JPS5633810A - Preparation of magnetic recording medium - Google Patents

Preparation of magnetic recording medium

Info

Publication number
JPS5633810A
JPS5633810A JP10984379A JP10984379A JPS5633810A JP S5633810 A JPS5633810 A JP S5633810A JP 10984379 A JP10984379 A JP 10984379A JP 10984379 A JP10984379 A JP 10984379A JP S5633810 A JPS5633810 A JP S5633810A
Authority
JP
Japan
Prior art keywords
base material
magnetic
improved
deposition
heat
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.)
Granted
Application number
JP10984379A
Other languages
Japanese (ja)
Other versions
JPS6122852B2 (en
Inventor
Norio Yokoyama
Eisuke Miyairi
Chuji Seki
Yasuyoshi Kudo
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10984379A priority Critical patent/JPS5633810A/en
Publication of JPS5633810A publication Critical patent/JPS5633810A/en
Publication of JPS6122852B2 publication Critical patent/JPS6122852B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates

Abstract

PURPOSE:To increase coercive force and mechanical strength enabling high density recording and improving durability by forming a metallic magnetic layer on a nonmagnetic base material and then heat-treating in a nonreducing atomosphere at a particular temperature. CONSTITUTION:After forming a metallic magnetic material layer on a nonmagnetic base material 6 by deposition, etc., it is heat-treated in a nonreducing atmosphere at 200-450 deg.C. For the nonmagnetic base material 6, for example, a plastic film of polyimide, polyamidimide, etc., is used. By so doing, the surfaces of the deposited magnetic grains are oxidized by the heat treatment at a temperature not higher than 450 deg.C which does not influence the base material 6, the grains are separated and coercive force is improved, and also the mechanical strength of the magnetic material layer is increased. Therefore, the short wave characteristics are improved enabling high density recording, the angle of incidence of oblique deposition is reduced increasing the efficiency of deposition, and the durability of the magnetic recording medium can also be improved.
JP10984379A 1979-08-29 1979-08-29 Preparation of magnetic recording medium Granted JPS5633810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10984379A JPS5633810A (en) 1979-08-29 1979-08-29 Preparation of magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10984379A JPS5633810A (en) 1979-08-29 1979-08-29 Preparation of magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5633810A true JPS5633810A (en) 1981-04-04
JPS6122852B2 JPS6122852B2 (en) 1986-06-03

Family

ID=14520599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10984379A Granted JPS5633810A (en) 1979-08-29 1979-08-29 Preparation of magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5633810A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57198543A (en) * 1981-05-28 1982-12-06 Matsushita Electric Ind Co Ltd Manufacture of magnetic recording medium
JPS58212116A (en) * 1982-06-04 1983-12-09 Hitachi Condenser Co Ltd Manufacture of magnetic recording medium
JPS5982637A (en) * 1982-11-04 1984-05-12 Hitachi Ltd Vertical magnetic recording medium
JPS59173919A (en) * 1983-03-23 1984-10-02 富士電機株式会社 Hydraulic actuator of breaker
US4546725A (en) * 1983-03-08 1985-10-15 Fuji Photo Film Co., Ltd. Apparatus for manufacturing magnetic recording media
JPS6199925A (en) * 1984-10-19 1986-05-19 Nec Corp Magnetic storage medium and its production
JPH01110715A (en) * 1987-10-23 1989-04-27 Yaskawa Electric Mfg Co Ltd Formation of ferromagnetic thin film
EP1850355A1 (en) * 2002-05-31 2007-10-31 FUJIFILM Corporation Magnetic particle and its production method
US7384449B2 (en) 2001-09-05 2008-06-10 Fujifilm Corporation Ferromagnetic nanoparticles, material coated with dispersion of ferromagnetic nanoparticles, and magnetic recording medium using the material

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57198543A (en) * 1981-05-28 1982-12-06 Matsushita Electric Ind Co Ltd Manufacture of magnetic recording medium
JPH0319612B2 (en) * 1981-05-28 1991-03-15 Matsushita Electric Ind Co Ltd
JPS58212116A (en) * 1982-06-04 1983-12-09 Hitachi Condenser Co Ltd Manufacture of magnetic recording medium
JPS5982637A (en) * 1982-11-04 1984-05-12 Hitachi Ltd Vertical magnetic recording medium
JPH0416855B2 (en) * 1982-11-04 1992-03-25 Hitachi Seisakusho Kk
US4546725A (en) * 1983-03-08 1985-10-15 Fuji Photo Film Co., Ltd. Apparatus for manufacturing magnetic recording media
JPS59173919A (en) * 1983-03-23 1984-10-02 富士電機株式会社 Hydraulic actuator of breaker
JPS6199925A (en) * 1984-10-19 1986-05-19 Nec Corp Magnetic storage medium and its production
JPH01110715A (en) * 1987-10-23 1989-04-27 Yaskawa Electric Mfg Co Ltd Formation of ferromagnetic thin film
US7384449B2 (en) 2001-09-05 2008-06-10 Fujifilm Corporation Ferromagnetic nanoparticles, material coated with dispersion of ferromagnetic nanoparticles, and magnetic recording medium using the material
EP1850355A1 (en) * 2002-05-31 2007-10-31 FUJIFILM Corporation Magnetic particle and its production method
US7335393B2 (en) 2002-05-31 2008-02-26 Fujifilm Corporation Magnetic particle, its production method, magnetic recording medium and its production method

Also Published As

Publication number Publication date
JPS6122852B2 (en) 1986-06-03

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