DE3850833D1 - Magnetischer Aufzeichnungsträger. - Google Patents

Magnetischer Aufzeichnungsträger.

Info

Publication number
DE3850833D1
DE3850833D1 DE3850833T DE3850833T DE3850833D1 DE 3850833 D1 DE3850833 D1 DE 3850833D1 DE 3850833 T DE3850833 T DE 3850833T DE 3850833 T DE3850833 T DE 3850833T DE 3850833 D1 DE3850833 D1 DE 3850833D1
Authority
DE
Germany
Prior art keywords
record carrier
magnetic record
magnetic
carrier
record
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
DE3850833T
Other languages
English (en)
Other versions
DE3850833T2 (de
Inventor
Osamu Kitakami
Hideo Fujiwara
Yoichi Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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 Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Application granted granted Critical
Publication of DE3850833D1 publication Critical patent/DE3850833D1/de
Publication of DE3850833T2 publication Critical patent/DE3850833T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G11B5/64—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
    • G11B5/676—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 magnetic layers separated by a nonmagnetic layer, e.g. antiferromagnetic layer, Cu layer or coupling 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
    • G11B5/736—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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
    • G11B5/653—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition containing Fe or Ni
    • 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
    • G11B2005/0002—Special dispositions or recording techniques
    • G11B2005/0026—Pulse recording
    • G11B2005/0029—Pulse recording using magnetisation components of the recording layer disposed mainly perpendicularly to the record carrier surface
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
DE3850833T 1987-09-21 1988-09-20 Magnetischer Aufzeichnungsträger. Expired - Fee Related DE3850833T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP23688487 1987-09-21
JP23688387 1987-09-21
JP63057918A JP2524514B2 (ja) 1987-09-21 1988-03-11 磁気記録媒体

Publications (2)

Publication Number Publication Date
DE3850833D1 true DE3850833D1 (de) 1994-09-01
DE3850833T2 DE3850833T2 (de) 1994-11-17

Family

ID=27296421

Family Applications (1)

Application Number Title Priority Date Filing Date
DE3850833T Expired - Fee Related DE3850833T2 (de) 1987-09-21 1988-09-20 Magnetischer Aufzeichnungsträger.

Country Status (5)

Country Link
US (1) US5543221A (de)
EP (1) EP0309202B1 (de)
JP (1) JP2524514B2 (de)
KR (1) KR890005661A (de)
DE (1) DE3850833T2 (de)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5750230A (en) * 1992-11-20 1998-05-12 Hitachi, Ltd. Magnetic recording media and magnetic recording system using the same
JPH06176340A (ja) * 1992-12-07 1994-06-24 Victor Co Of Japan Ltd 垂直磁気記録媒体
US5736262A (en) * 1994-12-05 1998-04-07 Mitsubishi Chemical Corporation Magnetic recording medium
JP3585671B2 (ja) * 1995-11-14 2004-11-04 シャープ株式会社 光磁気記録媒体及びその再生方法
US5820963A (en) * 1997-04-02 1998-10-13 Komag, Incorporated Method of manufacturing a thin film magnetic recording medium having low MrT value and high coercivity
US5840394A (en) * 1997-04-02 1998-11-24 Komag, Incorporated Method of manufacturing a thin film magnetic recording medium having low MrT value and high coercivity
US6387483B1 (en) * 1997-12-18 2002-05-14 Nec Corporation Perpendicular magnetic recording medium and manufacturing process therefor
US6432562B1 (en) 1998-09-25 2002-08-13 Seagate Technology Llc Magnetic recording medium with a nialru seedlayer
US6383667B1 (en) 1998-10-09 2002-05-07 Hitachi, Ltd. Magnetic recording medium
US6495252B1 (en) * 1999-07-22 2002-12-17 Seagate Technology Llc Magnetic recording medium with superparamagnetic underlayer
JP3434476B2 (ja) * 1999-09-29 2003-08-11 秋田県 高密度情報記録媒体及びその媒体の製造方法
JP4297585B2 (ja) * 2000-02-28 2009-07-15 株式会社日立グローバルストレージテクノロジーズ 磁気記録再生装置
SG91343A1 (en) * 2000-07-19 2002-09-17 Toshiba Kk Perpendicular magnetic recording medium and magnetic recording apparatus
US6703099B2 (en) * 2000-07-27 2004-03-09 Seagate Technology Llc Perpendicular magnetic recording media with patterned soft magnetic underlayer
US6753072B1 (en) 2000-09-05 2004-06-22 Seagate Technology Llc Multilayer-based magnetic media with hard ferromagnetic, anti-ferromagnetic, and soft ferromagnetic layers
JP2002100030A (ja) * 2000-09-21 2002-04-05 Toshiba Corp 垂直磁気記録媒体
JP2003036531A (ja) * 2001-07-25 2003-02-07 Fuji Electric Co Ltd 垂直磁気記録媒体の製造方法
JP2003067909A (ja) * 2001-08-24 2003-03-07 Fuji Electric Co Ltd 垂直磁気記録媒体
JP2003123220A (ja) * 2001-10-18 2003-04-25 Fuji Electric Co Ltd 磁気記録媒体、その製造方法、および、磁気記録装置
SG108872A1 (en) * 2001-10-24 2005-02-28 Toda Kogyo Corp Perpendicular magnetic recording medium
US6890667B1 (en) * 2001-11-09 2005-05-10 Maxtor Corporation Soft underlayer structure for magnetic recording
SG120091A1 (en) * 2002-04-17 2006-03-28 Fuji Electric Co Ltd Perpendicular magnetic recording medium and the method of manufacturing the same
JP3961887B2 (ja) * 2002-06-10 2007-08-22 富士通株式会社 垂直磁気記録媒体の製造方法
JP2004140801A (ja) * 2002-09-24 2004-05-13 Ricoh Co Ltd 画像形成装置、集約印刷方法
KR100464318B1 (ko) * 2002-10-01 2005-01-03 삼성전자주식회사 자기기록매체
DE60224733T2 (de) * 2002-10-17 2009-01-15 Fujitsu Ltd., Kawasaki Vertikal-magnetaufzeichnungsmedium
CN1292406C (zh) * 2002-12-26 2006-12-27 富士通株式会社 垂直磁记录媒体
US8323808B2 (en) 2004-01-09 2012-12-04 Fuji Electric Co., Ltd. Perpendicular magnetic recording medium
KR100624418B1 (ko) * 2004-02-25 2006-09-18 삼성전자주식회사 수직자기기록매체 및 그 제조방법
US20070217067A1 (en) * 2004-03-26 2007-09-20 Kabushiki Kaisha Toshiba And Showa Denko K.K. Perpendicular Magnetic Recording Medium Using Soft Magnetic Layer Which Suppresses Noise Generation, And Perpendicular Magnetic Recording Apparatus Therewith
JP2005353256A (ja) 2004-05-13 2005-12-22 Fujitsu Ltd 垂直磁気記録媒体およびその製造方法、磁気記憶装置
JP4254643B2 (ja) * 2004-07-23 2009-04-15 株式会社日立製作所 垂直磁気記録媒体および磁気記憶装置
US20060042938A1 (en) * 2004-09-01 2006-03-02 Heraeus, Inc. Sputter target material for improved magnetic layer
US20060286414A1 (en) * 2005-06-15 2006-12-21 Heraeus, Inc. Enhanced oxide-containing sputter target alloy compositions
US20070253103A1 (en) * 2006-04-27 2007-11-01 Heraeus, Inc. Soft magnetic underlayer in magnetic media and soft magnetic alloy based sputter target
JP2008226416A (ja) * 2007-03-16 2008-09-25 Fuji Electric Device Technology Co Ltd 垂直磁気記録媒体とその製造方法
JP6210503B2 (ja) * 2012-08-13 2017-10-11 山陽特殊製鋼株式会社 磁気記録用軟磁性用合金およびスパッタリングターゲット材
WO2014058291A1 (en) 2012-10-08 2014-04-17 Fuji Electric (Malaysia) Sdn Bhd Perpendicular magnetic recording medium

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891B2 (ja) * 1977-09-30 1983-01-05 俊一 岩崎 磁気記録媒体
JPS57117122A (en) * 1981-01-08 1982-07-21 Toshiba Corp Magnetic recording body
JPS5841428A (ja) * 1981-09-04 1983-03-10 Fujitsu Ltd 垂直磁化記録媒体
JPS58141433A (ja) * 1982-02-16 1983-08-22 Teijin Ltd 磁気記録媒体とその製造方法
JPS5933628A (ja) * 1982-08-17 1984-02-23 Matsushita Electric Ind Co Ltd 垂直磁気記録媒体の製造方法
JPS59127235A (ja) * 1983-01-11 1984-07-23 Fuji Xerox Co Ltd 垂直磁気記録媒体
JPS59191130A (ja) * 1983-04-14 1984-10-30 Toray Ind Inc 磁気記録媒体用基材および磁気記録媒体
JPS60172162A (ja) * 1984-02-15 1985-09-05 松下電子工業株式会社 管状電球
JPS60203222A (ja) * 1984-03-29 1985-10-14 松下電器産業株式会社 電気掃除機
JPS60221829A (ja) * 1984-04-19 1985-11-06 Nec Corp デ−タ処理装置
JPS60239916A (ja) * 1984-05-11 1985-11-28 Fujitsu Ltd 垂直磁気記録媒体
JPS618719A (ja) * 1984-06-20 1986-01-16 Matsushita Electric Ind Co Ltd 磁気記録媒体
JPS6199932A (ja) * 1984-10-19 1986-05-19 Sony Corp 垂直磁気記録媒体の製造方法
KR890004257B1 (ko) * 1984-10-29 1989-10-28 니뽕 빅터 가부시끼가이샤 자기 기록매체 및 그 제조법
JPS61204814A (ja) * 1985-03-07 1986-09-10 Nec Kansai Ltd 磁気ヘツドの巻線方法
JPS61239916A (ja) * 1985-04-16 1986-10-25 Mitsubishi Plastics Ind Ltd 発泡射出成形方法
JPH0630136B2 (ja) * 1985-12-19 1994-04-20 帝人株式会社 垂直磁気記録媒体

Also Published As

Publication number Publication date
KR890005661A (ko) 1989-05-16
JP2524514B2 (ja) 1996-08-14
US5543221A (en) 1996-08-06
DE3850833T2 (de) 1994-11-17
EP0309202A3 (en) 1990-07-18
EP0309202A2 (de) 1989-03-29
EP0309202B1 (de) 1994-07-27
JPH01158618A (ja) 1989-06-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee