KR920022233A - 광 자기 기록 매체 - Google Patents

광 자기 기록 매체 Download PDF

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Publication number
KR920022233A
KR920022233A KR1019920008184A KR920008184A KR920022233A KR 920022233 A KR920022233 A KR 920022233A KR 1019920008184 A KR1019920008184 A KR 1019920008184A KR 920008184 A KR920008184 A KR 920008184A KR 920022233 A KR920022233 A KR 920022233A
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South Korea
Prior art keywords
layer
magneto
recording
optical recording
recording medium
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KR1019920008184A
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English (en)
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KR100238692B1 (ko
Inventor
신따로 다나까
다까시 시모우마
아리요시 나까오끼
마사히꼬 가네꼬
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오가 노리오
소니 가부시기가이샤
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Priority claimed from JP11184391A external-priority patent/JPH04339338A/ja
Priority claimed from JP12623491A external-priority patent/JPH04351734A/ja
Application filed by 오가 노리오, 소니 가부시기가이샤 filed Critical 오가 노리오
Publication of KR920022233A publication Critical patent/KR920022233A/ko
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Publication of KR100238692B1 publication Critical patent/KR100238692B1/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
    • G11B7/24018—Laminated discs
    • G11B7/24027—Layers; Shape, structure or physical properties thereof
    • 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
    • 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
    • G11B11/10517—Overwriting or erasing
    • G11B11/10519—Direct overwriting, i.e. performing erasing and recording using the same transducing means
    • G11B11/10521—Direct overwriting, i.e. performing erasing and recording using the same transducing means using a single light spot
    • 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
    • G11B11/10589—Details
    • G11B11/10593—Details for improving read-out properties, e.g. polarisation of light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Abstract

내용 없음

Description

광 자기 기록 매체
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 일실시예에 따른 광자기기록매체의 개략적인 확대단면도.
제2도는 광자기기록매체에 사용되는 기록용 레이저의 전력마진을 나타낸 도면.
제3도는 금속층의 두께에 따른 저레벨레이저의 전력변화를 나타낸 도면.
제5도는 금속층의 두께에 따른 저레벨레이저의 전력마진의 변화를 나타낸 도면.
제5도는 광자기기록매체의 메모리층의 두께와 커(Kerr)회전각 사이의 관계를 나타낸 도면.
제6도는 본 발명에 따른 광자기기록매체의 자화상태를 개략적으로 도시한 도면.

Claims (2)

  1. 제1유전체층과, 수직의 자기이방성을 갖는 메모리층과, 평면의 자기이방성 또는 약간 수직의 자기이방성을 갖는 중간층과 수직의 자기이방성을 갖는 기록층과, 제2유전체층과, 금속층과, 보호층이 차례로 적층형성된 광전송기파을 갖추고, 기록된 정보신호에 따라 제1 및 제2열조건으로서, 상기 메모리층의 큐리온도(Tc1)에 근사하거나 더 높고 상기 기록층에서의 자기모멘트를 반전시킬 전도로 높지 않은 온도(T1)로 가열함으로써 얻어지는 제1열조건과, 상기 큐리온도(Tc1)와 동일하거나 그 이상이고 상기 기록층에서의 자기모멘트를 반전시킬 정도로 충분히 높은 온도(T2)로 가열함으로써 얻어지는 제2열조건을 변조하는 단계와, 상기 각 열조건으로부터 냉각시키는 단계로 이루어지는 공정에 의해 정보신호를 기록하도록 자화되는 광자기기록매체로서, 상기 메모리층과, 상기 중간층과, 상기 기록층으로 구성되는 적층막의 전체두께는 1000∼l500Å이고, 상기 제2유전체층의 두께는 500∼1500Å이고, 상기 금속층의 두께는 250∼1500Å인 것을 특징으로 하는 광자기기록매체.
  2. 최소한 메모리층과 기록층이 상호 적층되어 자기적으로 결합된 광자기기록매체에 대한 광자기기록처리에 사용하고, 기록될 정보신호에 따라 제1 및 제2열조건으로서, 상기 메모리층의 큐리온도(Tc1)에 근사하거나 더 높고 상기 기록층에서의 자기모멘트를 반전시킬 정도로 높지 않은 온도(T1)로 가열함으로써 얻어지는 제1열조건과, 상기 큐리온도(Tc1)와 동일하거나 그 이상이고 상기 기록층에서의 자기모멘트를 반전시킬 정도로 충분히 높은 온도(T2)로 가열함으로써 얻어지는 제2열조건을 변조하는 단계와, 상기 각 열조건으로부터 냉각시키는 단계로 이루어지는 공정에 이해 상기 기록매체에 자화의 형태로 기록을 행하는 광자기기록매체로서, 상기 광자기기록매체의 상기 메모리층의 두께는 20∼70nm의 범위인 것을 특징으로 하는 광자기기록매체.
    ※ 참고사항 : 최초출원 내용에 의하여 공개되는 것임.
KR1019920008184A 1991-05-16 1992-05-15 광자기기록매체 KR100238692B1 (ko)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP91-111843 1991-05-16
JP11184391A JPH04339338A (ja) 1991-05-16 1991-05-16 光磁気記録媒体
JP91-126434 1991-05-29
JP12623491A JPH04351734A (ja) 1991-05-29 1991-05-29 光磁気記録媒体

Publications (2)

Publication Number Publication Date
KR920022233A true KR920022233A (ko) 1992-12-19
KR100238692B1 KR100238692B1 (ko) 2000-03-02

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KR1019920008184A KR100238692B1 (ko) 1991-05-16 1992-05-15 광자기기록매체

Country Status (6)

Country Link
US (1) US6132862A (ko)
EP (1) EP0513668B1 (ko)
KR (1) KR100238692B1 (ko)
AT (1) ATE169145T1 (ko)
CA (1) CA2067945C (ko)
DE (1) DE69226399T2 (ko)

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JP2999895B2 (ja) * 1992-12-10 2000-01-17 シャープ株式会社 光磁気記録媒体
US5662988A (en) * 1993-01-22 1997-09-02 Sharp Kabushiki Kaisha Magneto-optical recording medium
JP2954440B2 (ja) * 1993-01-22 1999-09-27 シャープ株式会社 光磁気記録媒体および光磁気記録方法
JPH06251443A (ja) * 1993-02-25 1994-09-09 Sharp Corp 光磁気記録媒体
JPH0714231A (ja) * 1993-06-29 1995-01-17 Sharp Corp 光磁気ディスク、光ピックアップ及び光磁気ディスク装置
US5644566A (en) * 1994-05-24 1997-07-01 Sharp Kabushiki Kaisha Magneto-optical recording medium
JPH09120595A (ja) * 1995-10-23 1997-05-06 Sharp Corp 光磁気記録媒体
US5903526A (en) * 1996-09-20 1999-05-11 Victor Company Of Japan, Ltd. Magneto-optical recording medium having multiple magnetic layers
US6802073B1 (en) * 1999-06-11 2004-10-05 Tosoh Corporation Magneto-optical recording medium
DE102006004874A1 (de) * 2006-02-03 2007-08-09 Robert Bosch Gmbh Sensorvorrichtung für Fahrzeuge

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DE3752222T2 (de) * 1986-07-08 1999-03-25 Canon Kk Magnetoptisches Aufzeichnungsmedium mit der Möglichkeit des Überschreibens mit zwei oder mehr Magnetschichten und dieses Medium verwendende Aufzeichnungsmethode
JPS6352355A (ja) * 1986-08-20 1988-03-05 Sony Corp 熱磁気記録方法
JPS6352354A (ja) * 1986-08-20 1988-03-05 Sony Corp 熱磁気記録方法
KR970002341B1 (ko) * 1987-11-30 1997-03-03 소니 가부시끼가이샤 자기 광 기록 매체의 신호 재생 방법
JP2805070B2 (ja) * 1988-10-28 1998-09-30 ソニー株式会社 熱磁気記録方法
CA1326547C (en) * 1988-07-13 1994-01-25 Masahiko Kaneko Thermomagnetic recording method
JP2829970B2 (ja) * 1988-07-13 1998-12-02 ソニー株式会社 熱磁気記録媒体
JPH02254648A (ja) * 1989-03-28 1990-10-15 Seiko Epson Corp 光磁気ディスク
JP2814601B2 (ja) * 1989-08-30 1998-10-27 ソニー株式会社 光磁気記録媒体
JP3038853B2 (ja) * 1990-09-13 2000-05-08 株式会社ニコン 高レベルのマージンが拡大したオーバーライト可能な光磁気記録媒体

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Publication number Publication date
US6132862A (en) 2000-10-17
EP0513668A1 (en) 1992-11-19
CA2067945A1 (en) 1992-11-17
KR100238692B1 (ko) 2000-03-02
EP0513668B1 (en) 1998-07-29
CA2067945C (en) 2001-09-04
ATE169145T1 (de) 1998-08-15
DE69226399T2 (de) 1999-03-25
DE69226399D1 (de) 1998-09-03

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