WO2008123446A1 - 磁気記録媒体 - Google Patents

磁気記録媒体 Download PDF

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Publication number
WO2008123446A1
WO2008123446A1 PCT/JP2008/056172 JP2008056172W WO2008123446A1 WO 2008123446 A1 WO2008123446 A1 WO 2008123446A1 JP 2008056172 W JP2008056172 W JP 2008056172W WO 2008123446 A1 WO2008123446 A1 WO 2008123446A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetic recording
layer
recording medium
substrate
orientation control
Prior art date
Application number
PCT/JP2008/056172
Other languages
English (en)
French (fr)
Inventor
Teiichiro Umezawa
Masafumi Ishiyama
Kenji Ayama
Tokichiro Sato
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
Application filed by Hoya Corporation, Hoya Magnetics Singapore Pte. Ltd filed Critical Hoya Corporation
Priority to US12/594,043 priority Critical patent/US8142916B2/en
Publication of WO2008123446A1 publication Critical patent/WO2008123446A1/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
    • G11B5/7369—Two or more non-magnetic underlayers, e.g. seed layers or barrier layers
    • G11B5/737—Physical structure of underlayer, e.g. texture
    • 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
    • G11B5/672—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 different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements
    • 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

Abstract

　磁気記録層の結晶配向性をさらに向上させることにより、磁性粒を微細化しても高いＳ／Ｎ比と保磁力Ｈｃを維持し、高記録密度化を図ることが可能な磁気記録媒体を提供することを目的とする。基板上に配向制御層１６、非磁性の下地層１８、磁気記録層２２を備える磁気記録媒体において、配向制御層１６はｆｃｃ構造であって（１１１）面が基板に平行であり、下地層１８はｈｃｐ構造であって（０００１）面が基板に平行であり、配向制御層１６の（１１１）面の原子間距離は、下地層１８の格子間隔に対して－０．２Å～＋０．１５Åであることを特徴とする（図１）。    
PCT/JP2008/056172 2007-03-30 2008-03-28 磁気記録媒体 WO2008123446A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/594,043 US8142916B2 (en) 2007-03-30 2008-03-28 Magnetic recording medium

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007095750 2007-03-30
JP2007-095750 2007-03-30

Publications (1)

Publication Number Publication Date
WO2008123446A1 true WO2008123446A1 (ja) 2008-10-16

Family

ID=39830931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/056172 WO2008123446A1 (ja) 2007-03-30 2008-03-28 磁気記録媒体

Country Status (3)

Country Link
US (1) US8142916B2 (ja)
JP (1) JP2008276915A (ja)
WO (1) WO2008123446A1 (ja)

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JP2010257566A (ja) * 2009-03-31 2010-11-11 Wd Media Singapore Pte Ltd 垂直磁気記録媒体
US20110097604A1 (en) * 2008-03-31 2011-04-28 Wd Media (Singapore) Pte. Ltd. Perpendicular magnetic recording medium
US20110242702A1 (en) * 2010-03-30 2011-10-06 Kabushiki Kaisha Toshiba Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproduction apparatus

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JP2009238299A (ja) 2008-03-26 2009-10-15 Hoya Corp 垂直磁気記録媒体および垂直磁気記録媒体の製造方法
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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WO2010064724A1 (ja) * 2008-12-05 2010-06-10 Hoya株式会社 磁気ディスク及びその製造方法
WO2010116908A1 (ja) 2009-03-28 2010-10-14 Hoya株式会社 磁気ディスク用潤滑剤化合物及び磁気ディスク
JP5395991B2 (ja) * 2009-03-29 2014-01-22 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 垂直磁気記録媒体の製造方法
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JP5574414B2 (ja) 2010-03-29 2014-08-20 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 磁気ディスクの評価方法及び磁気ディスクの製造方法
JP5645476B2 (ja) 2010-05-21 2014-12-24 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 垂直磁気ディスク
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JP2010257566A (ja) * 2009-03-31 2010-11-11 Wd Media Singapore Pte Ltd 垂直磁気記録媒体
US20110242702A1 (en) * 2010-03-30 2011-10-06 Kabushiki Kaisha Toshiba Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproduction apparatus
US10100398B2 (en) 2010-03-30 2018-10-16 Kabushiki Kaisha Toshiba Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproduction apparatus

Also Published As

Publication number Publication date
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US8142916B2 (en) 2012-03-27
US20100119878A1 (en) 2010-05-13

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