KR980011643A - Color Brown tolerance F.A. (FEA) electron gun and manufacturing method thereof - Google Patents

Abstract

(FEA) electron gun and a method of manufacturing the same are disclosed.

The electron gun is an FEA electronic gun having a bead glass, a field emission unit, and a control electrode group. The FEA electron gun includes a plurality of electrode pads on an upper portion of the field emission unit, One side of each electrically connected metal member is fused to the inner surface of the bead glass and the other side of each of the metal members is bonded to each lower edge of the field emission portion and a conductive elastic member is provided between a portion of each metal member and the angle And the electrode pad is connected. Accordingly, the time from when the power is applied to when the electron beam is emitted is shortened, power consumption is reduced, and uniform electron emission characteristics can be maintained.

Description

Color Brown tolerance F.A. (FEA) electron gun and manufacturing method thereof

Since this is a trivial issue, I did not include the contents of the text.

FIELD OF THE INVENTION The present invention relates to an FEA (electron gun) for a color brown tube and a method of manufacturing the same. Up to now, the electron gun used in the color cathode ray tube has been used with a thermionic cathode type electron gun requiring a separate heater. In recent years, however, a cold cathode type electron gun which does not use a heater has been developed in order to eliminate the structural disadvantages. The Field Emitter Array (FEA) electron gun of the present invention belongs to a cold cathode electron gun.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic cross-sectional view of a conventional thermionic electron gun. FIG. As shown in FIG. 1, the conventional thermoelectronic electron gun includes a bead glass 11, a cathode 12 having a heater therein, a cathode support 13 for fixing the cathode 12 to the bead glass 11, A first electrode 14 for controlling the electron emission amount of the cathode 12, a second electrode 15 for collecting electrons emitted from the cathode 12 to form a beam, a second electrode 15, And a fourth electrode 17 for accelerating an electron beam focused by the third electrode 16. The third electrode 16 and the fourth electrode 17 are disposed on the third electrode 16 and the third electrode 16, respectively. On the other hand, the cathode 12 may be supported by a metal support bonded to the bead glass 11 without being bonded to the cathode support 13 welded to the first electrode 14. [

FIG. 2 is a perspective view for explaining the combined state of the cathode and anode supports of FIG. 1; As shown in FIG. 2, the cathode 12 includes three emitters for red (R), green (G), and blue (B) inserted in a sleeve 122, A heater 123 for heating each of the emitters 121 and a holder 124 coupled to the sleeve 122. 1) includes an outer case 131 fixed to the first electrode 14 (Fig. 1), three inner cases (inner case) 13 fixed to the cathode (12 in Fig. 1) 132, and an insulator 133 filled between the outer case 131 and the three inner cases 132. The emitter 121 may be supported by various methods such as a ribbing method in addition to the sleeve 122 shown in FIG. 2, the heater 123 may be a direct heating type in which the heater 123 is inserted into the cathode 12 and the heater 123 is directly bonded to the emitter 121, ). The emitter 121 is roughly divided into an oxide type emitter and an immersion type emitter. The oxide type emitter is an emitter coated with an oxide of an alkaline earth metal on a base metal containing a reducing material. The impingement type emitter is an emitter impregnated with the electron emission material in the pores of the porous metal.

The conventional thermoelectronic electron gun has the following problems. First, the time from when the voltage is applied to the heater (123 in FIG. 2) to when the electrons are emitted from the emitter (121 in FIG. 2) is long. Therefore, in the case of a TV or a monitor using a conventional CRT cathode ray tube, the time from when the power is applied to when the screen is displayed is long. Second, the overall power consumption is large due to the driving power of the heater 123. Third, due to the non-uniformity of heat transfer, the electron emission characteristics of the three emitters 121 for red (R), green (G), and blue (B) are greatly different from each other. Fourth, as the heater 123 and its support are included, the overall length is increased. Fifth, an aging process for the emitter 121 is separately required. Sixth, the manufacturing process of the heater 123 is complicated, and the defect rate is high.

SUMMARY OF THE INVENTION An object of the present invention is to provide a FEA electron gun for a color cathode ray tube which performs cold cathodic electron emission using a field emission array without using a heater. In addition, another object of the present invention is to provide a method for efficiently manufacturing an electron gun for FEA.

FIG. 1 is a cross-sectional view of a conventional thermoelectric electron gun.

FIG. 2 is a perspective view for explaining the state of engagement between the cathode and the support in FIG. 1; FIG.

FIG. 3 is an excerpt of a cross sectional view of the FEA electron gun according to the present invention.

FIG. 4 is a plan view for explaining a method of assembling the field emission portion, the metal member, and the conductive spring member of FIG. 3;

FIG. 5 is an enlarged perspective view showing a field emission array of FIG. 4; FIG.

FIG. 6 is a cross-sectional view of one side of FIG. 5.

DESCRIPTION OF THE REFERENCE NUMERALS

31: Bead glass 32: Field emission part

33: metal member 34, 341, 342, 343, 344: conductive spring member

35: first electrode 36: second electrode

325: field emission array for red (R) 326: field emission array for green (G)

327: field emission array for blue (B) 321: gate electrode pad

322: cathode electrode pad for red (R) 323: cathode electrode pad for green (G)

324: cathode electrode pad for blue (B) 351: electric field discharge port

328: glass substrate 329: cathode electrode layer

330: field emission tip 331: silicon oxide layer

332: gate electrode layer

According to an aspect of the present invention, there is provided an FEA (electron gun) for a color brown tube, which includes a bead glass, a field emission unit, and a control electrode group, Wherein one end of each metal member electrically connected to each of the outer electrode fins is fused to an inner surface of the bead glass and the other end of each of the metal members is connected to the lower portion of the field emission unit And the conductive elastic member connects a part of each of the metal members to each of the electrode pads.

According to another aspect of the present invention, there is provided a method of manufacturing an electron gun, the method comprising the steps of: forming a field emission unit, a control electrode group, and a collar brown tube for forming a bead glass; A method of manufacturing an electron gun, the method comprising: forming each electrode pad on an upper portion of the field emission portion; Bonding one side of each metal member to a lower portion of the field emission portion; Bonding each of the conductive elastic members to the respective metal members in a state in which one end of each conductive elastic member presses the electrode pads; And fusing another side of each of the metal members to the bead glass.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

3 is an excerpted cross-sectional view of the FEA electron gun according to the present invention. As shown in Fig. 3, the FEA electron gun of this embodiment includes a bead glass 31; Three field emitter arrays for red (R), green (G) and blue (B) are formed on a substrate, and a common gate electrode pad and a red (R) A field emission portion 32 provided with a cathode electrode pad for red (Cathode), a cathode electrode pad for green (G), and a cathode electrode pad for blue (B); One side of which is welded to the inner surface of the bead glass 31 and the other side of which is the four metal members 33 attached to the lower edge of the field emission portion 32; A conductive spring member (34) whose one end is welded to a part of each of the metal members (33) while the other end is in a state of pressing the electrode pads; A first electrode (35) for concentrating an electron beam from the field emission portion (32); And a second electrode 36 for accelerating the electron beam focused by the first electrode 35.

Compared with the thermionic electron gun shown in Fig. 1, a first electrode (14 in Fig. 1) for controlling the electron emission amount and a second electrode (14 in Fig. 1) for focusing the electrons emitted from the cathode 12 to form a beam And the electrons emitted from the cathode 12 to perform these functions.

FIG. 4 is a plan view for explaining a method of assembling the field emission portion, the metal member, and the conductive spring member of FIG. 3; First, a red (R) field emission array 325, a green (G) field emission array 326, and a blue (B) field emission array 327 are formed on a substrate to fabricate the field emission portion 32 do. This forming process is performed by a thin film process by CVD (Chemical Vapor Deposition) and photo etching. A gate electrode pad 321, a cathode electrode pad 322 for red (R), a cathode electrode pad 323 for green (G), and a blue (B) electrode pad 323 are formed on upper edges of the field emission part 32, The cathode electrode pad 324 is formed. Here, the thickness of each of the electrode pads 321, 322, 323, and 324 is about 1 μm (micrometer). Next, one side of each metal member 33 is bonded to the lower edge of the field emission portion 32 with an appropriate adhesive. Next, one end of each conductive spring member 341, 342, 343, and 344 is electrically connected to the other end of each conductive spring member 341, 342, 343, and 344 in a state in which the electrode pads 321, 322, 323, Is welded to a part of each metal member (33). The other side of each metal member 33 may be fused to the inner surface of the bead glass (31 in Fig. 3). A fusing jig provided with four guide rods is used in the process of fusing each metal member 33 coupled with the field emission portion 32. [ That is, the positions of the field emission portion 32 and the control electrodes 35 and 36 are adjusted in a state where the guide rods are fitted in the holes formed in the metal members 33.

The support structure of the field emission portion 32 and the conductive spring member can be used to contact the outer electrode pins and the electrode pads 321, 322, 323 and 324 without directly welding thin wires. The degree of difficulty of the process can be remarkably lowered. Therefore, it is possible to improve the quality, productivity and reliability of the FEA electron gun for Color Brown.

5 is an enlarged perspective view showing the field emission array of FIG. Fig. 6 is a sectional view of one side of Fig. 5. Fig. As shown in the figure, a plurality of field emission openings 3251 are formed in the field emission array (325 or 326 or 327 in FIG. 4) of the present embodiment. The diameter of the electric field discharge port 3251 is about several micrometers. A process of forming the field emission array (325 or 326 or 327 in FIG. 4) will be schematically described as follows. First, an ITO (Indium Tin Oxide) conductive film is deposited on the glass substrate 328 to form a cathode electrode layer 329. Next, an insulating layer, for example, a silicon oxide (SiO ₂ ) layer 331 is deposited to a thickness of about several micrometers, and then a gate electrode layer 332 is deposited thereon. Next, etching is performed to form a field emission port 3251 at a predetermined position, and conical field emission tips 330 are formed therein.

When a voltage higher than 80 V (Volt) higher than the cathode electrode layer 329 is applied to the gate electrode layer 332 in the thus manufactured field emission array (325 or 326 or 327 in FIG. 4), the conical field emission tip 330 A strong electric field is formed on the top of the conical field emission tip 330, so that electron emission occurs.

The present invention is not limited to the above-described embodiment, and modifications and improvements thereof are possible on the level of those skilled in the art. For example, a silicon substrate may be used in place of the glass substrate 328.

As described above, according to the FEA electron gun for a color brown tube according to the present invention, cold cathode electron emission is performed using a field emission array without using a heater, The time until the electron beam is emitted is shortened, power consumption is reduced, and uniform electron emission characteristics can be maintained. Further, according to the FEA electronic gun for a color brown tube according to the present invention, not only miniaturization but also quality, productivity and reliability can be improved.

Claims (13)

(FEA) electron gun having a cathode, a cathode, a cathode, a cathode, a cathode, a cathode, a bead glass, a field emission part, and a control electrode group, wherein each electrode pad is provided on the electron emission part, One side of the metal member is fused to the inner surface of the bead glass and the other side of each of the metal members is bonded to each lower edge of the field emission part, and the conductive elastic member connects a part of each metal member to each electrode pad (FEA) electron gun. ≪ / RTI > The plasma display apparatus of claim 1, wherein the control electrode group comprises: a first electrode for focusing an electron beam from the field emission unit; And a second electrode for accelerating an electron beam focused by the first electrode. 2. The FEA electronic gun as claimed in claim 1, The FEA electronic gun as set forth in claim 1, wherein the substrate of the field emission portion is a glass substrate. The FEA electronic gun according to claim 1, wherein the substrate of the field emission portion is a silicon substrate. A method of fabricating an FEA electron gun for forming a field emission unit, a control electrode group, and a colored glass tube for forming a bead glass, comprising: forming each electrode pad on the field emission unit; Bonding one side of each metal member to a lower portion of the field emission portion; Bonding each of the conductive elastic members to the respective metal members in a state in which one end of each conductive elastic member compresses and attaches the electrode pads; And fusing another side of each of the metal members to the bead glass. The method of manufacturing an electron gun according to claim 1, The method of manufacturing an electron gun according to claim 5, wherein the field emission unit is formed by a CVD (Chemical Vapor Deposition) process and a photo etching process. 7. The method of claim 6, wherein the field emission unit comprises: forming a cathode electrode layer on the substrate; Depositing an insulating layer on the cathode electrode layer; Depositing a gate electrode layer on the insulating layer; Etching the gate electrode layer at a predetermined position to form an electric field discharge port; And forming field emission tips in the field emission port. The method of manufacturing an electron gun according to claim 1, The method of manufacturing an electron gun according to claim 7, wherein the substrate is made of glass. 8. The method of manufacturing an electron gun according to claim 7, wherein the substrate is made of a silicon material. 8. The method of manufacturing an electron gun according to claim 7, wherein the cathode electrode layer is an ITO (Indium Tin Oxide) conductive layer. The manufacturing method of an FEA electronic gun according to claim 7, wherein the insulating layer is a silicon oxide layer. 8. The method of manufacturing an electron gun according to claim 7, wherein the field emission tip is conical. The method as claimed in claim 5, wherein the step of fusing the other side of each of the metal members to the inner surface of the bead glass includes the steps of: (FEA) electron gun, which is characterized in that the position to be adjusted is adjusted. ※ Note: It is disclosed by the contents of the first application.