Invention Application
- Patent Title: PERPENDICULAR MAGNETIC RECORDING MEDIUM AND ITS MANUFACTURING METHOD
- Patent Title (中): 全能磁记录介质及其制造方法
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Application No.: US13522261Application Date: 2011-01-12
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Publication No.: US20130040167A1Publication Date: 2013-02-14
- Inventor: Perumal Alagarsamy , Yukiko Takahashi , Kazuhiro Hono , Tomoko Seki
- Applicant: Perumal Alagarsamy , Yukiko Takahashi , Kazuhiro Hono , Tomoko Seki
- Applicant Address: US CA Irvine JP Tsukuba-shi, Ibaraki
- Assignee: WD MEDIA (SINGAPORE) PTE. LTD.,NATIONAL INSTITUTE FOR MATERIALS SCIENCE
- Current Assignee: WD MEDIA (SINGAPORE) PTE. LTD.,NATIONAL INSTITUTE FOR MATERIALS SCIENCE
- Current Assignee Address: US CA Irvine JP Tsukuba-shi, Ibaraki
- Priority: JP2010-005598 20100114
- International Application: PCT/JP2011/050316 WO 20110112
- Main IPC: G11B5/738
- IPC: G11B5/738 ; G11B5/851 ; G11B5/667

Abstract:
It is aimed to provide a perpendicular magnetic recording medium capable of dealing with an ultra-higher recording density than before and its manufacturing method.The present invention concerns a perpendicular magnetic recording medium including at least a seed layer made of noncrystalline ceramic, a crystalline orientation control layer and a magnetic layer made of a material mainly containing a FePt alloy in this order on a substrate. This perpendicular magnetic recording medium is suitably manufactured by forming at least the seed layer, the orientation control layer and the magnetic layer made of the material mainly containing the FePt alloy in this order on the substrate by sputtering, wherein the magnetic layer is formed at a predetermined temperature of 500° C. or less.
Public/Granted literature
- US3169773A Controller Public/Granted day:1965-02-16
Information query
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