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DE691688C - Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning - Google Patents

Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning

Info

Publication number
DE691688C
DE691688C DE1935H0145608 DEH0145608D DE691688C DE 691688 C DE691688 C DE 691688C DE 1935H0145608 DE1935H0145608 DE 1935H0145608 DE H0145608 D DEH0145608 D DE H0145608D DE 691688 C DE691688 C DE 691688C
Authority
DE
Germany
Prior art keywords
intermediate layer
production
cathode ray
ray scanning
insulating intermediate
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
DE1935H0145608
Other languages
German (de)
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.)
WALTER HEIMANN DR ING
Original Assignee
WALTER HEIMANN DR ING
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 WALTER HEIMANN DR ING filed Critical WALTER HEIMANN DR ING
Priority to DE1935H0145608 priority Critical patent/DE691688C/en
Application granted granted Critical
Publication of DE691688C publication Critical patent/DE691688C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/36Photoelectric screens; Charge-storage screens
    • H01J29/39Charge-storage screens
    • H01J29/43Charge-storage screens using photo-emissive mosaic, e.g. for orthicon, for iconoscope

Landscapes

  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Description

Verfahren zur Herstellung einer isolierenden Zwischenschicht für Bildwurfelektroden von speichernden Bildfängerröhren mit Kathodenstrahlabtastung Die- Impulsplatte bei einem Kathodenstrahlabtaster setzt sich bekanntlich aus -drei Teilen zusammen, und zwar aus einer .dielektrischen Zwischenschicht, auf deren einer Seite eine homogene Metallschicht (Signalplatte) und auf deren anderer Seite eine fein unterteilte Metallschicht, die später photoelektrisch wirksam zu machen ist, angeordnet ist. Die dielektrische Zwischenschicht besteht iin allgemeinen aus einer Glimmerplatte; die gleichzeitig als Träger der Gesamtimpulsplatte dient. Zur Erhöhung der wirksamen Kapazität müßte man die Dicke .der Glimmerplatte sehr stark verringern, was auf Kosten der Haltbarkeit geht. Denn würde man, wie es bekanntgeworden ist, die Zwischenschicht durch Aufstreuen oder Aufdampfen eines Dielektrikums ;auf reine Metallplatte herstellen, so würde eine im Laufe der Herstellung @erforderliche sehr hohe Temperatur (8oo°)eine Zerstörung einer solch dünnen Isolation herbeiführen.Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning die pulse plate a cathode ray scanner is known to consist of three parts, namely from a .dielectric intermediate layer, on one side of which a homogeneous Metal layer (signal plate) and on the other side a finely divided metal layer, which is later to be made photoelectrically effective, is arranged. The dielectric The intermediate layer generally consists of a sheet of mica; the same time serves as the carrier of the overall impulse plate. To increase the effective capacity would have to you reduce the thickness of the mica plate very much, which at the expense of durability goes. Because, as it has become known, the intermediate layer would be sprinkled on or vapor deposition of a dielectric; to manufacture on a pure metal plate, so would a very high temperature (8oo °) required in the course of manufacture will result in destruction bring about such a thin insulation.

Um diesen Nachteil zu beheben, wird er-' fandungsgemäß als Zwischenschicht ein in ein Oxyd leicht überzuführendes Metall, z. B. Magnesium, verwendet. Auf eine solche beliebig dünn herzustellende Metallschicht wird zunächst die später als Rasterschicht dienende Lage aufgebracht," z. B. Silberoxyd aufgestreut. Bereits bei relativ niedrigen Tempneraturen erfolgt ,eine Reduktion des Silberoxyds zu metallischem Silber und gleichzeitig eine Oxydation des sauerstoffaffineren Magnesiums. Die dabei frei werdende Wärme reißt das homogene Silber in lauter kleine Metallkügelchen auf, die später photoaktiviert werden. Falls die Oxydation der metallischen Zwischenschicht nicht vollständig durchgeführt ist, kann durch zusätzliche Einführung von Sauerstoff nachgeholfen werden. Die so hergestellten Schichten haben den Vorteil einer vollkommenen Gleichmäßigkeit und halten Temperaturen bis z. B: i 6oo°, bei denen eine Einbettung des später zu, aktivierenden Rastermetalls (Silber) in den Isolator erfolgt, wodurch eine leibende- Verbindung der einzelnen Rasterelemente verhindert wird, ohne weiteres aus. PATENTANSPRÜCHE: i. Verfahren zur Herstellung einer isolierenden Zwischenschicht für Bildwurfelektroden (Photomosaik) von speichernden Bildfängerröhren mit Kathodenstrählabtastung, dadurch gekennzeichnet, @daß zur Herstellung des Dielektrikums -ein sauerstoffaffines Metall, z. B. Magnesium, verwendet wird, auf das das später zu aktivierende. Silberoxyd aufgestreut wird, und durch Reduktion des Silberoxyds zu metallischem Silber eine Oxydation der ursprünglich metallischen Zwischenschicht entsteht.In order to remedy this disadvantage, according to the invention is used as an intermediate layer a metal easily converted into an oxide, e.g. B. Magnesium is used. On a such metal layer, which can be made as thin as desired, is initially used as a grid layer Serving layer applied, "eg silver oxide sprinkled on. Already at relatively low Temperature occurs, a reduction of the silver oxide to metallic silver and at the same time an oxidation of the oxygen-affine magnesium. The one that becomes free Heat tears the homogeneous silver up into small metal balls, which later are photoactivated. If the oxidation of the metallic intermediate layer does not has been carried out completely, additional introduction of oxygen can help will. The layers produced in this way have the advantage of perfect uniformity and keep temperatures up to z. B: i 600 °, in which an embedding of the activating grid metal (silver) takes place in the insulator, whereby an abiding- Connection of the individual grid elements is prevented without further ado. PATENT CLAIMS: i. Process for the production of an insulating intermediate layer for image cube electrodes (Photo mosaic) of storing image capture tubes with cathode ray scanning, thereby characterized, @ that for the production of the dielectric -a oxygen-affine metal, z. B. Magnesium, is used on the later to be activated. Silver oxide is scattered, and by reducing the silver oxide to metallic silver a Oxidation of the originally metallic intermediate layer occurs.

z. Abänderung des Verfahrens nach Einspruch i, gekennzeichnet durch eine zusätzliche Einführung von Sauerstoff.z. Modification of the procedure according to objection i, characterized by an additional introduction of oxygen.

Claims (1)

DE1935H0145608 1935-11-13 1935-11-13 Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning Expired DE691688C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1935H0145608 DE691688C (en) 1935-11-13 1935-11-13 Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1935H0145608 DE691688C (en) 1935-11-13 1935-11-13 Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning

Publications (1)

Publication Number Publication Date
DE691688C true DE691688C (en) 1940-06-03

Family

ID=7179721

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1935H0145608 Expired DE691688C (en) 1935-11-13 1935-11-13 Process for the production of an insulating intermediate layer for image cube electrodes of storing image capture tubes with cathode ray scanning

Country Status (1)

Country Link
DE (1) DE691688C (en)

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