reproducing device can be produced using the magnetic recording medium and a magnetic head for recording and reproducing information in the magnetic recording medium. The magnetic head is a magnetic monopole head.

Description

[0001] References to related patent applications: [0002] This application is an application filed pursuant to 35 U.S.C § 111(a), claiming Provisional Application No. 60 / 578,849 filed June 14, 2004, pursuant to 35 U.S.C § 119(e)(1) and pursuant to 35 U.S.C § 111(b) rights on the filing date of Japanese Patent Application No. 2004-168640, filed June 7, 2004. technical field [0003] The present invention relates to a magnetic recording medium, a method of manufacturing the same, and a magnetic recording and reproducing apparatus using the magnetic recording medium. Background technique [0004] The perpendicular magnetic recording system is suitable for increasing the surface recording density because, by turning the easy magnetization axis of the magnetic recording layer from the hitherto in-plane direction of the medium to the perpendicular direction of the medium, it is possible to reduce the distance between recording bits as The demagnetization field of the adjacent po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/73G11B5/64G11B5/65G11B5/667G11B5/72G11B5/84
CPCG11B5/65G11B5/667G11B5/8404G11B5/658
Inventor 清水谦治
Owner SHOWA DENKO KK
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