ATE169145T1 - Magneto-optischer aufzeichnungsträger - Google Patents

Magneto-optischer aufzeichnungsträger

Info

Publication number
ATE169145T1
ATE169145T1 AT92107730T AT92107730T ATE169145T1 AT E169145 T1 ATE169145 T1 AT E169145T1 AT 92107730 T AT92107730 T AT 92107730T AT 92107730 T AT92107730 T AT 92107730T AT E169145 T1 ATE169145 T1 AT E169145T1
Authority
AT
Austria
Prior art keywords
layer
recording
recording medium
magnetic anisotropy
magneto
Prior art date
Application number
AT92107730T
Other languages
English (en)
Inventor
Shintaro Tanaka
Takahashi Shimouma
Ariyoshi Nakaoki
Masahiko Kaneko
Original Assignee
Sony 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
Priority claimed from JP11184391A external-priority patent/JPH04339338A/ja
Priority claimed from JP12623491A external-priority patent/JPH04351734A/ja
Application filed by Sony Corp filed Critical Sony Corp
Application granted granted Critical
Publication of ATE169145T1 publication Critical patent/ATE169145T1/de

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
    • G11B7/24018—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
AT92107730T 1991-05-16 1992-05-07 Magneto-optischer aufzeichnungsträger ATE169145T1 (de)

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
ATE169145T1 true ATE169145T1 (de) 1998-08-15

Family

ID=26451148

Family Applications (1)

Application Number Title Priority Date Filing Date
AT92107730T ATE169145T1 (de) 1991-05-16 1992-05-07 Magneto-optischer aufzeichnungsträger

Country Status (6)

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

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2999895B2 (ja) * 1992-12-10 2000-01-17 シャープ株式会社 光磁気記録媒体
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
US5662988A (en) * 1993-01-22 1997-09-02 Sharp Kabushiki Kaisha Magneto-optical recording medium
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

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE172047T1 (de) * 1986-07-08 1998-10-15 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
DE3889203T2 (de) * 1987-11-30 1994-11-03 Sony Corp Methode zum optischen Abtasten eines Signals aus einem magneto-optischen Speichermedium.
JP2829970B2 (ja) * 1988-07-13 1998-12-02 ソニー株式会社 熱磁気記録媒体
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
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

Also Published As

Publication number Publication date
US6132862A (en) 2000-10-17
DE69226399D1 (de) 1998-09-03
KR100238692B1 (ko) 2000-03-02
CA2067945C (en) 2001-09-04
EP0513668A1 (de) 1992-11-19
KR920022233A (ko) 1992-12-19
CA2067945A1 (en) 1992-11-17
EP0513668B1 (de) 1998-07-29
DE69226399T2 (de) 1999-03-25

Similar Documents

Publication Publication Date Title
US5656385A (en) Magnetic recording medium and information recording-reproduction method using the same
KR920013320A (ko) 광자기 기록매체
KR930003043A (ko) 광자기기록방식 및 이 방식에 사용되는 광자기기록매체
KR940018825A (ko) 광자기 기록 재생 장치(magneto-optical recording and reproducing device)
EP0974961A3 (de) Magnetooptischer Aufzeichnungsträger und Verfahren zur Aufzeichnung und Wiedergabe und für den magnetooptischen Aufzeichnungsträger ausgebildetes optische Kopf
CA2135986A1 (en) Optical Information Recording/Reproducing Apparatus and Method with Function of Adjusting Reproducing Power
JP3111479B2 (ja) 光磁気記録媒体
ATE169145T1 (de) Magneto-optischer aufzeichnungsträger
KR950004143A (ko) 광자기 기록 매체 및 그 매체의 기록 재생 방법
JP3106514B2 (ja) 光磁気記録再生方法
CA2073320A1 (en) Magneto-optical recording medium
DE60239043D1 (de) Optisches aufzeichnungsmedium
JPH09198731A (ja) 光磁気記録媒体
EP0347882A3 (de) Magnetooptischer Aufzeichnungsträger, geeignet zum Überschreiben
JPH11195252A (ja) 光磁気記録媒体
KR920017034A (ko) 광자기기록매체
KR960011893A (ko) 단파장용 광자기 디스크
KR940007797A (ko) 오버라이트가능한 광기록 매체 및 그의 기록 방법
JP2604475B2 (ja) 光磁気記録媒体
JPS6314343A (ja) 情報記録媒体
KR950012343A (ko) 광자기 기록매체
KR950001881B1 (ko) 광자기 기록매체 구조
JPS63122031A (ja) 光記録媒体
KR930009223B1 (ko) 광자기 디스크의 구조
KR0176748B1 (ko) 광자기기록매체

Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee