GB1417047A - Information storage device - Google Patents

Information storage device

Info

Publication number
GB1417047A
GB1417047A GB1779373A GB1779373A GB1417047A GB 1417047 A GB1417047 A GB 1417047A GB 1779373 A GB1779373 A GB 1779373A GB 1779373 A GB1779373 A GB 1779373A GB 1417047 A GB1417047 A GB 1417047A
Authority
GB
United Kingdom
Prior art keywords
layer
april
aluminium
storage device
information storage
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
GB1779373A
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 GB1417047A publication Critical patent/GB1417047A/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
    • 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
    • G11B9/063—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 characterised by the selection of the material
    • G11B9/066—Electrically conductive layers

Abstract

1417047 Disc record for capacitive playback RCA CORPORATION 13 April 1973 [19 April 1972] 17793/73 Heading G5R The record described in Specification 1,392,206 intended for capacitive playback and comprising a thermoplastic disc carrying the information recorded as geometric variations in the base of a spiral groove which is coated with a conducting layer of aluminium and then with a dielectric layer of polystyrene is modified by substituting a layer of inert conductive material, e.g. gold, platinum, or conductive glass, for the aluminium layer.
GB1779373A 1972-04-19 1973-04-13 Information storage device Expired GB1417047A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24565372A 1972-04-19 1972-04-19

Publications (1)

Publication Number Publication Date
GB1417047A true GB1417047A (en) 1975-12-10

Family

ID=22927544

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1779373A Expired GB1417047A (en) 1972-04-19 1973-04-13 Information storage device

Country Status (10)

Country Link
JP (1) JPS533923B2 (en)
AU (1) AU469282B2 (en)
CA (1) CA998174A (en)
DE (1) DE2317849A1 (en)
ES (1) ES413611A1 (en)
FR (1) FR2180774B1 (en)
GB (1) GB1417047A (en)
IT (1) IT980812B (en)
NL (1) NL7305460A (en)
SU (1) SU452111A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4826382U (en) * 1971-08-11 1973-03-29
US4004080A (en) * 1975-07-25 1977-01-18 Rca Corporation Metal coating for video discs
JP4648991B1 (en) * 2010-08-02 2011-03-09 株式会社ホウショウＥｇ Rainwater infiltration mine drilling equipment

Also Published As

Publication number Publication date
FR2180774B1 (en) 1977-02-04
IT980812B (en) 1974-10-10
AU5464673A (en) 1974-10-24
JPS533923B2 (en) 1978-02-13
JPS4928303A (en) 1974-03-13
ES413611A1 (en) 1975-12-16
SU452111A3 (en) 1974-11-30
DE2317849A1 (en) 1973-10-31
CA998174A (en) 1976-10-05
AU469282B2 (en) 1976-02-12
NL7305460A (en) 1973-10-23
FR2180774A1 (en) 1973-11-30

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees