DE69211242T2 - Magnetteilchen für magnetische aufzeichnung und magnetische aufzeichnungsträger daraus - Google Patents

Magnetteilchen für magnetische aufzeichnung und magnetische aufzeichnungsträger daraus

Info

Publication number
DE69211242T2
DE69211242T2 DE69211242T DE69211242T DE69211242T2 DE 69211242 T2 DE69211242 T2 DE 69211242T2 DE 69211242 T DE69211242 T DE 69211242T DE 69211242 T DE69211242 T DE 69211242T DE 69211242 T2 DE69211242 T2 DE 69211242T2
Authority
DE
Germany
Prior art keywords
magnetic
magnetic recording
carriers
particles
recording
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
DE69211242T
Other languages
English (en)
Other versions
DE69211242D1 (de
Inventor
Etsuji Ogawa
Osamu Kubo
Shunji Kurisu
Tatsumi Maeda
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.)
Toshiba Corp
Original Assignee
Toshiba 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
Application filed by Toshiba Corp filed Critical Toshiba Corp
Application granted granted Critical
Publication of DE69211242D1 publication Critical patent/DE69211242D1/de
Publication of DE69211242T2 publication Critical patent/DE69211242T2/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
    • G11B5/708—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 addition of non-magnetic particles to the 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
    • G11B5/68—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
    • G11B5/70626—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 containing non-metallic substances
    • G11B5/70631—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 containing non-metallic substances with a non-magnetic core
    • 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
    • G11B5/70626—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 containing non-metallic substances
    • G11B5/70642—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 containing non-metallic substances iron oxides
    • G11B5/70678—Ferrites
DE69211242T 1991-02-27 1992-02-27 Magnetteilchen für magnetische aufzeichnung und magnetische aufzeichnungsträger daraus Expired - Fee Related DE69211242T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP3116591 1991-02-27
JP4038267A JPH0582324A (ja) 1991-02-27 1992-02-26 磁気記録用磁性粉およびそれを用いた磁気記録媒体
PCT/JP1992/000212 WO1992015996A1 (en) 1991-02-27 1992-02-27 Magnetic powder for magnetic recording and magnetic recording medium made thereof

Publications (2)

Publication Number Publication Date
DE69211242D1 DE69211242D1 (de) 1996-07-11
DE69211242T2 true DE69211242T2 (de) 1996-12-05

Family

ID=26369617

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69211242T Expired - Fee Related DE69211242T2 (de) 1991-02-27 1992-02-27 Magnetteilchen für magnetische aufzeichnung und magnetische aufzeichnungsträger daraus

Country Status (5)

Country Link
EP (1) EP0526661B1 (de)
JP (1) JPH0582324A (de)
KR (1) KR960009122B1 (de)
DE (1) DE69211242T2 (de)
WO (1) WO1992015996A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0763509A4 (de) * 1995-03-30 1997-06-11 Nippon Oxygen Co Ltd Poröses kohlenstoffhaltiges material, verfahren zur herstellung desselben und verwendung davon
JPH10312937A (ja) * 1997-05-13 1998-11-24 Nippon Sanso Kk 電気二重層キャパシタ用炭素材の製造方法並びに炭素電極および電気二重層キャパシタ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2509558B2 (ja) * 1985-08-29 1996-06-19 株式会社東芝 高密度磁気記録用磁性粉およびそれを用いた磁気記録用媒体
JP2659940B2 (ja) * 1986-11-29 1997-09-30 株式会社 東芝 高密度磁気記録用磁性粉およびその製造方法
JPS63193507A (ja) * 1987-02-06 1988-08-10 Toshiba Corp 高密度磁気記録用磁性粉およびそれを用いた磁気記録用媒体
JP2706774B2 (ja) * 1988-01-29 1998-01-28 東芝硝子株式会社 置換型六方晶系フェライト磁性粉末の製造方法

Also Published As

Publication number Publication date
JPH0582324A (ja) 1993-04-02
EP0526661A1 (de) 1993-02-10
KR927004274A (ko) 1992-12-19
WO1992015996A1 (en) 1992-09-17
EP0526661B1 (de) 1996-06-05
KR960009122B1 (ko) 1996-07-13
DE69211242D1 (de) 1996-07-11
EP0526661A4 (en) 1993-08-11

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)
8339 Ceased/non-payment of the annual fee