发明授权
- 专利标题: Perpendicular magnetic recording media and methods for producing the same
- 专利标题(中): 垂直磁记录介质及其制造方法
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申请号: US13166002申请日: 2011-06-22
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公开(公告)号: US09472227B2公开(公告)日: 2016-10-18
- 发明人: Hi Shin , Iwao Okamoto
- 申请人: Hi Shin , Iwao Okamoto
- 申请人地址: US CA Irvine
- 专利权人: WD Media (Singapore) Pte. Ltd.
- 当前专利权人: WD Media (Singapore) Pte. Ltd.
- 当前专利权人地址: US CA Irvine
- 代理机构: Sughrue Mion, PLLC
- 优先权: JP2010-141238 20100622
- 主分类号: G11B5/73
- IPC分类号: G11B5/73 ; G11B5/738
摘要:
[Problem] An object is to provide a perpendicular magnetic recording medium that can realize both improvement in crystal orientation and refinement of crystal grain size and can achieve a higher recording density and a higher SN ratio, and a method of manufacturing the same.[Solution] A perpendicular magnetic recording medium 100 of the present invention is a perpendicular magnetic recording medium 100 having a base plate 100, and a laminate film including a first ground layer 150a provided on the base plate 100, a second ground layer 150b provided on the first ground layer 150a, and a main recording layer 160 provided on the second ground layer 150b and containing a magnetic material having a granular structure, wherein the magnetic material which constitutes the main recording layer 160 contains a CoCrPt alloy, and a material which constitutes the second ground layer 150b contains an Ru—Co oxide alloy.
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