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Magentic recording medium for heat assisted recording and method for fabricating same

一种磁记录介质、记录方式的技术，应用在磁记录、磁记录层、数据记录等方向，能够解决磁记录层劣化、不适合实用等问题

Inactive Publication Date: 2015-06-03
FUJI ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors of the present invention have found that although the above method is carried out, O at the time of film formation 2 The gas will oxidize the magnetic recording layer, thereby deteriorating the magnetic recording layer, which is not suitable for practical use.

Method used

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  • Magentic recording medium for heat assisted recording and method for fabricating same
  • Magentic recording medium for heat assisted recording and method for fabricating same
  • Magentic recording medium for heat assisted recording and method for fabricating same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In embodiment 1, such as figure 2 As shown, a non-magnetic substrate 1, a Co-based soft magnetic substrate layer 2, a base layer 3 made of Ru, CoCrPt-SiO 2 The granular magnetic recording layer 4, the first lower protective layer 5a made of Si, and the first lower protective layer 5a made of SiO 2 A magnetic recording medium consisting of a first upper protective layer 5b, a second protective layer 6 made of DLC, and a lubricating layer (not shown).

[0055] Below, based on figure 1 and figure 2 Examples will be described. As the non-magnetic substrate 1 , a disk-shaped chemically strengthened glass substrate (HOYA Co., Ltd. N-10) with a smooth surface was used. First, the cleaned non-magnetic substrate 1 is introduced into a film forming apparatus. Film formation from the soft magnetic substrate layer 2 to the second protective layer 6 is not exposed to the atmosphere, and all film formation is performed in an in-line film formation apparatus.

[0056] In an Ar...

Embodiment 2

[0062] Except for using Al as the material of the first protective layer 5 and changing the film thickness of the second protective layer 6 to 2.0 nm, 1.5 nm, 1.0 nm, and 0.5 nm, it was prepared in the same manner as in Example 1, and evaluated. The results are shown in Table 2.

Embodiment 3

[0064] Except having used Cu as the material of the 1st protective layer 5, and having set the film thickness of the 2nd protective layer 6 to 2.0 nm, 1.5 nm, 1.0 nm, and 0.5 nm, it produced similarly to Example 1, and evaluated it. The results are shown in Table 2.

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Abstract

This magnetic recording medium for heat assisted recording comprises a magnetic recording layer upon a non-magnetic substrate, and a protective layer atop the magnetic recording layer. The protective layer further comprises a first lower protective layer atop the magnetic recording layer, a first upper protective layer atop the first lower protective layer, and a second protective layer atop the first upper protective layer. The first lower protective layer has, as a primary constituent, an element selected from a group which consists of silicon, aluminum, and copper. The first upper protective layer is configured from an oxide of the material of the first lower protective layer.

Description

technical field [0001] The present invention relates to a magnetic recording medium used in a thermally assisted recording system and a method of manufacturing the same. Background technique [0002] As the recording capacity of the hard disk drive continues to increase, the recording density of the mounted magnetic recording medium also continues to increase. At the same time, the levitation height of the magnetic head used for magnetic recording is required to be reduced year by year, and the distance (magnetic gap) between the magnetic head and the magnetic recording layer is gradually reduced. One method of reducing the magnetic gap is to thin the protective layer formed on the magnetic recording layer. [0003] The protective layer, as the name implies, plays the role of protecting the magnetic recording layer. In order to prevent the magnetic recording layer made of metal materials from reacting with moisture and corrosive gases in the atmosphere and corrode, the prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B5/72G11B5/84
CPCG11B5/8408G11B5/7264
Inventor 佐藤成实熊谷明恭片野智纪谷口克己
Owner FUJI ELECTRIC CO LTD
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