KR900008471A - 광자기 디스크 - Google Patents

광자기 디스크 Download PDF

Info

Publication number
KR900008471A
KR900008471A KR1019890016032A KR890016032A KR900008471A KR 900008471 A KR900008471 A KR 900008471A KR 1019890016032 A KR1019890016032 A KR 1019890016032A KR 890016032 A KR890016032 A KR 890016032A KR 900008471 A KR900008471 A KR 900008471A
Authority
KR
South Korea
Prior art keywords
magneto
film
optical disk
optical
recording
Prior art date
Application number
KR1019890016032A
Other languages
English (en)
Inventor
후미요시 기시노
하루까즈 미야모또
시게노리 오까미네
노리유끼 오기하라
마사히꼬 다까하시
노리오 오따
도시오 니이하라
Original Assignee
미다 가쓰시게
가부시끼가이샤 히다찌 세이사꾸쇼
와따나베 히로시
히다찌마꾸세루 가부시끼가이샤
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
Priority claimed from JP63279235A external-priority patent/JP2702996B2/ja
Priority claimed from JP30605188A external-priority patent/JPH02152049A/ja
Priority claimed from JP63306053A external-priority patent/JP2997471B2/ja
Priority claimed from JP4301189A external-priority patent/JPH02226531A/ja
Application filed by 미다 가쓰시게, 가부시끼가이샤 히다찌 세이사꾸쇼, 와따나베 히로시, 히다찌마꾸세루 가부시끼가이샤 filed Critical 미다 가쓰시게
Publication of KR900008471A publication Critical patent/KR900008471A/ko

Links

Classifications

    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
    • 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
    • G11B11/1053—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 to compensate for the magnetic domain drift or time shift
    • 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
    • G11B11/10586—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
    • 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
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature
    • 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
    • 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
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B7/2433—Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
    • 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
    • G11B11/10508—Recording by modulating only the magnetic field at 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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)

Abstract

내용 없음.

Description

광자기 디스크
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도, 제11도, 제13도, 제15도, 제20도는 광자기 디스크의 단면구조를 도시한 모식도.
제2도, 제4도 및 제5도, 제7도, 제9도는 기록/재생/소거를 반복하였을 때의 재생신호 출력의 변화를 도시한 도면.
제3도, 제6도, 제10도, 제17도, 제21도는 재생신호 출력의 기록 레이저 파워의존성을 나타낸 도면.

Claims (38)

  1. 레이저 광을 사용해서 기록, 재생 또는 소거를 실행하는 광디스크에 있어서, 디스크 기판(1)상에 제1유전체막(2), 광자기 기록막(3), 제2유전체막(4), 그리고 금속보호막(5)로 되는 4층 구조의 막을 마련하고, 상기 금속보호막을 마련하는 것에 의해 광자기 기록막에서의 열흐름을 발생시키는 것을 특징으로 하는 광자기 디스크.
  2. 특허청구의 범위 제1항에 있어서, Al, Au, Pt, Rh, Pd및 Cu에서 선택되는 적어도 1종류의 원소를 주체로하는 금속보호막 재료를 선택해서 열확산율을 제어하는 것을 특징으로 하는 광자기 디스크.
  3. 특허청구의 범위 제1항에 있어서, 또 주체원소 이외의 원소를 첨가, 또는 Ni, Nb, Ta, Ti, Zr, Co, Mn에서 선택되는 적어도 1종류의 원소를 1 ∼30at% 첨가하고, 그 농도를 조정해서 금속보호막의 열확산을 제어하는 것을 특징으로 하는 광자기 디스크.
  4. 특허청구의 범위 제1항에 있어서, 상기 금속보호막의 두께를 조정해서 상기 금속 보호막의 열확산율을 제어 하는 것을 특징으로 하는 광자기 디스크.
  5. 레이저 광을 사용해서 기록, 재생 또는 소거를 실행하는 광디스크에 있어서, 디스크 기판상에 제1유전체막, 광자기 기록막, 제2유전체막, 그리고 금속보호막으로 되는 4층 구조의 막을 마련하고, 상기 광자기 기록막의 막두께를 조정해서 광자기 기록막의 온도분포를 제어한 것을 특징으로 하는 광자기 디스크.
  6. 레이저 광을 사용해서 기록, 재생 또는 소거를 실행하는 광디스크에 있어서, 디스크 기판상에 제1유전체막, 광자기 기록막, 제2유전체막, 그리고 금속보호막으로 되는 4층 구조의 막을 마련하고, 상기 금속보호막으로써 상기 제2유전체막측에 고반사율 재료를, 그리고 그 반대측에 고내식성 재료를 이용한 2층으로 되는 금속보호막을 사용한 것을 특징으로 하는 광자기 디스크.
  7. 특허청구의 범위 제6항에 있어서, 상기 고반사율 재료와 고 내식성 재료 사이에는 양원소의 조성의 경사를 마련한 것을 특징으로 하는 광자기 디스크.
  8. 특허청구의 범위 제6항에 있어서, 상기 고반사율 재료로서, Al, Cu, Rh, Pd, Au 및 Bt에서 선택되는 적어도 1종류의 원소를 사용하고, 고내식성 재료로써 Co, Ti, Ta, Nb, Cr, Ni, Zr 및 Mn에서 선택되는 적어도 1 종류의 원소를 사용하여 그 농도는 원자조성 비 합계가 30at%를 넘지않는 것을 특징으로 하는 광자기 디스크.
  9. 기판상에 적층된 광자기 기록매체 상에 광빔을 집광하여 연속적으로 조사하고, 상기 광빔이 매체에 대하여 상대적으로 이동하고, 동시에 상기 광자기 기록막에 변조자계를 인가하는 것에 의해 기록자구를 형성하여 정보를 기록하는 광자기 기록매체에 있어서, 상기 기록자구의 형상의 제어를 상기 광자기 기록막의 열확산율을 제어하는 것에 의해 실행하는 것을 특징으로 하는 광자기 디스크.
  10. 특허청구의 범위 제9항에 있어서, 상기 기록자구의 돌기의 상기 광빔의 이동방향의 길이가 상기 기록자구의 상기 광 빔의 이동과 수직인 방향의 폭의 0.7배 보다 짧은 것을 특징으로 하는 광자기 디스크.
  11. 특허청구의 범위 제9항에 있어서, 상기 광자기 기록막은 적어도 자성막과 금속막으로 된 것을 특징으로하는 광자기 디스크.
  12. 특허청구의 범위 제9항에 있어서, 상기 광자기 기록막은 적어도 상기 자성막과 상기 금속막의 사이에 유전체막을 갖는 구조인 것을 특징으로 하는 광자기 디스크.
  13. 특허청구의 범위 제11항 또는 제12항에 있어서, 상기 금속막의 열확산을 KM, 상기 광빔의 이동 속도를 V, 상기 광빔이 겁광된 광스포트의 직경을 D라고 할때 KM>V · D인 관계가 성립하고 있는 것을 특징으로 하는 광자기 디스크.
  14. 특허청구의 범위 제12항에 있어서, 상기 유전체막의 열확산율 KD가 상기 금속막의 열화산을 KM보다 작은 것을 특징으로 하는 광자기 디스크.
  15. 특허청구의 범위 제11항 또는 제12항에 있어서, 상기 자성막의 열화산율 KR과 막두께 ℓK의 곱이 상기 금속막의 열화산율 KM과 막두께 ℓM의 곱보다 작은 것을 특징으로 하는 광자기 디스크.
  16. 특허청구의 범위 제12항에 있어서, 상기 유전체막의 열확산율 KD과 막두께를 ℓD상기 광빔의 이동속도를 v, 상기 광스포트의 직경을 D라고 할때, KD〉인것을 특징으로 하는 광자기 디스크.
  17. 특허청구의 범위 제9항에 있어서, 상기 금속막의 열확산율이 상기 자성막의 열화산율보다 큰것을 특징으로하는 광자기 디스크.
  18. 특허청구의 범위 제12항에 있어서, 상기 유전체막이 AlNx, SiNx, ZrOx, SiOx, TaOx, ZnSx, ZnOx, TiOx, Y2O3, Sm2O3중의 1종류 또는 2종류 이 상의 혼합물 또는 화합물로 되 는 것을 특징으로 하는 광자기 디스크.
  19. 특허청구의 범위 제9항에 있어서, 상기 광자기 디스크의 재생신호 강도가 광파워에 대해서 포화한 후, 높은 파워에 대해서도 일정한 포화값을 유지하는 것을 특징으로 하는 광자기 디스크.
  20. 레이저 광을 사용해서 기록, 재생 또는 소거를 실행하는 광디스크에 있어서, 그 구조가 오목블록의 안내홈을 갖는 기판상에 무기화할물의 제1유전체막, 기록막, 무기화할물의 제2유전체막, 그리고 금속막의 4층이고, 기록막과 금속막 사이의 무기화합물의 유전체막에 광의 다중간섭 효과를 부여한 것을 특징으로 하는 광자기 디스크.
  21. 특허청구의 범위 제20항에 있어서, 상기 기록막과 상기 금속막 사이에 마련하는 무기화합물의 제2유전체막에서 상기 무기화합물로 되는 유전체막의 굴절률이 유전체막과 인접하는 막의 굴절률과 비교해서 그 차가 0.4이상이 것을 특징으로 하는 광자기 디스크.
  22. 특허청구의 범위 제20항에 있어서, 상기 기록막 재료로써 수직 자기 이방성을 갖는 재료를 사용하고, 더욱 바람직하게는 희토류원소와 철족원소로 구성되는 합금을 사용한 것을 특징으로 하는 광자기 디스크.
  23. 특허청구의 범위 제20항에 있어서, 상기 기록막 재료에서 Gd, Tb, Dy, Ho중에서 선택되는 적어도 1종류 또는 2종류와 Fe, Co중의 어느 한쪽 또는 양쪽으로 구성되는 합금을 사용한 것을 특징으로 하는 광자기 디스크.
  24. 특허청구의 범위 제20항에 있어서, 상기 기록막 재료로써 Gd, Tb, Dy, Ho중에서 선택되는 적어도 1종류 또는 2종류, Nd, Pr, Ce, Sm중에서 선택되는 적어도 1종류, 더나아가서는 Fe와 Co중의 어느 한쪽 또는 양쪽으로 구성되는 합금을 사용한 것을 특징으로 하는 광자기 디스크.
  25. 특허청구의 범위 제20항에 있어서, 상기 기록막에서 그 두께가 50nm이하인 것을 특징으로 하는 광자기 디스크.
  26. 특허청구의 범위 제20항에 있어서, 상기 기록막에서 Nb, Ti, Ta, Cr 중에서 선택되는 적어도 1종류의 원소를 1at% 이상 8at% 이하로 포함한 재료를 사용한 것을 특징으로 하는 광자기 디스크.
  27. 특허청구의 범위 제20항에 있어서, 상기 기록막에서 Nb, Ti, Ta, Cr 중에서 선택되는 적어도 1종류의 원소와 Pt, Pd, Rh, Au중에서 선택되는 적어도 1종류의 원소를 합쳐서 1at%이상 15at%이하로 포함한 재료를 사용한 것을 특징으로 하는 광자기 디스크.
  28. 레이저 광을 사용해서 기록, 재생 또는 소거를 실행하는 광자기 기록에서 오목블록의 안내홈을 갖는 디스크 기판에 광자기 기록막 제2유전체막 및 금속막순으로 3층을 순차 적층한 층구조를 갖는 것을 특징으로 하는 광자기 디스크.
  29. 특허청구의 범위 제28항에 있어서, 상기 광자기 기록막으로써 희토류원소와 철족원소를 주체로한 합금을 사용하고, 더 바람직하게는 그 합금이 비정질인 것을 특징으로 하는 광자기 디스크.
  30. 특허청구의 범위 제27항에 있어서, 상기 희토류원소로써 Dy, Ho, Tb, Gd, Nd, Pr, Sm중에서 선택되는 적어도 1종류 또는 2종류의 원소, 상기 철족원소로써 Fe, Co중에서 선택되는 적어도 1종류 또는 2종류의 원소를 주체로 하는 합금을 사용하고, 더 바람직하게는 그 합금이 비정질인 것을 특징으로 하는 광자기 디스크.
  31. 특허청구의 범위 제28항에 있어서, 상기 희토류원소와 철족원소를 주체로 한 광자기 기록 재료중에 Cr, Ti. Ta, Nb, Aℓ 중에서 선택되는 적이도 1종류의 원소와 Pt, Pd, Rh, Au 중서 선택되는 적어로 1 종류의 원소중의 어느 한쪽 또는 양쪽의 원소를 포함한 것을 특징으로 하는 광자기 디스크.
  32. 특허청구의 범위 제28항에 있어서, 상기 제2유전체막에 사용하는 재료의 재질, 더구체적으로는 그 열화산율을 제어하는 것에 의해 광자기 기록막의 온도 분포를 변경하고, 디스크의 기록이나 소거의 감도를 조정한 것을 특징으로 하는 광자기 디스크.
  33. 특허청구의 범위 제28항에 있어서, 상기 금속막으로써 Aℓ, Cu, Pt, Rh를 주체로한 원소 또는 이들 금속의 합금을 사용하고, 더 바람직하게는 이들 금속막이 비정질인 것을 특징으로 하는 광자기 디스크.
  34. 특허청구의 범위 제33항에 있어서, 상기 금속막으로써 Ni, Ti, Ta, Cr, Nb, Zr, Si중에서 선택되는 적어로 1종류 또는 2종류 이상의 원소를 0.5at% 이상 40at%이하 포함인 것을 특징으로 하는 광자기 디스크.
  35. 특허청구의 범위 제28항에 있어서, 상기 금속막에서, 그 재료의 재질, 더 나아가서는 그 열화산율을 제어하는 것에 의해 광자기 기록막의 온도분포를 변경하고, 디스크의 기록이나 소거의 감도를 조정한 것을 특징으로하는 광자기 디스크.
  36. 특허청구의 범위 제28항에 있어서, 상기 광자기 기록막에서 상기 기록막의 어느 한쪽 또는 양쪽의 경계면 근방에 질화물층을 마련하고, 더 바람직하게는 그 두께가 30Å이상인 것을 특징으로 하는 광자기 디스크.
  37. 특허청구의 범위 제28항에 있어서, 상기 광자기 기록막의 재료로써 희토류원소와 철족원소의 합금계에 첨가하는 원소의 총량을 0.5at%이상 15at%이하의 농도로 한 것을 특징으로 하는 광자기 디스크.
  38. 특허청구의 범위 제28항에 있어서, 자계변조 방식에 의해 정보의 기록이 이루어지는 것을 특징으로 하는 광자기 디스크.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019890016032A 1988-11-07 1989-11-06 광자기 디스크 KR900008471A (ko)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP63-279235 1988-11-07
JP63279235A JP2702996B2 (ja) 1988-11-07 1988-11-07 光磁気記録媒体及び光磁気記録方法
JP63-306053 1988-12-05
JP63-306051 1988-12-05
JP30605188A JPH02152049A (ja) 1988-12-05 1988-12-05 光磁気デイスクの構造
JP63306053A JP2997471B2 (ja) 1988-12-05 1988-12-05 光磁気デイクス
JP63-043011 1988-12-27
JP4301189A JPH02226531A (ja) 1989-02-27 1989-02-27 光デイスクの構造

Publications (1)

Publication Number Publication Date
KR900008471A true KR900008471A (ko) 1990-06-04

Family

ID=27461301

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019890016032A KR900008471A (ko) 1988-11-07 1989-11-06 광자기 디스크

Country Status (4)

Country Link
US (1) US5654058A (ko)
EP (1) EP0368194B1 (ko)
KR (1) KR900008471A (ko)
DE (1) DE68928712T2 (ko)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010029133A (ko) * 1999-09-29 2001-04-06 윤종용 상변화 광디스크
KR100368849B1 (ko) * 1993-10-19 2003-06-02 코닌클리케 필립스 일렉트로닉스 엔.브이. 표시장치
KR100472817B1 (ko) * 2001-12-07 2005-03-10 마츠시타 덴끼 산교 가부시키가이샤 정보기록 매체와 그 제조 방법

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2558011B2 (ja) 1990-01-31 1996-11-27 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン 磁気光学記憶媒体
DE4023884A1 (de) * 1990-07-27 1992-01-30 Hoechst Ag Magnetooptisches aufzeichnungsmedium
DE69130441T2 (de) * 1990-08-07 1999-04-08 Hitachi Maxell Magnetooptischer Aufzeichnungsträger
JPH04106744A (ja) * 1990-08-28 1992-04-08 Nikon Corp 低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
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
CA2060549C (en) * 1991-02-08 2002-08-13 Masumi Ohta Magneto-optical recording medium
US5500301A (en) 1991-03-07 1996-03-19 Kabushiki Kaisha Kobe Seiko Sho A1 alloy films and melting A1 alloy sputtering targets for depositing A1 alloy films
JP2839783B2 (ja) * 1991-04-17 1998-12-16 シャープ株式会社 光磁気記録媒体、再生装置及び再生方法
EP0818783A3 (en) * 1991-07-16 1999-04-14 Canon Kabushiki Kaisha Magneto optical recording medium and method
EP0531808B1 (en) * 1991-09-09 1997-02-05 Shin-Etsu Chemical Co., Ltd. Magneto-optical recording medium
JP2664330B2 (ja) * 1993-09-02 1997-10-15 富士通株式会社 光磁気記録媒体
DE69500790T2 (de) * 1994-05-26 1998-04-09 Teijin Ltd Optisches Aufzeichnungsmedium
KR0183938B1 (ko) 1995-10-28 1999-04-15 삼성전자주식회사 비정질 경희토류-천이금속과 반금속의 합금,이로부터 형성되는 광자기 기록막 및 이 기록막을 채용한 광자기 디스크
US6243350B1 (en) * 1996-05-01 2001-06-05 Terastor Corporation Optical storage systems with flying optical heads for near-field recording and reading
JP3738523B2 (ja) * 1997-04-09 2006-01-25 株式会社ニコン 記録可能な光ディスク
US6587427B1 (en) * 1998-06-01 2003-07-01 Terastor Corporation Magneto-optical recording medium
US6449239B1 (en) * 1998-11-25 2002-09-10 Matsushita Electric Industrial Co., Ltd. Optical information recording medium with thermal diffusion layer
US7666579B1 (en) * 2001-09-17 2010-02-23 Serenity Technologies, Inc. Method and apparatus for high density storage of analog data in a durable medium
US20050112019A1 (en) * 2003-10-30 2005-05-26 Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel, Ltd.) Aluminum-alloy reflection film for optical information-recording, optical information-recording medium, and aluminum-alloy sputtering target for formation of the aluminum-alloy reflection film for optical information-recording

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5720933A (en) * 1980-07-14 1982-02-03 Toshiba Corp Information recording carrier
US4466035A (en) * 1982-02-25 1984-08-14 Xerox Corporation Magneto-optic media and system optimization
JPS6040543A (ja) * 1983-08-15 1985-03-02 Ulvac Corp 光磁気記録体
CA1224270A (en) * 1983-09-16 1987-07-14 Junji Hirokane Magneto-optic memory element
JPS60209942A (ja) * 1984-04-02 1985-10-22 Canon Inc 熱磁気記録媒体
US4719137A (en) * 1984-04-13 1988-01-12 Sharp Kabushiki Kaisha Magneto-optic memory element
DE3581924D1 (de) * 1985-02-14 1991-04-04 Toshiba Kawasaki Kk Zum wiederaufzeichnen geeignete magnetooptische platte.
JPH0697514B2 (ja) * 1985-02-21 1994-11-30 シャープ株式会社 磁気光学記憶素子
KR870006535A (ko) * 1985-02-27 1987-07-13 나가이 아쯔시 광자기 기록 매체
JPH0782670B2 (ja) * 1985-07-12 1995-09-06 株式会社日立製作所 光磁気記録媒体
JPH0719396B2 (ja) * 1985-12-09 1995-03-06 ソニー株式会社 情報記録媒体
US4786559A (en) * 1985-12-25 1988-11-22 Sharp Kabushiki Kaisha Magnetooptical storage element
JPH0789414B2 (ja) * 1986-01-31 1995-09-27 シャープ株式会社 光学記憶素子
JPS62293539A (ja) * 1986-06-12 1987-12-21 Konica Corp 光磁気記録媒体
JPS62293541A (ja) * 1986-06-12 1987-12-21 Konica Corp 光磁気記録媒体
US4839883A (en) * 1986-06-30 1989-06-13 Matsushita Electric Ind. Co., Ltd. Optical information recording medium
JPS6378357A (ja) * 1986-09-19 1988-04-08 Fujitsu Ltd 光記憶装置
JPS62295238A (ja) * 1987-05-20 1987-12-22 Sharp Corp 磁気光学記憶素子

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100368849B1 (ko) * 1993-10-19 2003-06-02 코닌클리케 필립스 일렉트로닉스 엔.브이. 표시장치
KR20010029133A (ko) * 1999-09-29 2001-04-06 윤종용 상변화 광디스크
KR100472817B1 (ko) * 2001-12-07 2005-03-10 마츠시타 덴끼 산교 가부시키가이샤 정보기록 매체와 그 제조 방법

Also Published As

Publication number Publication date
DE68928712D1 (de) 1998-07-23
US5654058A (en) 1997-08-05
EP0368194A2 (en) 1990-05-16
EP0368194B1 (en) 1998-06-17
DE68928712T2 (de) 1998-10-15
EP0368194A3 (en) 1992-03-04

Similar Documents

Publication Publication Date Title
KR900008471A (ko) 광자기 디스크
JP3781823B2 (ja) 光磁気記録媒体及びその再生方法
US7069568B2 (en) Record head for thermally assisted magnetic recording
KR950004150A (ko) 광-자기 기록 매체
KR0168626B1 (ko) 정보의 열자기적 기록 및 기억의 정보의 광학적 판독 방법과, 그 방법에 사용하기 적합한 기록 소자 및 기록 소자 제조방법
US6200673B1 (en) Magneto-optical recording medium
JP3159742B2 (ja) 光磁気記録再生方法
CN100533566C (zh) 光记录媒体、磁光记录媒体、信息记录/再生装置、信息记录/再生方法及磁记录装置
JP3424806B2 (ja) 光磁気記録媒体に記録された情報の再生方法
US6118736A (en) Magneto-optical recording medium having a reading layer in which transferred recording marks are extended
KR890004284A (ko) 광자기 기록 매체
US6120921A (en) Magneto-optical recording medium
JP2604475B2 (ja) 光磁気記録媒体
JPH10312594A (ja) 光磁気記録媒体
JPH05205313A (ja) 高耐久性光記録媒体
JP3673881B2 (ja) 光磁気記録媒体及びその再生方法
JP3390713B2 (ja) 光磁気記録媒体
JP3334146B2 (ja) 光学ヘッド装置
JP2006294249A (ja) 光情報媒体
KR100667116B1 (ko) 광 기록 매체, 광 자기 기록 매체, 정보 기록/재생 방법 및 자기 기록 장치
JP3109927B2 (ja) 光磁気記録媒体
JPH0612715A (ja) 光磁気記録媒体とそれを用いた記録再生または消去方法および装置
JP3794596B2 (ja) 光磁気記録媒体
JPH06103623A (ja) 光磁気ディスク
JPH04179104A (ja) 光磁気記録膜の構造

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application
J201 Request for trial against refusal decision
J301 Trial decision

Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 19980610

Effective date: 19990130