DE69311834D1 - Magnetisches Aufzeichnungsmedium - Google Patents

Magnetisches Aufzeichnungsmedium

Info

Publication number
DE69311834D1
DE69311834D1 DE69311834T DE69311834T DE69311834D1 DE 69311834 D1 DE69311834 D1 DE 69311834D1 DE 69311834 T DE69311834 T DE 69311834T DE 69311834 T DE69311834 T DE 69311834T DE 69311834 D1 DE69311834 D1 DE 69311834D1
Authority
DE
Germany
Prior art keywords
recording medium
magnetic recording
magnetic
medium
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
DE69311834T
Other languages
English (en)
Other versions
DE69311834T3 (de
DE69311834T2 (de
Inventor
Ryousuke Isobe
Takafumi Yanagita
Kazuyoshi Imai
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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=27454533&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69311834(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from JP4262037A external-priority patent/JPH05347017A/ja
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of DE69311834D1 publication Critical patent/DE69311834D1/de
Application granted granted Critical
Publication of DE69311834T2 publication Critical patent/DE69311834T2/de
Publication of DE69311834T3 publication Critical patent/DE69311834T3/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
    • G11B5/73—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
DE69311834T 1992-04-14 1993-04-14 Magnetisches Aufzeichnungsmedium Expired - Lifetime DE69311834T3 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP9458492 1992-04-14
JP11274692 1992-05-01
JP4262037A JPH05347017A (ja) 1992-04-14 1992-09-30 磁気記録媒体
JP665793 1993-01-19

Publications (3)

Publication Number Publication Date
DE69311834D1 true DE69311834D1 (de) 1997-08-07
DE69311834T2 DE69311834T2 (de) 1997-11-27
DE69311834T3 DE69311834T3 (de) 2001-11-15

Family

ID=27454533

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69311834T Expired - Lifetime DE69311834T3 (de) 1992-04-14 1993-04-14 Magnetisches Aufzeichnungsmedium

Country Status (2)

Country Link
EP (1) EP0566378B2 (de)
DE (1) DE69311834T3 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5527603A (en) † 1992-10-13 1996-06-18 Konica Corporation Magnetic recording medium
DE19747068A1 (de) 1997-10-24 1999-04-29 Emtec Magnetics Gmbh Magnetischer Aufzeichnungsträger mit hoher Aufzeichnungsdichte und Verfahren zu seiner Herstellung

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52122213A (en) † 1976-04-05 1977-10-14 Hitachi Ltd Production of ferromagnetic metal powder
US4400337A (en) † 1981-01-10 1983-08-23 Hitachi Maxell, Ltd. Method for production of metal magnetic particles
JPS59207024A (ja) † 1983-05-10 1984-11-24 Konishiroku Photo Ind Co Ltd 磁気記録媒体
JPH0740352B2 (ja) † 1986-12-30 1995-05-01 コニカ株式会社 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
US5045390A (en) † 1988-04-22 1991-09-03 Konica Corporation Magnetic recording medium
JPH01300419A (ja) † 1988-05-30 1989-12-04 Hitachi Maxell Ltd 磁気記録媒体
JP2819029B2 (ja) † 1988-09-19 1998-10-30 コニカ株式会社 磁気記録媒体
JP2893267B2 (ja) † 1989-03-28 1999-05-17 コニカ株式会社 磁気記録媒体
EP0390391B2 (de) † 1989-03-28 2000-12-20 Konica Corporation Magnetischer Aufzeichnungsträger mit verbesserter elektromagnetischer Umwandlungscharakteristik und Schutz gegen Umwelteinflüsse
EP0442422B1 (de) * 1990-02-13 1994-11-02 Matsushita Electric Industrial Co., Ltd. Magnetische Aufzeichnungsträger
US5320901A (en) † 1990-06-20 1994-06-14 Konica Corporation Magnetic recording medium
JPH04251434A (ja) † 1990-12-28 1992-09-07 Konica Corp 磁気記録媒体
DE69213115T3 (de) † 1991-04-25 2005-05-19 Fuji Photo Film Co., Ltd., Minami-Ashigara Magnetische Aufzeichnungsträger
DE69328696T2 (de) † 1992-01-08 2001-04-19 Fuji Photo Film Co., Ltd. Magnetisches Aufzeichnungsmedium
JPH0722224A (ja) † 1993-07-01 1995-01-24 Dowa Mining Co Ltd 強磁性金属粉末

Also Published As

Publication number Publication date
DE69311834T3 (de) 2001-11-15
EP0566378B1 (de) 1997-07-02
EP0566378A1 (de) 1993-10-20
EP0566378B2 (de) 2001-05-09
DE69311834T2 (de) 1997-11-27

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings