DE69011443T2 - Geformter Gegenstand für optische Zwecke und Medium für optische Datenspeicherung. - Google Patents

Geformter Gegenstand für optische Zwecke und Medium für optische Datenspeicherung.

Info

Publication number
DE69011443T2
DE69011443T2 DE69011443T DE69011443T DE69011443T2 DE 69011443 T2 DE69011443 T2 DE 69011443T2 DE 69011443 T DE69011443 T DE 69011443T DE 69011443 T DE69011443 T DE 69011443T DE 69011443 T2 DE69011443 T2 DE 69011443T2
Authority
DE
Germany
Prior art keywords
optical
medium
data storage
shaped object
purposes
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
DE69011443T
Other languages
English (en)
Other versions
DE69011443T3 (de
DE69011443D1 (de
Inventor
Makoto Tsukahara
Katsumi Uchiyama
Toshihiko Fujishima
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.)
Idemitsu Kosan Co Ltd
Original Assignee
Idemitsu Petrochemical Co 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=17007184&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE69011443(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Publication of DE69011443D1 publication Critical patent/DE69011443D1/de
Application granted granted Critical
Publication of DE69011443T2 publication Critical patent/DE69011443T2/de
Publication of DE69011443T3 publication Critical patent/DE69011443T3/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
    • G11B7/253—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
DE69011443T 1989-09-14 1990-09-13 Geformter Gegenstand für optische Zwecke und Medium für optische Datenspeicherung. Expired - Lifetime DE69011443T3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1236882A JP2662049B2 (ja) 1989-09-14 1989-09-14 光学式ディスク基板及び光学式情報記録媒体

Publications (3)

Publication Number Publication Date
DE69011443D1 DE69011443D1 (de) 1994-09-15
DE69011443T2 true DE69011443T2 (de) 1995-03-30
DE69011443T3 DE69011443T3 (de) 1999-10-14

Family

ID=17007184

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69011443T Expired - Lifetime DE69011443T3 (de) 1989-09-14 1990-09-13 Geformter Gegenstand für optische Zwecke und Medium für optische Datenspeicherung.

Country Status (3)

Country Link
EP (1) EP0417775B2 (de)
JP (1) JP2662049B2 (de)
DE (1) DE69011443T3 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04331257A (ja) * 1991-05-01 1992-11-19 Teijin Chem Ltd 光学成形品用成形材料
JPH07334864A (ja) * 1994-06-08 1995-12-22 Kuraray Co Ltd 情報記録媒体、情報記録媒体基板および情報記録媒体の検査方法
DE19545330A1 (de) * 1995-12-05 1997-06-12 Bayer Ag Verwendung von Carbonaten als Entformungsmittel für thermoplastische Polycarbonate
AU5289699A (en) * 1998-08-13 2000-03-06 Bayer Aktiengesellschaft Highly pure polycarbonates and method for producing same
DE19859050A1 (de) 1998-12-21 2000-06-29 Bayer Ag Neue Polymergemische mit Entformungsmitteln
JP4928018B2 (ja) * 1999-12-03 2012-05-09 帝人株式会社 芳香族ポリカーボネート、その製造法および成形品
JP2002069219A (ja) * 2000-08-31 2002-03-08 Teijin Chem Ltd ポリカーボネート樹脂組成物成形体
JP4673998B2 (ja) * 2001-05-08 2011-04-20 帝人化成株式会社 高精密転写性ポリカーボネート樹脂光学用成形材料、およびそれより形成された光ディスク基板
TWI357418B (en) 2004-09-02 2012-02-01 Teijin Chemicals Ltd Optical disc
JP6026946B2 (ja) 2013-04-19 2016-11-16 出光興産株式会社 ポリカーボネート系樹脂組成物及び成形体
JP6027211B2 (ja) * 2015-11-10 2016-11-16 出光興産株式会社 ポリカーボネート系樹脂組成物及び成形体

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5586837A (en) * 1978-12-26 1980-07-01 Teijin Chem Ltd Polycarbonate resin composition
DE3143252A1 (de) * 1981-10-31 1983-05-11 Bayer Ag, 5090 Leverkusen Verfahren zur herstellung von polycarbonaten mit verbessertem alterungsverhalten
DE3512838A1 (de) * 1984-04-10 1985-10-17 Mitsubishi Gas Chemical Co., Inc., Tokio/Tokyo Optischer gegenstand aus verzweigtem polykarbonatharz
JPS61287923A (ja) * 1985-06-14 1986-12-18 Matsushita Electric Ind Co Ltd 光デイスク
JP2528838B2 (ja) * 1986-10-14 1996-08-28 ソニー株式会社 光学式情報記録媒体
JPH0653793B2 (ja) * 1986-10-22 1994-07-20 出光石油化学株式会社 ポリカ−ボネ−ト有機溶剤液の洗浄方法
US4880896A (en) * 1987-05-30 1989-11-14 Idemitsu Petrochemical Co., Ltd. Polycarbonate for disc substrate having low bisphenol content
ATE169316T1 (de) * 1988-09-22 1998-08-15 Ge Plastics Japan Ltd Verfahren zur herstellung von polycarbonaten

Also Published As

Publication number Publication date
JP2662049B2 (ja) 1997-10-08
DE69011443T3 (de) 1999-10-14
DE69011443D1 (de) 1994-09-15
EP0417775B1 (de) 1994-08-10
EP0417775B2 (de) 1999-03-24
EP0417775A3 (en) 1991-06-19
EP0417775A2 (de) 1991-03-20
JPH03100501A (ja) 1991-04-25

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8366 Restricted maintained after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: IDEMITSU KOSAN CO., LTD., TOKIO/TOKYO, JP