EP0838832A1 - Procédé de fabrication d'un dispositif à émission de champ sous vide et appareils pour la mise en oeuvre de ce procédé - Google Patents
Procédé de fabrication d'un dispositif à émission de champ sous vide et appareils pour la mise en oeuvre de ce procédé Download PDFInfo
- Publication number
- EP0838832A1 EP0838832A1 EP97402526A EP97402526A EP0838832A1 EP 0838832 A1 EP0838832 A1 EP 0838832A1 EP 97402526 A EP97402526 A EP 97402526A EP 97402526 A EP97402526 A EP 97402526A EP 0838832 A1 EP0838832 A1 EP 0838832A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- getter
- hydrogen
- enclosure
- sealing
- valve
- 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.)
- Granted
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Classifications
-
- 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
-
- 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
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/18—Assembling together the component parts of electrode systems
Definitions
- the present invention relates to a generally a process for manufacturing a device using an electron source to microtips ("microtips”) and more particularly a method of manufacturing an emission device field, i.e. a flat screen for viewing by cathodoluminescence excited by field emission, or cold emission, using microtips.
- microtips an electron source to microtips
- FEDs Field Emission Displays
- the invention relates to a manufacturing process which makes it possible to generate, control and maintain a hydrogen pressure inside the device, this pressure being able to be included in the range going from approximately 10 -5 Pa to approximately 1 Pa.
- Microtip screens are tubes flat cathodes which operate under vacuum.
- These screens include a cathode (formed including cathode conductors, grids and microtips) and an anode (formed of conductors and luminophores).
- the lifetime of the cathodes (linked to the fall in electron current as a function of time) very much depends on the quantity and nature of the gases residuals present in such a screen.
- the very flat screen structure means that its volume and conductance are very low.
- the degassing which essentially comes from the anode by the effect of electronic bombardment, is very dependent on the nature of the phosphors (“phosphors”) that the anode comprises.
- Reducing gases, and in particular hydrogen have a very clear tendency to improve emissivity, all the more so when the hydrogen pressure is higher, at least up to the range from about 10 -1 Pa to about 1 Pa.
- Degraded cathodes brought together of partial pressure of hydrogen, find quickly their initial emissivity and even a higher emissivity than the latter.
- Hydrogen helps to conserve or even improve the metallic state of the microtips.
- the authors of the present invention studied the effects of hydrogen in field emission devices by subjecting such a device (flat screen), while it was in operation and in dynamic pumping, to a controlled flow of hydrogen. allowing to maintain in the device a hydrogen pressure of the order of 10 -5 Pa to 5x10 -2 Pa.
- the hydrogen pressures which are necessary to stabilize the cathodes depend on the phosphors used and range from approximately 10 -5 Pa to approximately 1 Pa.
- a device with field emission is closed and maintained under vacuum thanks to an element known as a getter, as it turns out made for conventional cathode ray tubes.
- a getter is a metallic element which, once activated under vacuum by heating, is likely to fix the gases desorbed by the device and maintain the level of vacuum necessary for proper operation of it.
- the role of a getter is to maintain the vacuum i.e. replace a vacuum pump.
- the getter In the case of a field emission screen, the problem to be resolved is twofold: the getter must pump oxidizing gases, which is its usual role, but must also make it possible to maintain a partial pressure of hydrogen of the order from 10 -5 Pa to 1 Pa.
- SAES GETTERS S.P.A. which is specialized in the manufacturing of getters, has developed and qualified materials capable of playing this double role.
- the screen is evacuated either during the assembly phase or subsequently via a conduit called a queusot ("tail”) which is then hermetically closed.
- the getter filled with hydrogen, is heated to around 450 ° C under vacuum or in a neutral atmosphere.
- the final pressure is 4x10 -6 mbar (approximately 4x10 -4 Pa), which is generally insufficient to stabilize the emission current of the cathodes.
- the object of the present invention is to remedy the previous drawback, that is to say the loss of hydrogen during the assembly phase of the screen.
- this process including an assembly step, vacuum or controlled atmosphere, different elements of the device, this device further comprising at least a getter capable of being hydrogenated, this step assembly itself comprising a step of positioning of the different elements by compared to others, a step of steaming the device and a sealing step thereof, this process being characterized in that it further comprises a hydrogenation step of at least one getter capable of being hydrogenated, after the steaming step.
- the getters capable of being hydrogenated can optionally be combined with other more conventional types of getters such as, for example, the “ flashable ” barium getter referenced ST14 at SAES GETTERS SPA.
- This ST14 getter can be interesting for improve pumping capacity.
- the getter can be activated before the hydrogenation step. This activation can be carried out either by the steaming stage itself or after this baking stage by any means heating the getter.
- the device further comprises at least an access duct and the getter is introduced by this access duct in the device.
- the getter is preferably introduced after sealing and resetting the device to atmosphere but it can also be introduced before sealing, which can be interesting when using several queusots (see for example getter 51 in queusot 29 of Figure 4 described below).
- this process can further include a step of putting into operation temporary after the baking stage or after the baking stage hydrogenation.
- the process can further include a pump-down of the front device the closing step of it.
- getters are mentioned in the document WO 96/01492 and reference will be made to this document, and in particular on pages 7 and 8 thereof, to find examples of usable getters for the implementation of the present invention.
- This device 2 of FIG. 1 comprises a front part 4 made of glass and rear part 6 also made of glass.
- Figure 1 also shows by hatching area 10 on which the phosphors are arranged on the inner surface of the front part 4.
- Figure 2 is a perspective view schematic of the inner surface 12 of the rear part 6 of the device of FIG. 1.
- This figure 2 shows the zone 14 which is opposite zone 10, inside the device 2, and on which are placed the cathode and therefore the micro-tips.
- microelectronics techniques can reach a density of the order of tens of thousands of micro-tips per square millimeter.
- Figure 3 is a sectional view schematic cross section of device 2 which is shown in figure 1.
- This figure 3 shows the microtips 16 preferably formed on a resistive layer such that a layer of silicon 18 deposited on cathode conductors, grid electrodes 20 separated from layer 18 by layer 22 of a dielectric material, phosphors 24 and space interior 26 of device 2.
- This space must be maintained under vacuum or under a controlled atmosphere, for example hydrogen.
- the device 2 can be provided with one or more conduits called queusots ("exhaust tubes”) which are in general glass.
- a device field emission for example of the kind that has been described with reference to Figures 1 to 3, is positioned and sealed under vacuum or atmosphere controlled (e.g. an argon atmosphere) by heating at a temperature between 400 ° C and 650 ° C, for about 1 hour.
- atmosphere controlled e.g. an argon atmosphere
- This device is equipped with a queusot or of a plurality of queues.
- At least one of these channels is open.
- the sealing wall (reference 8 in FIG. 1) of the two parts of the device consists of a glass with a low melting point called "fried glass” .
- At least one specific getter not yet hydrogenated is introduced inside the queusot (or one of the queusots).
- the getters are not, however, necessarily positioned in the queues but can also be entered on the screen.
- the device is then mounted on a equipment that allows it to be pumped and steamed at about 400 ° C for several hours.
- the getter is activated, i.e. it is made able to pump oxidizing gases and adsorb a significant amount hydrogen.
- the device After returning to room temperature, the device can be operated for a few hours to degas the phosphors under a dynamic pumping (debugging phase).
- Hydrogen could also be introduced before the previous operating phase.
- the getter adsorbs this hydrogen in a time between a few minutes and an hour.
- the equilibrium hydrogen pressure can range from 10 -5 Pa to approximately 1 Pa.
- This device is then closed by closing of the open door, by local heating.
- An advantageous alternative embodiment is keep cold getters, not activated, for the baking and possibly debugging phase. So they are not unnecessarily prematurely partially saturated by the degassing flows which occur during these phases. In that case, activation is done just before hydrogenation by suitable heating means, for example using of an inductive heating which allows to heat locally the getter.
- Figure 4 is a schematic view of a apparatus according to the invention, allowing the setting in work of the first process that we have just described.
- This device provides a device with field emission completed of the type of device 2 of Figure 1.
- the device 2 is placed in a zone 48 for drying this device 2.
- the valve 34 isolates the device 2 of the pump 32 and the valve 38 makes it possible to isolate this device 2 of the tank 36.
- Hydrogen can be introduced into the tank 36 from bottle 40 and through through the needle valve 42 which allows fine-tune the hydrogen flow rate.
- the gauge 46 allows to control the pressure at the outlet of device 2 and the membrane gauge 44 measures the hydrogen pressure in the tank 36.
- This getter is for example of the kind of those which are marketed by SAES GETTERS S.P.A. under the reference St 737.
- the device 2 does not include a single rod but two lines 28 and 29 and we place respectively in these lines two getters 50 and 51.
- the queusot 29 is preferably closed with his or her getters introduced before the stage of positioning.
- the device 2 and the tank 36 are put under vacuum thanks to pump 32, valves 34 and 38 then being open and the valve 42 closed.
- Device 2 is steamed for sixteen hours at 360 ° C.
- This temperature is reached by following a temperature ramp of 1 ° C per minute.
- device 2 After cooling to the room temperature, device 2 is switched on operation (electrical test) for 20 hours.
- the tank 36 is isolated from the device 2 by closing valve 38.
- Device 2 is isolated from the pump vacuum 32 by closing valve 34.
- the valve 42 is open.
- Hydrogen is introduced into the tank 36 at a pressure of 470 Pa.
- the valve 42 is closed.
- valve 38 is then open and the hydrogen is adsorbed by the getters.
- the device 2 and the tank 36 are re-vacuumed for approximately 5 minutes per opening of valve 34.
- the device 2 is then definitively closed and it is separated from line 30 by closing the shank 28.
- a hydrogen pressure greater than 10 -2 Pa was measured inside the device.
- the sealing of the emission device field is of type "integral".
- This second process is such that after sealing the field emission device remains under empty unlike the previous case where, after sealing, the device is brought back to pressure atmospheric then returned to vacuum and steamed.
- the different elements of the device to field emission (plate carrying the anode, plate bearing cathode, sealing glass, getter (s) are positioned under vacuum and then steamed at a temperature of around 300 ° C to 450 ° C for one or more hours.
- getters can be hydrogenated although this does not present of interest because in any case a later step hydrogenation is required.
- the device can be fitted with one or plurality of closed queues which contain the getters.
- the device may also not include of queusot.
- the getters must be flat enough to fit inside of the field emission device on the sides of the active area of the latter, possibly in a groove in one of the glass plates of the device.
- the plate carrying the anode can be pressed against the plate carrying the cathode or being separated from it.
- the enclosure in which the field emission device is placed is brought to a hydrogen pressure of between 10 Pa and 10 5 Pa.
- This enclosure can be isolated or not from pumping means thereof.
- the getters are previously charged with a known quantity of hydrogen through appropriate means.
- the plate carrying the anode and the plate carrying the cathode are then brought into contact with one on the other (if they were not) then the field emission device (for example of the kind of that of FIGS. 1 and 3) is sealed, under the previously established hydrogen pressure at a temperature between 400 ° C and 650 ° C for about 1 hour.
- the or the getters adsorb the hydrogen trapped in the device and maintain an equilibrium pressure which mainly depends on the hydrogen pressure imposed during the sealing phase, the volume of the device as well as the amount and type of getter (s).
- the advantage of this second process according to the invention is that it allows maintain a large dose of hydrogen in the or the getters during the sealing phase by performing this under a high pressure of hydrogen.
- the device schematically represented on FIG. 5 comprises an enclosure 52 allowing steaming and assembly of the emission device field.
- This enclosure 52 is equipped with means appropriate electrical and mechanical 53 allowing this steaming and this assembly of the device.
- the apparatus of Figure 5 also includes a turbomolecular pumping group 54 which communicates with the interior of the enclosure 52 via a pipe 55 on which a valve is mounted 56.
- this device includes a 58 hydrogen bottle which communicates with inside the enclosure 52 by means of a needle valve 60 with variable flow.
- the valve 56 makes it possible to isolate the enclosure 52 of the pumping unit 54.
- the valve 60 makes it possible to introduce, so hydrogen in enclosure 52.
- the apparatus of FIG. 5 also includes a secondary gauge 62 of the type of those sold by the company Bayer Alper, which makes it possible to measure pressures ranging from 10 -9 Pa to 10 1 Pa.
- This gauge 62 makes it possible to control the vacuum in enclosure 52.
- the apparatus of FIG. 5 also includes a primary gauge 64 making it possible to measure pressures in the range from 10 Pa to 10 5 Pa.
- This gauge 64 makes it possible to measure the hydrogen pressure in enclosure 52, during sealing of the field emission device.
- the different elements of the device are set up in enclosure 52.
- the plate carrying the anode of the device is separated from the plate carrying the cathode by a distance 1 cm.
- a closed shutter 66 is welded to the back of the plate 6 carrying the cathode of the device.
- This queusot 66 contains two getters 68 per example of type St 737 mentioned above.
- a hole 70 was previously drilled in the plate 6 at the level of the queusot 66 so as to establish communication between the device and this queusot 66.
- the enclosure 52 is evacuated thanks to the pumping unit 54, the valve 56 being open and the valve 60 closed.
- the different elements of the device to field emission are steamed for 16 hours at 360 ° C.
- the plate carrying the anode and the plate carrying the cathode of the field emission device are then brought into contact with each other.
- valve 56 is closed and the enclosure 52 is filled with hydrogen by opening valve 60.
- the temperature of the enclosure is brought to 450 ° C for 1 hour to assemble the elements of the field emission device.
- valve 56 is open and hydrogen contained in enclosure 52 is pumped back.
- valve 56 is closed and the enclosure 52 is brought back to atmospheric pressure by introduction of nitrogen therein, by means suitable not shown.
- the device is then removed from enclosure 52.
- the advantage of the second method according to the invention compared to the method described in document WO 96/01492 lies in the fact that the sealing is done under a high hydrogen pressure of up to 10 5 Pa, which allows introduce and maintain in the getter (s) a sufficient quantity of hydrogen, this making it possible to maintain, in the device, an equilibrium pressure greater than about 10 -3 Pa.
- this second process is more simple than the first since it only requires one pumping step while the first conforming process the invention generally requires two.
- the secondary gauge 62 is mounted on the portion of the pipe 55, portion which is between valve 56 and the enclosure 52, and the hydrogen bottle 58 communicates with this portion of pipeline by through valve 60.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
Description
- à faire absorber à un getter une quantité suffisante et contrôlée d'hydrogène dans une enceinte spéciale,
- à introduire le getter ainsi hydrogéné dans l'écran plat avant la phase d'assemblage de cet écran, et
- à assembler l'écran en le chauffant pendant environ 20 minutes à environ 450°C.
- les alliages binaires comprenant un premier élément choisi parmi Zr et Ti et un deuxième élément choisi parmi V, Mn, Fe, Co, Ni et Cr,
- les alliages ternaires comprenant un premier élément choisi parmi Zr et Ti et des second et troisième éléments choisis parmi V, Mn, Fe, Co, et Cr.
- une canalisation,
- des première, deuxième et troisième vannes,
- des moyens de pompage aptes à communiquer avec le dispositif par l'intermédiaire de la canalisation et de la première vanne,
- un réservoir apte à communiquer avec le dispositif par l'intermédiaire de la canalisation et de la deuxième vanne,
- une source d'hydrogène apte à communiquer avec le réservoir par l'intermédiaire de la troisième vanne,
- des moyens de mesure de la pression à l'intérieur du dispositif, et
- des moyens de mesure de la pression dans le réservoir.
- une enceinte,
- des moyens d'étuvage et d'assemblage du dispositif lorsque celui-ci est placé dans l'enceinte,
- une canalisation,
- des première et deuxième vannes,
- des moyens de pompage communiquant avec l'enceinte par l'intermédiaire de la canalisation et de la première vanne,
- une source d'hydrogène communiquant avec l'enceinte par l'intermédiaire de la deuxième vanne,
- des moyens de mesure de la pression dans l'enceinte en l'absence d'hydrogène dans celle-ci, et
- des moyens de mesure de la pression dans l'enceinte lorsque de l'hydrogène a été introduit dans celle-ci.
- la figure 1 est une vue en perspective schématique d'un dispositif à émission de champ,
- la figure 2 est une vue en perspective schématique de l'arrière de ce dispositif,
- la figure 3 est une vue en coupe transversale schématique du dispositif de la figure 1,
- la figure 4 est une vue schématique d'un premier appareil pour la mise en oeuvre du procédé objet de l'invention,
- la figure 5 est une vue schématique d'un deuxième appareil pour la mise en oeuvre du procédé objet de l'invention, et
- la figure 6 est une vue en coupe transversale schématique et partielle d'un dispositif à traiter dans l'appareil de la figure 5.
- une canalisation 30 destinée à être raccordée en une extrémité 31 au dispositif 2 par le queusot 28,
- un système de pompage de type turbo-moléculaire 32 raccordé à l'autre extrémité 33 de la canalisation 30, par l'intermédiaire d'une vanne 34,
- un réservoir 36 dont le volume est égal à 0,714 litre dans l'exemple représenté et qui est raccordé, d'un côté, à cette autre extrémité 33 de la canalisation 30, par l'intermédiaire d'une vanne 38 et, de l'autre côté, à une bouteille d'hydrogène 40, par l'intermédiaire d'une vanne à aiguille 42 dont le débit est variable,
- une jauge à membrane 44 destinée à mesurer la pression dans le réservoir 36 et par exemple du type Baratron, permettant de mesurer des pressions dans la gamme allant d'environ 1 Pa à environ 103 Pa, et
- une jauge de pression 46 raccordée à l'autre extrémité 33 de la canalisation 30 (comme les vannes 34 et 38), cette jauge 46 étant par exemple du genre de celles qui sont commercialisées par la société Bayer Alper et permettant de mesurer des pressions dans la gamme allant d'environ 10-8 Pa à environ 10-1 Pa.
Claims (12)
- Procédé de fabrication d'un dispositif à émission de champ (2), ce procédé comprenant une étape d'assemblage, sous vide ou sous atmosphère contrôlée, des différents éléments du dispositif, ce dispositif comprenant en outre au moins un getter (50, 51; 68) apte à être hydrogéné, cette étape d'assemblage comprenant elle-même une étape de positionnement des différents éléments les uns par rapport aux autres, une étape d'étuvage du dispositif et une étape de scellement de celui-ci, ce procédé étant caractérisé en ce qu'il comprend en outre une étape d'hydrogénation d'au moins un getter apte à être hydrogéné, après l'étape d'étuvage.
- Procédé selon la revendication 1, caractérisé en ce qu'on effectue successivement l'étape de positionnement, l'étape de scellement, une étape de mise à l'atmosphère du dispositif (2), une étape de mise sous vide de celui-ci, l'étape d'étuvage, l'étape d'hydrogénation de chaque getter, celui-ci ayant été préalablement introduit dans le dispositif, et une étape de fermeture du dispositif.
- Procédé selon la revendication 2, caractérisé en ce que le getter est activé avant l'étape d'hydrogénation.
- Procédé selon la revendication 2, caractérisé en ce que le dispositif comprend en outre au moins un conduit d'accès (28, 29; 66) et en ce que le getter est introduit par ce conduit d'accès dans le dispositif.
- Procédé selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le getter est introduit après scellement et remise à l'atmosphère du dispositif.
- Procédé selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le getter est introduit avant scellement du dispositif.
- Procédé selon la revendication 2, caractérisé en ce qu'il comprend en outre une étape de mise en fonctionnement temporaire après l'étape d'étuvage ou après l'étape d'hydrogénation.
- Procédé selon l'une quelconque des revendications 2 et 7, caractérisé en ce qu'il comprend en outre une étape de repompage du dispositif (2) avant l'étape de fermeture de celui-ci.
- Procédé selon la revendication 1, caractérisé en ce qu'on effectue l'assemblage du dispositif dans une enceinte (52) sous vide ou sous atmosphère contrôlée, en ce qu'on effectue successivement l'étape de positionnement des différents éléments et de chaque getter, l'étape d'étuvage et l'étape de scellement et en ce qu'on introduit de l'hydrogène dans l'enceinte, en vue d'effectuer l'étape d'hydrogénation, après l'étape d'étuvage et pendant et/ou avant l'étape de scellement.
- Procédé selon l'une quelconque des revendications 1 à 9, caractérisé en ce que chaque getter à hydrogéner (50, 51; 68) est choisi parmi :les alliages binaires comprenant un premier élément choisi parmi Zr et Ti et un deuxième élément choisi parmi V, Mn, Fe, Co, Ni et Cr,les alliages ternaires comprenant un premier élément choisi parmi Zr et Ti et des second et troisième éléments choisis parmi V, Mn, Fe, Co, et Cr.
- Appareil pour la mise en oeuvre du procédé selon l'une quelconque des revendications 2 à 8, caractérisé en ce qu'il comprend :une canalisation (30),des première, deuxième et troisième vannes (34, 38, 42),des moyens de pompage (32) aptes à communiquer avec le dispositif (2) par l'intermédiaire de la canalisation (30) et de la première vanne (34),un réservoir (36) apte à communiquer avec le dispositif (2) par l'intermédiaire de la canalisation (30) et de la deuxième vanne (38),une source d'hydrogène (40) apte à communiquer avec le réservoir par l'intermédiaire de la troisième vanne (42),des moyens (46) de mesure de la pression à l'intérieur du dispositif (2), etdes moyens (44) de mesure de la pression dans le réservoir (36).
- Appareil pour la mise en oeuvre du procédé selon la revendication 9, caractérisé en ce qu'il comprend :une enceinte (52),des moyens (53) d'étuvage et d'assemblage du dispositif lorsque celui-ci est placé dans l'enceinte,une canalisation (55),des première et deuxième vannes (56, 60),des moyens de pompage (54) communiquant avec l'enceinte (52) par l'intermédiaire de la canalisation (55) et de la première vanne (56),une source d'hydrogène (58) communiquant avec l'enceinte (52) par l'intermédiaire de la deuxième vanne (60),des moyens (62) de mesure de la pression dans l'enceinte en l'absence d'hydrogène dans celle-ci, etdes moyens (64) de mesure de la pression dans l'enceinte lorsque de l'hydrogène a été introduit dans celle-ci.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9613127A FR2755295B1 (fr) | 1996-10-28 | 1996-10-28 | Procede de fabrication d'un dispositif a emission de champ sous vide et appareils pour la mise en oeuvre de ce procede |
FR9613127 | 1996-10-28 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0838832A1 true EP0838832A1 (fr) | 1998-04-29 |
EP0838832B1 EP0838832B1 (fr) | 2002-01-02 |
Family
ID=9497098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97402526A Expired - Lifetime EP0838832B1 (fr) | 1996-10-28 | 1997-10-24 | Procédé de fabrication d'un dispositif à émission de champ sous vide et appareils pour la mise en oeuvre de ce procédé |
Country Status (5)
Country | Link |
---|---|
US (1) | US6077141A (fr) |
EP (1) | EP0838832B1 (fr) |
JP (1) | JPH10255660A (fr) |
DE (1) | DE69709827T2 (fr) |
FR (1) | FR2755295B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6443789B2 (en) | 1999-04-21 | 2002-09-03 | Saes Getters S.P.A. | Device and method for introducing hydrogen into flat displays |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3896686B2 (ja) * | 1998-03-27 | 2007-03-22 | 双葉電子工業株式会社 | 真空外周器の真空方法 |
US6633119B1 (en) | 2000-05-17 | 2003-10-14 | Motorola, Inc. | Field emission device having metal hydride hydrogen source |
KR100415615B1 (ko) * | 2001-06-13 | 2004-01-24 | 엘지전자 주식회사 | 게터 조성물 및 이를 이용한 전계방출표시소자 |
FR2859202B1 (fr) * | 2003-08-29 | 2005-10-14 | Commissariat Energie Atomique | Compose piegeur de l'hydrogene, procede de fabrication et utilisations |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3552818A (en) * | 1966-11-17 | 1971-01-05 | Sylvania Electric Prod | Method for processing a cathode ray tube having improved life |
WO1996001492A1 (fr) * | 1994-07-01 | 1996-01-18 | Saes Getters S.P.A. | Procede permettant de creer et d'entretenir une atmosphere controlee dans un dispositif a emission de champ a l'aide d'un produit degazeur |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5697825A (en) * | 1995-09-29 | 1997-12-16 | Micron Display Technology, Inc. | Method for evacuating and sealing field emission displays |
US5688708A (en) * | 1996-06-24 | 1997-11-18 | Motorola | Method of making an ultra-high vacuum field emission display |
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1996
- 1996-10-28 FR FR9613127A patent/FR2755295B1/fr not_active Expired - Fee Related
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1997
- 1997-10-21 US US08/955,363 patent/US6077141A/en not_active Expired - Fee Related
- 1997-10-24 EP EP97402526A patent/EP0838832B1/fr not_active Expired - Lifetime
- 1997-10-24 DE DE69709827T patent/DE69709827T2/de not_active Expired - Fee Related
- 1997-10-27 JP JP9309493A patent/JPH10255660A/ja active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US3552818A (en) * | 1966-11-17 | 1971-01-05 | Sylvania Electric Prod | Method for processing a cathode ray tube having improved life |
WO1996001492A1 (fr) * | 1994-07-01 | 1996-01-18 | Saes Getters S.P.A. | Procede permettant de creer et d'entretenir une atmosphere controlee dans un dispositif a emission de champ a l'aide d'un produit degazeur |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6443789B2 (en) | 1999-04-21 | 2002-09-03 | Saes Getters S.P.A. | Device and method for introducing hydrogen into flat displays |
Also Published As
Publication number | Publication date |
---|---|
FR2755295B1 (fr) | 1998-11-27 |
US6077141A (en) | 2000-06-20 |
DE69709827T2 (de) | 2002-08-29 |
DE69709827D1 (de) | 2002-02-28 |
EP0838832B1 (fr) | 2002-01-02 |
JPH10255660A (ja) | 1998-09-25 |
FR2755295A1 (fr) | 1998-04-30 |
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