DE69426756D1 - Nichtmagnetische Unterschicht für magnetischer Aufzeichnungsmedium, magnetisches Aufzeichnungsmedium und nichtmagnetische Teilchen - Google Patents

Nichtmagnetische Unterschicht für magnetischer Aufzeichnungsmedium, magnetisches Aufzeichnungsmedium und nichtmagnetische Teilchen

Info

Publication number
DE69426756D1
DE69426756D1 DE69426756T DE69426756T DE69426756D1 DE 69426756 D1 DE69426756 D1 DE 69426756D1 DE 69426756 T DE69426756 T DE 69426756T DE 69426756 T DE69426756 T DE 69426756T DE 69426756 D1 DE69426756 D1 DE 69426756D1
Authority
DE
Germany
Prior art keywords
magnetic
recording medium
magnetic recording
underlayer
particles
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
DE69426756T
Other languages
English (en)
Other versions
DE69426756T2 (de
Inventor
Kazuyuki Hiroshima-Shi Hayashi
Keisuke Iwasaki
Yasuyuki Tanaka
Minoru Ohsugi
Hiroko Morii
Mineko Sakoda
Norio Sugita
Masaaki Maekawa
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
Priority claimed from JP35355593A external-priority patent/JP2924941B2/ja
Priority claimed from JP35355693A external-priority patent/JP3436274B2/ja
Application filed by Toda Kogyo Corp filed Critical Toda Kogyo Corp
Application granted granted Critical
Publication of DE69426756D1 publication Critical patent/DE69426756D1/de
Publication of DE69426756T2 publication Critical patent/DE69426756T2/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
    • G11B5/73—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
    • 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
    • G11B5/7334—Base layer characterised by composition or structure
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/2438—Coated
    • 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
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
    • Y10T428/24372—Particulate matter
    • Y10T428/2438—Coated
    • Y10T428/24388—Silicon containing coating
    • 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.]
    • Y10T428/2991—Coated
    • 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
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, 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
    • Y10T428/2993—Silicic or refractory material containing [e.g., tungsten oxide, glass, cement, etc.]
    • Y10T428/2995—Silane, siloxane or silicone coating
DE69426756T 1993-12-27 1994-05-10 Nichtmagnetische Unterschicht für magnetischer Aufzeichnungsmedium, magnetisches Aufzeichnungsmedium und nichtmagnetische Teilchen Expired - Fee Related DE69426756T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP35355593A JP2924941B2 (ja) 1993-12-27 1993-12-27 磁気記録媒体用下地層
JP35355693A JP3436274B2 (ja) 1993-12-27 1993-12-27 磁気記録媒体用下地層

Publications (2)

Publication Number Publication Date
DE69426756D1 true DE69426756D1 (de) 2001-04-05
DE69426756T2 DE69426756T2 (de) 2001-06-21

Family

ID=26579872

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69426756T Expired - Fee Related DE69426756T2 (de) 1993-12-27 1994-05-10 Nichtmagnetische Unterschicht für magnetischer Aufzeichnungsmedium, magnetisches Aufzeichnungsmedium und nichtmagnetische Teilchen

Country Status (3)

Country Link
US (3) US5604015A (de)
EP (2) EP0969451A1 (de)
DE (1) DE69426756T2 (de)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5750250A (en) * 1995-10-20 1998-05-12 Toda Kogyo Corporation Hematite particles and magnetic recording medium having a non-magnetic under-coat layer containing hematite (Fe2 O3) particles.
JPH09259413A (ja) * 1996-03-21 1997-10-03 Fuji Photo Film Co Ltd 磁気記録装置用クリーニング媒体
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
EP0853066B1 (de) 1997-01-08 2000-10-04 Toda Kogyo Corp. Hematitteilchen und magnetischer Aufzeichnungsträger welcher die Hematitteilchen als nicht-magnitische Teilchen in einer nicht-magnetischen Unterschicht verwendet
US6312837B1 (en) * 1997-01-16 2001-11-06 Sony Corporation Optical element and method of manufacturing the same
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
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
US6287668B1 (en) 1997-12-12 2001-09-11 Toda Kogyo Corporation Magnetic recording medium and substrate therefor
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
EP0924690B1 (de) * 1997-12-12 2003-05-07 Toda Kogyo Corporation Magnetisches Aufzeichnungsmedium und Substrat dafür
EP1102246A1 (de) * 1999-11-15 2001-05-23 Toda Kogyo Corporation Schwarze nadelförmige magnetische Kompositteilchen und diese enthaltendes magnetisches Aufzeichnungsmedium
JP2004005789A (ja) * 2002-05-30 2004-01-08 Toray Ind Inc 磁気記録媒体用ポリエステルフィルム及び磁気記録テープ
JP5095909B2 (ja) * 2003-06-24 2012-12-12 ローム・アンド・ハース・エレクトロニック・マテリアルズ，エル．エル．シー． 触媒組成物および析出方法
US8728502B2 (en) * 2011-03-15 2014-05-20 Basf Corporation Black effect pigment

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5240847B2 (de) * 1972-10-05 1977-10-14
JPS5147923A (ja) * 1974-10-24 1976-04-24 Tone Industry Co Ltd Sankadainitetsuganryono kairyohoho
JPS5166320A (ja) * 1974-12-06 1976-06-08 Tone Industry Co Ltd Oshokusankatetsuganryono kairyohoho
JPS547292A (en) * 1977-06-20 1979-01-19 Toshiba Corp Parallel driver for a plural number of cryostats
JPH0623054B2 (ja) * 1985-11-30 1994-03-30 戸田工業株式会社 ヘマタイト粒子粉末の製造法
JPS62295217A (ja) * 1986-06-13 1987-12-22 Hitachi Maxell Ltd 磁気記録媒体
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
JPH03288324A (ja) * 1990-04-05 1991-12-18 Matsushita Electric Ind Co Ltd 磁気記録媒体
JP2621565B2 (ja) * 1990-04-11 1997-06-18 松下電器産業株式会社 磁気記録媒体
JPH0415172A (ja) * 1990-05-08 1992-01-20 Suzuki Motor Corp 電動式パワーステアリング装置
JPH0455979A (ja) * 1990-06-25 1992-02-24 Fukuoka Denki Keiki Kk データ入出力用グラフィック装置
JPH04167225A (ja) * 1990-10-31 1992-06-15 Victor Co Of Japan Ltd 磁気記録媒体
DE4105663A1 (de) * 1991-02-22 1992-09-03 Metri Airfluid Ag Einrichtung zum speisen eines elektrostatischen pulverbeschichtungsgeraets mit einem pulver-luft-strom
JPH05166320A (ja) * 1991-12-18 1993-07-02 Matsushita Electric Ind Co Ltd 浮動型磁気ヘッドのスライダ用材料及びそれを用いた浮動型磁気ヘッド
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
DE69331400T2 (de) * 1992-01-08 2002-08-08 Fuji Photo Film Co. Ltd., Minamiashigara Magnetischer Aufzeichnungsträger

Also Published As

Publication number Publication date
DE69426756T2 (de) 2001-06-21
EP0660309A1 (de) 1995-06-28
EP0660309B1 (de) 2001-02-28
US5830557A (en) 1998-11-03
US5882795A (en) 1999-03-16
EP0969451A1 (de) 2000-01-05
US5604015A (en) 1997-02-18

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee