Invention Grant
- Patent Title: Perpendicular magnetic recording medium and the method of 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.: US11255579Application Date: 2005-10-21
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Publication No.: US07993764B2Publication Date: 2011-08-09
- Inventor: Shunji Takenoiri , Yasushi Sakai
- Applicant: Shunji Takenoiri , Yasushi Sakai
- 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: JP2004-306277 20041021
- Main IPC: G11B5/66
- IPC: G11B5/66

Abstract:
A perpendicular magnetic recording medium includes a soft magnetic backing layer, an underlayer, a nonmagnetic intermediate layer, and a magnetic recording layer sequentially deposited on a nonmagnetic substrate. The underlayer can contain cobalt, nickel, and iron and have an fcc structure and exhibit soft magnetic property. The underlayer preferably contains nickel in a range of 30 to 88 at % and iron in a range of 0.1 to 22 at %. The underlayer can further contain Si, B, Nb, N, Ta, Al, Pd, Cr, or Mo. The nonmagnetic intermediate layer preferably contains at least one element selected from Ru, Re, Pd, Ir, Pt, and Rh. The magnetic recording layer preferably has a granular structure. A seed layer can be further provided between the soft magnetic backing layer and the underlayer.
Public/Granted literature
- US20060093867A1 Perpendicular magnetic recording medium and the method of manufacturing the same Public/Granted day:2006-05-04
Information query
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