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GB2222603B - Improvements relating to optical disks - Google Patents

Improvements relating to optical disks

Info

Publication number
GB2222603B
GB2222603B GB8914699A GB8914699A GB2222603B GB 2222603 B GB2222603 B GB 2222603B GB 8914699 A GB8914699 A GB 8914699A GB 8914699 A GB8914699 A GB 8914699A GB 2222603 B GB2222603 B GB 2222603B
Authority
GB
United Kingdom
Prior art keywords
optical disks
improvements relating
relating
disks
optical
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 - Fee Related
Application number
GB8914699A
Other versions
GB8914699D0 (en
GB2222603A (en
Inventor
Robert James Longman
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.)
Plasmon Data Systems Inc
Original Assignee
Plasmon Data Systems Inc
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 Plasmon Data Systems Inc filed Critical Plasmon Data Systems Inc
Publication of GB8914699D0 publication Critical patent/GB8914699D0/en
Publication of GB2222603A publication Critical patent/GB2222603A/en
Application granted granted Critical
Publication of GB2222603B publication Critical patent/GB2222603B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02—Pretreatment of the material to be coated
    • C23C14/021—Cleaning or etching treatments
    • 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

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Manufacturing Optical Record Carriers (AREA)
GB8914699A 1988-06-27 1989-06-27 Improvements relating to optical disks Expired - Fee Related GB2222603B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB888815236A GB8815236D0 (en) 1988-06-27 1988-06-27 Improvements relating to optical disks

Publications (3)

Publication Number Publication Date
GB8914699D0 GB8914699D0 (en) 1989-08-16
GB2222603A GB2222603A (en) 1990-03-14
GB2222603B true GB2222603B (en) 1992-09-23

Family

ID=10639419

Family Applications (2)

Application Number Title Priority Date Filing Date
GB888815236A Pending GB8815236D0 (en) 1988-06-27 1988-06-27 Improvements relating to optical disks
GB8914699A Expired - Fee Related GB2222603B (en) 1988-06-27 1989-06-27 Improvements relating to optical disks

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB888815236A Pending GB8815236D0 (en) 1988-06-27 1988-06-27 Improvements relating to optical disks

Country Status (1)

Country Link
GB (2) GB8815236D0 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2006225A (en) * 1977-10-07 1979-05-02 Radiation Dynamics Method for Reducing the Monomer Content in Styrene and acrylonitrile
GB2036045A (en) * 1978-11-08 1980-06-25 Davy International Ag Heat-treating polyesters
GB2198278A (en) * 1986-10-14 1988-06-08 Sony Corp Optical information record media
US4788015A (en) * 1986-12-23 1988-11-29 Dainippon Ink And Chemical Inc. Process for preparation of optical disk substrate
EP0293769A2 (en) * 1987-05-30 1988-12-07 Idemitsu Petrochemical Co., Ltd. Polycarbonate for disc substrate
EP0333393A1 (en) * 1988-03-16 1989-09-20 Canon Kabushiki Kaisha Method for preparing magnetic recording medium

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2006225A (en) * 1977-10-07 1979-05-02 Radiation Dynamics Method for Reducing the Monomer Content in Styrene and acrylonitrile
GB2036045A (en) * 1978-11-08 1980-06-25 Davy International Ag Heat-treating polyesters
GB2198278A (en) * 1986-10-14 1988-06-08 Sony Corp Optical information record media
US4788015A (en) * 1986-12-23 1988-11-29 Dainippon Ink And Chemical Inc. Process for preparation of optical disk substrate
EP0293769A2 (en) * 1987-05-30 1988-12-07 Idemitsu Petrochemical Co., Ltd. Polycarbonate for disc substrate
EP0333393A1 (en) * 1988-03-16 1989-09-20 Canon Kabushiki Kaisha Method for preparing magnetic recording medium

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 1094549 A *

Also Published As

Publication number Publication date
GB8815236D0 (en) 1988-08-03
GB8914699D0 (en) 1989-08-16
GB2222603A (en) 1990-03-14

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Legal Events

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

Effective date: 19930627