JPS57135446A - Manufacture of optical magnetic disk - Google Patents

Manufacture of optical magnetic disk

Info

Publication number
JPS57135446A
JPS57135446A JP2205781A JP2205781A JPS57135446A JP S57135446 A JPS57135446 A JP S57135446A JP 2205781 A JP2205781 A JP 2205781A JP 2205781 A JP2205781 A JP 2205781A JP S57135446 A JPS57135446 A JP S57135446A
Authority
JP
Japan
Prior art keywords
thin film
substrate
vacuum tank
magnetic thin
vapor
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
JP2205781A
Other languages
Japanese (ja)
Inventor
Hideji Kawabata
Masahiro Orukawa
Akira Muto
Noriaki Hara
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 JP2205781A priority Critical patent/JPS57135446A/en
Publication of JPS57135446A publication Critical patent/JPS57135446A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field

Abstract

PURPOSE:To obtain an inexpensive optical magnetic disk and to realize its mass production, by forming a magnetic thin film and an SiO thin film in order on a substrate in a vacuum tank, and after that, taking it out in the air, and executing its heat treatment in a non-oxidized atmosphere. CONSTITUTION:Ternary elements constituting Mn-X-Bi are vapordeposited on a substrate alternately or simultaneously in a vacuum tank of 10<-6>Toor or above, and its whole film thickness is set to 1,000Angstrom or below. After vapor- deposition of an element for constituting a magnetic thin film has been completed, an SiO thin film is vapor-deposited so that its film thickness becomes within the range of 500Angstrom -1,000Angstrom in the same vacuum tank for the purpose of both a force emphasizing effect and protection of the magnetic thin film. After that, said substrate is taken out in the air, is put into a heating device, it is made vacuum by a rotary pump, and after that, the device is filled with non- oxidized gas such as Ar, H2, etc., and its heat treatment is performed at 250 deg.C- 400 deg.C for 1hr- a few hours. After cooling, a transparent protective layer is attached, and an optical disk is obtained. In this way, an optical disk which is large in its reproducing S/N ratio and can be rewritten is manufactured in large quantities and also easily.
JP2205781A 1981-02-16 1981-02-16 Manufacture of optical magnetic disk Pending JPS57135446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2205781A JPS57135446A (en) 1981-02-16 1981-02-16 Manufacture of optical magnetic disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2205781A JPS57135446A (en) 1981-02-16 1981-02-16 Manufacture of optical magnetic disk

Publications (1)

Publication Number Publication Date
JPS57135446A true JPS57135446A (en) 1982-08-21

Family

ID=12072278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2205781A Pending JPS57135446A (en) 1981-02-16 1981-02-16 Manufacture of optical magnetic disk

Country Status (1)

Country Link
JP (1) JPS57135446A (en)

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