JPS5774851A - Magnetic optical recording device and its manufacture - Google Patents

Magnetic optical recording device and its manufacture

Info

Publication number
JPS5774851A
JPS5774851A JP14915580A JP14915580A JPS5774851A JP S5774851 A JPS5774851 A JP S5774851A JP 14915580 A JP14915580 A JP 14915580A JP 14915580 A JP14915580 A JP 14915580A JP S5774851 A JPS5774851 A JP S5774851A
Authority
JP
Japan
Prior art keywords
recording
laser beam
track
temperature
bit
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
JP14915580A
Other languages
Japanese (ja)
Other versions
JPS5925290B2 (en
Inventor
Hideyoshi Yamaoka
Akira Takahashi
Kenji Oota
Takao Hiuga
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.)
Sharp Corp
Original Assignee
Sharp 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 Sharp Corp filed Critical Sharp Corp
Priority to JP14915580A priority Critical patent/JPS5925290B2/en
Publication of JPS5774851A publication Critical patent/JPS5774851A/en
Publication of JPS5925290B2 publication Critical patent/JPS5925290B2/en
Expired 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
    • G11B11/105—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 using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing

Landscapes

  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To record and reproduce satisfactorily and also to simplify a manufacturing process, by providing a crystallized guide bit on the same track as a recording track of a recording medium containing an amorphous magnetic film. CONSTITUTION:On a glass or plastic disk, for instance, a GdDyFe compound thin film 2 being an amorphous magnetic material is formed, on which an SiO2 protective film 3 is formed. A guide bit 4 is formed on a recording track 5 by heating the thin film 2 to >= a crystallization temperature of about 350 deg.C, by an Ar laser beam. The transmission factor is increased to 3.4% from 2.1% by means of crystallization by wavelength (6328Angstrom ) of an He-Ne laser beam. On the recording track 5, a recording bit 6 is formed at a temperature of about 100 deg.C curie temperature, by the laser beam. In this way, recording and reproduction are executed satisfactorily, and the manufacturing process is also simplified.
JP14915580A 1980-10-23 1980-10-23 magneto-optical recording device Expired JPS5925290B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14915580A JPS5925290B2 (en) 1980-10-23 1980-10-23 magneto-optical recording device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14915580A JPS5925290B2 (en) 1980-10-23 1980-10-23 magneto-optical recording device

Publications (2)

Publication Number Publication Date
JPS5774851A true JPS5774851A (en) 1982-05-11
JPS5925290B2 JPS5925290B2 (en) 1984-06-16

Family

ID=15468983

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14915580A Expired JPS5925290B2 (en) 1980-10-23 1980-10-23 magneto-optical recording device

Country Status (1)

Country Link
JP (1) JPS5925290B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03242841A (en) * 1990-02-21 1991-10-29 Matsushita Electric Ind Co Ltd Magneto-optical disk

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61166959U (en) * 1985-04-05 1986-10-16
JPH0441821U (en) * 1990-08-08 1992-04-09

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03242841A (en) * 1990-02-21 1991-10-29 Matsushita Electric Ind Co Ltd Magneto-optical disk

Also Published As

Publication number Publication date
JPS5925290B2 (en) 1984-06-16

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