KR20010060819A - Structure of anode substrate in fed and method for manufacturing the same - Google Patents

Abstract

PURPOSE: An anode plate structure of a field emission display device and a method for manufacturing the same are provided to reduce a manufacturing time by omitting a black matrix formation process and processes for applying, exposing, and developing fluorescent material. CONSTITUTION: An ITO(Indium Tin Oxide) layer is deposited on one surface of a substrate(11). An anode electrode(12) is formed by pattering a part of the ITO layer. A white fluorescent material(13) is applied on an upper portion of the anode electrode(12). A color filter plate(14) is adhered on the other surface of the substrate(11). The color filter plate(14) is formed with a black matrix(15), a red filter(16a), a green filter(16b), and a green filter(16c).

Description

An anode substrate structure of a field emission display device and a method of manufacturing the same TECHNICAL FIELD

The present invention relates to a field emission display device and a method of manufacturing the same, and more particularly to an anode substrate structure of the field emission display device and a method of manufacturing the same.

Field emission display devices are typically used as display panels in devices such as electron guns, microwave tubes, ion sources, scanning tunneling microscopes, and the like. Is used.

The field emission display device includes a cathode substrate including a cathode electrode, an anode substrate facing the cathode substrate and including an anode electrode, and a vacuum gap between the cathode substrate and the anode substrate. Here, the lower substrate plate is provided with a plurality of emitter tips formed before the gate and above the cathode electrode to emit electrons. On the other hand, the upper substrate is provided with an anode electrode and a phosphor on the upper portion thereof, and when electrons are emitted from the emitter tip of the lower substrate, the phosphor emits light, thereby realizing a display.

1 is a cross-sectional view illustrating an anode substrate of a general field emission display device.

Referring to FIG. 1, an indium tin oxide (ITO) layer is deposited on a surface of the anode substrate 1 opposite to a lower substrate (not shown), and then partially patterned to form an anode electrode 2. Then, an opaque metal or resin film is formed on the anode electrode 2, and then patterned into a matrix to form a black matrix 3. Then, the red phosphor is applied, and then exposed and developed so as to be disposed in the space defined by the black matrix 3 in place, thereby forming the red phosphor pattern 4a. Subsequently, the green fluorescence pattern 4b and the blue fluorescence pattern 4c are formed on the opposite surface of the anode substrate 1 on which the red fluorescence pattern 4a is formed in the same manner as the red fluorescence pattern 4a. .

However, as described above, the black matrix 3 is formed, and then the red fluorescence pattern 4a, the green fluorescence pattern 4b and the blue fluorescence pattern 4c are applied, exposed and developed, respectively. If formed as, the process step is increased, the manufacturing process time becomes longer.

Furthermore, when the black matrix 3, the red fluorescent pattern 4a, the green fluorescent pattern 4b, and the blue fluorescent pattern 4c are formed on the substrate surface by respective processes, it is difficult to align the correct position. The risk of misalignment is high.

Accordingly, an object of the present invention is to provide a method for manufacturing an anode substrate structure of a field emission display device which can shorten the manufacturing process, to solve the above-mentioned conventional problems.

Another object of the present invention is to provide a field emission display device in which misalignment does not occur.

1 is a plan view of an anode substrate structure of a conventional field emission display device

2A and 2B are cross-sectional views illustrating an anode substrate structure of a field emission display device for explaining an embodiment of the present invention.

3 and 4 are cross-sectional views showing the anode substrate structure of the field emission display device for explaining another embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

11,21-Substrate 12,22-Anode Electrode

13,23-Phosphor 14,24-Color Filter Plate

15,25-Black Matrix 16a, 16b, 16c, 26a, 26b, 26c-Color Filter

In order to achieve the above object of the present invention, in accordance with one aspect of the present invention, a substrate having two surfaces; An anode formed of a transparent conductor on one surface of the substrate; A phosphor formed on a surface of the anode electrode; And a color filter plate attached to the back surface of the substrate, the color filter plate including a black matrix and a color filter formed in a space defined by the black matrix and having a red, green, and blue color when synthesized with the color of the phosphor. .

Here, the phosphor is a white phosphor, the color filter is characterized in that the red, green, blue color filter, wherein the white phosphor is Y 2 O 2 S: Tb material, Y 2 O 2 S: Tb, Sm material, ZnS: Ag + (Zn, Cd) S: Ag material, (Ca, Mg) SiO3: Ti + CaSiO3: Pb material, ZnS: Ag + ZnS: Cu, Al material, ZnS: Ag + (Zn, Cd) S: Cu, Al material ZnSiO4: Mn ²⁺ (As) + (Zn, Mg) 3 (PO3) 2: Mn ²⁺ + ZnS: Ag material, and ZnS: Ag + ZnSiO4: Mn (As) + Y2O2S: Eu material It is a substance. The anode electrode and the phosphor are formed only in a portion corresponding to the color filters.

In addition, according to another aspect of the invention, the step of forming an anode electrode with a transparent conductor on one surface of the substrate having two surfaces; Forming a phosphor on a surface of the anode electrode; And attaching a color filter plate to a second surface of the substrate, the color filter plate including a color filter formed in a space defined by the black matrix and the black matrix and having a red, green, and blue color when synthesized with the color of the phosphor. Include.

Here, the phosphor is a white phosphor, and the color filter is a red, green, blue color filter. In this case, the white phosphor is Y2O2S: Tb material, Y2O2S: Tb, Sm material, ZnS: Ag + (Zn, Cd) S: Ag material, (Ca, Mg) SiO3: Ti + CaSiO3: Pb material, ZnS: Ag + ZnS: Cu, Al material, ZnS: Ag + (Zn, Cd) S: Cu, Al material, ZnSiO4: Mn ²⁺ (As) + (Zn, Mg) 3 (PO3) 2: Mn ²⁺ + ZnS: Ag Material and ZnS: Ag + ZnSiO 4: Mn (As) + Y 2 O 2 S: Eu material.

In addition, the white phosphor is formed by one of a screen printer method, an electrophoresis method, a polyvinylalcohol (PVA) slurry method, a precipitation method, an evaporation method, a sputtering method, and a chemical vapor deposition method. In addition, after attaching the color filter plate, the method may further include patterning a predetermined portion of the anode electrode and the phosphor so that only the portion corresponding to the color filters exists.

According to the present invention, an anode electrode and a white phosphor or a phosphor expressing a predetermined color are applied to one surface of an anode substrate and synthesized with the phosphor color on the other surface of the anode substrate to have a red, green and blue color. Attach the color filter plate. Thereby, the process of forming a black matrix and the process of apply | coating, exposing, and developing a red, green, and blue fluorescent substance respectively can be reduced, and a process is simplified.

In addition, since the color matrix having the black matrix and the red and green blue filters are attached, the alignment process is not required every time the process is performed. Accordingly, misalignment can be prevented.

(Example)

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A and 2B are cross-sectional views illustrating an anode substrate structure of a field emission display device for explaining an embodiment of the present invention, and FIGS. 3 and 4 are field emission views for explaining another embodiment of the present invention. It is sectional drawing which shows the anode substrate structure of a display element.

First, referring to FIG. 2A, an ITO layer is deposited on one surface of the substrate 11, and then a predetermined portion is patterned to form the anode electrode 12. At this time, one surface of the substrate 11 is a surface to be opposed to the lower cathode substrate (not shown). The white phosphor 13 is coated on the anode electrode 12. At this time, the white phosphor 13 is a phosphor that emits white light, as the name implies, Y2O2S: Tb material, Y2O2S: Tb, Sm material, ZnS: Ag + (Zn, Cd) S: Ag material, (Ca, Mg ) SiO3: Ti + CaSiO3: Pb material, ZnS: Ag + ZnS: Cu, Al material, ZnS: Ag + (Zn, Cd) S: Cu, Al material, ZnSiO4: Mn ²⁺ (As) + (Zn, Mg) One material selected from 3 (PO3) 2: Mn ²⁺ + ZnS: Ag material, and ZnS: Ag + ZnSiO 4: Mn (As) + Y 2 O 2 S: Eu material is used. The white phosphor 13 is formed by one of a screen printer method, an electrophoresis method, a PVA (fullname desired) slurry method, a precipitation method, an evaporation method, a sputtering method, and a chemical vapor deposition method.

Then, as shown in Fig. 2B, a color filter plate 14 used for a liquid crystal display device or the like is attached to the other surface of the substrate 11. Here, the color filter plate 14 is formed of a black matrix 15 formed in a matrix form and red, green, and blue filters 16a, 16b, and 16c, respectively, in a space defined by the black matrix 15.

Accordingly, the black matrix and the red and green blue phosphors do not need to be formed through a plurality of processes, respectively, thereby simplifying the process.

In addition, as shown in FIG. 3, in order to increase the purity of the color, after attaching the color filter plate, the anode electrode 12 and the white phosphor 13 are replaced with red, green, and blue color filters 16a, 16b, and 16c. ) May be patterned to correspond to the formed portion.

In addition, as shown in FIG. 4, the anode electrode 22 is formed on one surface of the substrate 21, and then one phosphor 23 selected from red, green, and blue is formed. At this time, in the present embodiment, the phosphor 23 is used as the green phosphor. Thereafter, the color filter plate 24 is attached to the two surfaces of the substrate 21. In this case, the color filter plate 24 includes a black matrix 25 formed in a matrix form, a first filter 26a having a red color by combining with a green color in a portion surrounded by the black matrix 25, and white. The band includes a second filter 26b and a third filter 26c that is blue in combination with the green color. In this manner, the same effects as in the above embodiment can be obtained.

As described in detail above, according to the present invention, an anode electrode and a white phosphor or a phosphor expressing a predetermined color are coated on one surface of an anode substrate, and the phosphor color is synthesized on the second surface of the anode substrate, thereby red. Attach green, blue color filters. Thereby, the process of forming a black matrix and the process of apply | coating, exposing, and developing a red, green, and blue fluorescent substance respectively can be reduced, and a process is simplified.

In addition, since it is only necessary to attach a color filter on which a black matrix and a red and green blue filter are formed, an alignment process for each process is not required. In addition, misalignment can be prevented.

In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.

Claims (9)

A substrate having two surfaces; An anode formed of a transparent conductor on one surface of the substrate; A phosphor formed on a surface of the anode electrode; And And a color filter plate attached to the back surface of the substrate, the color filter plate including a black matrix and a color filter formed in a space defined by the black matrix and having a red, green, and blue color when synthesized with the color of the phosphor. An anode substrate structure of a field emission display device. The anode substrate structure of claim 1, wherein the phosphor is a white phosphor, and the color filter is a red, green, or blue color filter. The method of claim 2, wherein the white phosphor is Y2O2S: Tb material, Y2O2S: Tb, Sm material, ZnS: Ag + (Zn, Cd) S: Ag material, (Ca, Mg) SiO3: Ti + CaSiO3: Pb material, ZnS : Ag + ZnS: Cu, Al material, ZnS: Ag + (Zn, Cd) S: Cu, Al material, ZnSiO4: Mn ²⁺ (As) + (Zn, Mg) 3 (PO3) 2: Mn ²⁺ + ZnS An anode substrate structure of a field emission display device, characterized in that the material is one selected from: Ag material and ZnS: Ag + ZnSiO 4: Mn (As) + Y 2 O 2 S: Eu material. The anode substrate structure of any one of claims 1 to 3, wherein the anode electrode and the phosphor are formed only in a portion corresponding to the color filters. Forming an anode electrode with a transparent conductor on one surface of the substrate having two surfaces; Forming a phosphor on a surface of the anode electrode; And Attaching a color filter plate to a second surface of the substrate, the color filter plate including a color filter formed in a space defined by the black matrix and the black matrix, the color filter having a red, green, and blue color when synthesized with the color of the phosphor; A method of manufacturing an anode substrate structure of a field emission display device. 6. The method of claim 5, wherein the phosphor is a white phosphor, and the color filter is a red, green, or blue color filter. The method of claim 6, wherein the white phosphor is Y2O2S: Tb material, Y2O2S: Tb, Sm material, ZnS: Ag + (Zn, Cd) S: Ag material, (Ca, Mg) SiO3: Ti + CaSiO3: Pb material, ZnS : Ag + ZnS: Cu, Al material, ZnS: Ag + (Zn, Cd) S: Cu, Al material, ZnSiO4: Mn ²⁺ (As) + (Zn, Mg) 3 (PO3) 2: Mn ²⁺ + ZnS A method for manufacturing an anode substrate structure of a field emission display device, characterized in that it is formed of one of a material selected from: Ag material and ZnS: Ag + ZnSiO4: Mn (As) + Y2O2S: Eu material. The method of claim 6, wherein the white phosphor is formed by one method selected from screen printer method, electrophoresis method, PVA slurry method, precipitation method, evaporation method, sputtering method and chemical vapor deposition method. Method for producing an anode substrate structure. 6. The field emission display device of claim 5, further comprising, after attaching the color filter plate, partially patterning the anode electrode and the phosphor so that only the portion corresponding to the color filters exists. Method for producing an anode substrate structure.