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Method for inspection of magnetic recording medium, magnetic recording medium, and magnetic recording/reproducing device

A technology of magnetic recording medium and inspection method, which is applied in the field of magnetic recording medium inspection, magnetic recording medium and magnetic recording and reproducing device, and can solve the problems of unstable magnetic recording and reproducing characteristics, inability to remove extremely small amounts of pollutants, etc., and achieve magnetic recording Stable regeneration characteristics, less pollution, and excellent environmental resistance

Inactive Publication Date: 2012-02-15
RESONAC HOLDINGS CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, contaminants may contaminate the surface of the magnetic recording medium from the exposed portion.
[0012] However, in the above-mentioned methods in the past, with the improvement of the recording density of the magnetic recording and reproducing device, the extremely small amount of pollutants that become significant due to the further reduction of the floating amount of the magnetic head cannot be completely removed from the magnetic recording medium.
Therefore, the contaminants are attached (transferred) to the magnetic head, and the magnetic recording and reproducing characteristics of the magnetic recording and reproducing device may become unstable.

Method used

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  • Method for inspection of magnetic recording medium, magnetic recording medium, and magnetic recording/reproducing device
  • Method for inspection of magnetic recording medium, magnetic recording medium, and magnetic recording/reproducing device
  • Method for inspection of magnetic recording medium, magnetic recording medium, and magnetic recording/reproducing device

Examples

Experimental program
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Effect test

Embodiment 1～6、 comparative example 1～4

[0085] As a non-magnetic substrate, a crystallized glass substrate (manufactured by Ohara Corporation) having an outer diameter of 65 mm, an inner diameter of 20 mm, and a thickness of 0.635 mm was prepared. Next, a texture (texture) is applied to this non-magnetic substrate, and it is fully washed and dried. Next, after placing the above-mentioned textured non-magnetic substrate in the chamber of a DC magnetron sputtering device (manufactured by ANELBA (Japan), C3040), exhaust until the ultimate vacuum degree in the above-mentioned chamber is 2×10 -7 Holder (2.7×10 -5 Pa).

[0086] Using a DC sputtering method, a FeCoB film was sequentially formed as a soft magnetic layer, a Ru film was formed as an intermediate layer, and a 25Fe-30Co-45Pt film was formed as a magnetic layer on a non-magnetic substrate. The film thicknesses of the respective layers obtained by film formation were 60 nm for the soft magnetic layer, 10 nm for the intermediate layer, and 15 nm for the magnetic...

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Abstract

Disclosed is a method for inspecting a magnetic recording medium, in which the adhesion (transfer) of contaminants or corrosive materials to a magnetic head can be prevented. Specifically disclosed is a method for inspecting a magnetic recording medium comprising a non-magnetic substrate and additionally comprising at least a magnetic layer, a protective layer and a lubricant layer all provided on the non-magnetic substrate. The method is characterized by comprising exposing the magnetic recording medium to an atmosphere containing a siloxane and determining the resistance of the magnetic recording medium against environmental substances based on the amount of the siloxane attached to the surface of the magnetic recording medium.

Description

technical field [0001] The present invention relates to a method for inspecting a magnetic recording medium, a magnetic recording medium, and a magnetic recording and reproducing device. [0002] this application claims priority based on Japanese Patent Application No. 2009-66736 for which it applied in Japan on March 18, 2009, and the content is taken in here. Background technique [0003] At present, the recording density of magnetic recording and reproducing devices is 400 Gbit / square inch, and it is considered that the recording density of magnetic recording and reproducing devices will continue to be increased in the future. Furthermore, in order to increase the recording density of magnetic recording and reproducing devices, development of magnetic recording media suitable for high recording densities has been carried out. As such a magnetic recording medium, the following configuration has become the mainstream: after laminating a recording layer or the like on a sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/84
CPCG11B5/84Y10T436/20G11B5/7257G11B5/7266
Inventor 加藤顺也丸山良彦
Owner RESONAC HOLDINGS CORPORATION
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