Invention Grant
- Patent Title: Magnetic recording media and method of manufacture of the same
- Patent Title (中): 磁记录介质及其制造方法
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Application No.: US12041770Application Date: 2008-03-04
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Publication No.: US07879468B2Publication Date: 2011-02-01
- Inventor: Shinji Uchida
- Applicant: Shinji Uchida
- Applicant Address: JP
- Assignee: Fuji Electric Device Technology Co., Ltd.
- Current Assignee: Fuji Electric Device Technology Co., Ltd.
- Current Assignee Address: JP
- Agency: Rossi, Kimms & McDowell LLP
- Priority: JP2007-054546 20070305
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
A magnetic recording medium is disclosed in which there is no degradation of magnetic characteristics at the time of manufacture, such as is seen in proposed discrete-track media or patterned media. The medium can be manufactured by a simple method and results in excellent productivity. Magnetic recording media have a substrate, and, provided thereon in order from the substrate side, are a soft magnetic layer, a crystal orientation control layer, and a magnetic recording layer. The area of at least a portion of the crystal orientation control layer is provided with a depressed portion. Portions of the magnetic layer formed on this depressed portion have a non-granular structure, whereas portions of the magnetic formed on the crystal orientation control layer outside the depressed portion have a granular structure. A method for manufacturing the magnetic recording media is disclosed having a soft magnetic layer formation process of forming a soft magnetic layer on a substrate; a crystal orientation layer formation process of providing a crystal orientation control layer on the soft magnetic layer; a depressed portion formation process of providing a depressed portion in the area of at least a portion of the crystal orientation control layer; and a process of forming a magnetic recording layer on the crystal orientation control layer on which the depressed portion is formed.
Public/Granted literature
- US20080218906A1 MAGNETIC RECORDING MEDIA AND METHOD OF MANUFACTURE OF THE SAME Public/Granted day:2008-09-11
Information query
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