DE60314383D1 - Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps - Google Patents

Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps

Info

Publication number
DE60314383D1
DE60314383D1 DE60314383T DE60314383T DE60314383D1 DE 60314383 D1 DE60314383 D1 DE 60314383D1 DE 60314383 T DE60314383 T DE 60314383T DE 60314383 T DE60314383 T DE 60314383T DE 60314383 D1 DE60314383 D1 DE 60314383D1
Authority
DE
Germany
Prior art keywords
tagming
powder
magnetic
medium
layer
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
DE60314383T
Other languages
English (en)
Other versions
DE60314383T2 (de
Inventor
Kazuyuki Matsumoto
Kenichi Inoue
Ken Inoue
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.)
Dowa Holdings Co Ltd
Original Assignee
Dowa Mining 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 Dowa Mining Co Ltd filed Critical Dowa Mining Co Ltd
Application granted granted Critical
Publication of DE60314383D1 publication Critical patent/DE60314383D1/de
Publication of DE60314383T2 publication Critical patent/DE60314383T2/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
    • G11B5/73—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
    • 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.]
DE60314383T 2002-04-03 2003-04-02 Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps Expired - Lifetime DE60314383T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002101444 2002-04-03
JP2002101444 2002-04-03
PCT/JP2003/004214 WO2003088218A1 (fr) 2002-04-03 2003-04-02 Poudre pour sous-couche de support d'enregistrement magnetique de type enrobage

Publications (2)

Publication Number Publication Date
DE60314383D1 true DE60314383D1 (de) 2007-07-26
DE60314383T2 DE60314383T2 (de) 2008-02-21

Family

ID=29241815

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60314383T Expired - Lifetime DE60314383T2 (de) 2002-04-03 2003-04-02 Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps

Country Status (5)

Country Link
US (1) US7238438B2 (de)
EP (1) EP1492088B1 (de)
CN (1) CN100356452C (de)
DE (1) DE60314383T2 (de)
WO (1) WO2003088218A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4296350B2 (ja) * 2004-08-23 2009-07-15 Ｄｏｗａエレクトロニクス株式会社 磁気記録媒体用非磁性粉末およびその製造方法ならびにこれを用いた磁気記録媒体
US7641990B2 (en) * 2005-06-27 2010-01-05 Dowa Electronics Materials Co., Ltd. Iron compound particles and magnetic recording medium using same
US7703942B2 (en) * 2006-08-31 2010-04-27 Rensselaer Polytechnic Institute High-efficient light engines using light emitting diodes
WO2008029935A1 (en) * 2006-09-05 2008-03-13 Showa Denko K.K. Organic electroluminescence element and use thereof
US8682502B2 (en) * 2007-03-28 2014-03-25 Irobot Corporation Remote vehicle control system and method
JP4389955B2 (ja) * 2007-03-30 2009-12-24 Ｔｄｋ株式会社 磁気記録媒体及びその製造方法

Family Cites Families (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0693297B2 (ja) 1987-01-30 1994-11-16 富士写真フイルム株式会社 磁気記録媒体
US5069983A (en) * 1988-12-06 1991-12-03 Nihon Shinku Gijutsu Kabushiki Kaisha Magnetic recording member
EP0377933B1 (de) * 1988-12-29 1995-07-19 Toda Kogyo Corp. Magnetische Eisenoxydteilchen und Verfahren zu ihrer Herstellung
DE3912976A1 (de) * 1989-04-20 1990-10-25 Basf Ag Nadelfoermige, kobaltmodifizierte eisenoxide und verfahren zu ihrer herstellung
JPH04167225A (ja) 1990-10-31 1992-06-15 Victor Co Of Japan Ltd 磁気記録媒体
JPH0560362A (ja) * 1991-09-02 1993-03-09 Mitsubishi Heavy Ind Ltd 空気調和機の制御方法
JP2872227B2 (ja) * 1992-08-07 1999-03-17 戸田工業株式会社 磁気記録媒体用下地層
JP3396821B2 (ja) 1992-10-13 2003-04-14 コニカ株式会社 磁気記録媒体
JP2946262B2 (ja) 1992-10-22 1999-09-06 富士写真フイルム株式会社 磁気記録媒体
JP2924941B2 (ja) 1993-12-27 1999-07-26 戸田工業株式会社 磁気記録媒体用下地層
JPH08138241A (ja) * 1994-11-04 1996-05-31 Tdk Corp 磁気記録媒体の製造方法
JPH0922524A (ja) * 1995-07-06 1997-01-21 Fuji Photo Film Co Ltd 磁気記録媒体
JP3509837B2 (ja) 1995-10-20 2004-03-22 戸田工業株式会社 鉄を主成分とする金属磁性粒子粉末を使用している磁気記録媒体の非磁性下地層用ヘマタイト粒子粉末、該ヘマタイト粒子粉末を用いた磁気記録媒体の非磁性下地層、該非磁性下地層を用いた磁気記録媒体並びに該ヘマタイト粒子粉末の製造法
JP3838693B2 (ja) * 1996-03-21 2006-10-25 同和鉱業株式会社 塗布型磁気記録媒体の下地層用粉末
JP4139873B2 (ja) * 1996-08-05 2008-08-27 Ｄｏｗａエレクトロニクス株式会社 塗布型磁気記録媒体の下層用粉末
JPH1069629A (ja) * 1996-08-27 1998-03-10 Dowa Mining Co Ltd 重層構造の塗布型磁気記録媒体
JP3903139B2 (ja) * 1997-06-05 2007-04-11 Ｄｏｗａエレクトロニクス株式会社 塗布型磁気記録媒体の下層用粉末
JP3832539B2 (ja) * 1998-01-12 2006-10-11 戸田工業株式会社 磁気記録媒体
JPH11273056A (ja) * 1998-03-25 1999-10-08 Tdk Corp 磁気記録媒体及びその製造方法
JPH11353637A (ja) * 1998-04-10 1999-12-24 Toda Kogyo Corp 非磁性下地層用針状ヘマタイト粒子粉末及び該針状ヘマタイト粒子粉末を用いた非磁性下地層を有する磁気記録媒体
JP3427883B2 (ja) * 1998-11-04 2003-07-22 戸田工業株式会社 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体
US6506264B1 (en) * 1998-12-18 2003-01-14 Dowa Mining Co., Ltd. Ferromagnetic powder
WO2000038181A1 (fr) 1998-12-18 2000-06-29 Dowa Mining Co., Ltd. Poudre de sous-couche pour support d'enregistrement magnetique de type revetement et procede de production
JP4732556B2 (ja) * 1999-01-29 2011-07-27 戸田工業株式会社 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体
JP4305589B2 (ja) * 1999-05-24 2009-07-29 戸田工業株式会社 磁気記録媒体の非磁性下地層用非磁性粒子粉末及びその製造法並びに磁気記録媒体
US6475598B1 (en) * 1999-06-24 2002-11-05 Fuji Photo Film Co., Ltd. Magnetic recording medium
JP4474557B2 (ja) * 1999-12-15 2010-06-09 Ｄｏｗａエレクトロニクス株式会社 塗布型磁気記録媒体の下層用粉末の製造法
JP2001297428A (ja) * 2000-02-10 2001-10-26 Tdk Corp 磁気記録媒体およびその製造方法
JP2001243619A (ja) * 2000-02-28 2001-09-07 Fuji Photo Film Co Ltd 磁気記録媒体
JP2001344738A (ja) * 2000-05-26 2001-12-14 Fuji Photo Film Co Ltd 磁気記録媒体
US6534168B2 (en) * 2000-08-25 2003-03-18 Fuji Photo Film Co., Ltd. Magnetic recording medium comprising a lower layer containing specific flat acicular α-iron oxide powder
JP2002074646A (ja) * 2000-08-29 2002-03-15 Fuji Photo Film Co Ltd 磁気記録媒体
EP1492089B1 (de) * 2002-04-03 2007-06-06 Dowa Mining Co., Ltd. Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit

Also Published As

Publication number Publication date
EP1492088A1 (de) 2004-12-29
DE60314383T2 (de) 2008-02-21
US7238438B2 (en) 2007-07-03
WO2003088218A1 (fr) 2003-10-23
EP1492088B1 (de) 2007-06-13
CN1643578A (zh) 2005-07-20
CN100356452C (zh) 2007-12-19
EP1492088A4 (de) 2005-04-13
US20050129945A1 (en) 2005-06-16

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Legal Events

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