DE3173458D1 - Data recording medium and manufacturing method therefor - Google Patents

Data recording medium and manufacturing method therefor

Info

Publication number
DE3173458D1
DE3173458D1 DE8181107747T DE3173458T DE3173458D1 DE 3173458 D1 DE3173458 D1 DE 3173458D1 DE 8181107747 T DE8181107747 T DE 8181107747T DE 3173458 T DE3173458 T DE 3173458T DE 3173458 D1 DE3173458 D1 DE 3173458D1
Authority
DE
Germany
Prior art keywords
manufacturing
recording medium
data recording
method therefor
therefor
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
Application number
DE8181107747T
Other languages
English (en)
Inventor
Hideo Ando
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Application granted granted Critical
Publication of DE3173458D1 publication Critical patent/DE3173458D1/de
Expired 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
    • G11B7/24018—Laminated discs
    • G11B7/24021—Laminated discs provided with a special shape or structure for centering or eccentricity prevention, e.g. alignment
DE8181107747T 1980-10-09 1981-09-29 Data recording medium and manufacturing method therefor Expired DE3173458D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55141720A JPS5766540A (en) 1980-10-09 1980-10-09 Optical information storage carrier and its manufacture

Publications (1)

Publication Number Publication Date
DE3173458D1 true DE3173458D1 (en) 1986-02-20

Family

ID=15298626

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181107747T Expired DE3173458D1 (en) 1980-10-09 1981-09-29 Data recording medium and manufacturing method therefor

Country Status (4)

Country Link
US (1) US4432002A (de)
EP (1) EP0049813B1 (de)
JP (1) JPS5766540A (de)
DE (1) DE3173458D1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4423137A (en) * 1980-10-28 1983-12-27 Quixote Corporation Contact printing and etching method of making high density recording medium
JPS57169938A (en) * 1981-04-10 1982-10-19 Sony Corp Optical type recording medium
US5305301A (en) * 1981-04-10 1994-04-19 Sony Corporation Optically readable record carriers
NL8402193A (nl) * 1984-07-11 1986-02-03 Philips Nv Optisch registratie element.
US5273598A (en) * 1985-02-18 1993-12-28 Hitachi Maxell, Ltd. Optical disc manufacturing method
EP0192244B1 (de) * 1985-02-18 1990-06-13 Hitachi Maxell Ltd. Optische Platte
JPH07107750B2 (ja) * 1986-02-21 1995-11-15 コニカ株式会社 情報記録媒体
JPS63167442A (ja) * 1986-12-29 1988-07-11 Mitsubishi Kasei Corp 光デイスク
JPS63188838A (ja) * 1987-01-31 1988-08-04 Toshiba Corp 情報記録媒体
US5392263A (en) 1990-01-31 1995-02-21 Sony Corporation Magneto-optical disk system with specified thickness for protective layer on the disk relative to the numerical aperture of the objective lens
JPH03256240A (ja) * 1990-03-06 1991-11-14 Ricoh Co Ltd 光情報記録媒体
JP2616596B2 (ja) * 1990-04-20 1997-06-04 松下電器産業株式会社 光ディスク
USRE37185E1 (en) 1990-04-20 2001-05-22 Matsushita Electric Industrial Co., Ltd. Optical head
US5146438A (en) * 1990-05-30 1992-09-08 E. I. Du Pont De Nemours & Co. Method of making double-sided magneto-optical disks having reduced birefringence
TW247960B (de) * 1992-11-16 1995-05-21 Canon Kk

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3665483A (en) * 1969-06-06 1972-05-23 Chase Manhattan Capital Corp Laser recording medium
US4179532A (en) * 1976-04-09 1979-12-18 Polygram Gmbh Process for producing a disc-shaped information carrier which has information in the form of a beam-reflecting structure
DE2653831C2 (de) * 1976-11-26 1982-09-09 Polygram Gmbh, 2000 Hamburg Plattenförmiger Informationsträger
DE2744533A1 (de) * 1977-10-04 1979-04-12 Polygram Gmbh Plattenfoermiger traeger zur optischen aufzeichnung und wiedergabe von signalen
JPS5496002A (en) * 1978-01-13 1979-07-30 Hitachi Ltd Information recording plate
US4264911A (en) * 1979-08-20 1981-04-28 Mca Discovision, Inc. Optical recording disc and related method of manufacture

Also Published As

Publication number Publication date
EP0049813B1 (de) 1986-01-08
US4432002A (en) 1984-02-14
JPS5766540A (en) 1982-04-22
JPH026138B2 (de) 1990-02-07
EP0049813A1 (de) 1982-04-21

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)