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DE3540247A1 - Method for pre-treating glass components for cathode-ray tubes - Google Patents

Method for pre-treating glass components for cathode-ray tubes

Info

Publication number
DE3540247A1
DE3540247A1 DE19853540247 DE3540247A DE3540247A1 DE 3540247 A1 DE3540247 A1 DE 3540247A1 DE 19853540247 DE19853540247 DE 19853540247 DE 3540247 A DE3540247 A DE 3540247A DE 3540247 A1 DE3540247 A1 DE 3540247A1
Authority
DE
Germany
Prior art keywords
acid
ray tubes
organic acid
glass
treatment
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.)
Withdrawn
Application number
DE19853540247
Other languages
German (de)
Inventor
Kanagaratnam Anandasivam
Klaus Gerland
Rolf Griessmayr
Ulrich Kube
Irene Kienle
Hermann Dr Widmann
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Priority to DE19853540247 priority Critical patent/DE3540247A1/en
Publication of DE3540247A1 publication Critical patent/DE3540247A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/28—Surface treatment of glass, not in the form of fibres or filaments, by coating with organic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/24—Supports for luminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/20—Manufacture of screens on or from which an image or pattern is formed, picked up, converted or stored; Applying coatings to the vessel
    • H01J9/22—Applying luminescent coatings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

It is proposed to pre-treat the glass surfaces for screens of cathode-ray tubes and glasses, once they have been cleaned, using an organic acid.

Description

Die vorliegende Erfindung betrifft eine Verfahren nach dem Oberbegriff des Patentanspruches 1.The present invention relates to a method according to the preamble of claim 1.

Bei der Herstellung von Leuchtschirmen und Innenrastern für Kathodenstrahlröhren mit sehr hohem Auflösungsver­ mögen machen sich bereits geringste Verunreinigungen auf der Oberfläche von Glasteilen, wie z. B. geringste Staubteilchen, störend bemerkbar. Diese Gefahr von unerwünschten Verunreinungsteilchen auf solchen Glas­ oberflächen ist dann besonders groß, wenn ein solches Glasteil nach der üblichen Vorreinigung noch eine gewisse Zeit zwischengelagert werden muß.In the manufacture of fluorescent screens and interior grids for cathode ray tubes with very high resolution may make even the slightest contamination on the surface of glass parts such. B. least Dust particles, noticeably noticeable. This danger of unwanted contaminant particles on such glass surfaces is particularly large when such Glass part one more after the usual pre-cleaning must be temporarily stored.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, gläserne Bauteile von Kathodenstrahlröhren durch eine Vorbehandlung weniger empfindlich für Staubablagerungen zu machen. The present invention is based on the object glass components of cathode ray tubes through a Pretreatment less sensitive to dust deposits close.  

Diese Aufgabe wird durch die im Kennzeichen des Patent­ anspruches 1 angegebenen Merkmale gelöst.This task is accomplished by the in the hallmark of the patent Claim 1 specified features solved.

Durch das Behandeln der für Kathodenstrahlröhren üb­ licherweise verwendeten Gläser mit einer organischen Säure der genannten Art erfolgt offensichtlich eine gewisse Imprägnierung der Gläser in der Weise, daß für kleinste Verunreinigungen, insbesondere Staubteilchen, an der Oberfläche nicht haften können. Es ist dadurch möglich, gereinigte Frontschalen von Kathodenstrahl­ röhren nach der erfindungsgemäß vorgenommenen Behand­ lung über eine längere Zeit zu lagern und dann erst in irgend einer bekannten Technik mit einer Leuchtstoff­ schicht oder einem Innenraster zu versehen. Die Gefahr, daß der Leuchtschirm Störstellen in Form von zurückge­ bliebenen Staubteilchen aufweist, ist entscheidend reduziert. Bei Innenrastern ist darauf zu achten, daß keine Unterbrechungen vorliegen; diese Unterbrechungen werden hauptsächlich durch Staubteilchen hervorgerufen.By treating those for cathode ray tubes Lichlich used glasses with an organic Acid of the type mentioned obviously occurs certain impregnation of the glasses in such a way that for smallest impurities, especially dust particles, cannot adhere to the surface. It is because of it possible, cleaned front panels of cathode ray tubes after the treatment according to the invention storage for a long time and only then in any known technique with a phosphor layer or an internal grid. The danger, that the fluorescent screen imperfections in the form of zurückge remaining dust particles is crucial reduced. With internal grids, make sure that there are no interruptions; these interruptions are mainly caused by dust particles.

Es werden bevorzugt Säuren, wie Zitronensäure, Weinsäu­ re oder Essigsäure in einer Konzentration von etwa 0,01 bis 20 Vol.% angewendet. Im Falle des Einbaus von Rastern zwischen zwei Glasscheiben erfolgt die Behand­ lung zweckmäßig mit der Oxycarbonsäure bevorzugt bei Raumtemperatur. Eine weitere bevorzugte Anwendung der Erfindung besteht darin, bei der Herstellung von Innen­ rastern für Leuchtschirme von Oszillographenröhren auch die beiden Glasscheiben, zwischen welchen die Maske­ vorlage eingebracht wird, in der erfindungsgemäßen Weise zu behandeln. Mit dieser Maskenvorlage wird eine Schicht auf der Leuchtschirmoberfläche be­ lichtet, aus der dann das gewünschte Innenraster ent­ sprechend dem Belichtungsmuster herausgewaschen wird. Evtl. vorhandene Staubteilchen zwischen diesen beiden Glasscheiben, zwischen welchen das Raster­ muster angebracht ist, wirken sich sehr störend als Fehlstellen auf der Obefläche des Leuchtschirmträgers aus, weshalb auch hier durch die Anwendung des beschrie­ benen Verfahrens eine wesentliche Verbesserung von Rasterleuchtschirmen erzielt wird.Acids such as citric acid and tartaric acid are preferred re or acetic acid in a concentration of about 0.01 up to 20 vol.% applied. In case of installation of The treatment takes place between two glass panes expediently preferred with the oxycarboxylic acid Room temperature. Another preferred application of the Invention is in the manufacture of the inside grid for fluorescent screens of oscilloscope tubes too the two panes of glass, between which the mask template is introduced in the invention Way to treat. With this mask template  is a layer on the surface of the screen clears, from which the desired internal grid then ent is washed out according to the exposure pattern. Possibly. existing dust particles between these two Panes of glass, between which the grid pattern is attached, have a very disruptive effect Flaws on the surface of the fluorescent screen support out, which is why here too by using the described procedure a significant improvement of Grid fluorescent screens is achieved.

Claims (6)

1. Verfahren zur Vorbehandlung von aus Glas bestehen­ den Bauteilen für Elektronenröhren, insbesondere von zur Beschichtung mit einem Leuchtstoff vorgesehene Frontschalen für Kathodenstrahlröhren, gekennzeichnet durch die Behandlung mit einer organischen Säure, wie Zitronensäure, Weinsäure oder Essigsäure.1. Process for the pretreatment of glass consist of the components for electron tubes, in particular of front shells provided for coating with a phosphor for cathode ray tubes, characterized by the treatment with an organic acid, such as citric acid, tartaric acid or acetic acid. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das gläserne Bauteil nach Durchführung üblicher Reinigungsverfahren mit einer 0,01%igen bis 20%igen, insbesondere etwa 5%igen organischen Säure behandelt wird.2. The method according to claim 1, characterized in that that the glass component is more common after implementation Cleaning process with a 0.01% to 20%, especially treated about 5% organic acid becomes. 3. Verfahren nach Anspruch 1 oder Anspruch 2, dadurch gekennzeichnet, daß die Behandlung durch Waschen oder Sprühen vorgenommen wird.3. The method according to claim 1 or claim 2, characterized characterized in that the treatment by washing or Spraying is made. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Behandlung mit der organischen Säure bevorzugt bei Zimmertemperatur vorgenommen wird. 4. The method according to any one of claims 1 to 3, characterized characterized that the treatment with the organic Acid is preferably made at room temperature.   5. Verfahren nach einem der Ansprüche 1 bis 4, gekenn­ zeichnet durch die Verwendung bei der Vorbehandlung von Glasscheiben,zwischen welche eine Belichtungsmaske zur photomechanischen Herstellung eines Innenrasters für eine Oszillographenröhre eingelegt wird.5. The method according to any one of claims 1 to 4, characterized characterized by the use in the pretreatment of Glass panes, between which an exposure mask for Photomechanical production of an internal grid for an oscillograph tube is inserted. 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß als organische Säure eine Oxycar­ bonsäure verwendet wird.6. The method according to any one of claims 1 to 5, characterized characterized in that as organic acid an Oxycar bonic acid is used.
DE19853540247 1985-11-13 1985-11-13 Method for pre-treating glass components for cathode-ray tubes Withdrawn DE3540247A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19853540247 DE3540247A1 (en) 1985-11-13 1985-11-13 Method for pre-treating glass components for cathode-ray tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853540247 DE3540247A1 (en) 1985-11-13 1985-11-13 Method for pre-treating glass components for cathode-ray tubes

Publications (1)

Publication Number Publication Date
DE3540247A1 true DE3540247A1 (en) 1987-05-14

Family

ID=6285880

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853540247 Withdrawn DE3540247A1 (en) 1985-11-13 1985-11-13 Method for pre-treating glass components for cathode-ray tubes

Country Status (1)

Country Link
DE (1) DE3540247A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053478A1 (en) * 1997-05-23 1998-11-26 Asahi Glass Company Ltd. A cathode ray tube glass, a method for producing the cathode ray tube glass, and a method for cleaning the cathode ray tube glass

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998053478A1 (en) * 1997-05-23 1998-11-26 Asahi Glass Company Ltd. A cathode ray tube glass, a method for producing the cathode ray tube glass, and a method for cleaning the cathode ray tube glass
US6800344B2 (en) 1997-05-23 2004-10-05 Asahi Glass Company Ltd. Cathode ray tube glass, a method for producing the cathode ray tube glass, and a method for cleaning the cathode ray tube glass

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