DE60314242D1 - Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit - Google Patents

Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit

Info

Publication number
DE60314242D1
DE60314242D1 DE60314242T DE60314242T DE60314242D1 DE 60314242 D1 DE60314242 D1 DE 60314242D1 DE 60314242 T DE60314242 T DE 60314242T DE 60314242 T DE60314242 T DE 60314242T DE 60314242 D1 DE60314242 D1 DE 60314242D1
Authority
DE
Germany
Prior art keywords
magnetic
tagming
powder
layer
medium
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
DE60314242T
Other languages
English (en)
Other versions
DE60314242T2 (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
Publication of DE60314242D1 publication Critical patent/DE60314242D1/de
Application granted granted Critical
Publication of DE60314242T2 publication Critical patent/DE60314242T2/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.]
DE60314242T 2002-04-03 2003-04-02 Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit Expired - Lifetime DE60314242T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002100797 2002-04-03
JP2002100797 2002-04-03
PCT/JP2003/004215 WO2003088219A1 (fr) 2002-04-03 2003-04-02 Poudre pour sous-couche de support d'enregistrement magnetique de type a revetement et support d'enregistrement magnetique contenant ladite poudre

Publications (2)

Publication Number Publication Date
DE60314242D1 true DE60314242D1 (de) 2007-07-19
DE60314242T2 DE60314242T2 (de) 2008-02-07

Family

ID=29241495

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60314242T Expired - Lifetime DE60314242T2 (de) 2002-04-03 2003-04-02 Pulver für die unterschicht eines magnetaufzeichnungsmediums des beschichtungstyps und magnetisches aufzeichnungsmedium damit

Country Status (5)

Country Link
US (1) US7357997B2 (de)
EP (1) EP1492089B1 (de)
CN (1) CN100359568C (de)
DE (1) DE60314242T2 (de)
WO (1) WO2003088219A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7238438B2 (en) * 2002-04-03 2007-07-03 Dowa Mining Co., Ltd. Powder for underlayer of coating-type magnetic recording medium
US7425378B2 (en) * 2004-07-26 2008-09-16 Tdk Corporation Magnetic recording medium

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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
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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
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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
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US7844489B2 (en) * 2000-10-30 2010-11-30 Buyerleverage Buyer-driven targeting of purchasing entities
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Also Published As

Publication number Publication date
US7357997B2 (en) 2008-04-15
EP1492089B1 (de) 2007-06-06
CN1643577A (zh) 2005-07-20
DE60314242T2 (de) 2008-02-07
EP1492089A1 (de) 2004-12-29
US20050158586A1 (en) 2005-07-21
EP1492089A4 (de) 2005-04-13
WO2003088219A1 (fr) 2003-10-23
CN100359568C (zh) 2008-01-02

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