Method of making an electrode construction and electrode construction obtainable by this method

Description

[0001] Several proposals have been made on multiple electron beam type flat shaped picture display device, for example in the United States Patent Specification No. 3,935,500 and SID 78 Digest pp. 122 to 127. Furthermore, in order to obtain higher grade picture having larger number of picture elements three of the inventors of the present invention have invented and proposed a simultaneous scanning multiple electron beam type picture display apparatus described in the specification of the Japanese Patent Application Sho 53-106788 filed on August 30, 1978 (not yet examined) and also described in the specification of the United States Patent No. 4,227,117 patented on October 7, 1980. This apparatus can have very large number of the picture element in ,comparison with number of electron extracting apertures of its control electrode.

[0002] The structures of picture image display apparatus of the above-mentioned described invention is shown in Fig. 1 which is an exploded view of the principal part of the above-mentioned apparatus. The apparatus comprises, as shown from the upper part to the lower part in Fig. 1, an isolation electrode 200 having a plural number of isolation walls 201 to define oblong isolated spaces 202, a row of predetermined number M (e.g. M=₁₅) of parallel disposed 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. 10 V and electron emissive oxide coating thereon, and hereinafter is referred to as linear thermionic cathode) each being disposed in the isolated spaces 202, an extractor electrode 300 having a predetermined number N (e.g. N=107) of electron beam passing apertures 300a disposed in rows below the linear thermionic cathodes 100, a row of control electrodes 400 for controlling beam intensity disposed parallelly in a direction perpendicular to those of said linear thermionic cathodes 100 each having electron beam passing openings 400a below the apertures 300a, an electron beam forming electrode 500 having electron beam passing openings 500a below the openings 400a, a row of vertical deflection electrodes comprising pairs of common-connected first electrodes 600 and common-connected second electrodes 600', a row of horizontal deflection electrodes comprising pairs of common-connected first electrodes 700 and common-connected second electrodes 700', an electric field shielding electrode 800, an anode 900 of vapor-deposited thin aluminum film, and a phosphor screen 1000 formed on a face panel 1100 of a vacuum enclosure and under said anode 900. Every electron beams e, e ... pass through deflection spaces 620, 620 ... and 720, 720 ... defined by the deflection electrodes pairs 600, 600' ... and 700, 700' ... disposed regularly in the same order with respect to every electron beams as shown in Fig. 1.

[0003] In the operation of such multiple electron beam type flat display apparatus described in the above-mentioned specifications, 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. For example, by taking a case to display an image field raster having numbers of picture elements of 240 (in vertical direction) times 321 (in horizontal direction), with regard to the horizontal scanning of the beam spots 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. For example, when the number N of the vertical sections is 107, the number n of picture element in each section is 3. For such example, 107 beam spots are produced from each linear thermionic cathode and 107 control electrodes are provided in order to control the 107 electron beam intensities. In the apparatus, 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. In order for attaining such line-at-a-time- scanning, 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.

[0004] 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). When 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. For the above-mentioned example of the raster having the number of vertical picture element of 240, when the number M of the horizontally oblong sections is 15, each of the section has the horizontal scanning lines of a number of

That is to say, the example apparatus uses 15 linear thermionic cathodes, and each cathode vertically scans to produce 16 horizontal scanning lines.

[0005] In such picture display apparatus, as elucidated in reference to Fig. 1, a high precision structure is required in positional relations and gaps between parallel electrodes, in order to obtain accurate scanning and beam current controlling necessary for high grade picture.

[0006] In general, 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). In such construction 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.

[0007] From US-A-3 909 094 is already known a method of making a gas panel construction comprising the steps of: arranging at least a first piece of glass between opposing faces of dielectric coatings on electrode members arranged on glass plates, forming a rectangular frame as a second piece of sealing glass on said surface, and bonding said dielectric coatings by heating and pressing them to each other thereby heating to melt said second piece as bond, retaining the space defined by said first pieces in order to form a gas chamber.

[0008] It is an object of the invention to provide a method for making an electrode construction in which the electrodes are bonded with high accuracy.

[0009] This object is achieved by a method of making an electrode construction as stated in anyone of the claims 1 to 3, whereas the sub-claims refer to further improvements of this method and whereas claims 12 to 18 refer to an electrode construction obtainable by the method.

[0010] 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. Thus, 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.

Brief explanation of the drawings

[0011] 

Fig. 1 is an exploded perspective view of a general example of a multiple cathode type flat picture image display apparatus.

Fig. 2 is an exploded perspective view for elucidating a step of an example embodying the present invention.

Fig. 3 is an exploded perspective view for elucidating a step of another example embodying the present invention.

Fig. 3A is an exploded perspective view for elucidating a step of another example embodying the present invention.

Fig. 4 is an exploded perspective view for elucidating a step of another example embodying the present invention.

Fig. 4A and Fig. 4B are front views showing two examples modified from the example of Fig. 3 or Fig. 4.

Fig. 5 is an exploded perspective view for elucidating a step of another example embodying the present invention.

Fig. 6 is a front view of assembled construction of the example of Fig. 5 seen from the direction of arrow VI of Fig. 5.

Fig. 7 is a front view of a step of a part of the construction of the example of Fig. 5 seen from the direction of arrow VII of Fig. 5.

Fig. 7A is a front view of the finished state of the construction of Fig. 7.

Description of preferred embodiments

[0012] Further objects and advantages are elucidated more in detail referring to the attached drawings illustrating examples of the present invention.

[0013] In Fig. 2, 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. On a face of the first and the second electrodes 1 and 6, at the parts other than the through-holes 2, 2 ... and 7, 7 ... of the electrodes 1 and 6, respectively, pieces or strips 3, 3 ... , 8, 8 ... of a crystallizable sealing glass are formed by, for example, screen printing process. For the sealing glass, 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. On both faces of the third electrodes 4, 4..., 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. Then the strips on the other electrode, which has not yet heated, is then heated to such 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 (hereinafter, this "lower temperature" is referred to as glazing temperature).

[0014] Then, by assembling the first electrode 1, the second electrode 6 and the third electrode 4 inbetween, pressing and heating them, the pieces or strips of sealing glass which have become glaze melt and bond the electrodes or electrode members all together. In this bonding step, the previously crystallized pieces of strips, which are now hardened, serves as gap spacers to define necessary gaps between the electrodes.

[0015] 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. In this example, however, 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.

[0016] Then, 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.

[0017] Thereafter, 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. In the above-mentioned process, 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.

[0018] 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. In this case, in order to ensure reliable bonding, 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.

[0019] 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. By means of such divided strips construction, even when difference of thermal expansion coefficient between the electrode and the strips of sealing glass shows a considerable value, there is no undesirable strain or bending of each electrode and of the assembled electrode construction.

[0020] Fig. 4A is a front view of an example which is a modification of the example of Fig. 3 or Fig. 4. In the constructions 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. Then 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.

[0021] Fig. 4B is a front view of another example which is a modification of the example of Fig. 3 or Fig. 4. In this example, 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.

[0022] Fig. 5 is an exploded perspective view of another example, and 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. 450 to 500°C, thereby to crystallize and harden the sealing glass to form a first part 3 to serve as a spacer; and then 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.

[0023] Then, 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). In this bonding, 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 .... Of course, 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, ....

[0024] In case each wire electrodes are to be impressed of different voltage or signal, the hair-pin loop shaped end parts shown by the dotted line should be cut away. On the contrary, when neighboring two wire electrodes are to be impressed of the same voltage or signal as pair electrodes, the hair-pin loop shaped end parts should be left as they are.

[0025] In the bonding step by pressing and heating the electrodes 1, 6, 12a1 ... together, 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.

[0026] In the above-mentioned description, the 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.

[0027] The apertures of the electrodes 2, 7 and 5 are only one example, and may be of any form.

[0028] 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.

Claims

1. Method of making an electrode construction comprising the steps of: forming at least a first piece (3) of crystallizable sealing glass on a surface of at least one of opposing faces of electrode members (1, 4, 6), heating said first piece (3) of crystallizable sealing glass until it crystallizes for serving as spacer, forming at least a second piece (38) of sealing glass on said surface, and bonding said electrode members (1, 4, 6) by heating and pressing them to each other thereby heating to melt said second piece (38) of sealing glass as bond, without melting the first piece serving as a spacer.

2. Method of making an electrode construction according to claim 1 modified in that the second piece (38) of sealing glass is formed on the face of the other electrode (4) opposing said surface.

3. Method of making an electrode construction according to claim 1 modified in that the second piece (38) of sealing glass is formed on top of the first piece (3).

4. Method of making the electrode construction in accordance with claim 1 or 2, characterized in that said first piece (3) of crystallized sealing glass and said second piece (38) of sealing glass are formed in strip disposed on the face of said electrode member (1, 6).

5. Method of making the electrode construction in accordance with claim 1, characterized in that said second piece (38) of sealing glass is disposed neighboring aside said first piece (3) of crystallized sealing glass and said second piece (38) of sealing glass at the time prior to be heated for bonding is taller than said first piece (3) of crystallized sealing glass.

6. Method of making the electrode construction in accordance with one of the claims 1 to 5, characterized by further comprising a step of glazing said second piece (38) of crystallized sealing glass by heating it to a glazing temperature which is lower than that of crystallizing it prior to said bonding.

7. Method of making the electrode construction in accordance with claim 3, characterized in that said first piece (3) and second piece (38) of glass are formed in strip disposed on the face of said electrode member (1, 6).

8. Method of making the electrode construction in accordance with claim 7, characterized in that a first one of said electrode member (1, 6) is a metal sheet having apertures (2, 7) for passing electron beams and a second electrode member is wire electrodes (12a_l-12_C2) disposed substantially in parallel to each other and to said metal sheet.

9. Method of making the electrode construction in accordance with claim 8, characterized in that said wire electrodes (12a_l-12C₂) are of a metal having larger thermal expansion coefficient than that of said metal sheet.

10. Method of making the electrode construction in accordance with claim 9, characterized in that said second piece (38) of sealing glass is also made of crystallized sealing glass.

11. Method of making the electrode construction in accordance with one of the claims 8 to 10, characterized in that said wire electrodes (12a_l-12_C2) are hair-pin shaped wire electrodes disposed parallely to each other, and turning part of the hair-pin shaped wire electrodes (12a₁-12c₂) are cut away, thereby isolating individual parallel wire electrodes.

12. An electrode construction obtainable by the method according to anyone of the claims 1 to 11, comprising at least two electrode members (1, 6) at least a first piece (3) of crystallized sealing glass, arranged on a surface of at least one of opposing faces of said electrode members (1, 6) and serving as a spacer to define space between said electrode members (1, 6), and at least a second piece (38) of sealing glass serving as a bond between said at least two electrode members (1, 6).

13. An electrode construction in accordance with claim 12, characterized in that said second pieces (38) of sealing glass consist of crystallized sealing glass.

14. An electrode construction in accordance with claim 12 or claim 13, characterized in that between said both electrode members (1, 6) and between further first pieces (3) and second pieces (38) a metallic spacer (100) of predetermined thickness is provided.

15. An electrode construction in accordance with claim 12 or claim 13, characterized in that said first pieces (3) and said second pieces (38) are strips.

16 An electrode construction in accordance with claim 14, characterized in that said strips are intermittent strips.

17. An electrode construction in accordance with claim 12 or 13, characterized in that one of said electrode members (1, 6) is a metal plate having apertures (2, 7) for passing electron beams, and that the other said electrode members (12_ai to 12_c2) is parallel wire electrodes.

18. An electrode construction in accordance with claim 17, characterized in that said parallel wire electrodes (10_a1 to 12_c2) are hairpin shaped wire electrodes disposed in parallel with each other thus forming the parallel electrodes every two neighboring ones of which are common connected.

Ansprüche

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 (12a₁-12_C2) 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 (12a_a-12c₂) haarnadelförmige Drahtelektroden sind, die parallel zueinander so angeordnet sind, daß sie die parallelen Elektroden bilden, von denen je zwei benachbarte zusammen verbunden sind.

Revendications

1. Procédé de fabrication d'une construction d'électrode comprenant les étapes consistant à: former au moins une première pièce (3) en verre de scellement cristallisable sur une surface d'au moins l'une des faces opposées d'éléments d'électrode (1, 4, 6), chauffer cette première pièce (3) en verre de scellement cristallisable jusqu'à ce qu'elle se cristallise pour servir d'entretoise, former au moins une seconde pièce (38) en verre de scellement sur la surface, et lier les éléments d'électrode (1, 4, 6) en les chauffant et les comprimant l'un sur l'autre, d'où le chauffage jusqu'à fusion de la seconde pièce (38) en verre de scellement comme lien, sans fusion de la première pièce servant d'entretoise.

2. Procédé de fabrication d'une construction d'électrode selon la revendication 1, modifié en ce sens que la seconde pièce (38) en verre de scellement est formée sur la face de l'autre électrode (4) opposée à la surface.

3. Procédé de fabrication d'une construction d'électrode selon la revendication 1, modifiée en ce sens que la seconde pièce (38) en verre de scellement est formée sur le dessus de la première pièce (3).

4. Procédé de fabrication de la construction d'électrode selon la revendication 1 ou 2, caractérisé en ce que la première pièce (3) en verre de scellement cristallisé et la seconde pièce (38) en verre de scellement sont formées en bande disposée sur la face de l'élément d'électrode (1, 6).

5. Procédé de fabrication de la construction d'électrode selon la revendication 1, caractérisé en ce que la seconde pièce (38) en verre de scellement est disposée dans le voisinage à l'écart de la première pièce (3) en verre de scellement cristallisé et la seconde pièce (38) en verre de scellement à l'instant précédant le chauffage pour liaison est plus grande que la première pièce (3) en verre de scellement cristallisé.

6. Procédé de fabrication de la construction d'électrode selon l'une des revendications 1 à 5, caractérisé en ce qu'il comprend en outre une étape consistant à vitrifier la seconde pièce (38) en verre de scellement cristallisé en la chauffant à une température de vitrification qui est inférieure à celle de sa cristallisations avant d'effecteur le lien.

7. Procédé de fabrication de la construction d'électrode selon la revendication 3, caractérisé en ce que la première pièce (3) et la seconde pièce (38) en verre sont formées en bande disposée sur la face de l'élément d'électrode (1, 6).

8. Procédé de fabrication de la construction d'électrode selon la revendication 7, caractérisé en ce qu'un premier des éléments d'électrode (1, 6) est une tôle métallique comportant des ouvertures (2, 7) pour le passage de faisceaux électroniques et un second élément d'électrode est des électrodes en fil (12a_l-12c₂) disposées sensiblement en étant parallèles les unes aux autres et à la tôle métallique.

9. Procédé de fabrication de la construction d'électrode selon la revendication 8, caractérisé en ce que les électrodes en fil (12a_l-12c₂) sont constitués d'un métal ayant un coefficient de dilatation thermique supérieur à celui de la tôle métallique.

10. Procédé de fabrication de la construction d'électrode selon la revendication 9, caractérisé en ce que la second pièce (38) en verre de scellement est également constituée de verre de scellement cristallisé.

11. Procédé de fabrication de la construction d'électrode selon l'une quelconque des revendications 8 à 10, caractérisé en ce que les électrodes en fil (12a₁―12c₂) sont des électrodes en fil ayant la forme d'un épingle à cheveu qui sont disposées parallèlement les unes aux autres, et en ce que la partie en courbe des électrodes en fil (12a,-12c₂) en forme d'épingle à cheveu sont coupées isolant ainsi des électrodes en fil parallèles individuelles.

12. Construction d'électrode pouvant être obtenue par le procédé selon l'une quelconque des revendications 1 à 11, comprenant au moins deux éléments d'électrode (1, 6) au moins une première pièce (3) en verre de scellement cristallisé, disposée sur une surface d'au moins l'une des faces en opposition des éléments d'électrode (1, 6) et servant d'entretoise pour définit un espace entre les éléments d'électrode (1, 6) et au moins une second pièce (38) en verre de scellement servant de lien entre lesdits au moins deux éléments d'électrode (1, 6).

13. Construction d'électrode selon la revendication 12, caractérisée en ce que les secondes pièces (38) en verre de scellement sont constituées de verre de scellement cristallisé.

14. Construction d'électrode selon la revendication 12 ou la revendication 13, caractérisée en ce qu'entre les deux éléments d'électrode (1, 6) et entre d'autres premières pièces (3) et secondes pièces (38), une entretoise métallique (100) ayant une épaisseur prédéterminée est prévue.

15. Construction d'électrode selon la revendication 12, ou la revendication 13, caractérisée en ce que les premières pièces (3) et les secondes pièces (38) sont des bandes.

16. Construction d'électrode selon la revendication 14, caractérisée en ce que les bandes sont des bandes intermittentes.

17. Construction d'électrode selon la revendication 12 ou la revendication 13_; caractérisée en ce que l'un des éléments d'électrode (1, 6) est une plaque métallique comportant des ouvertures (2, 7) pour le passage de faisceaux électroniques, et en ce que les autres éléments d'électrode (12_a1 à 12_c2) sont des électrodes parallèles en fil.

18. Construction d'électrode selon la revendication 17, caractérisée en ce que les électrodes parallèles en fil (12_a1 à 12_c2) sont des électrodes en fil ayant la forme d'une épingle à cheveu disposées parallèlement les unes aux autres, formant ainsi les électrodes parallèles, toutes les deuxièmes électrodes voisines étant des électrodes connectées en commun.

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