Invention Grant
- Patent Title: Method for producing magnetic recording medium and magnetic recording/reproducing apparatus
- Patent Title (中): 磁记录介质的制造方法和磁记录/重放装置
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Application No.: US12745879Application Date: 2008-11-28
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Publication No.: US08394514B2Publication Date: 2013-03-12
- Inventor: Masato Fukushima , Akira Sakawaki , Akira Yamane
- Applicant: Masato Fukushima , Akira Sakawaki , Akira Yamane
- 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: JP2007-312253 20071203
- International Application: PCT/JP2008/071626 WO 20081128
- International Announcement: WO2009/072439 WO 20090611
- Main IPC: G11B5/64
- IPC: G11B5/64

Abstract:
A method for producing a magnetic recording medium having a magnetically partitioned magnetic recording pattern on a surface of a nonmagnetic substrate, which comprises the following steps. Step (A) of forming a magnetic layer on a non-magnetic substrate, step (B) of forming a carbon layer on the magnetic layer, step (C) of forming a resist layer on the carbon layer, step (D) of forming a negative pattern of magnetic recording pattern on the resist layer, step (E) of removing the portions of resist layer and carbon layer in regions corresponding to the negative pattern, step (F) of removing at least a surface layer portion of the magnetic layer in the regions corresponding to the negative pattern, and optional step (G) of removing the residual resist layer and carbon layer. The produced magnetic recording medium has a recording/reproducing property equal to or better than conventional ones and exhibits a high recording density.
Public/Granted literature
- US20100271730A1 METHOD FOR PRODUCING MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCING APPARATUS Public/Granted day:2010-10-28
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