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DE69029720D1 - Medium für magnetische aufzeichnungen - Google Patents

Medium für magnetische aufzeichnungen

Info

Publication number
DE69029720D1
DE69029720D1 DE69029720T DE69029720T DE69029720D1 DE 69029720 D1 DE69029720 D1 DE 69029720D1 DE 69029720 T DE69029720 T DE 69029720T DE 69029720 T DE69029720 T DE 69029720T DE 69029720 D1 DE69029720 D1 DE 69029720D1
Authority
DE
Germany
Prior art keywords
medium
magnetic recording
recording
magnetic
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
DE69029720T
Other languages
English (en)
Other versions
DE69029720T2 (de
Inventor
Kiminori Tdk Corporation Tamai
Shigeo Tdk Corporation Kurose
Kiyotaka Tdk Corporati Okuyama
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.)
TDK Corp
Original Assignee
TDK Corp
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 JP16335390A external-priority patent/JP3178828B2/ja
Priority claimed from JP2163354A external-priority patent/JPH03136214A/ja
Application filed by TDK Corp filed Critical TDK Corp
Publication of DE69029720D1 publication Critical patent/DE69029720D1/de
Application granted granted Critical
Publication of DE69029720T2 publication Critical patent/DE69029720T2/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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the magnetic particles
    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70605—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys
    • G11B5/70615—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material metals or alloys containing Fe metal or alloys
    • 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
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/712—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the surface treatment or coating of magnetic particles
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
    • Y10T428/2991—Coated

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
DE69029720T 1989-07-21 1990-07-13 Medium für magnetische aufzeichnungen Expired - Fee Related DE69029720T2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP18928189 1989-07-21
JP19608389 1989-07-28
JP16335390A JP3178828B2 (ja) 1989-07-21 1990-06-21 磁気記録媒体の製造方法
JP2163354A JPH03136214A (ja) 1989-07-28 1990-06-21 磁気記録媒体
PCT/JP1990/000908 WO1991001548A1 (en) 1989-07-21 1990-07-13 Magnetic recording medium

Publications (2)

Publication Number Publication Date
DE69029720D1 true DE69029720D1 (de) 1997-02-27
DE69029720T2 DE69029720T2 (de) 1997-08-14

Family

ID=27473862

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69029720T Expired - Fee Related DE69029720T2 (de) 1989-07-21 1990-07-13 Medium für magnetische aufzeichnungen

Country Status (4)

Country Link
US (1) US5225281A (de)
EP (1) EP0436041B1 (de)
DE (1) DE69029720T2 (de)
WO (1) WO1991001548A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0581644A (ja) * 1991-09-24 1993-04-02 Tdk Corp 磁気記録媒体
JPH05266462A (ja) * 1991-11-25 1993-10-15 Tdk Corp 磁気記録媒体
ES2072802B1 (es) * 1992-09-18 1996-02-01 Espanola Prod Quimicos Procedimiento para la preparacion de la 7-isopropoxiisoflavona.
DE69406163T2 (de) * 1993-03-08 1998-03-05 Ishihara Sangyo Kaisha Verfahren zur Herstellung von magnetischen metallischen Teilchen
JPH07272913A (ja) * 1994-03-30 1995-10-20 Kawasaki Teitoku Kk 永久磁石原料、その製造法及び永久磁石
DE19806167A1 (de) * 1998-02-14 1999-08-19 Studiengesellschaft Kohle Mbh Edelmetall-geschützte, antikorrosive magnetische Nanokolloide
EP1548760A3 (de) * 2003-11-27 2007-12-26 DOWA Electronics Materials Co., Ltd. Magnetisches Eisennitridpulver und zugehöriges Herstellungsverfahren
US7285329B2 (en) * 2004-02-18 2007-10-23 Hitachi Metals, Ltd. Fine composite metal particles and their production method, micro-bodies, and magnetic beads
JP3740491B1 (ja) * 2004-07-23 2006-02-01 三井金属鉱業株式会社 亜鉛電解製錬における電解液中のフッ素を吸着かつ脱離できるフッ素吸脱剤、及び、当該フッ素吸脱剤を用いたフッ素除去方法
US9067833B2 (en) 2012-06-21 2015-06-30 Toyota Motor Engineering & Manufacturing North America, Inc. Iron oxide and silica magnetic core

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52122213A (en) * 1976-04-05 1977-10-14 Hitachi Ltd Production of ferromagnetic metal powder
JPS52153198A (en) * 1976-06-14 1977-12-20 Toda Kogyo Corp Method of manufacturing needleetype crystall iron magneticcparticle powder
JPS6030734B2 (ja) * 1979-04-11 1985-07-18 健 増本 鉄族元素とジルコニウムを含む脆性が小さく熱的安定性に優れる非晶質合金
EP0041257B1 (de) * 1980-05-30 1984-11-14 Hitachi Maxell Ltd. Verfahren zur Herstellung ferromagnetischer Teilchen aus metallischem Eisen
EP0041727B1 (de) * 1980-06-11 1987-09-09 Hitachi Maxell Ltd. Verfahren zur Herstellung von im wesentlichen aus metallischem Eisen bestehenden ferromagnetischen Teilchen
JPS5860506A (ja) * 1981-10-07 1983-04-11 Ishihara Sangyo Kaisha Ltd 改善された分散性を有する磁気記録材料用磁性粉末
JPS59159904A (ja) * 1983-03-01 1984-09-10 Sumitomo Alum Smelt Co Ltd 金属磁性粉末とその製造方法
JPS59162205A (ja) * 1983-03-04 1984-09-13 Sumitomo Alum Smelt Co Ltd 金属磁性粉末とその製造法
JPS62156209A (ja) * 1985-12-27 1987-07-11 Mitsui Toatsu Chem Inc 強磁性金属粉末
US4772522A (en) * 1986-07-21 1988-09-20 Tdk Corporation Magnetic recording medium
JP2592809B2 (ja) * 1986-09-26 1997-03-19 キヤノン株式会社 光起電力素子の製造方法
JPS63306526A (ja) * 1987-06-06 1988-12-14 Taiyo Yuden Co Ltd 磁気記録媒体及びその製造方法
JPS6450233A (en) * 1987-08-20 1989-02-27 Hitachi Maxell Durable magnetic powder and magnetic recording medium using said powder
JPS6457701A (en) * 1987-08-28 1989-03-06 Ishihara Mining & Chemical Co Manufacture of metallic magnetic powder for magnetic recording
DE3826770A1 (de) * 1988-08-06 1990-02-08 Bayer Ag Nadelfoermige legierungspulver auf eisenbasis, verfahren zu ihrer herstellung sowie deren verwendung

Also Published As

Publication number Publication date
EP0436041A1 (de) 1991-07-10
US5225281A (en) 1993-07-06
EP0436041B1 (de) 1997-01-15
EP0436041A4 (en) 1992-05-20
WO1991001548A1 (en) 1991-02-07
DE69029720T2 (de) 1997-08-14

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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