JPS63217548A - Magneto-optical storage device - Google Patents

Magneto-optical storage device

Info

Publication number
JPS63217548A
JPS63217548A JP5004087A JP5004087A JPS63217548A JP S63217548 A JPS63217548 A JP S63217548A JP 5004087 A JP5004087 A JP 5004087A JP 5004087 A JP5004087 A JP 5004087A JP S63217548 A JPS63217548 A JP S63217548A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
head
magnetic
disk
optical
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.)
Granted
Application number
JP5004087A
Other versions
JP2575687B2 (en )
Inventor
Yoichi Kawakubo
Yoshinori Miyamura
Takeshi Nakao
Toyoji Okuwaki
Masahiro Oshima
Yoshinori Takeuchi
Yuzo Yamaguchi
Original Assignee
Hitachi 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

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504Recording
    • G11B11/10508Recording by modulating only the magnetic field at the transducer
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10517Overwriting or erasing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532Heads
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • G11B11/10Recording 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
    • G11B11/105Recording 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 thermo-magnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055Disposition or mounting of transducers relative to record carriers
    • G11B11/1058Flying heads

Abstract

PURPOSE: To widen the effective magnetic field impressing area of a magnetic head and to improve the performance of an optical disk by disposing an optical head and the magnetic head face to face sandwiching a recording carrier, and using a floating type magnetic head for the said magnetic head.
CONSTITUTION: On top of the transparent disk substrate 103 of a magnetic disk 1 as a rotary recording carrier,a magneto-optical recording film 101 having magnetooptics effect and a protection film 102 are formed. A light beam from the semiconductor laser 2 of the optical head 11 is subjected to a beam splitter 4 and is made incident to a condensing lens 5, and thus condnesed beam is radiated on the disk 1. Sandwiching this disk 1, the magnetic head 12 is so disposed in facing the optical head 11. And this head 12 is constituted of a coil to impress a magnetic field on the recording film 101 and a slider part to float the entire head. The hight of the floating of the head 12 is made more than 1μm, and the extent of the magnetic field impressing area in which the head 12 is effective in recording/erasing is limited within a range 0.01mm2W1mm2, so that said magnetic impressing area expands in the direction orthogonal to the track direction rather than the track direction.
COPYRIGHT: (C)1988,JPO&Japio
JP5004087A 1987-03-06 1987-03-06 Magneto-optical storage device Expired - Lifetime JP2575687B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5004087A JP2575687B2 (en) 1987-03-06 1987-03-06 Magneto-optical storage device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP5004087A JP2575687B2 (en) 1987-03-06 1987-03-06 Magneto-optical storage device
US07153094 US5020041A (en) 1987-03-06 1988-02-08 Magneto-optical memory apparatus having a floating magnetic head
DE19883804733 DE3804733C2 (en) 1987-03-06 1988-02-15
KR880001464A KR910002755B1 (en) 1987-03-06 1988-02-15 Magneto-optical storage device

Publications (2)

Publication Number Publication Date
JPS63217548A true true JPS63217548A (en) 1988-09-09
JP2575687B2 JP2575687B2 (en) 1997-01-29

Family

ID=12847886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5004087A Expired - Lifetime JP2575687B2 (en) 1987-03-06 1987-03-06 Magneto-optical storage device

Country Status (3)

Country Link
JP (1) JP2575687B2 (en)
KR (1) KR910002755B1 (en)
DE (1) DE3804733C2 (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0384472A1 (en) 1989-02-23 1990-08-29 Fuji Photo Film Co., Ltd. Resin composition and packaging material for photosensitive materials
JPH02226563A (en) * 1989-02-27 1990-09-10 Hitachi Ltd High floating magnetic head
JPH02312033A (en) * 1989-05-26 1990-12-27 Canon Inc Magneto-optical recording and reproducing device
EP0407191A2 (en) * 1989-07-06 1991-01-09 Matsushita Electric Industrial Co., Ltd. Magneto-optical recording medium and apparatus
JPH03157837A (en) * 1989-11-15 1991-07-05 Matsushita Electric Ind Co Ltd Magneto-optical disk and magneto-optical disk cartridge
JPH03157836A (en) * 1989-11-15 1991-07-05 Matsushita Electric Ind Co Ltd Magneto-optical disk
JPH0448406A (en) * 1990-06-13 1992-02-18 Sharp Corp Magneto-optical recording and reproducing device and magnetic head
US5321672A (en) * 1989-04-19 1994-06-14 Hitachi, Ltd. Method of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domains
JPH0773536A (en) * 1994-03-04 1995-03-17 Hitachi Ltd Magneto-optical memory method
JPH07192342A (en) * 1993-12-28 1995-07-28 Nec Corp Method for reproducing magneto-optical recording medium
US5553037A (en) * 1993-12-20 1996-09-03 Canon Kabushiki Kaisha Magneto-optical recording-reproducing system in which a magnetic head bottom surface roughness is related to a recording medium protective film surface roughness
US5689478A (en) * 1992-10-09 1997-11-18 Canon Kabushiki Kaisha Magnetic head for magneto-optical recording and magneto-optical recording apparatus in which a magnetic core mounted to a slider has particular dimensions and properties
US6404705B1 (en) 1997-03-14 2002-06-11 Hitachi Maxell, Ltd. Magneto-optical disk apparatus having an adjustment mechanism for setting the position of magnetic heads

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0390221B1 (en) * 1989-03-31 1995-06-07 Hitachi, Ltd. Magneto-optical recording apparatus
US5172364A (en) * 1989-08-01 1992-12-15 Mitsubishi Denki Kabushiki Kaisha Magneto-optic recording apparatus with controlled magnetic field generation
JP2574903B2 (en) * 1989-10-11 1997-01-22 シャープ株式会社 Magneto-optical recording device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH065585B2 (en) * 1984-02-15 1994-01-19 株式会社日立製作所 Magneto-optical storage device
JPH0648806B2 (en) * 1985-10-09 1994-06-22 松下電器産業株式会社 Signal multiplexing apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0384472A1 (en) 1989-02-23 1990-08-29 Fuji Photo Film Co., Ltd. Resin composition and packaging material for photosensitive materials
JPH02226563A (en) * 1989-02-27 1990-09-10 Hitachi Ltd High floating magnetic head
US5321672A (en) * 1989-04-19 1994-06-14 Hitachi, Ltd. Method of an apparatus for magneto-optically recording information by changing the position or shape or controlling the diameter of reversed domains
JPH02312033A (en) * 1989-05-26 1990-12-27 Canon Inc Magneto-optical recording and reproducing device
EP0407191A2 (en) * 1989-07-06 1991-01-09 Matsushita Electric Industrial Co., Ltd. Magneto-optical recording medium and apparatus
EP0407191A3 (en) * 1989-07-06 1992-09-30 Matsushita Electric Industrial Co., Ltd. Magneto-optical recording medium and apparatus
JPH03157836A (en) * 1989-11-15 1991-07-05 Matsushita Electric Ind Co Ltd Magneto-optical disk
JPH03157837A (en) * 1989-11-15 1991-07-05 Matsushita Electric Ind Co Ltd Magneto-optical disk and magneto-optical disk cartridge
JPH0448406A (en) * 1990-06-13 1992-02-18 Sharp Corp Magneto-optical recording and reproducing device and magnetic head
US5689478A (en) * 1992-10-09 1997-11-18 Canon Kabushiki Kaisha Magnetic head for magneto-optical recording and magneto-optical recording apparatus in which a magnetic core mounted to a slider has particular dimensions and properties
US5553037A (en) * 1993-12-20 1996-09-03 Canon Kabushiki Kaisha Magneto-optical recording-reproducing system in which a magnetic head bottom surface roughness is related to a recording medium protective film surface roughness
JPH07192342A (en) * 1993-12-28 1995-07-28 Nec Corp Method for reproducing magneto-optical recording medium
JPH0773536A (en) * 1994-03-04 1995-03-17 Hitachi Ltd Magneto-optical memory method
US6404705B1 (en) 1997-03-14 2002-06-11 Hitachi Maxell, Ltd. Magneto-optical disk apparatus having an adjustment mechanism for setting the position of magnetic heads

Also Published As

Publication number Publication date Type
KR910002755B1 (en) 1991-05-04 grant
JP2575687B2 (en) 1997-01-29 grant
DE3804733A1 (en) 1988-09-15 application
DE3804733C2 (en) 1992-08-06 grant

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Legal Events

Date Code Title Description
EXPY Cancellation because of completion of term