DE3784085D1 - Magnetischer aufzeichnungstraeger. - Google Patents

Magnetischer aufzeichnungstraeger.

Info

Publication number
DE3784085D1
DE3784085D1 DE8787103989T DE3784085T DE3784085D1 DE 3784085 D1 DE3784085 D1 DE 3784085D1 DE 8787103989 T DE8787103989 T DE 8787103989T DE 3784085 T DE3784085 T DE 3784085T DE 3784085 D1 DE3784085 D1 DE 3784085D1
Authority
DE
Germany
Prior art keywords
magnetic recording
recording carrier
carrier
magnetic
recording
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
DE8787103989T
Other languages
English (en)
Other versions
DE3784085T2 (de
Inventor
Toshinobu Sueyoshi
Seiichi Asada
Masahiro Amemiya
Seigi Kawarai
Akira Miyake
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.)
Maxell Holdings Ltd
Original Assignee
Hitachi Maxell 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26404258&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3784085(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP61236664A external-priority patent/JP2686254B2/ja
Application filed by Hitachi Maxell Ltd filed Critical Hitachi Maxell Ltd
Publication of DE3784085D1 publication Critical patent/DE3784085D1/de
Application granted granted Critical
Publication of DE3784085T2 publication Critical patent/DE3784085T2/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
    • G11B5/706—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 composition of the magnetic material
    • G11B5/70605—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 composition of the magnetic material metals or alloys
    • G11B5/70615—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 composition of the magnetic material metals or alloys containing Fe metal or alloys
    • 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
    • G11B5/712—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 surface treatment or coating of 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
    • Y10T428/24—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.]
    • 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
    • Y10T428/29—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.]

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)
DE8787103989T 1986-03-20 1987-03-18 Magnetischer aufzeichnungstraeger. Expired - Lifetime DE3784085T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6316986 1986-03-20
JP61236664A JP2686254B2 (ja) 1986-03-20 1986-10-04 磁気記録媒体

Publications (2)

Publication Number Publication Date
DE3784085D1 true DE3784085D1 (de) 1993-03-25
DE3784085T2 DE3784085T2 (de) 1993-05-27

Family

ID=26404258

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787103989T Expired - Lifetime DE3784085T2 (de) 1986-03-20 1987-03-18 Magnetischer aufzeichnungstraeger.

Country Status (3)

Country Link
US (1) US4956220A (de)
EP (1) EP0238069B1 (de)
DE (1) DE3784085T2 (de)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110658A (en) * 1987-10-19 1992-05-05 Konica Corporation Magnetic recording medium
US5045390A (en) * 1988-04-22 1991-09-03 Konica Corporation Magnetic recording medium
US5084342A (en) * 1988-04-28 1992-01-28 Konica Corporation Magnetic recording medium
US5102732A (en) * 1988-07-15 1992-04-07 Konica Corporation Magnetic recording medium
US5064720A (en) * 1988-08-25 1991-11-12 Konica Corporation Magnetic recording medium containing a polyurethane binder resin having a betaine group in the form of an intermolecular salt
KR0150198B1 (ko) * 1988-10-31 1998-10-15 와따나베 히로시 바늘형상의 합금자성 분말 및 그 제조방법과 이것을 사용한 자기기록매체
JP2784794B2 (ja) * 1989-04-20 1998-08-06 戸田工業 株式会社 磁性酸化鉄粒子粉末
US5116683A (en) * 1989-06-14 1992-05-26 Konica Corporation Magnetic recording medium containing a specified ferromagnetic powder, polyurethane resin prepared from specified branched chain diols and a fatty acid ester
JP3017251B2 (ja) * 1990-06-20 2000-03-06 コニカ株式会社 磁気記録媒体
US5217804A (en) * 1990-11-06 1993-06-08 Eastman Kodak Company Magnetic particles
US5527603A (en) * 1992-10-13 1996-06-18 Konica Corporation Magnetic recording medium
US5460876A (en) * 1992-11-05 1995-10-24 Konica Corporation Magnetic recording medium
JP3398404B2 (ja) * 1992-11-11 2003-04-21 戸田工業株式会社 磁気記録用磁性粒子粉末の製造法
US5591512A (en) * 1993-02-03 1997-01-07 Hitachi Maxell, Ltd. Magnetic recording medium having a magnetic layer comprising iron powder and an underlayer comprising non magnetic powders having specified particle size ratios
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
US5599627A (en) * 1993-10-08 1997-02-04 Toda Kogyo Corporation Magnetic particles comprising magnetite core and process for producing the same
EP0718828A1 (de) * 1994-12-09 1996-06-26 Victor Company Of Japan, Ltd. Magnetisches Aufzeichnungsmedium und Bindemittel für die Magnetschicht eines solchen
CN1216144A (zh) * 1997-02-12 1999-05-05 Tdk株式会社 磁记录介质和磁记录/重放方法
WO1998051435A1 (en) * 1997-05-14 1998-11-19 Weixin Tang Fully-coated, uniform-sized metallic particles
US7285329B2 (en) * 2004-02-18 2007-10-23 Hitachi Metals, Ltd. Fine composite metal particles and their production method, micro-bodies, and magnetic beads

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4255492A (en) * 1969-09-25 1981-03-10 Eastman Kodak Company Magnetic recording crystals, process for producing same, and magnetic recording webs using same
US3814598A (en) * 1970-12-29 1974-06-04 Chromalloy American Corp Wear resistant powder metal magnetic pole piece made from oxide coated fe-al-si powders
US3736181A (en) * 1972-06-09 1973-05-29 Du Pont Method of coating cro2 with alumina
DE2611281A1 (de) * 1975-03-17 1976-09-30 Hitachi Ltd Verfahren zur herstellung von ferromagnetischem metallpulver
FR2386486A1 (fr) * 1977-04-07 1978-11-03 Montedison Spa Bioxyde de chrome ferromagnetique stabilise et son procede de preparation
DE2815712A1 (de) * 1978-04-12 1979-10-25 Bayer Ag Eisenoxide zur magnetischen signalaufzeichnung und verfahren zu deren herstellung
DE2904491A1 (de) * 1979-02-07 1980-08-21 Bayer Ag Plaettchenfoermige eisenoxidpigmente und verfahren zu deren herstellung sowie deren verwendung
JPS56105337A (en) * 1980-01-28 1981-08-21 Tdk Corp Magnetic recording medium and its production
EP0041727B1 (de) * 1980-06-11 1987-09-09 Hitachi Maxell Ltd. Verfahren zur Herstellung von im wesentlichen aus metallischem Eisen bestehenden ferromagnetischen Teilchen
JPS5760535A (en) * 1980-09-30 1982-04-12 Fuji Photo Film Co Ltd Magnetic recording medium
DE3422916A1 (de) * 1984-06-20 1986-01-02 Bayer Ag, 5090 Leverkusen Im wesentlichen aus eisen bestehende magnetische pigmente, verfahren zu ihrer herstellung sowie deren verwendung
DE3575035D1 (de) * 1985-04-26 1990-02-01 Ibm Deutschland Magnetaufzeichnungstraeger und verfahren zu seiner herstellung.
JPS6422604A (en) * 1987-07-16 1989-01-25 Terumi Fukashiro Power feeder for tire with retractable spike

Also Published As

Publication number Publication date
US4956220A (en) 1990-09-11
DE3784085T2 (de) 1993-05-27
EP0238069B1 (de) 1993-02-10
EP0238069A3 (en) 1989-09-06
EP0238069A2 (de) 1987-09-23

Similar Documents

Publication Publication Date Title
DE3784948D1 (de) Magnetischer aufzeichnungstraeger.
DE3781712D1 (de) Magnetischer aufzeichnungstraeger.
DE3888860D1 (de) Magnetischer Aufzeichnungsträger.
DE3850833D1 (de) Magnetischer Aufzeichnungsträger.
DE3866314D1 (de) Magnetooptischer aufzeichnungstraeger.
DE69013099D1 (de) Magnetischer Aufzeichnungsträger.
DE3784085D1 (de) Magnetischer aufzeichnungstraeger.
DE3669604D1 (de) Magnetischer aufzeichnungstraeger.
DE3788972D1 (de) Magnetischer Aufzeichnungsträger.
DE3577490D1 (de) Magnetischer aufzeichnungstraeger.
DE3575627D1 (de) Magnetischer aufzeichnungstraeger.
DE3776688D1 (de) Magnetischer aufzeichnungstraeger.
DE3683824D1 (de) Magnetischer aufzeichnungstraeger.
DE3789130D1 (de) Magnetischer Aufzeichnungsträger.
DE3676639D1 (de) Magnetischer aufzeichnungstraeger.
DE69005471D1 (de) Magnetischer Aufzeichnungsträger.
DE3575034D1 (de) Magnetischer aufzeichnungstraeger.
DE3778424D1 (de) Magnetischer aufzeichnungstraeger.
DE3788295D1 (de) Magnetischer Aufzeichnungsträger.
DE68909002D1 (de) Magnetischer Aufzeichnungsträger.
DE3889137D1 (de) Magnetischer Aufzeichnungsträger.
DE3761931D1 (de) Magnetische aufzeichnungstraeger.
DE3884119D1 (de) Magnetischer Aufzeichnungsträger.
DE3585489D1 (de) Magnetischer aufzeichnungstraeger.
DE68911569D1 (de) Magnetischer Aufzeichnungsträger.

Legal Events

Date Code Title Description
8363 Opposition against the patent
8365 Fully valid after opposition proceedings