DE3484037D1 - Aufzeichnungselement fuer eine information. - Google Patents

Aufzeichnungselement fuer eine information.

Info

Publication number
DE3484037D1
DE3484037D1 DE8484305598T DE3484037T DE3484037D1 DE 3484037 D1 DE3484037 D1 DE 3484037D1 DE 8484305598 T DE8484305598 T DE 8484305598T DE 3484037 T DE3484037 T DE 3484037T DE 3484037 D1 DE3484037 D1 DE 3484037D1
Authority
DE
Germany
Prior art keywords
information
recording element
recording
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.)
Expired - Lifetime
Application number
DE8484305598T
Other languages
English (en)
Inventor
Motoyasu Terao
Yasushi Miyauchi
Kazuo Shigematsu
Shinkichi Horigome
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 Hitachi Ltd filed Critical Hitachi Ltd
Application granted granted Critical
Publication of DE3484037D1 publication Critical patent/DE3484037D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/257—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
    • G11B7/241—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
    • 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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0055—Erasing
    • G11B7/00557—Erasing involving phase-change media
    • 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
    • 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
    • G11B2007/24302—Metals or metalloids
    • G11B2007/24316—Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
    • 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
    • G11B2007/24318—Non-metallic elements
    • G11B2007/2432—Oxygen
    • 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
    • G11B2007/25705—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 consisting essentially of inorganic materials
    • G11B2007/25708—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 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
    • G11B7/257—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
    • G11B2007/25705—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 consisting essentially of inorganic materials
    • G11B2007/2571—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 consisting essentially of inorganic materials containing group 14 elements except carbon (Si, Ge, Sn, Pb)
    • 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
    • G11B2007/25705—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 consisting essentially of inorganic materials
    • G11B2007/25715—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 consisting essentially of inorganic materials containing oxygen
    • 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
    • G11B7/2572—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 consisting essentially of organic materials
    • 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
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146—Laser beam
    • 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
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/165—Thermal imaging composition

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
DE8484305598T 1983-08-19 1984-08-17 Aufzeichnungselement fuer eine information. Expired - Lifetime DE3484037D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58150148A JPS6042095A (ja) 1983-08-19 1983-08-19 情報の記録用部材およびその製造方法

Publications (1)

Publication Number Publication Date
DE3484037D1 true DE3484037D1 (de) 1991-03-07

Family

ID=15490542

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8484305598T Expired - Lifetime DE3484037D1 (de) 1983-08-19 1984-08-17 Aufzeichnungselement fuer eine information.

Country Status (6)

Country Link
US (2) US4637976A (de)
EP (1) EP0135370B1 (de)
JP (1) JPS6042095A (de)
KR (1) KR920002557B1 (de)
CA (1) CA1227870A (de)
DE (1) DE3484037D1 (de)

Families Citing this family (42)

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JPS59185048A (ja) * 1983-04-01 1984-10-20 Matsushita Electric Ind Co Ltd 光学情報記録部材及び記録方法
JPS6144690A (ja) * 1984-08-10 1986-03-04 Res Dev Corp Of Japan 光による記録材料
US4718053A (en) * 1984-11-09 1988-01-05 Hitachi, Ltd. Optical information apparatus and method of recording and erasing information
JPH0725200B2 (ja) * 1985-05-13 1995-03-22 旭化成工業株式会社 情報の記録媒体
JPS61246942A (ja) * 1985-04-23 1986-11-04 Nippon Kogaku Kk <Nikon> 光デイスク
US4710899A (en) * 1985-06-10 1987-12-01 Energy Conversion Devices, Inc. Data storage medium incorporating a transition metal for increased switching speed
DE3675845D1 (de) * 1985-08-15 1991-01-10 Ibm Optisches aufzeichnungsverfahren.
CN1010519B (zh) * 1985-09-25 1990-11-21 松下电器产业株式会社 可逆的光学情报记录介质
JPH0725208B2 (ja) * 1985-12-25 1995-03-22 旭化成工業株式会社 情報記録用媒体
JPH0694230B2 (ja) * 1985-12-25 1994-11-24 旭化成工業株式会社 情報記録用材料
JP2585520B2 (ja) * 1985-12-27 1997-02-26 株式会社日立製作所 相変化記録媒体
JPS62222443A (ja) * 1986-03-22 1987-09-30 Nippon Telegr & Teleph Corp <Ntt> 書換型光記録媒体
JPS62222442A (ja) * 1986-03-22 1987-09-30 Nippon Telegr & Teleph Corp <Ntt> 書換型光記録媒体
US4818666A (en) * 1986-03-28 1989-04-04 U.S. Philips Corporation Erasable optical recording element and method of optically recording and erasing information
US4839208A (en) * 1986-04-30 1989-06-13 Nec Corporation Optical information recording medium
US4862414A (en) * 1986-06-11 1989-08-29 Kuehnle Manfred R Optoelectronic recording tape or strip comprising photoconductive layer on thin, monocrystalline, flexible sapphire base
JPS63187430A (ja) * 1987-01-30 1988-08-03 Toshiba Corp 情報記録媒体
JPH06101149B2 (ja) * 1987-04-20 1994-12-12 株式会社日立製作所 光学的情報記録媒体の結晶化方法
GB8815235D0 (en) * 1988-06-27 1988-08-03 Plasmon Data Systems Inc Improvements relating to optical data storage disks
US4981772A (en) * 1988-08-09 1991-01-01 Eastman Kodak Company Optical recording materials comprising antimony-tin alloys including a third element
JPH0248671A (ja) * 1988-08-11 1990-02-19 Fuji Electric Co Ltd 電子写真用感光体
US5268254A (en) * 1989-02-28 1993-12-07 Fuji Xerox Co., Ltd. Optical recording medium
JP2523907B2 (ja) * 1989-12-07 1996-08-14 松下電器産業株式会社 光学情報記録再生消去部材
US5196294A (en) * 1990-09-17 1993-03-23 Eastman Kodak Company Erasable optical recording materials and methods based on tellurium alloys
US5390142A (en) * 1992-05-26 1995-02-14 Kappa Numerics, Inc. Memory material and method for its manufacture
US5313176A (en) * 1992-10-30 1994-05-17 Motorola Lighting, Inc. Integrated common mode and differential mode inductor device
US5718983A (en) * 1992-10-30 1998-02-17 Kappa Numerics, Inc. Thin film composite having ferromagnetic and piezoelectric properties comprising a layer of Pb-Cd-Fe and a layer of Cr-Zn-(Te or Tl)
AU5455794A (en) * 1993-10-29 1995-05-22 Kappa Numerics Inc. Memory material and method for its manufacture
US5840466A (en) * 1994-03-25 1998-11-24 Toray Industries, Inc. Optical recording media and their production methods
US6300039B1 (en) * 1994-03-25 2001-10-09 Toray Industries, Inc. Optical recording medium
JP2816320B2 (ja) * 1995-12-18 1998-10-27 株式会社日立製作所 光学的情報記録媒体の結晶化方法
US6821707B2 (en) 1996-03-11 2004-11-23 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, producing method thereof and method of recording/erasing/reproducing information
EP1396851B1 (de) * 1997-03-27 2007-02-21 Mitsubishi Kagaku Media Co., Ltd. Optisches Informationsaufzeichnungsmedium
JPH11134720A (ja) 1997-08-28 1999-05-21 Matsushita Electric Ind Co Ltd 光学的情報記録媒体及びその記録再生方法
US6343062B1 (en) 1997-09-26 2002-01-29 Matsushita Electric Industrial Co., Ltd Optical disk device and optical disk for recording and reproducing high-density signals
US6143359A (en) * 1998-04-14 2000-11-07 Lightyear Technologies (Usa), Inc. Soluble metal hydride/transition metal dichalcogenide alloys
WO2000006391A1 (fr) * 1998-07-31 2000-02-10 Hitachi Maxell, Ltd. Support et procede d'enregistrement d'informations
TW448443B (en) 1998-08-05 2001-08-01 Matsushita Electric Ind Co Ltd Optical information storage media and production method as well as the storage reproducing method and device
US6511788B1 (en) * 1999-02-12 2003-01-28 Sony Corporation Multi-layered optical disc
JP2005190642A (ja) * 2003-12-03 2005-07-14 Ricoh Co Ltd 光記録媒体
US9761830B1 (en) * 2012-05-14 2017-09-12 Eclipse Energy Systems, Inc. Environmental protection film for thin film devices
CN113231072B (zh) * 2021-03-24 2022-04-26 西南化工研究设计院有限公司 一种丙酮加氢制异丙醇催化剂及应用

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US3530441A (en) * 1969-01-15 1970-09-22 Energy Conversion Devices Inc Method and apparatus for storing and retrieving information
DE2358859C3 (de) * 1973-11-26 1981-08-06 Robert Bosch Gmbh, 7000 Stuttgart Aufzeichungsträger zum optischen Aufzeichnen von Informationen mittels sequentieller Signale
JPS5936595B2 (ja) * 1975-12-09 1984-09-04 松下電器産業株式会社 ジヨウホウキロクホウホウ
JPS6028057B2 (ja) * 1976-04-30 1985-07-02 株式会社日立製作所 光記録装置
JPS606499B2 (ja) * 1976-07-28 1985-02-19 富士写真フイルム株式会社 画像形成材料および画像形成方法
JPS5331106A (en) * 1976-09-03 1978-03-24 Hitachi Ltd Information recording member
JPS5528530A (en) * 1978-08-17 1980-02-29 Matsushita Electric Ind Co Ltd Optical information recording method
JPS5817037B2 (ja) * 1979-03-26 1983-04-04 株式会社日立製作所 記録用部材
NL7902542A (nl) * 1979-04-02 1980-10-06 Philips Nv Optische registratie-inrichting met meerdere ablatieve registreerlagen.
JPS563443A (en) * 1979-06-22 1981-01-14 Hitachi Ltd Information recording component
JPS56155793A (en) * 1980-05-06 1981-12-02 Nippon Telegr & Teleph Corp <Ntt> Optical memory medium
JPS56155940A (en) * 1980-05-06 1981-12-02 Nippon Telegr & Teleph Corp <Ntt> Optically recording medium
JPS56156941A (en) * 1980-05-06 1981-12-03 Nippon Telegr & Teleph Corp <Ntt> Optical recording medium
JPS57111839A (en) * 1980-05-14 1982-07-12 Rca Corp Reversible information recording body and method of reversibly recording and erasing information to said recording body
EP0045183B1 (de) * 1980-07-25 1984-12-05 Asahi Kasei Kogyo Kabushiki Kaisha Aufzeichnungsmaterial
JPS6023997B2 (ja) * 1980-08-20 1985-06-10 株式会社日立製作所 記録用部材
JPS5754856A (en) * 1980-09-19 1982-04-01 Matsushita Electric Ind Co Ltd Oxygen concentration detector
JPS5766996A (en) * 1980-10-15 1982-04-23 Hitachi Ltd Information recording member and method of preparing thereof
NL8005693A (nl) * 1980-10-16 1982-05-17 Philips Nv Optische registratie schijf.
JPS57146691A (en) * 1981-03-09 1982-09-10 Nippon Telegr & Teleph Corp <Ntt> Optical memory medium

Also Published As

Publication number Publication date
CA1227870A (en) 1987-10-06
KR920002557B1 (ko) 1992-03-27
US4637976A (en) 1987-01-20
EP0135370B1 (de) 1991-01-30
JPH0461791B2 (de) 1992-10-02
EP0135370A1 (de) 1985-03-27
US4769311A (en) 1988-09-06
JPS6042095A (ja) 1985-03-06
KR850002630A (ko) 1985-05-15

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