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KR910006938A - 광자기 기록 매체, 광자기 기록 장치 및 광자기 기록 매체의 제조 방법 - Google Patents

광자기 기록 매체, 광자기 기록 장치 및 광자기 기록 매체의 제조 방법 Download PDF

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Publication number
KR910006938A
KR910006938A KR1019900013555A KR900013555A KR910006938A KR 910006938 A KR910006938 A KR 910006938A KR 1019900013555 A KR1019900013555 A KR 1019900013555A KR 900013555 A KR900013555 A KR 900013555A KR 910006938 A KR910006938 A KR 910006938A
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South Korea
Prior art keywords
magnetic
recording medium
magneto
magnetic field
optical recording
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KR1019900013555A
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KR930009225B1 (ko
Inventor
구니마로 다나까
이사오 와따나베
고이찌 다께우찌
오사무 이또
교스께 요시모또
가즈히꼬 쯔쯔미
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시기 모리야
미쯔비시덴끼 가부시끼가이샤
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Priority claimed from JP1299396A external-priority patent/JPH03205630A/ja
Priority claimed from JP01304279A external-priority patent/JP3094029B2/ja
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Publication of KR910006938A publication Critical patent/KR910006938A/ko
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Publication of KR930009225B1 publication Critical patent/KR930009225B1/ko
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • 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
    • G11B11/10502—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 characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/10506—Recording by modulating only the light beam of the transducer
    • 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
    • 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
    • G11B11/10532—Heads
    • G11B11/10534—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording
    • G11B11/10536—Heads for recording by magnetising, demagnetising or transfer of magnetisation, by radiation, e.g. for thermomagnetic recording using thermic beams, e.g. lasers
    • 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
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10552—Arrangements of transducers relative to each other, e.g. coupled heads, optical and magnetic head on the same base
    • 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
    • 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

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

내용 없음.

Description

광자기 기록 매체, 광자기 기록 장치 및 광자기 기록 매체의 제조방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제 1 도는 본 발명의 실시예 1의 광자기 기록 장치의 주요부의 모식적 단면도.
제 2 도는 발광소자의 발사광의 광강도의 변화를 나타낸 파형도.
제 3 도는 본 발명의 다른 실시예의 광자기 기록 매체의 확대 단면도.

Claims (8)

  1. 수직 자기 이방성을 가지며, 적어도 자화방향이 반전가능한 제 1 자성층(3A, 3B)와 수직 자기 이방성을 가지며, 자화방향이 반전불가능한 제 2 자성층(4A, 4B)를 적층하고 있는 단위 기록 매체(A, B)를 2층으로 적층하고 있으며, 적층한 양 단위 기록 매체의 제 2 자성층의 자화방향을 모두 같은 방향으로 하고 있는 것을 특징으로 하는 광자기 기록 매체.
  2. 수직 자기 이방성을 가지며, 자화방향이 반전 가능한 제 1 자성층과 수직 자기 이방성을 가지며, 자화 방향이 반전불가능한 제 2 자성층을 적어도 적층해서 되는 단위 기록 매체를 2층으로 적층하고 있으며, 각각의 제 2 자성층의 자화방향을 서로 역방향으로 하고 있는 것을 특징으로 하는 광자기 기록 매체.
  3. 수직 자기 이방성을 가지며, 적어도 자화방향이 반전가능한 제 1 자성층(3)과 수직 자기 이방성을 가지며, 자화방향이 반전 불가능한 제 2 자성층(4)을 적층하고 있는 광자기 기록 매체(D)에 대해서 광빔(7)을 투사하는 수단과 상기 광빔 조사측으로 상기 광자기 기록 매체에 한쪽방향의 반전하지 않는 자계를 부여하는 자계발생수단(8)을 포함하는 광자기 기록 장치.
  4. 특허청구의 범위 제 3 항에 있어서, 상기 자계발생수단은 원통형상의 코일을 포함하는 광자기 기록 장치.
  5. 적어도 자화방향이 반전 가능한 제 1 자성층과 자화방향이 반전 불가능한 제 2 자성층을 적층하고 있는 단위 기록 매체(A, B)를 2층으로 적층하고 있으며, 적층한 양 단위 기록 매체의 제 2 자성층의 자화방향을 모두 같은 방향으로 하고 있는 광자기 기록 매체(D)에 대해서 상기 광자기 기록 매체의 양면측 각각에서 광빔을 투사하는 수단 및 그 광빔 투사측에 마련되어 자계를 부여하는 자계발생수단(8A, 8B)을 포함하고, 상기 자계발생수단이 발생하는 자계의 방향을 상기 제 2 자성층의 자화방향과 역방향으로 하고 있는 것을 특징으로 하는 광자기 기록 장치.
  6. 수직 자기 이방성을 가지며, 자화방향이 반전 가능한 제 1 자성층과 수직 자기 이방성을 가지며, 자화방향이 반전 불가능한 제 2 자성층을 적층하고 있는 단위 기록 매체를 2층으로 적층하고 있으며, 각각의 제 2 자성층의 자화방향을 서로 역방향으로 하고 있는 광자기 기록 매체(D)에 대해서 광빔을 투사하는 수단 및 자계의 영향을 반전시키지 않는 자계를 부여하는 자계발생수단(8)을 포함하는 광자기 기록 장치.
  7. 특허청구의 범위 제 6 항에 있어서, 상기 자계발생수단은 영구자석을 포함하는 광자기 기록 장치.
  8. 단위 기록 매체를 가열하기 위한 가열 수단(ST)와 단위 기록 매체에 자계를 부여하는 자계발생수단을 마련하고, 상기 단위 기록 매체를 가열해서 그 제 2 자성층을 일정방향으로 자화한 단위 기록 매체를 제조하는 스텝, 상기 제조 스텝후의 단위 기록 매체의 자화된 제 2 자성층을 서로 대향시켜서 적층하여 일체화하는 스텝을 포함하는 자기 기록 매체의 제조방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019900013555A 1989-09-05 1990-08-31 광자기 기록 매체, 광자기 기록 장치 및 광자기 기록 매체의 제조방법 Expired - Fee Related KR930009225B1 (ko)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP1-229514 1989-09-05
JP22951489 1989-09-05
JP25927389 1989-10-03
JP1-259273 1989-10-03
JP1-299396 1989-11-16
JP1299396A JPH03205630A (ja) 1989-10-03 1989-11-16 光磁気記録媒体、光磁気記録装置及び光磁気記録媒体の製造方法
JP1-304279 1989-11-21
JP01304279A JP3094029B2 (ja) 1989-09-05 1989-11-21 光磁気記録媒体及び光磁気記録装置

Publications (2)

Publication Number Publication Date
KR910006938A true KR910006938A (ko) 1991-04-30
KR930009225B1 KR930009225B1 (ko) 1993-09-24

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US (2) US5528565A (ko)
KR (1) KR930009225B1 (ko)
NL (1) NL9001950A (ko)

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KR100375360B1 (ko) * 1998-03-30 2003-03-08 카가쿠키쥬쯔 신코지교단 자기기록방법 및 그 자기기록장치
KR100484416B1 (ko) * 2000-11-17 2005-04-22 퓨리메드 주식회사 구기자 추출물을 포함하는 학습능력 및 기억력 향상생약조성물

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JPH1139782A (ja) * 1997-07-16 1999-02-12 Fujitsu Ltd 光ディスクの撓み抑制装置及び光ディスク装置
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KR100484416B1 (ko) * 2000-11-17 2005-04-22 퓨리메드 주식회사 구기자 추출물을 포함하는 학습능력 및 기억력 향상생약조성물

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KR930009225B1 (ko) 1993-09-24
US5528565A (en) 1996-06-18

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