EP0050294B1 - Verfahren zum Herstellen einer Elektrodenanordnung und durch dieses Verfahren herstellbare Elektrodenanordnung - Google Patents

Verfahren zum Herstellen einer Elektrodenanordnung und durch dieses Verfahren herstellbare Elektrodenanordnung Download PDF

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Publication number
EP0050294B1
EP0050294B1 EP19810108245 EP81108245A EP0050294B1 EP 0050294 B1 EP0050294 B1 EP 0050294B1 EP 19810108245 EP19810108245 EP 19810108245 EP 81108245 A EP81108245 A EP 81108245A EP 0050294 B1 EP0050294 B1 EP 0050294B1
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EP
European Patent Office
Prior art keywords
electrode
piece
sealing glass
accordance
making
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
EP19810108245
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English (en)
French (fr)
Other versions
EP0050294A1 (de
Inventor
Masanori Watanabe
Kinzo Nonomura
Yoshinobu Takesako
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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
Priority claimed from JP55147219A external-priority patent/JPS5769651A/ja
Priority claimed from JP15861380A external-priority patent/JPS5782931A/ja
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0050294A1 publication Critical patent/EP0050294A1/de
Application granted granted Critical
Publication of EP0050294B1 publication Critical patent/EP0050294B1/de
Expired legal-status Critical Current

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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
    • H01J9/02—Manufacture of electrodes or electrode systems
    • H01J9/18—Assembling together the component parts of electrode systems
    • H01J9/185—Assembling together the component parts of electrode systems of flat panel display devices, e.g. by using spacers
    • 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
    • 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
    • H01J29/028—Mounting or supporting arrangements for flat panel cathode ray tubes, e.g. spacers particularly relating to electrodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2329/00—Electron emission display panels, e.g. field emission display panels
    • H01J2329/86—Vessels
    • H01J2329/8625—Spacing members

Definitions

  • Fig. 1 is an exploded view of the principal part of the above-mentioned apparatus.
  • M predetermined number
  • linear thermionic cathodes 1 i.e., line cathodes, each of which comprises a linear filament line to be heated by a low voltage, e.g., D.C.
  • scannings of beam spots on the phosphor screen are made in the known line-at-a-time type scanning, wherein ordinary time-sequential image signal is converted into a plural number of parallel signals.
  • the raster is divided into a plural number N of vertically oblong sections, wherein the horizontal scannings are carried out parallelly in all of N sections. Then, each section has picture elements of in the horizontal direction.
  • the horizontal scanning is made by using saw-tooth wave having a horizontal scanning period H applied to the horizontal deflection electrode and in a manner that all the N beam spots are deflected simultaneously to scan in the same direction taking one horizontal scanning period H.
  • the horizontal scanning period H is equal to the horizontal scanning period of the ordinary time sequential television signal.
  • the ordinary time sequential image signal is preliminarily converted into the N parallel signals of the line-at-a-time type, each signal thereof comprising time sequential elements for three picture data.
  • the vertical scanning of the described apparatus is made by dividing the raster into a plural number M of horizontally oblong sections, and at first in the first section, for example in the uppermost section, the plural number of beam spots, which simultaneously scan, also scan vertically (downwards).
  • the vertical scanning in the first section is over and all the beam spots reach the bottoms of the first horizontally oblong sections, then the forming of electron beams from the electron from the first linear thermionic cathode ends and the forming of electron beams from the electrons from the second linear thermionic cathode starts, and the vertical scannings of the beam spots start in the second horizontally oblong section and scan downwards in the same way as in the first section.
  • the vertical scanning is made thus downwards to the bottom or M-th section by applying a saw-tooth wave having a period where V is the vertical scanning period of the ordinary television signal.
  • V is the vertical scanning period of the ordinary television signal.
  • the electrodes other than cathodes of such flat type picture display apparatus are made of Ni-Cr-Fe alloy, and these electrodes have considerable sizes and are assembled with predetermined narrow gaps by utilizing insulating gap spacer substrates of glass or ceramic, and bonding of the above-mentioned members are made by using sealing glass (i.e., low melting temperature glass frit).
  • sealing glass i.e., low melting temperature glass frit
  • punching on the insulating gap spacer of glass or ceramic requires difficult and rather expensive working, and furthermore, such glass or ceramic substrate has different thermal expansion coefficient from the electrode material inducing strain or crack of such insulating gap spacer substrate, leading to unstable or unreliable operations of the display apparatus.
  • the bonding is made by using two parts of crystallizable sealing glass, namely a first part applied on an electrode and fired to crystallize to form hardened spacer, and a second part applied on the electrode, on a second electrode or on the first part, the second part bonding the electrodes.
  • the bonded electrode construction includes a plurality of electrodes, insulating gap spacers of first part of crystallizable sealing glass spacing a predetermined gap between the electrodes and bond of second part of crystallizable sealing glass bonding the electrodes.
  • a first electrode 1 and a second electrode 6 having oblong through holes 2,2... and 7, 7..., respectively, are to be assembled with a plural of oblong third electrodes 4, 4... having corresponding oblong through-holes 5, 5... inbetween.
  • These first electrode 1, second electrode 6, and third electrode 4 are made of Ni-Cr-Fe alloy.
  • These members are not necessarily limited to the electrodes per se, but may be any auxiliary or related member thereof, for example, supporting frame or current feeding conductor, or the like, and therefore, the word “electrode” should be taken as "electrode member” which includes the electrode as well as the above-mentioned auxiliary or related members.
  • pieces or strips 3, 3 ... , 8, 8 ... of a crystallizable sealing glass are formed by, for example, screen printing process.
  • a glass frit having a low-melting point for example, 7575W (name of good, produced and sold by Iwaki Glass Co., Ltd. of Tokyo Japan) is used.
  • pieces or strips 38, 38... of crystallizable sealing glass are formed similarly to the above-mentioned strips and at the parts to correspond thereto.
  • strips on either of the first and the second electrode 1, 6 or the third electrodes 4, 4 ... are then heated to such a "high temperature” that the crystallizable sealing glass of the glass frit 3, 8 or 38 heated thereby become crystallized (hereinafter this "high temperature” is referred to as “crystallizing temperature”). After such heating, the sealing glass is irreversibly crystallized, and the crystalline structure is retained even when the temperature is brought down or further raised.
  • glazing temperature a "lower temperature” that the crystallizable sealing glass therein becomes a glaze, but not yet crystallized, and therefore will be crystallized at subsequent heating to or over the crystallizing temperature
  • the previously crystallized pieces of strips, which are now hardened, serves as gap spacers to define necessary gaps between the electrodes.
  • Fig. 3 shows a step of another example embodying the present invention, wherein a plural number of oblong electrodes 4, 4 ... are to be bonded in insulated relation on a first electrode 1.
  • the electrodes 4, 4... and 1 are similar to those of the first example.
  • each of the strips of the sealing glass comprises first parts 3 formed directly on the first electrode 1 and second parts 38 formed on the first parts 3.
  • the first parts 3 are formed by, firstly applying crystallizable sealing glass powder (for example, the 7575W of Iwaki Glass Co., Ltd.) mixed with a known vehicle containing, for example, isoamyl acetate, by means of screen printing process, and secondly, after drying the mixture, firing the sealing glass powder at the crystallizing temperature of e.g. 450 to 500°C, thereby to crystallize and harden the sealing glass.
  • crystallizable sealing glass powder for example, the 7575W of Iwaki Glass Co., Ltd.
  • the second parts 38 are applied onto the hardened strips of the first parts 3, by means of, for example, the similar screen printing process to that of the first parts 3 followed by a glazing step.
  • the same kind of crystallizable sealing glass as that of the first parts 3 is usable for the second parts 38, but different kind crystallizable sealing glass may be used.
  • the glazing of the second parts 38 is made by heating it to the glazing temperature of e.g. 350 to 380°C, thereby obtaining reversibly hardened strips which is durable to inadvertent scratching.
  • oblong electrodes 4, 4... to be bonded on the first electrode 1 are put on the latter, pressed and the above-mentioned members are heated to the crystallizing temperature of the crystallizable sealing glass of the second parts 38. Then, the crystallizable sealing glass is melt and changes to the crystallized state, and the oblong electrodes 4, 4 ... are firmly bonded to the first electrode 1 with accurate gap defined by the thickness of the first parts 3.
  • the glazing of the second parts 38 is preferable for the durability thereof, and reliability of the manufactured apparatus, but this may be dispensed with if scratching or damaging of the second parts 38 is not liable to occur.
  • Fig. 3A shows a modified example where the second parts 38 of crystallizable sealing glass are disposed at the side of the first parts 3.
  • the thickness of the second parts 38 should be thicker than the first part 3; and for other matters, descriptions for the example of Fig. 3 is similarly applicable to this example.
  • Fig. 4 shows another example, wherein different from the example of Fig. 3, the crystallizable sealing glass strips 3 and 38 are divided into short pieces, and other parts are substantially the same to the example of Fig. 3.
  • Fig. 4A is a front view of an example which is a modification of the example of Fig. 3 or Fig. 4.
  • the largest gap space obtainable by the gap spacer is about 500 um, and when a gap space larger than 500 pm, accurate and uniform gap space can not be formed.
  • the construction of Fig. 4A shows an improved construction which can afford a desirable large gap by means of cascade gap spacer construction, where a metal spacer 100 is bonded on the electrode 1 by means of the double layer construction of the crystallizable sealing glass comprising the first part 3 and the second part 38 formed by the same way as those of the examples of Fig. 3 or Fig. 4.
  • the way of Fig. 2 can be also applicable.
  • another two layers of the first part 3 and the second part 38 are formed on the metal spacer 100 in the same way, and by this latter double layered sealing glass, the electrode 4 is bonded to the spacer 100, and resultantly to the electrode 1.
  • Fig. 4B is a front view of another example which is a modification of the example of Fig. 3 or Fig. 4.
  • the positional order of the first part 3 and the second part 38 between the electrode 4 and the spacer 100 is opposite to the case of Fig. 4A.
  • This construction is made by forming the first part 3 and the second part 38 on the lower face of the electrode 4, instead of the upper face of the spacer 100.
  • Fig. 5 is an exploded perspective view of another example
  • Fig. 6 is a sectional front view of the example of Fig. 5, seen from the direction of an arrow VI of Fig. 5, wherein a row of parallel wire electrodes 12a1, 12a2, 12b1, 12b2, 12c1, 12c2, ... as electron beam control electrodes are bonded between a first electrode 1 and a second electrode 6 having oblong openings 2, 2... and 7, 7... respectively for passing ribbon shape electron beams.
  • the bonding is made by means of crystallizable sealing glass strips 15, 15, 15, ..., which are formed on the lower face of the first electrode 1 and on the upper face of the second electrode 6, at such parts other than the openings 2, 2 ... and 7, 7 ....
  • Each of the strips 15 are formed as shown by Fig. 7, which is an enlarged sectional view thereof, seen from the direction of an arrow VII of Fig. 5.
  • the strips 15, 15 ... are formed by: Firstly applying a first part 3 of crystallizable sealing glass powder (for example, the 7575W of Iwaki Glass Co., Ltd.) mixed with a known vehicle containing, for example, isoamyl acetate, by means of screen printing process, thereafter, after drying the mixture firing the sealing glass powder at the crystallizing temperature of, e.g.
  • first part 3 to serve as a spacer
  • secondly forming a second part 38 by applying on the first part 3 by means of, for example, the similar screen printing process to that of the first part 3, followed by a glazing of the second part 38 by heating it to the glazing temperature of, e.g. 350 to 380°C, thereby forming the strips 15, 15 ... having sectional construction shown by Fig. 7.
  • wires 12a1, 12a2, 12b1 ... as control electrodes are disposed at accurate positions on the electrode 6 by means of appropriate step, for example by using a suitable jig, and then the first electrode 1 and the second electrodes 6 are pressed to the wire electrodes 12a1, 12a2 ..., and the whole parts including the strips 15, 15 ... are heated, so that the glazed second parts 38, 38 ... are melted and then crystallized and hardened thereby bonding the wire electrodes and accordingly the first and second electrodes therewith, forming an assembled electrode construction as shown by Fig. 6 (seen from the direction of arrow VI of Fig. 5) and by Fig. 7A (seen from the direction of arrow VII of Fig. 5).
  • the gaps between the wire electrodes 12a1, 12a2 ... and the first or second electrode 1 or 6 is accurately defined by preliminarily hardened spacer strips 3, 3 ....
  • the first electrode 1, the second electrode 6 and the wire electrodes 12a1 ... inbetween are each other insulated by the strips 15 of crystallized sealing glass, consisting of the spacers 3, ... and the bonding layer 38, ....
  • the hair-pin loop shaped end parts shown by the dotted line should be cut away.
  • the hair-pin loop shaped end parts should be left as they are.
  • the wire electrodes 12a1, 12a2... should be held with a suitable tension so as to be bonded straight without sag. It is preferable to select the wire electrodes 12a1, 12a2, 12b1 ... having thermal expansion coefficient larger than those of the grid shaped or frame shaped first and second electrodes 1 and 6. This is for the purpose that in the finished display apparatus the wire electrodes 12a1 ... exhibit a desirable tension when cooled down to a room temperature or an an operating temperature of the display apparatus, which is sufficiently lower than the bonding (crystallizing) temperature.
  • control electrodes are taken for the examples, but the application of the present invention is not limited to the control electrodes, but is applicable to the deflection electrodes, convergence electrodes or other electrodes. Furthermore, the number of electrodes to form the electrode construction is not limited to two layers or three layers as shown by the attached drawings, but constructions having more layers of electrode can be realized by embodying the present invention.
  • the apertures of the electrodes 2, 7 and 5 are only one example, and may be of any form.
  • the electrode construction in accordance with the present invention is specially suitable in accurately assembling thin electrodes of a large size formed by photolithographic etching process.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Claims (18)

1. Verfahren zum Herstellen einer Elektrodenanordnung mit folgenden Verfahrensschritten: Bildung von wenigstens einem ersten Teil (3) aus kristallisationsfähigem Abdichtglas auf einer Oberfläche von wenigstens einer der einander gegenüberliegenden Stirnseiten von Elektrodenteilen (1, 4, 6), Erwärmen des ersten Teils (3) aus kristallisationsfähigem Abdichtglas bis zu dessen Kristallisation für die Verwendung als Abstandshalter, Bildung von wenigstens einem zweiten Teil (38) aus Abdichtglas auf der Oberfläche und das Verbinden der Elektrodenteile (1, 4, 6) dadurch, daß sie erwärmt und aneinandergepreßt werden, wobei das zweite Teil (38) aus Abdichtglas zur Bindung bis zum Schmelzen erwärmt wird, ohne daß das erste als Abstandshalter dienende Teil zum Schmelzen gebracht wird.
2. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 1, abgewandelt dahingehend, daß das zweite Teil (38) aus Abdichtglas auf der Stirnseite der anderen dieser Oberfläche gegenüberliegenden Elektrode (4) gebildet wird.
3. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 1, abgewandelt dahingehend, daß das zweite Teil (38) aus Abdichtglas oben auf dem ersten Stück (3) gebildet wird.
4. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß das erste Teil (3) aus kristallisiertem Abdichtglas und das zweite Teil (38) aus Abdichtglas als auf der Stirnseite des Elektrodenteils (1, 6) angeordnete Streifen gebildet sind.
5. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 1, dadurch gekennzeichnet, daß das zweite Teil (38) aus Abdichtglas seitlich neben dem ersten Teil (3) aus kristallisiertem Abdichtglas angeordnet ist und daß das zweite Teil (38) aus Abdichtglas vor dem Erwärmen für die Bindung größer ist als das erste Teil (3) aus kristallisiertem Abdichtglas.
6. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß einem der Ansprüche 1 bis 5, gekennzeichnet durch folgenden weiteren Verfahrensschritt: Wärmekalandrieren des zweiten Teils (38) aus kristallisiertem Abdichtglas durch dessen Erwärmung bis zur Kalandriertemperatur, welche niedriger ist als die vorher vor dem Binden angewandte Temperatur zum Kristallisieren.
7. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 3, dadurch gekennzeichnet, daß das erste Teil (3) und das zweite Teil (38) aus Glas als auf der Stirnseite des Elektrodenteils (1, 6) angeordnete Streifen ausgebildet sind.
8. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 7, dadurch gekennzeichnet, das ein erstes der Elektrodenteile (1, 6) eine Metallplatte mit Öffnungen (2, 7) zum Durchlassen von Elektronenstrahlen ist und eine zweites Elektrodenteil im wesentlichen zueinander und zu der Metallplatte parallele Drahtelektroden (12a1-12c2) sind.
9. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 8, dadurch gekennzeichnet, daß die Drahtelektroden (12a,-12c2) aus einem Metall mit einem größeren Wärmeausdehnungskoeffizienten als der der Metallplatte hergestellt sind.
10. Verfahren zum Herstellen der Elektrodenkonstruktion gemäß Anspruch 9, dadurch gekennzeichnet, daß das zweite Teil (38) aus Abdichtglas ebenfalls aus kristallisiertem Abdichtglas hergestellt ist.
11. Verfahren zum Herstelling der Elektrodenkonstruktion gemäß einem der Ansprüche 8 bis 10, dadurch gekennzeichnet daß die Drahtelektroden (12a1-12C2) parallel zueinander angeordnete haarnadelförmige Drahtelektroden sind und daß das Kurventeil der haarnadelförmigen Drahtelektroden (12a,-12c2) abgeschnitten ist, wodurch einzelne isolierte parallele Drahtelektroden entstehen.
12. Eine durch das gemäß einem der Ansprüche 1 bis 11 gekennzeichnete Verfahren herstellbare Elektrodenanordnung mit wenigstens zwei Elektrodenteilen (1, 6), wenigstens einem ersten Teil (3) aus kristallisiertem Abdichtglas, angeordnet auf der Oberfläche of wenigstens einer der einander gegenüberliegenden Stirnflächen der Elektrodenteile (1, 6) und bestimmt als Abstandshalter zur Schaffung eines Zwischenraums zwischen den Elektrodenteilen (1, 6), und wenigstens einem zweiten Teil (38) aus Abdichtglas, welches zur Verbindung zwischen den wenigstens zwei Elektrodenteilen (1, 6) dient.
13. Eine Elektrodenanordnung gemäß Anspruch 12, dadurch gekennzeichnet, daß das zweite Teil (38) aus Abdichtglas aus kristallisiertem Abdichtglas besteht.
14. Eine Elektrodenanordnung gemäß Anspruch 12 oder 13, dadurch gekennzeichnet, daß zwischen den beiden Elektrodenteilen (1, 6) und zwischen weiteren ersten Teilen (3) und zweiten Teilen (38) ein metallischer Abstandhalter (100) einer vorgegebenen Dicke vorgesehen ist.
15. Eine Elektrodenanordnung gemäß Anspruch 12 oder 13, dadurch gekennzeichnet, daß die ersten Teile (3) und die zweiten Teile (39) Streifen sind.
16. Eine Elektrodenanordnung gemäß Anspruch 14, dadurch gekennzeichnet, daß die Streifen unterbrochene Streifen sind.
17. Eine Elektrodenanordnung gemäß Anspruch 12 oder 13, dadurch gekennzeichnet, daß eines der Elektrodenteile (1, 6) eine Metallplatte mit Öffnungen (2, 7) zum Durchlassen von Elektronenstrahlen ist und daß die anderen Elektrodenteile (12a,-12c2) parallele Drahtelektroden sind.
18. Eine Elektrodenanordnung gemäß Anspruch 17, dadurch gekennzeichnet, daß die parallelen Drahtelektroden (12aa-12c2) haarnadelförmige Drahtelektroden sind, die parallel zueinander so angeordnet sind, daß sie die parallelen Elektroden bilden, von denen je zwei benachbarte zusammen verbunden sind.
EP19810108245 1980-10-20 1981-10-12 Verfahren zum Herstellen einer Elektrodenanordnung und durch dieses Verfahren herstellbare Elektrodenanordnung Expired EP0050294B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP55147219A JPS5769651A (en) 1980-10-20 1980-10-20 Electrode structure
JP147219/80 1980-10-20
JP15861380A JPS5782931A (en) 1980-11-10 1980-11-10 Manufacturing method for electrode frame
JP158613/80 1980-11-10

Publications (2)

Publication Number Publication Date
EP0050294A1 EP0050294A1 (de) 1982-04-28
EP0050294B1 true EP0050294B1 (de) 1987-01-14

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EP (1) EP0050294B1 (de)
DE (1) DE3175837D1 (de)

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FR2781308A1 (fr) * 1998-07-15 2000-01-21 Thomson Plasma Procede de realisation de moyens d'entretoisement pour panneaux de visualisation

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DE3175837D1 (en) 1987-02-19
EP0050294A1 (de) 1982-04-28

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