ATE172047T1 - Magnetoptisches aufzeichnungsmedium mit der möglichkeit des überschreibens mit zwei oder mehr magnetschichten und dieses medium verwendende aufzeichnungsmethode - Google Patents

Magnetoptisches aufzeichnungsmedium mit der möglichkeit des überschreibens mit zwei oder mehr magnetschichten und dieses medium verwendende aufzeichnungsmethode

Info

Publication number
ATE172047T1
ATE172047T1 AT87306038T AT87306038T ATE172047T1 AT E172047 T1 ATE172047 T1 AT E172047T1 AT 87306038 T AT87306038 T AT 87306038T AT 87306038 T AT87306038 T AT 87306038T AT E172047 T1 ATE172047 T1 AT E172047T1
Authority
AT
Austria
Prior art keywords
medium
magnetic layer
recording
magnetoptical
overwriting
Prior art date
Application number
AT87306038T
Other languages
English (en)
Inventor
Yoichi Osato
Hisaaki Kawade
Eiichi Fujii
Nobuhiro Kasama
Tadashi Kobayashi
Original Assignee
Canon Kk
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 JP61191202A external-priority patent/JPS6348637A/ja
Priority claimed from JP61262034A external-priority patent/JPS63117354A/ja
Priority claimed from JP27856686A external-priority patent/JPH087884B2/ja
Priority claimed from JP27856786A external-priority patent/JPH087885B2/ja
Priority claimed from JP62020384A external-priority patent/JPS63153752A/ja
Priority claimed from JP62021675A external-priority patent/JPS63191337A/ja
Priority claimed from JP62023993A external-priority patent/JPS63191338A/ja
Priority claimed from JP62024707A external-priority patent/JPS63193352A/ja
Priority claimed from JP62024706A external-priority patent/JPS63193351A/ja
Priority claimed from JP62027082A external-priority patent/JPS63195844A/ja
Priority claimed from JP62027083A external-priority patent/JPS63195845A/ja
Priority claimed from JP62037736A external-priority patent/JPS63205835A/ja
Priority claimed from JP62052897A external-priority patent/JPS63220440A/ja
Priority claimed from JP62072559A external-priority patent/JPS63239638A/ja
Priority claimed from JP62070273A external-priority patent/JPS63237236A/ja
Priority claimed from JP62070278A external-priority patent/JPS63237242A/ja
Priority claimed from JP62070279A external-priority patent/JPS63237238A/ja
Priority claimed from JP62070274A external-priority patent/JPS63237237A/ja
Priority claimed from JP62153108A external-priority patent/JPS63316343A/ja
Application filed by Canon Kk filed Critical Canon Kk
Application granted granted Critical
Publication of ATE172047T1 publication Critical patent/ATE172047T1/de

Links

Classifications

    • 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
    • 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
    • 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
    • G11B11/10591—Details for improving write-in properties, e.g. Curie-point temperature
AT87306038T 1986-07-08 1987-07-08 Magnetoptisches aufzeichnungsmedium mit der möglichkeit des überschreibens mit zwei oder mehr magnetschichten und dieses medium verwendende aufzeichnungsmethode ATE172047T1 (de)

Applications Claiming Priority (20)

Application Number Priority Date Filing Date Title
JP15878786 1986-07-08
JP61191202A JPS6348637A (ja) 1986-08-16 1986-08-16 光磁気記録媒体及び光磁気記録方法
JP61262034A JPS63117354A (ja) 1986-11-05 1986-11-05 光磁気記録媒体
JP27856686A JPH087884B2 (ja) 1986-11-25 1986-11-25 光磁気記録方法
JP27856786A JPH087885B2 (ja) 1986-11-25 1986-11-25 光磁気記録方法
JP62020384A JPS63153752A (ja) 1986-07-08 1987-02-02 光磁気記録媒体及びその記録方法
JP62021675A JPS63191337A (ja) 1987-02-03 1987-02-03 光磁気記録媒体及び記録方式
JP62023993A JPS63191338A (ja) 1987-02-04 1987-02-04 光磁気記録媒体及び記録方式
JP62024707A JPS63193352A (ja) 1987-02-06 1987-02-06 光磁気記録媒体の製造方法
JP62024706A JPS63193351A (ja) 1987-02-06 1987-02-06 光磁気記録媒体及び記録方式
JP62027083A JPS63195845A (ja) 1987-02-10 1987-02-10 光磁気記録媒体及び光磁気記録方法
JP62027082A JPS63195844A (ja) 1987-02-10 1987-02-10 光磁気記録媒体及び記録方法
JP62037736A JPS63205835A (ja) 1987-02-23 1987-02-23 光磁気記録媒体及び光磁気記録方法
JP62052897A JPS63220440A (ja) 1987-03-10 1987-03-10 光磁気記録方法
JP62072559A JPS63239638A (ja) 1987-03-26 1987-03-26 光磁気記録装置
JP62070273A JPS63237236A (ja) 1987-03-26 1987-03-26 光磁気記録媒体
JP62070278A JPS63237242A (ja) 1987-03-26 1987-03-26 光磁気記録方式
JP62070279A JPS63237238A (ja) 1987-03-26 1987-03-26 光磁気記録媒体および光磁気記録方法
JP62070274A JPS63237237A (ja) 1987-03-26 1987-03-26 光磁気記録媒体および記録方法
JP62153108A JPS63316343A (ja) 1987-06-18 1987-06-18 光磁気記録媒体

Publications (1)

Publication Number Publication Date
ATE172047T1 true ATE172047T1 (de) 1998-10-15

Family

ID=27586378

Family Applications (2)

Application Number Title Priority Date Filing Date
AT87306038T ATE172047T1 (de) 1986-07-08 1987-07-08 Magnetoptisches aufzeichnungsmedium mit der möglichkeit des überschreibens mit zwei oder mehr magnetschichten und dieses medium verwendende aufzeichnungsmethode
AT98200007T ATE216528T1 (de) 1986-07-08 1987-07-08 Gerät und system zur aufzeichnung auf einem magnetooptischen aufzeichnungsmedium

Family Applications After (1)

Application Number Title Priority Date Filing Date
AT98200007T ATE216528T1 (de) 1986-07-08 1987-07-08 Gerät und system zur aufzeichnung auf einem magnetooptischen aufzeichnungsmedium

Country Status (4)

Country Link
US (1) US5132945A (de)
EP (1) EP0258978B1 (de)
AT (2) ATE172047T1 (de)
DE (1) DE3752222T2 (de)

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AU593364B2 (en) 1990-02-08
DE3752222T2 (de) 1999-03-25
DE3752222D1 (de) 1998-11-12
AU7530687A (en) 1988-01-21
EP0258978B1 (de) 1998-10-07
US5132945A (en) 1992-07-21
EP0258978A3 (de) 1989-07-05
EP0258978A2 (de) 1988-03-09

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