Invention Grant
- Patent Title: Perpendicular magnetic recording medium and method for manufacturing the same
- Patent Title (中): 垂直磁记录介质及其制造方法
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Application No.: US11063232Application Date: 2005-02-22
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Publication No.: US07498093B2Publication Date: 2009-03-03
- Inventor: Kazuyoshi Shibata
- Applicant: Kazuyoshi Shibata
- 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: JP2004-048463 20040224
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
There is provided a perpendicular magnetic recording medium which causes low media noise and achieves preferable read/write performance. A perpendicular magnetic layer is constructed such that first magnetic layers formed of Co or Co containing an oxide and second magnetic layers formed of Pt or Pd containing an oxide are layered. The perpendicular magnetic layer is provided on a non-magnetic substrate via a Ru underlayer containing oxygen. An alignment control layer formed of a Ni—Fe alloy is provided between the non-magnetic substrate and the underlayer to control the crystal alignment of the underlayer. A soft magnetic backing layer is provided between the substrate and the alignment control layer.
Public/Granted literature
- US20050196641A1 Perpendicular magnetic recording medium and method for manufacturing the same Public/Granted day:2005-09-08
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