JPS6432443A - Magneto-optical recording medium - Google Patents

Magneto-optical recording medium

Info

Publication number
JPS6432443A
JPS6432443A JP18915387A JP18915387A JPS6432443A JP S6432443 A JPS6432443 A JP S6432443A JP 18915387 A JP18915387 A JP 18915387A JP 18915387 A JP18915387 A JP 18915387A JP S6432443 A JPS6432443 A JP S6432443A
Authority
JP
Japan
Prior art keywords
cobalt ferrite
photoresist
ferrite layer
light guide
laser light
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
JP18915387A
Other languages
Japanese (ja)
Inventor
Mitsuhiro Horikawa
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson 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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP18915387A priority Critical patent/JPS6432443A/en
Publication of JPS6432443A publication Critical patent/JPS6432443A/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
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10586—Record carriers characterised by the selection of the material or by the structure or form characterised by the selection of the material
    • 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
    • G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
    • G11B11/10584—Record carriers characterised by the selection of the material or by the structure or form characterised by the form, e.g. comprising mechanical protection elements

Abstract

PURPOSE:To improve weatherability and to simplify a production process by allowing a cobalt ferrite layer formed on a hard glass substrate to function both as an information recording layer and as laser light guide layers without forming the laser light guide grooves on the substrate. CONSTITUTION:A photoresist is coated over the entire surface of the hard glass substrate 1 and is prebaked; thereafter, the photoresist is exposed for the laser light guide grooves by a laser beam cutting device and is developed. Post baking is then executed in an inert gaseous atmosphere in such a manner that the photoresist does not sag at the time of forming the cobalt ferrite layer 2. The cobalt ferrite layer 2 is formed by the sputtering method and the photoresist remaining thereafter is stripped. The cobalt ferrite layer is heat- treated in an oxygen atmosphere in order to convert the formed cobalt ferrite to a perpendicularly magnetized film. A reflecting film 3 is then formed by vapor deposition. Since the guide grooves are formed by a lift-off method, the stage for etching the glass substrate 1 by reactive ion etching is decreased. The weatherability is thereby improved and the production process is simplified.
JP18915387A 1987-07-29 1987-07-29 Magneto-optical recording medium Pending JPS6432443A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18915387A JPS6432443A (en) 1987-07-29 1987-07-29 Magneto-optical recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18915387A JPS6432443A (en) 1987-07-29 1987-07-29 Magneto-optical recording medium

Publications (1)

Publication Number Publication Date
JPS6432443A true JPS6432443A (en) 1989-02-02

Family

ID=16236323

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18915387A Pending JPS6432443A (en) 1987-07-29 1987-07-29 Magneto-optical recording medium

Country Status (1)

Country Link
JP (1) JPS6432443A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190314A (en) * 1990-07-04 1993-03-02 Mazda Motor Corporation Glove box structure of vehicle
US6268631B1 (en) 1993-10-12 2001-07-31 Semiconductor Energy Laboratoty Co., Ltd. Glass substrate assembly, semiconductor device and method of heat-treating glass substrate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5190314A (en) * 1990-07-04 1993-03-02 Mazda Motor Corporation Glove box structure of vehicle
US6268631B1 (en) 1993-10-12 2001-07-31 Semiconductor Energy Laboratoty Co., Ltd. Glass substrate assembly, semiconductor device and method of heat-treating glass substrate
US6847097B2 (en) 1993-10-12 2005-01-25 Semiconductor Energy Laboratory Co., Ltd. Glass substrate assembly, semiconductor device and method of heat-treating glass substrate
US7038302B2 (en) 1993-10-12 2006-05-02 Semiconductor Energy Laboratory Co., Ltd. Glass substrate assembly, semiconductor device and method of heat-treating glass substrate

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