Invention Grant
- Patent Title: Manufacturing method of magnetic recording medium and magnetic recording/reproducing apparatus
- Patent Title (中): 磁记录介质和磁记录/重放装置的制造方法
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Application No.: US12693779Application Date: 2010-01-26
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Publication No.: US08367155B2Publication Date: 2013-02-05
- Inventor: Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa
- Applicant: Atsushi Hashimoto , Yuzo Sasaki , Gohei Kurokawa
- Applicant Address: JP Tokyo
- Assignee: Showa Denko K.K.
- Current Assignee: Showa Denko K.K.
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: JP2009-021943 20090202
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
There is provided a manufacturing method of a magnetic recording medium that maintains a high level of perpendicular orientation of a perpendicular magnetic layer and enables to further increase high recording density, prepared such that at least on a non-magnetic substrate, there are laminated a soft magnetic base layer, an orientation control layer 11 that controls the orientation of the layer immediately thereabove, and a perpendicular magnetic layer with a magnetization easy axis thereof primarily oriented perpendicular to the non-magnetic substrate. The manufacturing method is characterized in that when configuring the perpendicular magnetic layer with two or more magnetic layers 12 to 14 and crystal-growing each layer so that the crystal grains that constitute the respective magnetic layers 12 to 14, together with the crystal grains that constitute the orientation control layer 11, form column-shaped crystals S1 to S3 in a consecutive manner in the thickness direction, lamination of the orientation control layer 11 is performed while the substrate is being cooled or immediately after the substrate has been cooled.
Public/Granted literature
- US20100195246A1 MANUFACTURING METHOD OF MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS Public/Granted day:2010-08-05
Information query
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