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DE3574645D1 - Optischer plattentraeger aus polycarbonat mit einem breiten durchmesser, verfahren zu seiner herstellung und form dafuer. - Google Patents

Optischer plattentraeger aus polycarbonat mit einem breiten durchmesser, verfahren zu seiner herstellung und form dafuer.

Info

Publication number
DE3574645D1
DE3574645D1 DE8585100524T DE3574645T DE3574645D1 DE 3574645 D1 DE3574645 D1 DE 3574645D1 DE 8585100524 T DE8585100524 T DE 8585100524T DE 3574645 T DE3574645 T DE 3574645T DE 3574645 D1 DE3574645 D1 DE 3574645D1
Authority
DE
Germany
Prior art keywords
polycarbonate
production
optical plate
plate carrier
wide diameter
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
DE8585100524T
Other languages
English (en)
Inventor
Shinji Tokuhara
Yoshio Onizawa
Shuzo Iyoshi
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.)
Daicel Corp
Original Assignee
Daicel Chemical Industries 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 Daicel Chemical Industries Ltd filed Critical Daicel Chemical Industries Ltd
Application granted granted Critical
Publication of DE3574645D1 publication Critical patent/DE3574645D1/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
    • G11B7/258—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
    • 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
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
    • G11B5/739—Magnetic recording media substrates
    • G11B5/73923—Organic polymer substrates
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Manufacturing Optical Record Carriers (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
DE8585100524T 1984-01-26 1985-01-18 Optischer plattentraeger aus polycarbonat mit einem breiten durchmesser, verfahren zu seiner herstellung und form dafuer. Expired - Lifetime DE3574645D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59012565A JPS60155424A (ja) 1984-01-26 1984-01-26 大径のポリカ−ボネ−ト製光デイスク基板およびその製造法

Publications (1)

Publication Number Publication Date
DE3574645D1 true DE3574645D1 (de) 1990-01-11

Family

ID=11808870

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585100524T Expired - Lifetime DE3574645D1 (de) 1984-01-26 1985-01-18 Optischer plattentraeger aus polycarbonat mit einem breiten durchmesser, verfahren zu seiner herstellung und form dafuer.

Country Status (4)

Country Link
US (1) US4764331A (de)
EP (1) EP0155452B1 (de)
JP (1) JPS60155424A (de)
DE (1) DE3574645D1 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62121767A (ja) * 1985-11-20 1987-06-03 Olympus Optical Co Ltd 情報記録媒体用基盤
JPS62184639A (ja) * 1986-02-07 1987-08-13 Matsushita Electric Ind Co Ltd 光デイスク
JPS62204451A (ja) * 1986-03-03 1987-09-09 Daicel Chem Ind Ltd 光デイスク用プラスチツク基板とその製法
FR2604552A1 (fr) * 1986-09-29 1988-04-01 Rhone Poulenc Chimie Substrat polymere rigide utilisable comme support d'enregistrement magnetique et le disque magnetique obtenu a partir de ce substrat
FR2604553A1 (fr) * 1986-09-29 1988-04-01 Rhone Poulenc Chimie Substrat polymere rigide pour disque optique et les disques optiques obtenus a partir dudit substrat
US4876133A (en) * 1986-11-14 1989-10-24 Hitachi Maxell, Ltd. Optical data recording system and method of production of recording medium
USRE37719E1 (en) * 1986-11-14 2002-05-28 Toshinori Sugiyama Optical data recording system and method of production of recording medium
JPH0757499B2 (ja) * 1987-01-30 1995-06-21 キヤノン株式会社 光デイスク基板の製造法
US4877666A (en) * 1987-08-11 1989-10-31 Kerdix, Inc. Magneto-optic substrates
JP2680591B2 (ja) * 1988-02-15 1997-11-19 シャープ株式会社 光メモリ素子の製造方法
JPH0763991B2 (ja) * 1988-04-16 1995-07-12 ダイセル化学工業株式会社 フォーマット入り光ディスク基板成形用金型
JP2564638B2 (ja) * 1988-12-30 1996-12-18 太陽誘電株式会社 コンパクトディスクの製造方法
EP0379130B2 (de) * 1989-01-20 2003-08-13 Idemitsu Petrochemical Co., Ltd. Optische Trägerplatte, optisches Informationsspeichermedium und Verfahren zur Herstellung der optischen Trägerplatte
US4980105A (en) * 1989-08-28 1990-12-25 General Electric Company Method for extruder devolatilization of spiro(bis)indane polycarbonates
US5227897A (en) * 1990-05-04 1993-07-13 Fohrman Scott R Reproduction of holograms
DE69127525T2 (de) * 1990-10-03 1998-01-08 Canon Kk Optisches Aufzeichnungsmedium und Verfahren zur dessen Herstellung
US5293370A (en) * 1991-01-16 1994-03-08 Del Mar Avionics Method and apparatus for creating optical disc masters
JPH0746445B2 (ja) * 1993-10-12 1995-05-17 ダイセル化学工業株式会社 光磁気記録ディスクと、その製造方法
JP2500146B2 (ja) * 1993-11-05 1996-05-29 日立マクセル株式会社 光情報記録媒体の製造方法
US5585989A (en) * 1993-11-30 1996-12-17 Sony Corporation Magnetic disc substrate and a magnetic disc using the same
CA2171584A1 (en) * 1995-04-11 1996-10-12 James P. Mason Compositions having low birefringence
SE9903255L (sv) * 1999-09-13 2001-03-14 Aamic Ab Förfarande för att framställa en matris samt en matris sålunda framställd.(Hybridtillämpningen)
US6790924B2 (en) * 2001-02-22 2004-09-14 E. I. Du Pont De Nemours And Company Method for protection of stone with fluorinated urethane

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2397931A1 (fr) * 1977-07-22 1979-02-16 Thomson Brandt Procede de reproduction de disque support d'information et disque obtenu par un tel procede
US4185955A (en) * 1977-10-31 1980-01-29 Mca Disco-Vision, Inc. Apparatus for replicating centrally apertured video disc records
GB2092942A (en) * 1981-02-13 1982-08-25 Allied Record Co A method of moulding a data carrying element
JPS58126119A (ja) * 1982-01-22 1983-07-27 Mitsubishi Chem Ind Ltd 光学的特性のすぐれた成形物の製造法

Also Published As

Publication number Publication date
JPS60155424A (ja) 1985-08-15
EP0155452A1 (de) 1985-09-25
JPH0341048B2 (de) 1991-06-20
US4764331A (en) 1988-08-16
EP0155452B1 (de) 1989-12-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee