WO2009051090A1 - 垂直磁気記録媒体 - Google Patents

垂直磁気記録媒体 Download PDF

Info

Publication number
WO2009051090A1
WO2009051090A1 PCT/JP2008/068536 JP2008068536W WO2009051090A1 WO 2009051090 A1 WO2009051090 A1 WO 2009051090A1 JP 2008068536 W JP2008068536 W JP 2008068536W WO 2009051090 A1 WO2009051090 A1 WO 2009051090A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic recording
recording medium
vertical magnetic
layer
base layer
Prior art date
Application number
PCT/JP2008/068536
Other languages
English (en)
French (fr)
Inventor
Kazuaki Sakamoto
Kong Kim
Takahiro Onoue
Masafumi Ishiyama
Teiichiro Umezawa
Kenji Ayama
Original Assignee
Hoya Corporation
Hoya Magnetics Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2007267421A external-priority patent/JP5105594B2/ja
Priority claimed from JP2007286648A external-priority patent/JP2009116932A/ja
Priority claimed from JP2008088141A external-priority patent/JP5227634B2/ja
Application filed by Hoya Corporation, Hoya Magnetics Singapore Pte. Ltd. filed Critical Hoya Corporation
Priority to US12/738,201 priority Critical patent/US9159351B2/en
Publication of WO2009051090A1 publication Critical patent/WO2009051090A1/ja

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7379—Seed layer, e.g. at least one non-magnetic layer is specifically adapted as a seed or seeding layer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/674—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having differing macroscopic or microscopic structures, e.g. differing crystalline lattices, varying atomic structures or differing roughnesses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G11B5/737—Physical structure of underlayer, e.g. texture

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

　垂直磁気記録媒体であって、基板と、軟磁性層と、前下地層と、下地層と、磁気記録層である主記録層とを具備し、前下地層は、下地層の結晶粒子の下地となるシード結晶粒子と、シード結晶粒子の間に添加される、シード結晶粒子を構成する元素よりも小さな原子半径を有する元素で構成される添加物質とを含む。
PCT/JP2008/068536 2007-10-15 2008-10-14 垂直磁気記録媒体 WO2009051090A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/738,201 US9159351B2 (en) 2007-10-15 2008-10-14 Perpendicular magnetic recording medium and method of manufacturing the same

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2007267421A JP5105594B2 (ja) 2007-10-15 2007-10-15 垂直磁気記録媒体
JP2007-267421 2007-10-15
JP2007-286648 2007-11-02
JP2007286648A JP2009116932A (ja) 2007-11-02 2007-11-02 垂直磁気記録媒体
JP2008088141A JP5227634B2 (ja) 2008-03-28 2008-03-28 垂直磁気記録媒体及び垂直磁気記録媒体の製造方法
JP2008-088141 2008-03-28

Publications (1)

Publication Number Publication Date
WO2009051090A1 true WO2009051090A1 (ja) 2009-04-23

Family

ID=40567354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/068536 WO2009051090A1 (ja) 2007-10-15 2008-10-14 垂直磁気記録媒体

Country Status (2)

Country Link
US (1) US9159351B2 (ja)
WO (1) WO2009051090A1 (ja)

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Publication number Priority date Publication date Assignee Title
JP2011076682A (ja) * 2009-09-30 2011-04-14 Wd Media Singapore Pte Ltd 垂直磁気記録媒体
US20120050914A1 (en) * 2010-08-26 2012-03-01 Showa Denko K.K. Perpendicular magnetic recording medium and magentic recording and reproducing apparatus
JP2016129080A (ja) * 2015-01-09 2016-07-14 山陽特殊製鋼株式会社 Ｎｉ−Ｃｕ系磁気記録媒体のシード層用合金およびスパッタリングターゲット材並びに磁気記録媒体

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JP5117895B2 (ja) 2008-03-17 2013-01-16 ダブリュディ・メディア・シンガポール・プライベートリミテッド 磁気記録媒体及びその製造方法
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JP5453666B2 (ja) 2008-03-30 2014-03-26 ダブリュディ・メディア・シンガポール・プライベートリミテッド 磁気ディスク及びその製造方法
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JP2012009086A (ja) 2010-06-22 2012-01-12 Wd Media (Singapore) Pte. Ltd 垂直磁気記録媒体及びその製造方法
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