GB2086125B - High density information discs - Google Patents

High density information discs

Info

Publication number
GB2086125B
GB2086125B GB8131972A GB8131972A GB2086125B GB 2086125 B GB2086125 B GB 2086125B GB 8131972 A GB8131972 A GB 8131972A GB 8131972 A GB8131972 A GB 8131972A GB 2086125 B GB2086125 B GB 2086125B
Authority
GB
United Kingdom
Prior art keywords
high density
density information
information discs
discs
information
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
GB8131972A
Other versions
GB2086125A (en
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Publication of GB2086125A publication Critical patent/GB2086125A/en
Application granted granted Critical
Publication of GB2086125B publication Critical patent/GB2086125B/en
Expired 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
    • G11B23/0057—Intermediate mediums, i.e. mediums provided with an information structure not specific to the method of reproducing or duplication such as matrixes for mechanical pressing of an information structure ; record carriers having a relief information structure provided with or included in layers not specific for a single reproducing method; apparatus or processes specially adapted for their manufacture
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B9/00—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor
    • G11B9/06—Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00; Record carriers therefor using record carriers having variable electrical capacitance; Record carriers therefor
    • G11B9/061—Record carriers characterised by their structure or form or by the selection of the material; Apparatus or processes specially adapted for the manufacture of record carriers
GB8131972A 1980-10-27 1981-10-23 High density information discs Expired GB2086125B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20105680A 1980-10-27 1980-10-27

Publications (2)

Publication Number Publication Date
GB2086125A GB2086125A (en) 1982-05-06
GB2086125B true GB2086125B (en) 1985-08-07

Family

ID=22744295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8131972A Expired GB2086125B (en) 1980-10-27 1981-10-23 High density information discs

Country Status (6)

Country Link
JP (1) JPS57109139A (en)
AT (1) AT375479B (en)
DE (1) DE3141545A1 (en)
FR (1) FR2493020B1 (en)
GB (1) GB2086125B (en)
IT (1) IT1139503B (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3842194A (en) * 1971-03-22 1974-10-15 Rca Corp Information records and recording/playback systems therefor
GB1417708A (en) * 1972-04-19 1975-12-17 Rca Corp Electron beam recording
DE2603888B2 (en) * 1975-02-24 1977-12-15 MCA Disco-Vision, Znc, Universal City, Calif. (V-StA.) Process for the production of a replica die for information carrier and die for the formation of video disc reproduction
US4241120A (en) * 1978-11-13 1980-12-23 Rca Corporation Video discs and molding compositions therefor
US4228050A (en) * 1979-01-15 1980-10-14 Rca Corporation Conductive molding composition
US4472337A (en) * 1979-11-07 1984-09-18 Rca Corporation Video disc processing

Also Published As

Publication number Publication date
AT375479B (en) 1984-08-10
DE3141545A1 (en) 1982-07-08
IT1139503B (en) 1986-09-24
FR2493020B1 (en) 1986-04-04
FR2493020A1 (en) 1982-04-30
IT8124359A0 (en) 1981-10-06
GB2086125A (en) 1982-05-06
ATA457281A (en) 1983-12-15
JPS57109139A (en) 1982-07-07

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Legal Events

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