TW494425B - Field emission display panel having dual layer cathode and the manufacturing method thereof - Google Patents

Abstract

A dual-electrode structure field emission display panel having dual layer cathode and an anode on the same glass substrate and the manufacturing method thereof are disclosed, the field emission display panel has plural electron emission piles, each electron emission pile comprises a dielectric material layer as the first conductive layer of the cathode, whose top surface and sidewall are covered with a nanotube emission layer, and a second conductive layer formed on top of the nanotube emission layer, wherein the first and the second conductive layers are long-stripe like, the second conductive layer can stop the nanotube emission layer on top of the first conductive layer from emitting electrons upward, so that the electrons emitted from the nanotube emission layer moves downward the anode on the glass substrate. The present invention can limit the electron emission direction to avoid the electrons from scattering to the neighboring pixels, thereby the display quality of the field emission display panel is improved.

Description

494425 V. Description of the invention α) [Application field of the invention] The present invention relates to a field emission display panel (Fie 1 d E missi〇η D isp 1 ay Pane 1; FEDP ane 1) structure design and manufacturing method thereof, In particular, it relates to a pseudo-emissive display panel having a double-layered cathode electrode and a positive electrode on the same substrate, and a manufacturing method thereof. BACKGROUND OF THE INVENTION In recent years, flat-panel displays have been gradually developed and applied to various electronic products such as personal computers. Dynamic matrix (ac t i v e in a t r i X) liquid crystal display is a common flat display, which can provide quite high resolution. However, due to many inherent limitations of liquid crystal displays, they are not applicable in some cases. For example, the manufacturing process of the liquid crystal display is relatively complicated, the production yield is low, and the manufacturing process needs to slowly deposit an amorphous stone layer on a glass plate, thereby reducing the productivity. In addition, the liquid crystal display needs a light backlight (b a c k 1 i g h t) module. Most of the light generated by the backlight module is not used and wasted, so the liquid crystal display needs to consume higher power. The image displayed by the liquid crystal display may not be easily seen in a high-brightness environment or a large viewing angle, and this shortcoming further limits the application space of the liquid crystal display. In order to replace the liquid crystal display, other kinds of flat display panels have been developed in recent years, and one of them is a field emission display. Field φ emission displays solve some of the shortcomings of liquid crystal display panels. Compared to traditional thin film transistor (TFT) liquid crystal display panels, field emission displays have higher contrast, larger viewing angles, higher maximum brightness, lower power consumption, and wider Operating temperature and other advantages. A larger field emission display and LCD display

Page 4 494425

V. Description of the invention (2) The difference is that the field emission display emits light by itself through the color fluorescent layer, and

It does not require the complicated and energy-consuming backlight of the LCD display (back 1 ight J and filter module. And almost all the light generated by the field emission display panel can be seen by the user. In addition, the tritium emission display does not A large thin-film transistor array is required, so the problems of high cost and low yield of liquid crystal monitors (a × ·, α ^ 1 1 V 6 matri X) can be avoided. The light-emitting principle of a field emission display is borrowed A cathode electrode emits electrons that impinge on the phosphor coated on the back of a transparent cover to produce cathode fluorescent light. This kind of light emitting method has extremely high luminous efficiency. Compared with the traditional cathode ray tube (CRT) Device, each pixel or emission unit of the field emission display panel has its own electron emission source, usually an emission microtips array. A control electrode and the cathode electrode are used. The potential difference between the two causes the electrons to be attracted and accelerates and impacts the phosphor coating. Because of the work function of the material of the sub-emission source (work f unc ti 〇n) It has a great influence on the emission, flow, and display brightness. Therefore, in order to make the field emission display = ^ to the required efficiency, the uniformity and cleanliness of the material of the electron emission source is important. Most field emission displays are internally Straight down, such as the low pressure of the scale f 10 ~ 7 torr, so it can provide a longer electron & free path) to facilitate the travel of the electron, and also prevent 1 < secondary > dyeable or Degradation.

As a field emission display panel, the molybdenum metal tip is used as the field emission cathode. Zhibo Xinggu Mbe J Fossil Xihou, Dream :: Xi: First, a thick oxygen layer was formed on the wafer on the 1st of the night, and then a metal gate layer (gate

Page 5

494425 V. Description of the invention (3) 1 ayer). The metal gate layer is then patterned to open appropriate gate openings (ga t e ope n i ng s). Then # 刻 谈 oxidized stone layer so that a silo (we 1 1) is formed at the gate opening. A layer of sacrificial material, such as a nickel metal layer, is then deposited on the gate layer to prevent the nickel metal layer from being deposited into the firing well. Then, the platinum metal is deposited in a forward incidence manner, so that a sharp cone can be deposited in the silo until the opening on the silo is closed. After removing the nickel sacrificial material layer, a conical emission tip can be obtained. Another manufacturing method of the emission tip is to form an oxide layer on a silicon layer by thermal oxidation. After patterning the oxide layer, the silicon layer is selectively etched to form silicon microtips. Then the silicon microtip is oxidized and etched again to make the microtip sharper. Microtips can also be fabricated on other suitable substrates, such as glass substrates, which are ideal substrates for making large flat display panels. The material of the microtip can be a metal conductor or a doped semiconductor material. For such a field emission display, it is very necessary to form an intermediate layer with a specific conductivity between the cathode electrode and the emission tip. An intermediate layer with proper resistivity can make the operation of the field emission display more stable. An amorphous stone layer is usually deposited during production, and the conductivity of the amorphous stone layer can be controlled between the range of the intrinsic coefficient of amorphous silicon and the conductivity of highly doped η-type (η +) amorphous silicon. . The conductivity of the amorphous silicon layer can be controlled by adjusting the content of phosphorus atoms contained in the amorphous silicon layer. Generally speaking, the field emission element needs to be contained in a vacuum cavity

494425 V. Description of the invention ^ '~ --- --- --- to avoid the meaning of vacancies Normally, the electrons emitted from the backup are not hindered during travel. The root of the cavity: reach 1 with i ΐ ί. ,? T〇rr low pressure. In addition, in order for the sloped glass to use an appropriate distance between the p-covers and not to collapse, it is usually necessary to make spacers placed on the glass substrate and the upper cover or a long-shaped support. Use. The spacer may be, for example, a glass sphere or a cross-shaped bean surface 2 (Figure 1A) is a conventional field emission element, and Figure 丨 C is a resistance # 1 A =. A resistance layer 12 is deposited on a glass substrate 14, and the electrode is an amorphous stone layer (_rph_Slllcon). An insulating layer 16 and a metal gate layer (metallic microtip 2 on the resistive layer 12 and a metal resistive sound are formed) ^ electrode structure 22 is covered by the resistive layer 12. The cladding layer 12 is a right-side pick-up of two beta substrates, such as S1022, and the edge layer 16 is too large. The resistivity of the non-anode silicon layer 12 makes the resistance not resWoVnr " The layer 12 has the function of a current limiting resistor (Umiting () to avoid overcurrent when the microtip 20 and the metal gate layer 18 are short-circuited. The gate layer should be a complete field emission The display structure 30 is as shown in "Fig. 1B". The upper part of Λ ,, and mouth structure 30 is an anode electrode 2 8. For the sake of clarity, the cathode electrode layer 22 represents the aforementioned danger zone electrode: hibiscus. + In the figure, only 20 is used to cover the resistive layer with H / 丨 and ^% π μ f. The microtip n is larger than 4¾ and emits electrons 26. The gate layer 18 is used for storage, and the anode electrode 28 is For library one ancient times + # ^

Can be plated with fluorescent particles to suppress M " more the same thing. The anode electrode 2 8 is further composed of a glass plate 36 which is a first pull 32. Refer to "篦 1C 图", -IT〇 (lnd_W " xi㈣Transparent conductive layer 32

V. Description of the invention (5) It is used to further increase the vacuum of the fluorescent display only between about 2-36, 38 (for example, "Fig. 1B, the microtip is greatly improved, and many different thin film deposits are formed. Each step of the yellow-emitting display is a step of ablation, and the yellow-light etching process is to reduce the source material of the biological emission source. One of them is shown in the second. The field emission display electrode and the field emission display of the microtubule structure show 4 4. The conductive layer 46 of the glass plate may be a conductive layer 46, a 500 // m layer of a dielectric silicon nitride, an oxynitride material layer 48 (patterned material), printed on the light agent, and the brightness when the electron 26 is bombarded. The field is 4mm thick, the lower broken substrate 14 and the uphill glass substrate X are sealed by Zhou Yuan with sidewall panels. ^% Hair emission display is compared with LCD, although it has the disadvantage that the manufacturing process is still too complicated. For example, the need for a film layer 'and, in particular, the formation of the microtip requires the use of light and engraving techniques. In order to define and manufacture such a field structure, a considerable number of photomasks (chemical vapor deposition (CVD) used in photomasking and sclerosis) and a significant increase in production costs are required. Production costs are based on microtubes (nano The tube material is used as an electric dipole or tripolar field emission display, so field emission of a polar structure has been developed. The display is shown in "Figure 2" and a female electrode and a male pen emitter are formed on the same substrate. As an electron emission source, this type of bipolar junction 40 includes a lower glass plate 42 and an upper glass plate 42. A conductive layer 46 is formed by a thick film printing technique. A conductive paste containing metal particles, such as silver paste The thick film printing technique is used to form a thickness of about 50 ° between the claw and the material layer 48. The electrical material layer may be composed of stone dioxide, stone evening or other suitable dielectric materials. After electrification, a conductive silver paste 50 (or other suitable conductive dielectric material layer 48) is applied. The thickness of the conductive silver paste 50 may be 5. Description of the invention (6) I is about 5 / Z nj to a thick film Print a range of 1 m. Then the same layer 5 2 on the conductive silver glue 50. So The technology forms a thickness of about 5 // m to m—microtube emission stacks) 60 yuan into a number of electron emission stacks (electrón em ^ tter pierced out of the carbon microtubes visible in the figure (carbon nan) 〇_tubes) 54 Thick film printing technique I The surface of the irradiated layer 5 2. The light that is also used on the conductive layer 46, for example, 2 is formed = phosphor coating layer 5 6 to emit different colors) It is charged with negative light and green light. When the cathode (that is, the conductive silver glue 50 and the upper glass plate $), the microtube emission layer 52 emits electrons 58. Repulsive force is generated at 62 :, f can form A second cathode 62 is used to travel the electrons, and 1 == toward the anode electrode layer (that is, the phosphor coating layer 56). The material of the electric second cathode 62 is, for example, ιτο. Ideally, The yang;; = the S pole: 6 attracts and is emitted by the second cathode 62 row of carbon microtubes 54 by: the emission of the top surface of the micro-guan emission layer 52, but toward the adjacent center = to some It is not directed towards the anode electrode, so that the adjacent phase element is spotted at our electrode (not shown). The field emission display is spotted in the case of color rendering. The radiograph shows the negative effects of p in color luxury and # 象 i. In order to reduce the loss of field clarity, heart and shirt image clarity, the carbon microtubes g 4 which are always on the top surface of "5 2 The emission of ψ + g must be improved. The scattering problem of the electrons 58 emitted by X must be [the purpose and overview of the invention] emission = this = the purpose of the invention is to provide-a new type of diode structure π; ρ: The panel is used to solve the above-mentioned electron scattering problem. The field emission display surface of the five-plate electrode is made of a two-pole structure according to the above purpose. The invention of Guan Fa's invention explains that Yindian Zhengyi—filling with yang & layers of yin and yin, and materials: and the electrode, the island is lost to this layer of yin | so the C of the ϋ, and π direction The following is another method for producing a display panel of the present invention: This method doubles: a glass plate, and the negative layer of the M layer and the double-layered layer are reduced to a conductive A emitting layer, and then “covered” downward. And a second conductive + kv electric glue. There is a positive electrode on a substrate according to the present invention. The field is an insulating material-grade edge board. The plurality of electrically set equal distances are opposite to each other, the electron emission stack. The top surface and the side wall are covered with electrodes formed on the lower glass plate on the top of the microtube emission layer. The cathode (dua 1-1 ayercat: l ·) 〇) is made of two conductive materials. The micro-tube emission layer between the layers is constructed, and the carbon micro-tubes surrounding the lower conductive material layer and the micro-tube emission layer by the micro-tooth are all under the plate. The purpose is to provide a new field structure of a bipolar structure. The method of forming the pen electrode and the anode electrode on the same lower glass electrode, first A dielectric material layer is formed on the conductive adhesive layer, and then a microtubule emitting layer is applied to a curing step, and the adhesive layer is hardened around the curing layer (the cure layer is Form and cover the microtube emission layer on top of the same and the first field to send a double-layer cathode emission display; multiple sub-emissions, and each sequence includes a preferred embodiment of an emission display panel, a dual-layer cathode display The panel includes a first insulating plate formed by an electron emission stack on the first insulation stack, and each of the first insulation stacks is generally parallel to a lateral direction, a dielectric material layer, and a first conductive layer in a longitudinal direction. Microtube emission layer and a second conductive layer shaped surface, wherein the first conductive layer and the second conductive layer

494425 V. Description of the invention (8) The layer system has a long shape; a plurality of conductive strips are formed in the gaps of the plurality of electron emission stacks and are separated from each other by the dielectric material layer. The conductive strip is substantially transparent material 'The plurality of conductive tapes are covered with a plurality of camping light coating tapes, and the fluorescent coating tapes can emit red, green, or blue light when excited by the electrons emitted from the microtube emission layer; a second insulating plate Placed on the first insulation plate and spaced apart from the first insulation plate; and a plurality of side wall plates are joined to the periphery of the first insulation plate and the second insulation plate so that the first insulation plate and the A closed space is formed between the second insulating plates. In the field emission display panel described above, a reflective layer may be further included between the conductive tape and the first insulating plate, and the reflective layer may be made of metal. The first insulating plate and the second insulating plate may be composed of a substantially transparent material. The first conductive layer is a cathode electrode of the field emission display panel, and the first conductive layer and the second conductive layer may be formed of a conductive paste containing metal particles. The conductive strip is the field emission display. The anode electrode of the panel, the conductive strip may be composed of indiim-tin-oxide (ITO). The microtube emitting layer may be composed of a micrometer-sized hollow tube and an adhesive. The micron-sized hollow tube may be made of carbon fiber, diamond (diamoird) fiber or diamond-like carbon (d i a m ο n d-1 i k e c a r b ο η) fiber, and the adhesive may be composed of a polymer material. Each of the fluorescent covering tapes can emit red, green, or blue light after being excited by the electrons emitted from the electron emission stack, and the adjacent fluorescent covering tapes emit light of different colors. The thickness of the dielectric material layer is between about 5 // m and about 5 0 0 // m. A field emission display panel having a dual-layer cathode and a positive electrode on the same substrate according to the present invention

494425 5. The manufacturing method of invention description (9), including the following steps, providing a first insulating plate; forming a plurality of conductive tapes on the first insulating plate, the conductive tapes are generally transparent; A dielectric layer is formed on the first insulating plate, and the dielectric layer is a plurality of strips parallel to a lateral direction of the first insulating plate; a strip-shaped first conductive layer is formed on the dielectric layer; A microtube emission layer is formed on the strip-shaped first conductive layer; the microtube emission layer is caused to flow downward to cover the side wall of the long strip-shaped first conductive layer and is cured; and the microtube emission layer is cured. A second conductive layer is formed on the top surface; a plurality of fluorescent coating tapes are formed on the plurality of conductive tapes, and each of the fluorescent coating tapes can emit red light when excited by the electrons emitted from the microtube emission layer, Green light or blue light; placing a second insulating plate on the first insulating plate and being spaced apart from the first insulating plate; and using a plurality of side wall plates with the first insulating plate and the second insulating plate The first insulation plate and the first insulation plate A closed space is formed between the two insulation plates. In the above method, the first insulating plate and the second insulating plate layer may be substantially transparent insulating material plates. The first conductive layer and the second conductive layer may be composed of a conductive paste containing metal particles. The step of forming the microtube emission layer may be forming a mixture of a micron-sized hollow tube and an adhesive on the first conductive layer by printing, wherein the micron-sized hollow tube may be selected from carbon fiber, Any of a group of diamond fibers or diamond-like carbon fibers. The above method may further include a step of connecting a negative charge to the first conductive layer and the second conductive layer, and a step of connecting a positive charge to the conductive tape. In the step of forming the plurality of conductive tapes, the material of the conductive tape may be ITO. The above method may further be included in the second

Page 12 494425 V. Description of the invention (ίο) The side of the insulating plate facing the first insulating plate is covered with a transparent electrode layer and a negative charge is connected to the transparent electrode layer. In the method described above, the fluorescent coating tape can be formed by a thick film printing technique. In order to have a clearer understanding of the features of the present invention described above, as well as other features and advantages of the present invention, it will be described in detail with reference to the drawings. But it must be explained first that the present invention may have other embodiments except for the following implementation exceptions, and the following illustrations are not necessarily drawn according to actual proportions. [Detailed description of the embodiment] A field emission display panel with a bipolar structure disclosed in the present invention has a double-layered cathode electrode and a positive electrode formed on a glass substrate. The field emission panel has a plurality of electron emission stacks. Each of the electron emission stacks is formed by sequentially stacking a dielectric material layer, a first conductive layer, a microtube emission layer, and a second conductive layer. The micro-tube emission layer is covered on the side wall of the first conductive layer, and the second conductive layer is formed on the top surface of the micro-tube emission layer. The first conductive layer and the second conductive layer may be composed of a conductive material such as a conductive adhesive. Preferably, the first conductive layer and the second conductive layer are formed into a long shape. The micro-tube emission layer is formed by first forming a micro-tube emission layer material on the top surface of the first conductive layer, and then applying a cure step to make the micro-tube emission layer material flow down while at the same time in the first A micro-tube coating layer is formed on a conductive layer sidewall. The second conductive layer covers the microtube emission layer material remaining on top of the first conductive layer, so that the microtube emission layer on the top surface of the first conductive layer cannot emit electrons. After the hardening step of the microtube emission layer, the first conductive layer is covered

Page 13 494425 ----- V. Description of the invention The side wall surface anode electrode. Towards the anode, the layer is shot on the side area of the thick-film printed glue electrode layer, and then the glue electrode glue electrode layer is made of electric silver glue, electric silver glue, and cathode electrode tube density. Layer Paste) Adhesive mixed strip dielectric several fluorescent double-layer cathode electrode 8 2

The microtubes on page (11) on page 4 are directed downward on the glass bottom plate. The electronic electrodes that can be emitted by the microtube emission layer through this new structure, and avoid facing the neighboring elements. scattering. In the device and method of the invention, the electron emission source structure can be formed using technology. For example, a first silver (thickness between about 10 / Z m and 50 // m) having a thicker thickness is formed first so that it has a larger thickness. Then, a microtubule hair is printed on the top surface of the first silver gel electrode layer. H: The hardening step causes the microtubule emission layer to flow down to the second-second-stage hardening. Then, a second silver with a smaller thickness is formed into the top of the test tube emission layer, and the micro tube that covers the top surface of the first conductive layer is emitted. Yi Di ν Ming Zhi's new structure has many electrons: The electrons that are emitted face up, (1) Eliminates the limitation of electrons to the stomach electrocardiogram: = the color clarity and contrast of the micro display panel on the side surface Acoustic. Directional emission, (4) Improving 3 pictures "shows a field emission of the present invention " designed as a two-pole structure, star # 纟, 不 not panel structure glass plate 7 4. Under the glass plate 7 2 bis is-the lower glass plate 72 is 76. The conductive material layer 76 may be formed by a conductive surface, such as silver glue. The film is formed by conductive adhesive. Powder and polymer material layer 7 8 and a plurality of long covering tapes (positive electrodes) 8 n are formed on the substrate 9 9. 9 〖8 complexes are formed between 8 long strips υ silk of the invention ρ 5. Invention Explanation (12) --- ----- Practice 疋 = thicker film forming technology on 4 dielectric material layers 7 8 '一 第一 ^ ， 酋 ^ $ 电 胶层 8 4, and then a microtube emitting layer 86 was printed on the top surface of the conductive adhesive layer 84, and then a second conductive adhesive layer 88 was printed on The top surface of the micro-injection layer θ is at the top of the surface. The upper glass plate 74 faces a surface of the lower glass plate 72, and a transparent electrode layer 90 made of ITO can be selectively formed as the second surface. A negative electrode, of course, the transparent electrode layer 90 is not required. According to the present invention, the next step is to use a temperature between about 400 ° C to about 500 ° C and about 5 A period of 30 minutes to 30 minutes (compared with 30 minutes from 4 days) is subjected to a curing process. The width of the first conductive adhesive layer 84 may be between about 50 / zm to i50 / and m can be between about 10 volt m and 50 μm. The thickness of the micro-tube emission layer 86 can be between about 5 m / m and 10 m. The width may be between about 100 / m to about 300 / zm. The height of the second conductive adhesive layer 88 may be about 5 to 10 vm, which is significantly smaller than that of the first conductive layer. The height of the adhesive layer 84. To The lower glass separation plate 72 and the upper glass plate 74 are easily evacuated, and the distance between the lower glass plate 72 and the violated glass plate 74 is about 1.1 mm. After the hardening process, Due to the characteristics of the polymer binder (Y binder) contained in the microtube emission layer 86, the microtube emission layer 86 flows downward to form a structure as shown in "Figure 4." The microtube 1 〇〇 Exposed and covered the sidewall surface of the long φ f-shaped first conductive adhesive layer 84. Because the microtubes are all directed in a downward direction during the hardening process, the electrons 98 emitted by the microtubes 1000 are all directed toward the anode electrode 80. When the IT0 transparent electrode layer 90 of the upper glass plate 74 is charged with a negative charge, the electron 98 will also be repelled.

Page 15 494425 V. Description of the invention (13) Force the electron 98 to travel down toward the anode electrode 80. The second conductive adhesive layer 88 covers the microtube emission layer remaining on the top surface of the first conductive adhesive layer 84, and prevents the microtube from emitting electrons upward. The new structure of the field emission display panel of the present invention increases the density of the microtubes on the surface of the cathode sidewall, eliminates upwardly emitted electrons, and limits the emitted electrons to the direction of the anode electrode, thereby improving the field emission display The clarity and contrast of the panel. The above are only the preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Those skilled in the art can make appropriate modifications and retouching without departing from the spirit of the present invention; All equal changes and modifications made according to the scope of patent application of the present invention are covered by the scope of patent of the present invention.

Page 16 494425 Brief Description of Drawings Figure 1A, an enlarged sectional view of a conventional field emission display element, using a microtip as an electron emission source. Fig. 1B shows the field emission display element shown in "Fig. 1A" plus a positive electrode and a side wall plate to form a closed space. Figure 1C is a partially enlarged sectional view of "Figure 1B", showing a single microtip structure. Fig. 2 is an enlarged cross-sectional view of a conventional field emission display using a micro tube emission layer as an electron emission source. Fig. 3 is an enlarged cross-sectional view of a bipolar structure field emission display of the present invention. A double-layered cathode electrode and an anode electrode are formed on the same glass substrate. Fig. 4 shows the structure of the field emission display structure of the present invention shown in "Fig. 3" after the microtube emission layer has undergone a hardening process. [Illustration of Symbols] 10 Field emission element 12 Resistive layer 14 Lower glass substrate 16 Insulation layer 18 Metal gate layer 20 Microtip 22 Female electrode 26 Electron 28 Male electrode 30 Field emission display structure

Page 17 494425 Brief description of the diagram 32 Fluorescent particles 34 Transparent conductive layer 36 Upper glass plate 38 Side wall plate 40 Field emission display 42 Lower glass plate 44 Upper glass plate 46 Conductive layer 48 Dielectric material layer 50 Conductive silver glue 52 Micro Tube emission layer 54 Carbon micro tube 56 Phosphor coating layer 58 Electron 60 Electron emission stack 62 Second cathode 70 Field emission display panel structure 72 Lower glass plate 74 Upper glass plate 76 Conductive material layer 78 Dielectric material layer 80 Fluorescent coating With 82 double-layer negative electrode 84 first conductive adhesive layer

P. 494425

Page 19

Claims (1)

494425 VI. Application for patent scope 1. A field emission display panel having a double-layer cathode and an anode on the same substrate, including at least: a first insulating plate having a vertical direction and a horizontal direction; a plurality of electron emission stacks Formed on the first insulating plate, the plurality of electron emission stacks are spaced from each other at a predetermined equal distance in the longitudinal direction, and each of the emission stacks is parallel to the horizontal direction, and each of the electron emission The stack sequentially includes: a dielectric material layer; a first conductive layer whose top surface and sidewalls are covered with a microtube emission layer; and a second conductive layer formed on top of the microtube emission layer; the first conductive layer And the second conductive layer has a long shape; a plurality of conductive tapes are formed on the first insulating plate between the plurality of electron emission stacks; a plurality of fluorescent coating tapes are formed on the plurality of conductive tapes Can emit red light, green light or blue light when excited by the electrons emitted from the emitting layer of the microtube; a second insulating plate placed on the first insulating plate and opposite to the first insulating plate A pitch; and a plurality of spacer plates, and the first insulating plate around the second insulating plate of engagement, so that the first insulating plate and the second insulating plate is formed of a closed space. 2. The field emission display panel according to item 1 of the scope of patent application, wherein the conductive tape further comprises a reflective coating formed on the conductive tape and the first insulating layer. Page 494425 6. Scope of Patent Application Between edge boards. 3. The field emission display panel according to item 2 of the scope of patent application, wherein the reflective coating is composed of metal. 4. The field emission display panel according to item 1 of the scope of patent application, wherein the first insulating plate and the second insulating plate are made of a transparent ceramic material. 5. The field emission display panel according to item 1 of the scope of patent application, wherein the first conductive layer is a cathode electrode of the field emission display panel. 6. The field emission display panel according to item 1 of the scope of patent application, wherein the first conductive layer and the second conductive layer are composed of a conductive paste containing metal particles. 7. The field emission display panel according to item 1 of the scope of patent application, wherein the conductive tape is the anode electrode of the field emission display panel. 8. The field emission display panel according to item 1 of the scope of patent application, wherein the conductive tape is composed of indium tin oxide (ITO). 9. The field emission display panel according to item 1 of the scope of patent application, wherein the microtube emission layer is formed by mixing a micrometer-sized hollow tube and a binder. 10. The field emission display panel according to item 1 of the scope of the patent application, wherein the microtube emission layer is a mixture of a micron-sized carbon hollow tube, a diamond hollow tube or a diamond-like hollow tube, and a polymer binder. 1 1. The field emission display panel described in item 1 of the scope of patent application, wherein each of the fluorescent coatings can emit red, green, or blue light when excited by electrons emitted from the electron emission stack, and Adjacent fluorescent coatings Page 21 494425 6. Scope of patent application It emits different colors of light. 1 2. The field emission display panel according to item 1 of the scope of patent application, wherein the thickness of the dielectric material layer is between 5 // m and 5 0 0 // m. 13. A method for manufacturing a field emission display panel having a double-layered cathode electrode and a positive electrode on the same substrate, comprising at least the following steps: providing a first insulating plate; forming a plurality of conductive strips on the first insulating plate; A thick film printing technique is used to form a dielectric material layer on the first insulating plate. The dielectric material layer is a plurality of strips parallel to a lateral direction of the first insulating plate. A strip is formed on the dielectric material layer. One of the first conductive layers; forming a microtube emission layer on the long strip of the first conductive layer; applying a curing process to the microtube emission layer to make the microtube emission layer toward Downstream to cover the side wall of the long strip of the first conductive layer; forming a second conductive layer on top of the microtube emission layer; forming a plurality of fluorescent coating strips on the plurality of conductive strips, each of the fluorescent coatings The belt can emit red light, green light or blue light when excited by the electrons emitted from the microtube emission layer; providing a second insulating plate placed on the first insulating plate and spaced apart from the first insulating plate; And using multiple The wall and the first insulating plate around the second insulating plate is engaged to form a sealed space between the first insulating plate and the second insulating plate. Page 22 494425 VI. Patent application scope 14. The manufacturing method of the field emission display panel described in item 13 of the patent application scope, wherein the first insulating plate and the second insulating plate are transparent glass plates. 15. The method for manufacturing a field emission display panel according to item 13 of the scope of patent application, wherein the steps of forming the first conductive layer and forming the second conductive layer include printing a conductive paste containing metal particles. Way to form. 16. The method for manufacturing a field emission display panel as described in item 13 of the scope of patent application, wherein the step of forming the microtube emission layer includes: mixing a binder and a micron-sized hollow tube by a printing method. Formed, the micron-sized hollow tube is selected from the group consisting of carbon fiber, diamond fiber and diamond-like fiber. 1 7. The method for manufacturing a field emission display panel as described in item 13 of the scope of patent application, further comprising: connecting a negative charge to the first conductive layer and the second conductive layer, and connecting a positive charge to each The conductive tape steps. 18. The method for manufacturing a field emission display panel according to item 13 of the scope of patent application, wherein the conductive tape is composed of indium tin oxide (ITO). 19. The method for manufacturing a field emission display panel according to item 13 of the scope of patent application, further comprising: forming a transparent electrode layer on a surface of the second insulating plate facing the first insulating plate, and A step of connecting a negative charge to the transparent electrode layer. 20. The method for manufacturing a field emission display panel according to item 13 of the scope of patent application, wherein the fluorescent coating tape is formed using a thick film printing technology. Page