JPS5616939A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS5616939A
JPS5616939A JP9301279A JP9301279A JPS5616939A JP S5616939 A JPS5616939 A JP S5616939A JP 9301279 A JP9301279 A JP 9301279A JP 9301279 A JP9301279 A JP 9301279A JP S5616939 A JPS5616939 A JP S5616939A
Authority
JP
Japan
Prior art keywords
recording medium
substrate
thin film
layer
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.)
Pending
Application number
JP9301279A
Other languages
Japanese (ja)
Inventor
Hisao Matsuura
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 JP9301279A priority Critical patent/JPS5616939A/en
Publication of JPS5616939A publication Critical patent/JPS5616939A/en
Pending legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To obtain the magnetic recording medium excellent in thermal resistance, and preventing the occurrence of curl and flaws, by forming the metal thin film magnetic layer on one surface and forming the reinforce layer on another surface, to the plastic film substrate having specific heat shrinkate factor.
CONSTITUTION: The plastic film having 0W1% broadwise thermal contraction at 200°C for 30 minutes, is used as the substrate 1, and the surface side of the substrate 1 is formed the metal thin film magnetic layer 2 and the rear surface is formed with the reinforced layer 3 made of metal (oxide) thin film, to constitute the recording medium. Further, as the material of the reinforced layer 3, the Co-Ni alloy about 5W45wt% in Ni content and the Co-Ni alloy about 4W40wt% in Cr content are preferred.
COPYRIGHT: (C)1981,JPO&Japio
JP9301279A 1979-07-20 1979-07-20 Magnetic recording medium Pending JPS5616939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9301279A JPS5616939A (en) 1979-07-20 1979-07-20 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9301279A JPS5616939A (en) 1979-07-20 1979-07-20 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS5616939A true JPS5616939A (en) 1981-02-18

Family

ID=14070509

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9301279A Pending JPS5616939A (en) 1979-07-20 1979-07-20 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS5616939A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60261013A (en) * 1984-06-06 1985-12-24 Matsushita Electric Ind Co Ltd Magnetic recording medium
US4770924A (en) * 1986-07-02 1988-09-13 Tdk Corporation Magnetic recording medium
JPS63300429A (en) * 1987-05-29 1988-12-07 Matsushita Electric Ind Co Ltd Production of magnetic recording medium
US4801481A (en) * 1982-06-25 1989-01-31 Tokyo Shibaura Denki Kabushiki Kaisha Perpendicular magnetic recording floppy disk

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4801481A (en) * 1982-06-25 1989-01-31 Tokyo Shibaura Denki Kabushiki Kaisha Perpendicular magnetic recording floppy disk
JPS60261013A (en) * 1984-06-06 1985-12-24 Matsushita Electric Ind Co Ltd Magnetic recording medium
US4770924A (en) * 1986-07-02 1988-09-13 Tdk Corporation Magnetic recording medium
JPS63300429A (en) * 1987-05-29 1988-12-07 Matsushita Electric Ind Co Ltd Production of magnetic recording medium

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