WO2008149812A1 - 垂直磁気記録媒体および垂直磁気記録媒体の製造方法 - Google Patents

垂直磁気記録媒体および垂直磁気記録媒体の製造方法 Download PDF

Info

Publication number
WO2008149812A1
WO2008149812A1 PCT/JP2008/060052 JP2008060052W WO2008149812A1 WO 2008149812 A1 WO2008149812 A1 WO 2008149812A1 JP 2008060052 W JP2008060052 W JP 2008060052W WO 2008149812 A1 WO2008149812 A1 WO 2008149812A1
Authority
WO
WIPO (PCT)
Prior art keywords
recording medium
magnetic recording
vertical magnetic
layer
reinforcing layer
Prior art date
Application number
PCT/JP2008/060052
Other languages
English (en)
French (fr)
Inventor
Yoshiaki Sonobe
Kong Kim
Original Assignee
Hoya Corporation
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 filed Critical Hoya Corporation
Priority to JP2009517846A priority Critical patent/JP5260510B2/ja
Priority to US12/602,446 priority patent/US8758911B2/en
Publication of WO2008149812A1 publication Critical patent/WO2008149812A1/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
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73911—Inorganic substrates
    • G11B5/73921—Glass or ceramic substrates
    • 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
    • G11B5/736—Non-magnetic layer under a soft magnetic layer, e.g. between a substrate and a soft magnetic underlayer [SUL] or a keeper 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
    • G11B5/73—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

Abstract

【課題】主記録層と連続層との間に強化層を設け、その新たな組成によって、磁気記録媒体のＳ／Ｎ比を向上させ、記録にじみを減少させることを目的とする。 【解決手段】　本発明における垂直磁気記録媒体１００は、基体１１０上に主記録層１２２、強化層１２４、連続層１２６をこの順に備える垂直磁気記録媒体１００であって、強化層１２４は、グラニュラー構造を有し、強化層１２４の飽和磁化Ｍｓが主記録層１２２の飽和磁化より高いことを特徴としている。
PCT/JP2008/060052 2007-05-30 2008-05-30 垂直磁気記録媒体および垂直磁気記録媒体の製造方法 WO2008149812A1 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2009517846A JP5260510B2 (ja) 2007-05-30 2008-05-30 垂直磁気記録媒体および垂直磁気記録媒体の製造方法
US12/602,446 US8758911B2 (en) 2007-05-30 2008-05-30 Perpendicular magnetic recording medium and perpendicular magnetic recording medium manufacturing method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-144230 2007-05-30
JP2007144230 2007-05-30

Publications (1)

Publication Number Publication Date
WO2008149812A1 true WO2008149812A1 (ja) 2008-12-11

Family

ID=40093630

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/060052 WO2008149812A1 (ja) 2007-05-30 2008-05-30 垂直磁気記録媒体および垂直磁気記録媒体の製造方法

Country Status (3)

Country Link
US (1) US8758911B2 (ja)
JP (1) JP5260510B2 (ja)
WO (1) WO2008149812A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010257564A (ja) * 2009-03-31 2010-11-11 Wd Media Singapore Pte Ltd 垂直磁気記録媒体
JP2014524633A (ja) * 2011-08-25 2014-09-22 シーゲイト テクノロジー エルエルシー 二重連続層を有する記録スタック
WO2020054452A1 (ja) * 2018-09-14 2020-03-19 ソニー株式会社 磁気記録媒体

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009048045A1 (ja) * 2007-10-07 2009-04-16 Hoya Corporation 垂直磁気記録媒体
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
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
US9177586B2 (en) 2008-09-30 2015-11-03 WD Media (Singapore), LLC Magnetic disk and manufacturing method thereof
US8877359B2 (en) * 2008-12-05 2014-11-04 Wd Media (Singapore) Pte. Ltd. Magnetic disk and method for manufacturing same
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
JP2010257567A (ja) 2009-03-30 2010-11-11 Wd Media Singapore Pte Ltd 垂直磁気記録媒体およびその製造方法
US20100300884A1 (en) 2009-05-26 2010-12-02 Wd Media, Inc. Electro-deposited passivation coatings for patterned media
US8496466B1 (en) 2009-11-06 2013-07-30 WD Media, LLC Press system with interleaved embossing foil holders for nano-imprinting of recording media
US9330685B1 (en) 2009-11-06 2016-05-03 WD Media, LLC Press system for nano-imprinting of recording media with a two step pressing method
JP5643516B2 (ja) 2010-01-08 2014-12-17 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
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
JP5634749B2 (ja) 2010-05-21 2014-12-03 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
JP2011248969A (ja) 2010-05-28 2011-12-08 Wd Media (Singapore) Pte. Ltd 垂直磁気ディスク
JP2011248968A (ja) 2010-05-28 2011-12-08 Wd Media (Singapore) Pte. Ltd 垂直磁気ディスク
JP2011248967A (ja) 2010-05-28 2011-12-08 Wd Media (Singapore) Pte. Ltd 垂直磁気ディスクの製造方法
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
US8889275B1 (en) 2010-08-20 2014-11-18 WD Media, LLC Single layer small grain size FePT:C film for heat assisted magnetic recording media
US8743666B1 (en) 2011-03-08 2014-06-03 Western Digital Technologies, Inc. Energy assisted magnetic recording medium capable of suppressing high DC readback noise
US8711499B1 (en) 2011-03-10 2014-04-29 WD Media, LLC Methods for measuring media performance associated with adjacent track interference
US8491800B1 (en) 2011-03-25 2013-07-23 WD Media, LLC Manufacturing of hard masks for patterning magnetic media
US9028985B2 (en) 2011-03-31 2015-05-12 WD Media, LLC Recording media with multiple exchange coupled magnetic layers
US8565050B1 (en) 2011-12-20 2013-10-22 WD Media, LLC Heat assisted magnetic recording media having moment keeper layer
US10002632B2 (en) 2011-12-22 2018-06-19 Seagate Technology Llc Recording medium with thin stabilization layer having high magnetic saturation and anisotropic field characteristics
US9029308B1 (en) 2012-03-28 2015-05-12 WD Media, LLC Low foam media cleaning detergent
US9269480B1 (en) 2012-03-30 2016-02-23 WD Media, LLC Systems and methods for forming magnetic recording media with improved grain columnar growth for energy assisted magnetic recording
US8941950B2 (en) 2012-05-23 2015-01-27 WD Media, LLC Underlayers for heat assisted magnetic recording (HAMR) media
US8993134B2 (en) 2012-06-29 2015-03-31 Western Digital Technologies, Inc. Electrically conductive underlayer to grow FePt granular media with (001) texture on glass substrates
US9034492B1 (en) 2013-01-11 2015-05-19 WD Media, LLC Systems and methods for controlling damping of magnetic media for heat assisted magnetic recording
US10115428B1 (en) 2013-02-15 2018-10-30 Wd Media, Inc. HAMR media structure having an anisotropic thermal barrier layer
US9153268B1 (en) 2013-02-19 2015-10-06 WD Media, LLC Lubricants comprising fluorinated graphene nanoribbons for magnetic recording media structure
US9183867B1 (en) 2013-02-21 2015-11-10 WD Media, LLC Systems and methods for forming implanted capping layers in magnetic media for magnetic recording
US9196283B1 (en) 2013-03-13 2015-11-24 Western Digital (Fremont), Llc Method for providing a magnetic recording transducer using a chemical buffer
US9190094B2 (en) 2013-04-04 2015-11-17 Western Digital (Fremont) Perpendicular recording media with grain isolation initiation layer and exchange breaking layer for signal-to-noise ratio enhancement
US9093122B1 (en) 2013-04-05 2015-07-28 WD Media, LLC Systems and methods for improving accuracy of test measurements involving aggressor tracks written to disks of hard disk drives
US8947987B1 (en) 2013-05-03 2015-02-03 WD Media, LLC Systems and methods for providing capping layers for heat assisted magnetic recording media
US8867322B1 (en) 2013-05-07 2014-10-21 WD Media, LLC Systems and methods for providing thermal barrier bilayers for heat assisted magnetic recording media
US9296082B1 (en) 2013-06-11 2016-03-29 WD Media, LLC Disk buffing apparatus with abrasive tape loading pad having a vibration absorbing layer
US9406330B1 (en) 2013-06-19 2016-08-02 WD Media, LLC Method for HDD disk defect source detection
US9607646B2 (en) 2013-07-30 2017-03-28 WD Media, LLC Hard disk double lubrication layer
US9389135B2 (en) 2013-09-26 2016-07-12 WD Media, LLC Systems and methods for calibrating a load cell of a disk burnishing machine
US9177585B1 (en) 2013-10-23 2015-11-03 WD Media, LLC Magnetic media capable of improving magnetic properties and thermal management for heat-assisted magnetic recording
US9581510B1 (en) 2013-12-16 2017-02-28 Western Digital Technologies, Inc. Sputter chamber pressure gauge with vibration absorber
US9382496B1 (en) 2013-12-19 2016-07-05 Western Digital Technologies, Inc. Lubricants with high thermal stability for heat-assisted magnetic recording
US9824711B1 (en) 2014-02-14 2017-11-21 WD Media, LLC Soft underlayer for heat assisted magnetic recording media
US9447368B1 (en) 2014-02-18 2016-09-20 WD Media, LLC Detergent composition with low foam and high nickel solubility
US9431045B1 (en) 2014-04-25 2016-08-30 WD Media, LLC Magnetic seed layer used with an unbalanced soft underlayer
US9042053B1 (en) 2014-06-24 2015-05-26 WD Media, LLC Thermally stabilized perpendicular magnetic recording medium
US9159350B1 (en) 2014-07-02 2015-10-13 WD Media, LLC High damping cap layer for magnetic recording media
US10054363B2 (en) 2014-08-15 2018-08-21 WD Media, LLC Method and apparatus for cryogenic dynamic cooling
US9082447B1 (en) 2014-09-22 2015-07-14 WD Media, LLC Determining storage media substrate material type
US9227324B1 (en) 2014-09-25 2016-01-05 WD Media, LLC Mandrel for substrate transport system with notch
US8995078B1 (en) 2014-09-25 2015-03-31 WD Media, LLC Method of testing a head for contamination
US9685184B1 (en) 2014-09-25 2017-06-20 WD Media, LLC NiFeX-based seed layer for magnetic recording media
US9449633B1 (en) 2014-11-06 2016-09-20 WD Media, LLC Smooth structures for heat-assisted magnetic recording media
US9818442B2 (en) 2014-12-01 2017-11-14 WD Media, LLC Magnetic media having improved magnetic grain size distribution and intergranular segregation
US9401300B1 (en) 2014-12-18 2016-07-26 WD Media, LLC Media substrate gripper including a plurality of snap-fit fingers
US9218850B1 (en) 2014-12-23 2015-12-22 WD Media, LLC Exchange break layer for heat-assisted magnetic recording media
US9257134B1 (en) 2014-12-24 2016-02-09 Western Digital Technologies, Inc. Allowing fast data zone switches on data storage devices
US9990940B1 (en) 2014-12-30 2018-06-05 WD Media, LLC Seed structure for perpendicular magnetic recording media
US9280998B1 (en) 2015-03-30 2016-03-08 WD Media, LLC Acidic post-sputter wash for magnetic recording media
US9822441B2 (en) 2015-03-31 2017-11-21 WD Media, LLC Iridium underlayer for heat assisted magnetic recording media
US9275669B1 (en) 2015-03-31 2016-03-01 WD Media, LLC TbFeCo in PMR media for SNR improvement
US11074934B1 (en) 2015-09-25 2021-07-27 Western Digital Technologies, Inc. Heat assisted magnetic recording (HAMR) media with Curie temperature reduction layer
US10236026B1 (en) 2015-11-06 2019-03-19 WD Media, LLC Thermal barrier layers and seed layers for control of thermal and structural properties of HAMR media
US9406329B1 (en) 2015-11-30 2016-08-02 WD Media, LLC HAMR media structure with intermediate layer underlying a magnetic recording layer having multiple sublayers
US10121506B1 (en) 2015-12-29 2018-11-06 WD Media, LLC Magnetic-recording medium including a carbon overcoat implanted with nitrogen and hydrogen
JP7107765B2 (ja) * 2018-06-25 2022-07-27 昭和電工株式会社 アシスト磁気記録媒体および磁気記憶装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005056555A (ja) * 2003-08-01 2005-03-03 Agency For Science Technology & Research ハードディスクドライブのための傾斜媒体
JP2006048900A (ja) * 2004-07-05 2006-02-16 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体
JP2006209943A (ja) * 2005-01-26 2006-08-10 Hitachi Global Storage Technologies Netherlands Bv 垂直記録層に磁気トルク層を結合した垂直磁気記録媒体
JP2008176858A (ja) * 2007-01-18 2008-07-31 Hitachi Global Storage Technologies Netherlands Bv 垂直磁気記録媒体、及びそれを用いたハードディスクドライブ

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020192506A1 (en) * 2001-06-04 2002-12-19 International Business Machines Corporation `Thermal Spring' magnetic recording media for writing using magnetic and thermal gradients
JP2003162807A (ja) * 2001-11-27 2003-06-06 Toshiba Corp 垂直磁気記録媒体及びこれを用いた磁気記録再生装置
US7470474B2 (en) * 2003-04-07 2008-12-30 Kabushiki Kaisha Toshiba Magnetic recording medium, production process thereof, and magnetic recording and reproducing apparatus including both oxide and non-oxide perpendicular magnetic layers
WO2006135034A1 (en) * 2005-06-13 2006-12-21 Tohoku University Magnetic recording medium and magnetic recording and reproducing apparatus
KR100723407B1 (ko) * 2005-07-12 2007-05-30 삼성전자주식회사 기록층의 특성이 제어된 수직 자기 기록 매체 및 그 제조방법
US7678476B2 (en) * 2006-01-20 2010-03-16 Seagate Technology Llc Composite heat assisted magnetic recording media with temperature tuned intergranular exchange
JP2007220177A (ja) * 2006-02-15 2007-08-30 Fujitsu Ltd 垂直磁気記録媒体
JP2007273057A (ja) * 2006-03-31 2007-10-18 Fujitsu Ltd 垂直磁気記録媒体および磁気記憶装置
JP4623594B2 (ja) * 2006-09-05 2011-02-02 富士電機ホールディングス株式会社 垂直磁気記録媒体
US7582368B2 (en) * 2006-09-14 2009-09-01 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording medium with an exchange-spring recording structure and a lateral coupling layer for increasing intergranular exchange coupling
US7572526B2 (en) * 2007-02-18 2009-08-11 Hitachi Global Storage Technologies Netherlands B.V. Perpendicular magnetic recording medium with exchange-spring structure having multiple exchange-spring layers and recording system for the medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005056555A (ja) * 2003-08-01 2005-03-03 Agency For Science Technology & Research ハードディスクドライブのための傾斜媒体
JP2006048900A (ja) * 2004-07-05 2006-02-16 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体
JP2006209943A (ja) * 2005-01-26 2006-08-10 Hitachi Global Storage Technologies Netherlands Bv 垂直記録層に磁気トルク層を結合した垂直磁気記録媒体
JP2008176858A (ja) * 2007-01-18 2008-07-31 Hitachi Global Storage Technologies Netherlands Bv 垂直磁気記録媒体、及びそれを用いたハードディスクドライブ

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010257564A (ja) * 2009-03-31 2010-11-11 Wd Media Singapore Pte Ltd 垂直磁気記録媒体
JP2014524633A (ja) * 2011-08-25 2014-09-22 シーゲイト テクノロジー エルエルシー 二重連続層を有する記録スタック
WO2020054452A1 (ja) * 2018-09-14 2020-03-19 ソニー株式会社 磁気記録媒体
US11468910B2 (en) 2018-09-14 2022-10-11 Sony Corporation Magnetic recording medium having reinforced substrate
JP7367685B2 (ja) 2018-09-14 2023-10-24 ソニーグループ株式会社 磁気記録媒体

Also Published As

Publication number Publication date
JP5260510B2 (ja) 2013-08-14
JPWO2008149812A1 (ja) 2010-08-26
US8758911B2 (en) 2014-06-24
US20100190035A1 (en) 2010-07-29

Similar Documents

Publication Publication Date Title
WO2008149812A1 (ja) 垂直磁気記録媒体および垂直磁気記録媒体の製造方法
SG159491A1 (en) Method for manufacturing magnetic recording medium and magnetic recording medium
SG170812A1 (en) Perpendicular magnetic recording disk and method of manufacturing the same
WO2009041423A1 (ja) 垂直磁気記録媒体およびその製造方法
SG196834A1 (en) Magnetic recording medium and manufacturing method of the magnetic recording medium
WO2008099859A1 (ja) 磁気記録媒体、磁気記録媒体の製造方法、及び磁気ディスク
SG164353A1 (en) Single-sided perpendicular magnetic recording medium
SG141396A1 (en) Magnetic recording medium and method for manufacturing magnetic recording medium
WO2008123446A1 (ja) 磁気記録媒体
SG115827A1 (en) Co alloy target and its production method, soft magnetic film for perpendicular magnetic recording and perpendicular magnetic recording medium
SG113516A1 (en) Perpendicular magnetic recording medium and a method for manufacturing the same
TWI346327B (en) Magnetic recording medium, method for production thereof
SG124392A1 (en) Patterned magnetic recording media, stamper manufacture of patterned magnetic recording media, of manufacturing patterned magnetic recording media, and magnetic recording/reproduction apparaus
SG124376A1 (en) Perpendicular magnetic recording medium with magnetic torque layer coupled to the perpendicular recording layer
SG170815A1 (en) Perpendicular magnetic recording disk and method of manufacturing the same
MY141147A (en) Method of fabricating a magnetic discrete track recording disk
WO2008105095A1 (ja) 垂直磁気記録媒体および磁気記録装置
WO2008114611A1 (ja) 磁性合金、アモルファス合金薄帯、および磁性部品
SG119282A1 (en) Patterned disk medium for vertical magnetic recording and magnetic disk drive with the medium
DE602006003939D1 (de) Herstellung eines magnetischen Aufzeichnungsmediums
SG116645A1 (en) glass substrate for perpendicular magnetic recording disk and method of producing same.
EP1959436A3 (en) Magnetic head and method of manufacturing the same
WO2006118677A3 (en) HIGHLY ORDERED L10 FePT NANOMAGNETS FOR DATA STORAGE AND MAGNETIC SENSING AND METHOD OF MAKING
SG148956A1 (en) Patterned magnetic media for magnetic recording
SG136800A1 (en) Magnetoresistive head and manufacturing method thereof

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08764920

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2009517846

Country of ref document: JP

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 12602446

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08764920

Country of ref document: EP

Kind code of ref document: A1