JPS52156605A - Data carrier and method of producing same - Google Patents

Data carrier and method of producing same

Info

Publication number
JPS52156605A
JPS52156605A JP7118877A JP7118877A JPS52156605A JP S52156605 A JPS52156605 A JP S52156605A JP 7118877 A JP7118877 A JP 7118877A JP 7118877 A JP7118877 A JP 7118877A JP S52156605 A JPS52156605 A JP S52156605A
Authority
JP
Japan
Prior art keywords
data carrier
producing same
producing
same
carrier
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP7118877A
Other languages
Japanese (ja)
Inventor
Puyueshiyu Kuroodo
Ru Karubennu Furansua
Mania Anrietsuto
Teiruaaru Mishieru
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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
Application filed by Thomson-Brandt SA filed Critical Thomson-Brandt SA
Publication of JPS52156605A publication Critical patent/JPS52156605A/en
Pending legal-status Critical Current

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
    • G11B7/24015—Air-sandwiched discs
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Optical Recording Or Reproduction (AREA)
JP7118877A 1976-06-18 1977-06-17 Data carrier and method of producing same Pending JPS52156605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7618602A FR2355337A1 (en) 1976-06-18 1976-06-18 Optical read-write system for disc memories - has disc sandwiched between covers to prevent errors due to dust particles or surface scratches (NL 20.12.77)

Publications (1)

Publication Number Publication Date
JPS52156605A true JPS52156605A (en) 1977-12-27

Family

ID=9174600

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7118877A Pending JPS52156605A (en) 1976-06-18 1977-06-17 Data carrier and method of producing same

Country Status (4)

Country Link
JP (1) JPS52156605A (en)
DE (1) DE2727189A1 (en)
FR (1) FR2355337A1 (en)
NL (1) NL7706584A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54179104U (en) * 1978-06-07 1979-12-18
JPS5766539A (en) * 1980-10-09 1982-04-22 Toshiba Corp Optical disk
JPS5766538A (en) * 1980-10-08 1982-04-22 Toshiba Corp Information storage medium
JPS5771247U (en) * 1980-10-17 1982-04-30
JPS5786139A (en) * 1980-09-25 1982-05-29 Rca Corp Optical recording medium
JPS5788537A (en) * 1980-11-19 1982-06-02 Toshiba Corp Optical disc
JPS5788538A (en) * 1980-11-19 1982-06-02 Toshiba Corp Optical disc
JPS5817631U (en) * 1981-07-23 1983-02-03 富士写真フイルム株式会社 optical information recording medium
JPS58143446A (en) * 1982-02-22 1983-08-26 Hitachi Ltd Information recording medium
JPS61111040U (en) * 1985-10-25 1986-07-14
JPS63841A (en) * 1987-06-26 1988-01-05 Sharp Corp Magneto-optical memory element
JPS6323236A (en) * 1987-05-21 1988-01-30 Sanyo Electric Co Ltd Structure of disk record
JPH03205629A (en) * 1990-11-27 1991-09-09 Toshiba Corp Production of optical information recording medium

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4183094A (en) * 1978-03-20 1980-01-08 Xerox Corporation Optical storage medium using the frequency domain
JPS5545166A (en) * 1978-09-25 1980-03-29 Matsushita Electric Ind Co Ltd Recording and reproducing method for optical information
FR2437668A1 (en) * 1978-09-29 1980-04-25 Thomson Csf PROTECTED OPTICAL DISC
CH636467A5 (en) * 1978-10-17 1983-05-31 Mca Disco Vision Method and device for recording a modulated electrical signal
JPS5762831A (en) * 1980-10-02 1982-04-16 Nissan Motor Co Ltd Forging die for part having reverse gradient
DE3176118D1 (en) * 1980-10-09 1987-05-21 Toshiba Kk Data recording medium
JPS5786173A (en) * 1980-11-17 1982-05-29 Toshiba Corp Recorder and reproducer
DE3416607C2 (en) * 1983-05-04 1995-03-16 Matsushita Electric Ind Co Ltd Optical disk and method of making the same
US4538159A (en) * 1984-04-16 1985-08-27 Eastman Kodak Company Ceramic overcoated optical recording element
US4527173A (en) * 1984-04-16 1985-07-02 Eastman Kodak Company Erasable, reusable optical recording element and method
JPS62141661A (en) * 1985-12-16 1987-06-25 Ricoh Co Ltd Optical information recording medium
DE3701801A1 (en) * 1986-01-22 1987-07-23 Ricoh Kk OPTICAL INFORMATION RECORDING MATERIAL
JPH0433553Y2 (en) * 1986-05-30 1992-08-11

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3626386A (en) * 1970-03-05 1971-12-07 Energy Conversion Devices Inc Information storage systems

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54179104U (en) * 1978-06-07 1979-12-18
JPS6037700Y2 (en) * 1978-06-07 1985-11-11 三洋電機株式会社 Structure of disk record
JPS5786139A (en) * 1980-09-25 1982-05-29 Rca Corp Optical recording medium
JPH0427614B2 (en) * 1980-09-25 1992-05-12 Rca Corp
JPS6318252B2 (en) * 1980-10-08 1988-04-18 Tokyo Shibaura Electric Co
JPS5766538A (en) * 1980-10-08 1982-04-22 Toshiba Corp Information storage medium
JPS5766539A (en) * 1980-10-09 1982-04-22 Toshiba Corp Optical disk
JPS5771247U (en) * 1980-10-17 1982-04-30
JPS5788537A (en) * 1980-11-19 1982-06-02 Toshiba Corp Optical disc
JPS5788538A (en) * 1980-11-19 1982-06-02 Toshiba Corp Optical disc
JPS5817631U (en) * 1981-07-23 1983-02-03 富士写真フイルム株式会社 optical information recording medium
JPH0337141Y2 (en) * 1981-07-23 1991-08-06
JPS58143446A (en) * 1982-02-22 1983-08-26 Hitachi Ltd Information recording medium
JPS61111040U (en) * 1985-10-25 1986-07-14
JPS6323236A (en) * 1987-05-21 1988-01-30 Sanyo Electric Co Ltd Structure of disk record
JPH0330217B2 (en) * 1987-05-21 1991-04-26
JPH038023B2 (en) * 1987-06-26 1991-02-05 Sharp Kk
JPS63841A (en) * 1987-06-26 1988-01-05 Sharp Corp Magneto-optical memory element
JPH03205629A (en) * 1990-11-27 1991-09-09 Toshiba Corp Production of optical information recording medium

Also Published As

Publication number Publication date
DE2727189A1 (en) 1977-12-29
FR2355337B1 (en) 1979-03-23
FR2355337A1 (en) 1978-01-13
NL7706584A (en) 1977-12-20

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