DE69620704T2 - Hematitteilchen für nicht-magnetische Unterschicht eines magnetischen Aufzeichnungsträger, Herstellungsverfahren, nicht-magnetische Unterschicht, magnetisches Aufzeignungsmedium - Google Patents

Hematitteilchen für nicht-magnetische Unterschicht eines magnetischen Aufzeichnungsträger, Herstellungsverfahren, nicht-magnetische Unterschicht, magnetisches Aufzeignungsmedium

Info

Publication number
DE69620704T2
DE69620704T2 DE69620704T DE69620704T DE69620704T2 DE 69620704 T2 DE69620704 T2 DE 69620704T2 DE 69620704 T DE69620704 T DE 69620704T DE 69620704 T DE69620704 T DE 69620704T DE 69620704 T2 DE69620704 T2 DE 69620704T2
Authority
DE
Germany
Prior art keywords
magnetic
recording medium
magnetic recording
underlayer
manufacturing
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
DE69620704T
Other languages
English (en)
Other versions
DE69620704D1 (de
Inventor
Kazuyuki Hayashi
Keisuke Iwasaki
Yasuyuki Tanaka
Hiroko Morii
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.)
Toda Kogyo Corp
Original Assignee
Toda Kogyo 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 Toda Kogyo Corp filed Critical Toda Kogyo Corp
Application granted granted Critical
Publication of DE69620704D1 publication Critical patent/DE69620704D1/de
Publication of DE69620704T2 publication Critical patent/DE69620704T2/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
    • 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
    • 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
    • Y10T428/256—Heavy metal or aluminum or compound thereof
    • 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
    • Y10T428/257—Iron oxide or aluminum oxide
    • 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
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • 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.]
    • 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
DE69620704T 1995-10-20 1996-10-18 Hematitteilchen für nicht-magnetische Unterschicht eines magnetischen Aufzeichnungsträger, Herstellungsverfahren, nicht-magnetische Unterschicht, magnetisches Aufzeignungsmedium Expired - Lifetime DE69620704T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29785295 1995-10-20

Publications (2)

Publication Number Publication Date
DE69620704D1 DE69620704D1 (de) 2002-05-23
DE69620704T2 true DE69620704T2 (de) 2002-10-17

Family

ID=17851992

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69620704T Expired - Lifetime DE69620704T2 (de) 1995-10-20 1996-10-18 Hematitteilchen für nicht-magnetische Unterschicht eines magnetischen Aufzeichnungsträger, Herstellungsverfahren, nicht-magnetische Unterschicht, magnetisches Aufzeignungsmedium

Country Status (4)

Country Link
US (1) US5750250A (de)
EP (1) EP0769775B1 (de)
KR (1) KR970023005A (de)
DE (1) DE69620704T2 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3087825B2 (ja) * 1996-04-26 2000-09-11 戸田工業株式会社 紡錘状ゲータイト粒子粉末及びその製造法並びに該ゲータイト粒子粉末を出発原料として得られる鉄を主成分とする紡錘状金属磁性粒子粉末及びその製造法
US6087004A (en) * 1996-08-19 2000-07-11 Toda Kogyo Corporation Non-magnetic black particles, non-magnetic black pigment therefrom and non-magnetic black filler therefrom
JP3509838B2 (ja) * 1996-12-16 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酸化チタン粒子粉末、該酸化チタン粒子粉末を用いた非磁性下地層を有する磁気記録媒体の基体並びに該基体を用いた磁気記録媒体
US6120898A (en) * 1997-01-08 2000-09-19 Toda Kogyo Corporation Hematite particles and magnetic recording medium using hematite particles as non-magnetic particles for a non-magnetic undercoat layer
WO1998035345A1 (fr) 1997-02-10 1998-08-13 Fuji Photo Film Co., Ltd. Support d'enregistrement magnetique
JPH10241148A (ja) * 1997-02-28 1998-09-11 Toda Kogyo Corp 磁気記録媒体
JP3514068B2 (ja) * 1997-03-27 2004-03-31 戸田工業株式会社 磁気記録媒体の非磁性下地層用ヘマタイト粒子粉末及びその製造法、磁気記録媒体の非磁性下地層及び磁気記録媒体
DE69817697T2 (de) 1997-06-30 2004-07-08 Fuji Photo Film Co. Ltd., Minamiashigara Magnetisches Aufzeichnungsmedium
US6063490A (en) * 1997-08-19 2000-05-16 Toda Kogyo Corporation Magnetic recording medium comprising non-magnetic acicular particles containing mainly iron and having titanium dispersed therein
US6124022A (en) * 1997-11-26 2000-09-26 Toda Kogyo Corporation Acicular hematite particles for non-magnetic undercoat layer of magnetic recording medium, and magnetic recording medium using the same
US6159592A (en) * 1997-11-28 2000-12-12 Toda Kogyo Corporation Magnetic recording medium
US6287668B1 (en) 1997-12-12 2001-09-11 Toda Kogyo Corporation Magnetic recording medium and substrate therefor
US6803104B2 (en) * 1997-12-12 2004-10-12 Toda Kogyo Corporation Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles
DE69814319T2 (de) * 1997-12-12 2004-03-18 Toda Kogyo Corp. Magnetisches Aufzeichnungsmedium und Substrat dafür
US6352776B1 (en) * 1997-12-12 2002-03-05 Toda Kogyo Corporation Magnetic recording medium, non-magnetic acicular black iron-based composite particles and process for producing the particles
US6207253B1 (en) * 1997-12-26 2001-03-27 Toda Kogyo Corporation Acicular hematite particles and magnetic recording medium
US6153296A (en) * 1998-03-13 2000-11-28 Toda Kogyo Corporation Acicular hematite particles and magnetic recording medium
EP0997500B1 (de) * 1998-09-25 2004-04-21 Toda Kogyo Corporation Feine rote Eisenoxidpigmente und diese enthaltende Farb- oder Harzzusammensetzungen
JP2000123354A (ja) * 1998-10-20 2000-04-28 Toda Kogyo Corp 磁気記録媒体の非磁性下地層用粒子粉末及びその製造法並びに磁気記録媒体
JP2004086944A (ja) * 2002-08-23 2004-03-18 Kanto Denka Kogyo Co Ltd 重層構造を有する塗布型磁気記録媒体の下地層形成用酸化鉄粉末及びその製造法
JP4787958B2 (ja) * 2003-07-04 2011-10-05 Ｄｏｗａエレクトロニクス株式会社 塗布型重層磁気記録媒体の下層用粉末並びにそれを用いた磁気記録媒体
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 (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0816978B2 (ja) 1986-01-06 1996-02-21 日立マクセル株式会社 磁気ディスク
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
JPH04167225A (ja) 1990-10-31 1992-06-15 Victor Co Of Japan Ltd 磁気記録媒体
JP2623178B2 (ja) 1991-04-25 1997-06-25 富士写真フイルム株式会社 磁気記録媒体
JPH0573882A (ja) 1991-09-18 1993-03-26 Matsushita Electric Ind Co Ltd 磁気記録媒体
EP0552611B2 (de) * 1992-01-08 2003-05-07 Fuji Photo Film Co., Ltd. Magnetischer Aufzeichnungsträger
JP2566088B2 (ja) 1992-01-08 1996-12-25 富士写真フイルム株式会社 磁気記録媒体
JPH05347017A (ja) 1992-04-14 1993-12-27 Konica Corp 磁気記録媒体
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
JPH0693297A (ja) 1992-09-11 1994-04-05 Nisshin Iryoki Kk 石鹸の簡易製造法
US5496622A (en) * 1993-07-26 1996-03-05 Konica Corporation Magnetic recording medium comprising an underlayer containing α-iron oxide powder and a magnetic layer containing ferromagnetic metallic powder
EP0969451A1 (de) * 1993-12-27 2000-01-05 Toda Kogyo Corporation Nichtmagnetische Unterschicht für magnetisches Aufzeichnungsmedium, magnetisches Aufzeichnungsmedium und nichtmagnetische Teilchen

Also Published As

Publication number Publication date
EP0769775A1 (de) 1997-04-23
US5750250A (en) 1998-05-12
KR970023005A (ko) 1997-05-30
DE69620704D1 (de) 2002-05-23
EP0769775B1 (de) 2002-04-17

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