GB2004404A - Optical record disc - Google Patents

Optical record disc

Info

Publication number
GB2004404A
GB2004404A GB7836652A GB7836652A GB2004404A GB 2004404 A GB2004404 A GB 2004404A GB 7836652 A GB7836652 A GB 7836652A GB 7836652 A GB7836652 A GB 7836652A GB 2004404 A GB2004404 A GB 2004404A
Authority
GB
United Kingdom
Prior art keywords
optical record
record disc
information structure
crenellated
reflecting
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.)
Granted
Application number
GB7836652A
Other versions
GB2004404B (en
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Publication of GB2004404A publication Critical patent/GB2004404A/en
Application granted granted Critical
Publication of GB2004404B publication Critical patent/GB2004404B/en
Expired 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
    • G11B7/241—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
    • 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
    • G11B7/257—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • 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
    • 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
    • G11B2007/25408—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 consisting essentially of inorganic materials
    • G11B2007/25414—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 consisting essentially of inorganic materials containing Group 13 elements (B, Al, Ga)
    • 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
    • G11B7/256—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 layers improving adhesion between layers
    • 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
    • G11B7/258—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 reflective layers
    • G11B7/2585—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 reflective layers based on aluminium

Abstract

A transparent disc 1 carries a reflecting crenellated information structure 2 which is bonded to a flat heat- conducting plate 6, for example an aluminium plate, to reduce the amount of local heating, with consequent degradation of the information structure 2, which may be caused by the playback beam. <IMAGE>
GB7836652A 1977-09-16 1978-09-13 Optical record disc Expired GB2004404B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7710162A NL7710162A (en) 1977-09-16 1977-09-16 METHOD FOR MANUFACTURING AN OPTICALLY READABLE INFORMATION DISK USING A FLAT, STIFFENING HEAT CONDUCTIVE PLATE OF INORGANIC MATERIAL

Publications (2)

Publication Number Publication Date
GB2004404A true GB2004404A (en) 1979-03-28
GB2004404B GB2004404B (en) 1982-01-20

Family

ID=19829188

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7836652A Expired GB2004404B (en) 1977-09-16 1978-09-13 Optical record disc

Country Status (20)

Country Link
JP (1) JPS5454003A (en)
AR (1) AR216540A1 (en)
AT (1) AT371278B (en)
AU (1) AU523032B2 (en)
BE (1) BE870476A (en)
BR (1) BR7806005A (en)
CA (1) CA1124396A (en)
CH (1) CH637783A5 (en)
DD (1) DD139774A5 (en)
DE (1) DE2839395A1 (en)
DK (1) DK403478A (en)
ES (1) ES473343A1 (en)
FR (1) FR2403617A1 (en)
GB (1) GB2004404B (en)
IT (1) IT1098622B (en)
MX (1) MX148376A (en)
NL (1) NL7710162A (en)
NZ (1) NZ188406A (en)
SE (1) SE438568B (en)
ZA (1) ZA785080B (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485241A1 (en) * 1980-06-23 1981-12-24 Sharp Kk MAGNETO-OPTICAL MEMORY ELEMENT
EP0128616A1 (en) * 1983-06-02 1984-12-19 Optical Storage International Holland Optical recording element
US4633458A (en) * 1983-06-20 1986-12-30 Polygram Gmbh Disc-shaped, optically-readable information carrier having a protective edge and/or center part
GB2198279A (en) * 1986-10-23 1988-06-08 Nec Corp An optical storage medium
GB2236009A (en) * 1989-08-23 1991-03-20 Glaverbel Optical readable information recording medium
EP0706178A2 (en) * 1994-10-03 1996-04-10 Matsushita Electric Industrial Co., Ltd. Optical information medium, method for producing the optical information medium, and unit for producing the optical information medium
EP0706179A3 (en) * 1994-09-27 1996-08-28 Matsushita Electric Ind Co Ltd Production process of optical information recording medium and production apparatus therefor
US5684778A (en) * 1994-09-27 1997-11-04 Matsushita Electric Industrial Co., Ltd. Initialization process for a phase change recording medium with a zero level drop in flash light emission
EP1184858A2 (en) * 1995-01-27 2002-03-06 Nec Corporation Optical information recording medium and method for optical recording, reproducing and erasing information
US6842409B2 (en) 2001-02-21 2005-01-11 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same
USRE39412E1 (en) 1995-02-15 2006-11-28 Matsushita Electric Industrial Co., Ltd. Optical information medium, and method and apparatus for fabricating the same
US7212489B2 (en) 2001-02-21 2007-05-01 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028498A1 (en) * 1980-07-26 1982-03-04 Röhm GmbH, 6100 Darmstadt IMPROVED, OPTICALLY READED, INFORMATION STORAGE DISKS AND METHOD FOR THEIR PRODUCTION
JPS5766538A (en) * 1980-10-08 1982-04-22 Toshiba Corp Information storage medium
JPS57186241A (en) * 1981-05-11 1982-11-16 Mitsui Toatsu Chem Inc Optical information recording disc
JPS58108044A (en) * 1981-12-22 1983-06-28 Pioneer Electronic Corp Optical disk
JPS61500574A (en) * 1983-12-02 1986-03-27 バロ−ス・コ−ポレ−ション Cost-reduced optical disc record
JPS61214245A (en) * 1985-03-20 1986-09-24 Matsushita Electric Ind Co Ltd Optical information recording medium
JPH061561B2 (en) * 1985-08-21 1994-01-05 株式会社日立製作所 Light disk
JPS6242347A (en) * 1986-07-31 1987-02-24 Sanyo Electric Co Ltd Production of optical disk recorder
JP2742524B2 (en) * 1994-10-03 1998-04-22 松下電器産業株式会社 Optical information medium, optical information medium manufacturing method, and optical information medium manufacturing apparatus
EP1637329A1 (en) 2004-09-15 2006-03-22 Domino Printing Sciences Plc Droplet generator

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485241A1 (en) * 1980-06-23 1981-12-24 Sharp Kk MAGNETO-OPTICAL MEMORY ELEMENT
EP0128616A1 (en) * 1983-06-02 1984-12-19 Optical Storage International Holland Optical recording element
US4633458A (en) * 1983-06-20 1986-12-30 Polygram Gmbh Disc-shaped, optically-readable information carrier having a protective edge and/or center part
GB2198279A (en) * 1986-10-23 1988-06-08 Nec Corp An optical storage medium
GB2198279B (en) * 1986-10-23 1990-09-26 Nec Corp An optical storage medium
GB2236009A (en) * 1989-08-23 1991-03-20 Glaverbel Optical readable information recording medium
EP0706179A3 (en) * 1994-09-27 1996-08-28 Matsushita Electric Ind Co Ltd Production process of optical information recording medium and production apparatus therefor
US5684778A (en) * 1994-09-27 1997-11-04 Matsushita Electric Industrial Co., Ltd. Initialization process for a phase change recording medium with a zero level drop in flash light emission
EP1006518A1 (en) * 1994-09-27 2000-06-07 Matsushita Electric Industrial Co., Ltd. Production process of optical information recording medium and production apparatus thereof
EP0706178A3 (en) * 1994-10-03 1996-08-07 Matsushita Electric Ind Co Ltd Optical information medium, method for producing the optical information medium, and unit for producing the optical information medium
EP0706178A2 (en) * 1994-10-03 1996-04-10 Matsushita Electric Industrial Co., Ltd. Optical information medium, method for producing the optical information medium, and unit for producing the optical information medium
US5876823A (en) * 1994-10-03 1999-03-02 Matsushita Electric Industrial Co., Ltd. Optical information medium, method for producing the optical information medium, and unit for producing the optical information medium
EP1184858A2 (en) * 1995-01-27 2002-03-06 Nec Corporation Optical information recording medium and method for optical recording, reproducing and erasing information
EP1184858A3 (en) * 1995-01-27 2002-05-29 Nec Corporation Optical information recording medium and method for optical recording, reproducing and erasing information
USRE39412E1 (en) 1995-02-15 2006-11-28 Matsushita Electric Industrial Co., Ltd. Optical information medium, and method and apparatus for fabricating the same
US6842409B2 (en) 2001-02-21 2005-01-11 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same
US7102985B2 (en) 2001-02-21 2006-09-05 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same
US7212489B2 (en) 2001-02-21 2007-05-01 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same
US7417941B2 (en) 2001-02-21 2008-08-26 Scratch-Less Disc Industries, Llc Optical disc and method of protecting same

Also Published As

Publication number Publication date
BE870476A (en) 1979-03-14
FR2403617B1 (en) 1983-06-17
DE2839395A1 (en) 1979-03-29
BR7806005A (en) 1979-04-24
AU3982778A (en) 1980-03-20
ES473343A1 (en) 1979-04-16
SE7809614L (en) 1979-03-17
SE438568B (en) 1985-04-22
DK403478A (en) 1979-03-17
GB2004404B (en) 1982-01-20
AT371278B (en) 1983-06-10
CA1124396A (en) 1982-05-25
FR2403617A1 (en) 1979-04-13
AU523032B2 (en) 1982-07-08
MX148376A (en) 1983-04-13
IT1098622B (en) 1985-09-07
ATA667878A (en) 1982-10-15
JPS574973B2 (en) 1982-01-28
NZ188406A (en) 1982-05-31
CH637783A5 (en) 1983-08-15
JPS5454003A (en) 1979-04-27
DD139774A5 (en) 1980-01-16
ZA785080B (en) 1980-04-30
IT7827635A0 (en) 1978-09-13
NL7710162A (en) 1979-03-20
AR216540A1 (en) 1979-12-28

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee