JPS5778628A - Manufacture of magnetic recording medium - Google Patents

Manufacture of magnetic recording medium

Info

Publication number
JPS5778628A
JPS5778628A JP55154255A JP15425580A JPS5778628A JP S5778628 A JPS5778628 A JP S5778628A JP 55154255 A JP55154255 A JP 55154255A JP 15425580 A JP15425580 A JP 15425580A JP S5778628 A JPS5778628 A JP S5778628A
Authority
JP
Japan
Prior art keywords
high polymer
polymer molding
molding substrate
subsequently
vertical direction
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
JP55154255A
Other languages
Japanese (ja)
Other versions
JPS63845B2 (en
Inventor
Koichi Shinohara
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55154255A priority Critical patent/JPS5778628A/en
Publication of JPS5778628A publication Critical patent/JPS5778628A/en
Publication of JPS63845B2 publication Critical patent/JPS63845B2/ja
Granted 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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/672—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having different compositions in a plurality of magnetic layers, e.g. layer compositions having differing elemental components or differing proportions of elements

Landscapes

  • Magnetic Record Carriers (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To obtain a flexible magnetic disk which has formed a metallic film having an easy magnetizing axis in the vertical direction, on only one surface of a high polymer molding substrate, by forming a ferromagnetic metallic thin film, and after that, executing its heat treatment. CONSTITUTION:On a high polymer molding substrate 6, a ferromagnetic metallic layer having an easy magnetizing axis in the vertical direction to the film surface, such as a permalloy layer 7, a Co-Cr alloy layer, etc. is formed, and after that, is treated for several hours at a temperature close to a 70-80 deg.C glass transition point of the high polymer molding substrate, subsequently the relaxation of stress is executed by heating it, moving it along the heating roll, the leveling is completed, and subsequently it is punched to a disk shape, by which a flexible magnetic disk is obtained.
JP55154255A 1980-10-31 1980-10-31 Manufacture of magnetic recording medium Granted JPS5778628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55154255A JPS5778628A (en) 1980-10-31 1980-10-31 Manufacture of magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55154255A JPS5778628A (en) 1980-10-31 1980-10-31 Manufacture of magnetic recording medium

Publications (2)

Publication Number Publication Date
JPS5778628A true JPS5778628A (en) 1982-05-17
JPS63845B2 JPS63845B2 (en) 1988-01-08

Family

ID=15580205

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55154255A Granted JPS5778628A (en) 1980-10-31 1980-10-31 Manufacture of magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5778628A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5921662U (en) * 1982-07-30 1984-02-09 株式会社徳田製作所 sputtering equipment
JPS6076026A (en) * 1983-09-30 1985-04-30 Fuji Xerox Co Ltd Production of vertical magnetic recording medium
WO1995003439A1 (en) * 1993-07-21 1995-02-02 Dynamotive Corporation A method for removal of certain oxide films from metal surfaces

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022182869A1 (en) 2021-02-24 2022-09-01 Bluehalo Llc System and method for a digitally beamformed phased array feed

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5423506A (en) * 1977-07-22 1979-02-22 Matsushita Electric Ind Co Ltd Production of magnetic recording media

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5423506A (en) * 1977-07-22 1979-02-22 Matsushita Electric Ind Co Ltd Production of magnetic recording media

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5921662U (en) * 1982-07-30 1984-02-09 株式会社徳田製作所 sputtering equipment
JPS6076026A (en) * 1983-09-30 1985-04-30 Fuji Xerox Co Ltd Production of vertical magnetic recording medium
WO1995003439A1 (en) * 1993-07-21 1995-02-02 Dynamotive Corporation A method for removal of certain oxide films from metal surfaces

Also Published As

Publication number Publication date
JPS63845B2 (en) 1988-01-08

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