EP0201877A2 - Corps de getter à sorption à chauffage direct - Google Patents

Corps de getter à sorption à chauffage direct Download PDF

Info

Publication number
EP0201877A2
EP0201877A2 EP86106341A EP86106341A EP0201877A2 EP 0201877 A2 EP0201877 A2 EP 0201877A2 EP 86106341 A EP86106341 A EP 86106341A EP 86106341 A EP86106341 A EP 86106341A EP 0201877 A2 EP0201877 A2 EP 0201877A2
Authority
EP
European Patent Office
Prior art keywords
getter
directly heated
mass
insulating body
sorption
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.)
Ceased
Application number
EP86106341A
Other languages
German (de)
English (en)
Other versions
EP0201877A3 (fr
Inventor
Heinrich Feller
Manfred Dr. Kobale
Peter Ing. Fh Mammach
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.)
Nokia Deutschland GmbH
Original Assignee
Nokia Graetz GmbH
Siemens 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 Nokia Graetz GmbH, Siemens Corp filed Critical Nokia Graetz GmbH
Publication of EP0201877A2 publication Critical patent/EP0201877A2/fr
Publication of EP0201877A3 publication Critical patent/EP0201877A3/fr
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/02—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by absorption or adsorption
    • 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
    • H01J29/94—Selection of substances for gas fillings; Means for obtaining or maintaining the desired pressure within the tube, e.g. by gettering

Definitions

  • the invention relates to a directly heated sorption getter body according to the preamble of claim 1.
  • Getter sorption pumps with at least one getter body made of non-evaporating getter material and an associated heating element are already known.
  • Such getter bodies are known, for example, from DE - PS 2204714.
  • The, 'for example, previously used zirconium-coal existing getter was heated indirectly.
  • An insulating jacket is applied between the heater and getter compound.
  • the heater - usually a tungsten coil - also serves as a carrier for the insulating jacket and getter mass.
  • the three-layer structure of the heater insulating jacket getter compound is relatively complex and also tends to crack and short circuits between the heater and getter jacket.
  • the invention has for its object to provide a directly heated sorption getter body of high capacity in a simple design.
  • the getter mass is applied directly to an insulating body.
  • the carrier including the contact points on the carrier, is coated with the getter mass. Coating can be done by brushing, dipping, spraying, screen printing, etc.
  • the getter body thus prepared is then sintered. There is a metallic connection between the electrical supply (contacts) and the getter mass. Sintering takes place in a vacuum ( ⁇ 1'0-3mbar), e.g. at 900 ° C, 30 minutes. To achieve mechanically solid sintered bodies, it is important to keep the heating rate in the vacuum furnace so low that the pressure in the system does not significantly exceed 10 -3 mbar.
  • the finished getter body is activated by direct current passage. This takes place after the getter body has been installed in the vacuum system provided for this purpose during or after the heating and pumping process. Since the specific resistance of the porous getter mass is many times greater than that of solid zircon, the current for the activation is within reasonable limits.
  • the getter layer can be made up to a few tenths of a millimeter thick, so that the capacity of getters produced in this way is significantly higher than that of conventional area getters.
  • the sorption getter body shown in FIG. 1 consists of an insulating body 1 which is provided with two electrical contacts 2.
  • the getter mass 3 is applied to the insulating body 1 serving as a carrier and the contact points 4.
  • an aluminum oxide rod with a diameter of one millimeter and a length of 45 mm is used as the insulating body 1, to which molybdenum tabs (contacts 2) are fixed by spot welding.
  • the getter mass 3 preferably consists of a mixture of zirconium powder with a grain size of approx. 5 ⁇ m and ammonium bikarbaminate (96 4% by weight) in a binder solution, for example of collidium wool, which is dissolved in butyl acetate or isobutanol.
  • the getter mass 3 is applied evenly to the insulating body 1 and the contact points 4 (connecting flanges).
  • the mass is first dried for a few hours at room temperature or about ten minutes at 50 ° C.
  • the heating rate for the sintering process is controlled by the pressure in the vacuum furnace. At a speed of 5 0 C / min. the pressure of 10-3mbar is not exceeded using common evacuation systems.
  • the sintering temperature is 900 ° C and is held for twenty minutes. Cooling continues under vacuum to at least 80 ° C.
  • the insulating body 1 of which consists of beryllium oxide shows a slotted ring as the sorption getter body, the insulating body 1 of which consists of beryllium oxide.
  • the getter mass 3 is applied to this insulating body 1 and its contact points 4 of the contacts 2.
  • an aluminum oxide plate is used as the insulating body 1, the dimensions of which are, for example, 20 ⁇ 20 ⁇ 0.5 mm.
  • the contacts 2 consist of molybdenum and the contact points 4 (electrical connection areas) of a palladium-containing baking paste.
  • the getter mass 3 is then e.g. preferably applied in a meandering manner by screen printing. The sintering takes place as in the other exemplary embodiments.
  • the contacts 2, in this embodiment consisting of molybdenum contact tabs, are connected by spot welding to the contact points 4, that is to say the connection region on the plate.
  • An embodiment variant of the ribbon fixation is the brazing of the contacts 2 (Mo contact tabs) with the contact points 4 produced by baking paste, that is to say the electrical connection surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Gas-Filled Discharge Tubes (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
EP86106341A 1985-05-09 1986-05-07 Corps de getter à sorption à chauffage direct Ceased EP0201877A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3516786 1985-05-09
DE3516786 1985-05-09

Publications (2)

Publication Number Publication Date
EP0201877A2 true EP0201877A2 (fr) 1986-11-20
EP0201877A3 EP0201877A3 (fr) 1987-11-19

Family

ID=6270312

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106341A Ceased EP0201877A3 (fr) 1985-05-09 1986-05-07 Corps de getter à sorption à chauffage direct

Country Status (2)

Country Link
US (1) US4835441A (fr)
EP (1) EP0201877A3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900036A1 (de) * 1989-01-03 1990-07-05 Nokia Unterhaltungselektronik Verfahren zum aufbringen eines getters in einer flachbildroehre

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734226A (en) * 1992-08-12 1998-03-31 Micron Technology, Inc. Wire-bonded getters useful in evacuated displays
US5778682A (en) * 1996-06-20 1998-07-14 Mitel Corporation Reactive PVD with NEG pump
US5898272A (en) * 1997-08-21 1999-04-27 Everbrite, Inc. Cathode for gas discharge lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB657202A (en) * 1948-02-25 1951-09-12 Rca Corp Non-alloying zirconium coating material
NL278453A (fr) * 1961-05-15
US3620645A (en) * 1970-05-01 1971-11-16 Getters Spa Getter device
DE2204714C3 (de) * 1972-02-01 1979-10-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zum Herstellen von Getterkörpern
US4045703A (en) * 1975-03-06 1977-08-30 Tokyo Shibaura Electric Co., Ltd. Flat envelope type fluorescent character indicating tube with getter shield plate
US4303847A (en) * 1979-06-22 1981-12-01 Lucitron, Inc. Flat-panel display with gas-impervious metallic sheet forming part of sealed enclosure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3900036A1 (de) * 1989-01-03 1990-07-05 Nokia Unterhaltungselektronik Verfahren zum aufbringen eines getters in einer flachbildroehre
DE3900036C2 (de) * 1989-01-03 1998-04-09 Nokia Deutschland Gmbh Getter-Anordnung für Flachbildröhren

Also Published As

Publication number Publication date
US4835441A (en) 1989-05-30
EP0201877A3 (fr) 1987-11-19

Similar Documents

Publication Publication Date Title
EP0226901A2 (fr) Procédé de fabrication de bandes de contact, en particulier sur des vitres et vitres ainsi obtenues
DE19951752B4 (de) Elektrische Druckkontaktvorrichtung und Verfahren zu ihrer Herstellung
DE3106368C2 (de) Gleichstrom-Gasentladungsanzeigevorrichtung
DE3149910A1 (de) Vorrichtung zur kathodenzerstaeubung von mindestens zwei verschiedenen materialien
DE2719660A1 (de) Steuergitter fuer eine elektronenquelle, damit ausgestattete elektronenquelle und verfahren zu deren herstellung
DE2522243A1 (de) Fluoreszierende anzeigevorrichtung
DE3050460C2 (de) Elektrische Blitzlampe
EP0138082A1 (fr) Dérivateur à décharge dans un gaz et méthode de fabrication
DE2445626C2 (de) Varistor
EP0142765A2 (fr) Méthode pour la fabrication d'un dispositif d'affichage et dispositif d'affichage fabriqué selon cette méthode
EP0201877A2 (fr) Corps de getter à sorption à chauffage direct
EP0888634A1 (fr) Lampe a decharge basse pression
DE3106763C2 (de) Verfahren zur Herstellung eines Überspannungsableiters mit bariumhaltiger Elektrodenbeschichtung
DE69313399T2 (de) Vacuumröhre mit keramischem Teil
DE212021000252U1 (de) Gasentladungsröhre
DE4236538A1 (de) Gekapselte Funkenstrecke
EP0588201B1 (fr) Lampe à décharge haute pression et procédé pour la fabrication d'une lampe à décharge à haute pression
DE3888882T2 (de) Verfahren zum Herstellen einer Nachlieferungskathode.
DE69200647T2 (de) Elektrodenlose Niederdrucknatriumdampfentladungslampe.
DE1242282B (de) Verfahren zur Herstellung eines aus Metall- und Isolierstoffschichten bestehenden Traegers fuer gedruckte Schaltungen
DE838167C (fr)
EP0162135A2 (fr) Dispositif d'affichage et méthode de fabrication
EP0220396B1 (fr) Cathodes à chauffage indirect du type à réserve pour enceintes de décharge électriques
DE3245167C2 (fr)
DE2201832A1 (de) Geraet zur Erzeugung von Elektronenstrahlen hoher Stromdichte

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR GB IT NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR GB IT NL

17P Request for examination filed

Effective date: 19871223

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: STANDARD ELEKTRIK LORENZ AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19880513

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NOKIA GRAETZ GESELLSCHAFT MIT BESCHRAENKTER HAFTUN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19890717

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MAMMACH, PETER, ING. FH

Inventor name: FELLER, HEINRICH

Inventor name: KOBALE, MANFRED, DR.