CA2178958A1 - Optical information recording medium and method for producing same - Google Patents

Optical information recording medium and method for producing same

Info

Publication number
CA2178958A1
CA2178958A1 CA002178958A CA2178958A CA2178958A1 CA 2178958 A1 CA2178958 A1 CA 2178958A1 CA 002178958 A CA002178958 A CA 002178958A CA 2178958 A CA2178958 A CA 2178958A CA 2178958 A1 CA2178958 A1 CA 2178958A1
Authority
CA
Canada
Prior art keywords
recording medium
information recording
optical information
optical
producing same
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
CA002178958A
Other languages
French (fr)
Other versions
CA2178958C (en
Inventor
Kazumi Sawada
Yoshihiro Shigemori
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.)
Sony Music Solutions Inc
Original Assignee
Kazumi Sawada
Yoshihiro Shigemori
Sony Disc Technology Inc.
Sony Disc & Digital Solutions 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
Priority claimed from JP6264282A external-priority patent/JPH08124212A/en
Application filed by Kazumi Sawada, Yoshihiro Shigemori, Sony Disc Technology Inc., Sony Disc & Digital Solutions Inc. filed Critical Kazumi Sawada
Publication of CA2178958A1 publication Critical patent/CA2178958A1/en
Application granted granted Critical
Publication of CA2178958C publication Critical patent/CA2178958C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/40—Identifying or analogous means applied to or incorporated in the record carrier and not intended for visual display simultaneously with the playing-back of the record carrier, e.g. label, leader, photograph
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0013—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor using fillers dispersed in the moulding material, e.g. metal particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D17/00—Producing carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records; Producing record discs from master stencils
    • B29D17/005—Producing optically read record carriers, e.g. optical 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
    • G11B7/241—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
    • G11B7/253—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 substrates
    • G11B7/2533—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 substrates comprising resins
    • G11B7/2534—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 substrates comprising resins polycarbonates [PC]
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
    • B29K2995/002—Coloured
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The present invention is relative to an optical information recording medium having a reflective layer for reading out information signals by an optical technique. The optical information recording medium is formed as a plastic substrate.
According to the present invention, the substrate is colored by admixture of a dyestuff for enabling instant judgment by the visual sense of the operator as to the contents of the optical information recording medium, for example, as to if the contents of the recording medium is a game program or the music information. If impurities such as dyestuffs are admixed, the optical system of the readout device is usually affected thus raising readout difficulties. Such ill effects on the optical system may be eliminated by setting the particle size of the dyestuff so as to be 50 µm or less.
CA002178958A 1994-10-27 1995-10-25 Optical information recording medium and method for producing same Expired - Fee Related CA2178958C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JPP6-264282 1994-10-27
JP6264282A JPH08124212A (en) 1994-10-27 1994-10-27 Optical information recording medium and production thereof
PCT/JP1995/002190 WO1996013834A1 (en) 1994-10-27 1995-10-25 Optical information recording medium and its manufacturing method

Publications (2)

Publication Number Publication Date
CA2178958A1 true CA2178958A1 (en) 1996-05-09
CA2178958C CA2178958C (en) 2006-08-01

Family

ID=36764226

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002178958A Expired - Fee Related CA2178958C (en) 1994-10-27 1995-10-25 Optical information recording medium and method for producing same

Country Status (1)

Country Link
CA (1) CA2178958C (en)

Also Published As

Publication number Publication date
CA2178958C (en) 2006-08-01

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20151026