DE69607717D1 - Magnetischer Aufzeichnungsträger - Google Patents

Magnetischer Aufzeichnungsträger

Info

Publication number
DE69607717D1
DE69607717D1 DE69607717T DE69607717T DE69607717D1 DE 69607717 D1 DE69607717 D1 DE 69607717D1 DE 69607717 T DE69607717 T DE 69607717T DE 69607717 T DE69607717 T DE 69607717T DE 69607717 D1 DE69607717 D1 DE 69607717D1
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 - Lifetime
Application number
DE69607717T
Other languages
English (en)
Other versions
DE69607717T2 (de
Inventor
Kouichi Masaki
Toshihiko Miura
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.)
Fujifilm Corp
Original Assignee
Fuji Photo Film Co 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of DE69607717D1 publication Critical patent/DE69607717D1/de
Application granted granted Critical
Publication of DE69607717T2 publication Critical patent/DE69607717T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B5/73—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
    • G11B5/733—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 characterised by the addition of non-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
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/256—Heavy metal or aluminum or compound thereof
DE69607717T 1995-10-13 1996-10-10 Magnetischer Aufzeichnungsträger Expired - Lifetime DE69607717T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26567395A JP3473877B2 (ja) 1995-10-13 1995-10-13 磁気記録媒体

Publications (2)

Publication Number Publication Date
DE69607717D1 true DE69607717D1 (de) 2000-05-18
DE69607717T2 DE69607717T2 (de) 2000-08-03

Family

ID=17420411

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69607717T Expired - Lifetime DE69607717T2 (de) 1995-10-13 1996-10-10 Magnetischer Aufzeichnungsträger

Country Status (4)

Country Link
US (1) US5770302A (de)
EP (1) EP0768644B1 (de)
JP (1) JP3473877B2 (de)
DE (1) DE69607717T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69737438D1 (de) * 1996-12-27 2007-04-19 Tdk Corp Magnetisches Aufzeichnungsmedium
KR20010029493A (ko) 1997-02-10 2001-04-06 무네유키 가코우 자기기록매체
JPH10275325A (ja) * 1997-03-28 1998-10-13 Fuji Photo Film Co Ltd ディスク状磁気記録媒体
JP3922664B2 (ja) * 1997-05-21 2007-05-30 富士フイルム株式会社 磁気記録媒体
EP0889464B1 (de) 1997-06-30 2003-09-03 Fuji Photo Film Co., Ltd. Magnetisches Aufzeichnungsmedium
US6096406A (en) * 1997-07-15 2000-08-01 Fuji Photo Film Co., Ltd. Magnetic recording medium
US6391450B1 (en) 1999-05-20 2002-05-21 Toda Kogyo Corporation Spindle-shaped goethite particles, spindle-shaped hematite particles, spindle-shaped magnetic iron-based alloy particles, and process for producing the same
JP2001176054A (ja) 1999-12-17 2001-06-29 Fuji Photo Film Co Ltd 強磁性金属粉末及びこれを用いた磁気記録媒体
JP2002260211A (ja) * 2001-02-28 2002-09-13 Fuji Photo Film Co Ltd 磁気記録媒体
JP4496452B2 (ja) † 2001-03-30 2010-07-07 Ｄｉｃ株式会社 磁気記録媒体
JP3866074B2 (ja) * 2001-10-12 2007-01-10 富士フイルムホールディングス株式会社 強磁性金属粉末及びその製造方法並びに磁気記録媒体
JP4677734B2 (ja) * 2004-04-19 2011-04-27 Ｄｏｗａエレクトロニクス株式会社 磁気記録媒体用磁性粉末
JP4625983B2 (ja) * 2007-03-15 2011-02-02 Ｄｏｗａエレクトロニクス株式会社 磁気記録媒体用の強磁性鉄合金粉末
JP2007194666A (ja) * 2007-04-09 2007-08-02 Dowa Holdings Co Ltd 強磁性金属粉末製造用の先駆物質
WO2010016154A1 (ja) * 2008-08-05 2010-02-11 Ｄｏｗａエレクトロニクス株式会社 磁気記録用金属磁性粉およびその製造法
JP4839459B2 (ja) * 2010-06-17 2011-12-21 Ｄｏｗａエレクトロニクス株式会社 磁気記録媒体用の強磁性鉄合金粉末

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5366795A (en) * 1992-10-21 1994-11-22 Konica Corporation Magnetic recording medium having three layers each containing particles and a binder wherein the relationship of particle crystal size in the second and third layers is specified
JP2849514B2 (ja) * 1992-10-29 1999-01-20 富士写真フイルム株式会社 磁気記録媒体
US5591535A (en) * 1993-07-01 1997-01-07 Dowa Mining Co., Ltd. Ferromagnetic metal powder
JP3439532B2 (ja) * 1994-05-31 2003-08-25 富士写真フイルム株式会社 磁気記録媒体
US5645652A (en) * 1994-12-13 1997-07-08 Toda Kogyo Corporation Spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients and process for producing the same

Also Published As

Publication number Publication date
EP0768644B1 (de) 2000-04-12
DE69607717T2 (de) 2000-08-03
JP3473877B2 (ja) 2003-12-08
EP0768644A1 (de) 1997-04-16
US5770302A (en) 1998-06-23
JPH09106535A (ja) 1997-04-22

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8327 Change in the person/name/address of the patent owner

Owner name: FUJIFILM CORP., TOKIO/TOKYO, JP