CA1035208A - Substance magnetique pour enregistrement a haute densite - Google Patents

Substance magnetique pour enregistrement a haute densite

Info

Publication number
CA1035208A
CA1035208A CA207,345A CA207345A CA1035208A CA 1035208 A CA1035208 A CA 1035208A CA 207345 A CA207345 A CA 207345A CA 1035208 A CA1035208 A CA 1035208A
Authority
CA
Canada
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
Application number
CA207,345A
Other languages
English (en)
Other versions
CA207345S (en
Inventor
Matsuaki Nakamura
Yasuo Tamai
Masashi Aonuma
Hiroshi Ogawa
Goro Akashi
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film 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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of CA1035208A publication Critical patent/CA1035208A/fr
Expired 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
    • G11B5/706—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
    • G11B5/70621—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 Co metal or alloys

Landscapes

  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Paints Or Removers (AREA)
  • Magnetic Record Carriers (AREA)
  • Hard Magnetic Materials (AREA)
CA207,345A 1973-08-18 1974-08-19 Substance magnetique pour enregistrement a haute densite Expired CA1035208A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9272173A JPS5633775B2 (fr) 1973-08-18 1973-08-18

Publications (1)

Publication Number Publication Date
CA1035208A true CA1035208A (fr) 1978-07-25

Family

ID=14062302

Family Applications (1)

Application Number Title Priority Date Filing Date
CA207,345A Expired CA1035208A (fr) 1973-08-18 1974-08-19 Substance magnetique pour enregistrement a haute densite

Country Status (3)

Country Link
US (1) US3943012A (fr)
JP (1) JPS5633775B2 (fr)
CA (1) CA1035208A (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4096316A (en) * 1973-08-18 1978-06-20 Fuji Photo Film Co., Ltd. Method of producing magnetic material with alkaline borohydrides
US4009111A (en) * 1973-08-18 1977-02-22 Fuji Photo Film Co., Ltd. Magnetic recording medium
US4054530A (en) * 1973-09-28 1977-10-18 Graham Magnetics, Inc. Iron-nickel-cobalt magnetic powder and tape prepared therefrom
US4075672A (en) * 1976-02-09 1978-02-21 Graham Magnetics Incorporated Magnetic recording members
US4101311A (en) * 1977-08-01 1978-07-18 Fuji Photo Film Co., Ltd. Process for producing ferromagnetic metal powder
US4214893A (en) * 1977-11-07 1980-07-29 Nippon Columbia Kabushikikaisha Method of making a magnetic powder
JPS54122663A (en) * 1978-03-16 1979-09-22 Kanto Denka Kogyo Kk Production of magnetic powder for magnetic recording based on iron
US4237506A (en) * 1978-04-03 1980-12-02 Graham Magnetics Inc. Polymodal magnetic recording member
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
JPH0618063B2 (ja) * 1984-09-19 1994-03-09 日立マクセル株式会社 磁気デイスク
JPH0717924B2 (ja) * 1989-12-11 1995-03-01 日本ゼオン株式会社 表面改質磁性粉末の製造方法
JP2006012361A (ja) * 2004-06-29 2006-01-12 Fuji Photo Film Co Ltd 磁気記録媒体

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3206338A (en) * 1963-05-10 1965-09-14 Du Pont Non-pyrophoric, ferromagnetic acicular particles and their preparation
US3567525A (en) * 1968-06-25 1971-03-02 Du Pont Heat treated ferromagnetic particles
US3661556A (en) * 1969-03-03 1972-05-09 Du Pont Method of making ferromagnetic metal powders
US3535104A (en) * 1969-05-23 1970-10-20 Du Pont Ferromagnetic particles containing chromium
GB1363448A (en) * 1970-10-05 1974-08-14 Fuji Photo Film Co Ltd Magnetic recording material

Also Published As

Publication number Publication date
US3943012A (en) 1976-03-09
JPS5041506A (fr) 1975-04-16
JPS5633775B2 (fr) 1981-08-06

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