JPH11300257A - Coating device for applying coating liquid to uneven base material and manufacturing equipment of plasma display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating device for applying coating liquid to an uneven base material and manufacturing equipment of a plasma display, which enable high productivity and the high quality by uniformly ejecting a prescribed coating liquid from each ejection hole to surely coat each recessed part when the coating liquid is applied to the recessed parts of a base material having a regular uneven pattern like a plasma display. SOLUTION: This coating device for applying coating liquid to an uneven base material is provided with a table 6 to fix the uneven base material formed with recessed and projecting parts in a striped form at a fixed pitch in one direction on the surface, a nozzle 20 having a plurality of ejection holes installed to face the recessed and projecting parts of the base material, a supply means for supplying a coating liquid to the nozzle 20, a moving means for relatively three-dimensionally moving the table 6 and the nozzle 20, wherein an opening length (B), almost orthogonal to the stripe direction of the uneven base material, of the ejection hole 44 of the nozzle 20 and a recessed part pitch (S) of the base material are made to satisfy the relation of 10 μm<=B<=S<=500 μm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel in which a specific pattern of irregularities is formed on a substrate, in particular, a plasma display panel in which convex partitions having a predetermined shape are arranged at an equal pitch, and a stripe type black matrix type. The present invention relates to an apparatus for applying a coating liquid to an uneven substrate, which can be applied to the application of a predetermined pattern on the inner surface of a panel of a color picture tube, and an apparatus for manufacturing a plasma display using the apparatus.

[0002]

2. Description of the Related Art In recent years, displays have become increasingly diversified in their system. One of the things that are currently attracting attention is a plasma display that is larger, thinner and lighter than conventional cathode ray tubes. This causes a discharge in a discharge space formed between the front plate and the back plate, and this discharge generates ultraviolet light having a wavelength of 147 nm as a center from the xenon gas, and the ultraviolet light excites a fluorescent substance, thereby displaying an image. It becomes possible. Full-color display can be supported by causing a drive circuit to emit light from discharge cells in which phosphors emitting R (red), green (G), and blue (B) are separately applied.

[0003] In addition, recently developed A
A C-type plasma display is formed by laminating a front glass plate on which a display electrode / dielectric layer / protective layer is formed and a back glass plate on which an address electrode / dielectric layer / partition layer / phosphor layer are formed, and forming a stripe shape. It has a structure in which a mixed gas of He-Xe or Ne-Xe is sealed in a discharge space partitioned by partition walls.

[0004] The R, G, and B phosphor layers are filled in stripes in concaves and convexes formed by partition walls extending in one direction.

The structure in which the phosphors are formed in a stripe shape also has a striped black matrix type color picture tube panel.

In order to manufacture such a structure with high productivity and high quality, it is important to apply phosphors in a predetermined pattern.

Usually, after a partition pattern is formed,
As shown in JP-A-144375, a phosphor of one color is screen-printed on the entire surface, and only a necessary portion is left by photolithography so that a highly accurate pattern can be obtained. However, in this method, R, G, B
In order to form each phosphor pattern, it is necessary to repeat steps of coating, exposing, developing, drying, etc. of each color three times, which is costly and has a disadvantage that productivity is extremely poor.

As another method for simply forming a striped colored pattern on a glass substrate, there is a method described in JP-A-5-11105 or JP-A-5-142407 using a nozzle. Since three colors are simultaneously applied to a substrate having a flat surface by a nozzle having a flat tip, this technique cannot be used as it is for a substrate having unevenness on the surface.

Further, Japanese Patent Application Laid-Open No. 52-134368,
JP-A-54-13250, JP-A-54-1325
No. 1 Publication and the like discloses a control device for preventing meandering or the like as a method of applying a predetermined phosphor to a concave portion between convex black matrices on the inner surface of a panel of a striped black matrix type color picture tube. It has been shown to use an improved nozzle arrangement having However, since one nozzle is used, the method cannot be applied to a method of simultaneously applying a plurality of uneven portions on the surface, and there is a problem that it takes time for the application.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of coating a plurality of recesses of a base material having a predetermined uneven pattern such as a partition wall of a plasma display from a nozzle having a plurality of discharge holes with a predetermined coating. In applying the liquid, the coating liquid is uniformly discharged from each discharge hole to ensure that the liquid is applied to each concave part. By constantly realizing this uniform and stable coating, high productivity and high quality can be achieved. An object of the present invention is to provide an apparatus for applying a coating liquid to an uneven substrate and an apparatus for manufacturing a plasma display, which are made possible.

[0011]

In order to achieve the above object, an apparatus for applying a coating liquid to an uneven substrate according to the present invention is provided with an uneven surface in which uneven portions are formed at a constant pitch in a stripe shape in one direction on the surface. A table for fixing the base material, a nozzle having a plurality of discharge holes provided facing the uneven portion of the uneven base material, a supply means for supplying a coating liquid to the nozzle, and a three-dimensional table Wherein the opening length (B) of the discharge hole of the nozzle, which is substantially perpendicular to the stripe direction of the uneven substrate, is set to the following. Convex pitch of uneven substrate (S)
Satisfies the following conditions.

10 μm ≦ B ≦ S ≦ 500 μm In the above apparatus, the shape of the discharge hole of the nozzle is preferably circular.

It is preferable that the discharge hole of the nozzle is formed by penetrating a flat plate.

Further, it is preferable that the nozzle is provided with a discharge hole by arranging pipes of the same shape.

The number of discharge holes of the nozzle is 20 to 2
Preferably, the number is 000.

Further, the pitch of the discharge holes of the nozzle is
It is preferably 0.12 to 3 mm.

Further, the pitch of the discharge holes of the nozzle is
It is also preferable that the pitch is 3 m times (m is an integer of 1 to 10) of the pitch of the projections of the uneven substrate.

It is preferable that the surface of the discharge hole and / or the inner wall of the discharge hole of the nozzle is coated with a fluororesin film.

Further, it is preferable that the surface of the discharge hole and / or the inner wall of the discharge hole of the nozzle is coated with an amorphous carbon film.

Further, the apparatus for applying a coating liquid to an uneven substrate according to the present invention comprises: a table for fixing an uneven substrate having uneven portions formed on a surface thereof in one direction in a stripe at a constant pitch; A nozzle having a plurality of discharge holes facing the uneven portion of the material, a supply means for supplying a coating liquid to the nozzle, and a moving means for moving the table and the nozzle relative to each other three-dimensionally; The liquid coating apparatus is characterized in that a means for removing a coating liquid existing at a position other than a predetermined coating position on the uneven substrate is provided.

In the plasma display manufacturing apparatus according to the present invention, the coating liquid is a paste containing a phosphor powder that emits light of any one of red, green and blue colors. It is characterized by using a coating device.

Further, the apparatus for manufacturing a plasma display according to the present invention can handle three types of pastes containing phosphor powders that emit light in any of red, green and blue colors.
It is characterized in that three of the above-mentioned coating liquid application devices are arranged in series.

[0023]

Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing the entire configuration of a coating apparatus according to one embodiment of the present invention, FIG. 2 is a schematic view showing the table 6 and the nozzle 20 around FIG. 1, and FIGS. 6 to 10 show the structure of a coating liquid removing apparatus according to an embodiment of the present invention.

FIG. 1 shows an example of a coating apparatus applied to manufacture of a plasma display according to the present invention. This device has a base 2. A pair of guide groove rails 8 is provided on the base 2, and a table 6 is arranged on the guide groove rails 8. This table 6
A plurality of suction holes 7 are provided on the upper surface of the substrate so that the substrate 4 having the surface formed with stripes in one direction at a constant pitch can be fixed to the table surface by vacuum suction. The base material 4 is moved up and down on the table 6 by lift pins (not shown). Further, the table 6 is reciprocally movable in the X-axis direction on the guide groove rail 8 via the slide legs 9.

A feed screw 10 constituting a feed screw mechanism shown in FIG.
Nut-shaped connector 11 fixed to the lower surface of table 6
Extends through it. Both ends of the feed screw 10 are rotatably supported by bearings 12, and one end of the feed screw 10 is connected to an AC servomotor 16.

As shown in FIG. 1, above the table 6, a nozzle 20 for discharging a coating liquid is connected to a lifting mechanism 30 and a width direction moving mechanism 36 via a holder 22. The elevating mechanism 30 includes an elevating bracket 28 that can be moved up and down, and is attached to a pair of guide rods inside the casing of the elevating mechanism 30 so as to be able to move up and down. In this casing, a feed screw (not shown) formed of a ball screw is also rotatably disposed between the guide rods, and is connected to the lifting bracket 28 via a nut-type connector. . Further, an AC servomotor (not shown) is connected to the upper end of the feed screw, and the lifting bracket 28 can be arbitrarily moved up and down by rotation of the AC servomotor.

Further, the lifting mechanism 30 is moved by the Y-axis moving bracket 32 (actuator) in the width direction moving mechanism 36.
It is connected to the. The width-direction moving mechanism 36 moves the Y-axis moving bracket 32 so as to be reciprocally movable in the width direction of the nozzle, that is, in the Y-axis direction. The guide rod, feed screw, nut-type connector, AC servomotor, etc. necessary for the operation are provided with a lifting mechanism 3 inside the casing.
It is arranged in the same way as 0. The width direction moving mechanism 36 is fixed on the base 2 by the columns 34.

With these configurations, the nozzle 20 can be freely moved in the Z-axis and Y-axis directions.

The nozzle 20 extends horizontally in the direction orthogonal to the reciprocating direction of the table 6, that is, in the Y-axis direction.
The U-shaped holder 22 for directly holding the holder is rotatably supported in the elevating bracket 28, and can freely rotate in the vertical direction in the direction of the arrow in the drawing.

Above the holder 22, a horizontal bar 24 is also fixed to a lifting bracket 28. This horizontal bar 2
4 are electromagnetically actuated linear actuators 2 at both ends.
6 is attached. This linear actuator 2
6 has telescopic rods 29 protruding from the lower surface of the horizontal bar 24, and these telescopic rods 29 can regulate the rotation angle of the holder 22 by coming into contact with both ends of the holder 22. Can be set arbitrarily.

Further, referring to FIG. 1, an inverted L-shaped sensor support 38 is fixed to the upper surface of the base 2, and the tip of the sensor support 38 is positioned at the top (height) of the projection of the base material 4 on the table 6. )
Is mounted. Next to the height sensor 40, a camera 72 for detecting the position of the uneven portion of the base member 4 is attached to the column 70.
As shown in FIG. 2, the camera 72 is electrically connected to the image processing device 74, and can quantitatively determine a change in the position of the uneven portion.

Further, a sensor 66 for detecting the vertical position of the lower end surface (discharge hole surface) of the nozzle 20 with the discharge hole with respect to the table 6 is attached to one end of the table 6 via a sensor bracket 64. I have.

As shown in FIG. 2, the nozzle 20 has a manifold 41 in which a coating liquid 42 is filled.
4 are linearly arranged in the longitudinal direction on the nozzle tip surface 45 (see FIGS. 3 and 4). Then, the coating liquid 42 is discharged from the discharge holes 44. The nozzle 20 has a supply hose 46.
Are connected to the discharge electromagnetic switching valve 48, the supply unit 50, the suction hose 52, the suction electromagnetic switching valve 54, and the coating liquid tank 56. Coating liquid tank 5
6 stores a coating liquid 42. The coating liquid 42 is red,
It is made of a paste containing a phosphor powder that emits green or blue light.

Specific examples of the supply unit 50 include a piston, a constant volume pump such as a diaphragm type, a tubing pump, a gear pump, a mono pump, and a pressure feed controller for pushing out a liquid by gas pressure. In response to a control signal from the supply device controller 58, the supply unit 50 and each of the electromagnetic switching valves are operated to suck the coating liquid 42 from the coating liquid tank 56 and supply the coating liquid 42 to the nozzle 20. be able to. In order to stabilize the suction operation of the coating liquid 42 from the coating liquid tank 56 to the constant-volume pump, the coating liquid tank 56 is made to be a closed container, and pressure is applied with air or a gas such as nitrogen which is an inert gas. Is also good. air,
To always apply a constant pressure with nitrogen, etc., the coating liquid tank 5
6 may be connected to a supply device such as air or nitrogen to control the pressure. The magnitude of the pressure is 0.01 to 1 MPa, especially 0.0
2 to 0.5 MPa is preferable.

The supply device controller 58 is further electrically connected to the general controller 60. The general controller 60 includes a motor controller 62, an electric input of the height sensor 40, and the like.
All the control information such as the information from No. 4 is electrically connected, and controls the entire sequence control. The general controller 60 may be a computer, a sequencer, or any controller having a control function.

The motor controller 62 includes the AC servomotor 16 for driving the table 6 and the lifting mechanism 30.
And each actuator 7 of the width direction moving mechanism 36
6, 78 (for example, an AC servomotor), a signal from a position sensor 68 for detecting the moving position of the table 6, and a linear sensor (not shown) for each of the Y and Z axes for detecting the operating position of the nozzle 20. Is input. Instead of using the position sensor 68, an encoder may be incorporated in the AC servomotor 16 and the position of the table 6 may be detected based on a pulse signal output from the encoder.

In this embodiment, the application example in which the substrate 4 moves in the X-axis direction and the nozzle 20 moves in the Y-axis and Z-axis directions has been described. The table and the nozzle may be of any type as long as the structure and the type can be relatively three-dimensionally moved.

In the above-described embodiment, the application is performed by moving the table and moving the unevenness in the pitch direction by moving the nozzle. However, the application is performed by moving the nozzle and moving the unevenness in the pitch direction. May be performed by moving the table.

Further, as the substrate in the present invention, other than a glass plate, an iron plate, an aluminum plate or the like may be used as long as it is a single-leaf type. Further, the case where one type of coating liquid is applied has been described in detail, but the present invention can be applied to a case where phosphors of three colors such as red, blue, and green are applied simultaneously.

In the apparatus for applying a coating liquid as described above, in the present invention, for example, a nozzle 80 of the type shown in FIGS. 3 and 4 is used. In the nozzle 80 of the type shown in FIGS. 3 and 4, a manifold portion 81 for accumulating a predetermined amount of the coating liquid inside the block is hollowed out, and a discharge hole 83 which is a through hole is formed in the flat plate 82 at the tip. Some of them are processed and then joined to the manifold portion 81, and any of these methods may be adopted. 84 is the nozzle 8
The drawing shows the inlet of the coating liquid into 0.

Further, as shown in FIG. 5, the discharge holes of the nozzles may be constituted by arranging pipes 85 of the same shape. This case is preferable because the nozzle is less likely to become dirty.

The discharge holes 83 of the nozzles are shown in FIGS.
As shown in FIG. 2, the opening length (B) of the concave-convex substrate 100 substantially perpendicular to the stripe direction is 10 μm or more and 500 μm or less, and the interval (pitch) between the adjacent convex portions 101.
(S) It is set as follows.

The shape of the discharge hole at this time is circular,
Examples include an ellipse, an ellipse, a twin circle, and a polygon such as a triangle and a rectangle. If the opening length is smaller than 10 μm, the coating liquid is clogged immediately and cannot be used, and the
When it is larger than m, the coating liquid spills from the discharge holes when the discharge of the coating liquid is stopped. By setting the opening length to be equal to or less than the interval between the adjacent protrusions, it is possible to suppress the coating liquid from adhering to the protrusion tops of the uneven substrate.

The number of discharge holes of the nozzle is set to 20 to 2000. If the number of ejection holes is small, it takes too much time for coating. When the number of holes exceeds 2,000, it becomes difficult to secure processing accuracy of the discharge holes, and it becomes difficult to perform accurate coating.

The pitch of the discharge holes of the nozzle is 0.12 to 3
mm. Discharge hole pitch is 0.12mm
If it is less than 1, the nozzle is difficult to manufacture because the interval between adjacent discharge holes is small. If the pitch of the discharge holes exceeds 3 mm,
In the case of applying to an uneven base material having an uneven portion at a pitch of 300 μm or less, application control becomes difficult.

Further, the pitch of the discharge holes of the nozzle may be 3 m times (m is an integer of 1 to 10) the pitch of the convex portions. In this case, the coating can be performed efficiently.

The surface of the discharge hole and / or the inner wall of the discharge hole is coated with a fluorine resin film (for example, “Teflon” manufactured by DuPont, USA) on the surface of the discharge hole and / or the inner wall of the discharge hole. The releasability of the liquid is improved, and the contamination of the ejection hole surface can be suppressed.

Further, by coating an amorphous carbon film (for example, diamond-like carbon) on the discharge hole surface and / or the inner wall of the discharge hole of the nozzle, the surface hardness of the discharge hole surface and the inner wall of the discharge hole is improved. And wear resistance is improved.

Examples of the material of the nozzle include metals such as stainless steel and nickel, and non-metals such as ceramics.

As a method of forming the discharge hole of the nozzle, there is a method of precision fine processing such as drilling, electric discharge machining, photo etching, electroforming.

Further, in a device for applying a coating liquid to an uneven substrate, when the coating liquid adheres to the top of the convex portion of the uneven substrate, for example,
It is preferable to provide a means for removing a coating liquid existing at a position other than a predetermined coating position on the substrate.

In the manufacture of a plasma display, if a phosphor adheres to the top of the partition, discharge leakage occurs due to insufficient partitioning of cells by the partition when the front plate is sealed. It is preferable that the phosphor adhered to the top is removed by attaching it to the adhesive.

6 to 10 schematically show an apparatus for removing the coating liquid. FIG. 6 is a view of scraping by a spatula 88. FIG. 7 shows a belt 89 made of an adhesive.
Is removed by contacting the top of the convex portion of the substrate 4 while rotating between the two rotating rolls 90. FIG.
The belt 89 made of an adhesive is removed by contacting the top of the convex portion while rotating between the feed roll 91 and the take-up roll 82. FIG. 9 shows a configuration in which a roller 93 made of an adhesive is brought into contact with the top of the convex portion of the base material 4 and removed. FIG. 10 shows a case where compressed air is blown by the air nozzle 94 and the air removed by the suction device 95 is sucked.

The material of the pressure-sensitive adhesive is not particularly limited as long as it has the above-mentioned properties, and examples thereof include polyurethane rubber, polyethylene rubber, silicon rubber and gel bodies thereof.

The uneven base material has red, green, and blue colors.
When applying a color phosphor, the coating device for the coating liquid described above is used.
It is preferable that three phosphors are arranged in series corresponding to red, green and blue, and phosphor layers of three colors are sequentially applied. Accordingly, it is not necessary to clean the nozzle, the coating liquid tank, the pipe, and the like every time one color is applied, and the phosphor layers of three colors can be efficiently formed on the uneven substrate.

[0057]

As described in detail above, according to the apparatus for applying a coating liquid to the uneven substrate of the present invention, the coating liquid can be applied to the concave portions with high accuracy and stability. Thereby, the quality of the object to be coated is improved, and the productivity is improved.

In addition, since means for removing the coating liquid existing at a position other than the predetermined coating position of the uneven substrate is provided, the quality is improved and the yield is increased, so that the productivity is improved.

According to the apparatus for manufacturing a plasma display of the present invention, since the apparatus for applying a coating liquid to the uneven substrate is used, a high-quality plasma display can be manufactured with high productivity and at low cost. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a coating liquid application apparatus according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing a configuration around a table and a nozzle of the apparatus shown in FIG. 1;

FIG. 3 is a longitudinal sectional view of a nozzle according to an embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of the nozzle of FIG. 3 in a direction perpendicular to FIG. 3;

FIG. 5 is a longitudinal sectional view of a nozzle according to another embodiment of the present invention.

FIG. 6 is a partial schematic configuration diagram of a coating liquid removing apparatus according to an embodiment of the present invention.

FIG. 7 is a partial schematic configuration diagram of a coating liquid removing apparatus according to another embodiment of the present invention.

FIG. 8 is a partial schematic configuration diagram of a coating liquid removing apparatus according to another embodiment of the present invention.

FIG. 9 is a partial schematic configuration diagram of a coating liquid removing apparatus according to another embodiment of the present invention.

FIG. 10 is a partial schematic configuration diagram of a coating liquid removing apparatus according to still another embodiment of the present invention.

FIG. 11 is a longitudinal sectional view of a main part of a nozzle and an uneven substrate according to an embodiment of the present invention.

FIG. 12 is a schematic view of the uneven base material and the nozzle holes of FIG. 11 as viewed from above.

[Description of Signs] 2: Base 4: Base material 6: Table 7: Suction hole 8: Guide groove rail 9: Slide leg 10: Feed screw 11: Connector 12: Bearing 16: AC servo motor 20: Nozzle 22: Holder 24: horizontal bar 26: linear actuator 28: elevating bracket 29: telescopic rod 30: elevating mechanism 32: Y-axis moving bracket 34: support 36: axial movement mechanism 38: sensor support 40: height sensor 41: manifold 42: coating Liquid 44: Discharge hole 46: Supply hose 48: Discharge electromagnetic switching valve 50: Supply unit 52: Suction hose 54: Suction electromagnetic switching valve 56: Coating liquid tank 58: Supply device controller 60: Overall controller 62: Motor controller 64 ： Sensor bracket 66 ： Position sensor 68 ： Position sensor 70 Camera column 72: Camera 74: Image processing device 76: Actuator for lifting mechanism 78: Actuator for width direction moving mechanism 80: Nozzle 81: Manifold part 82: Flat plate 83: Discharge hole 84: Coating liquid inlet 85: Pipe 88: Spatula 89: Belt 90: Rotating roll 91: Sending roll 92: Winding roll 93: Roller 94: Air nozzle 95: Suction device 100: Uneven substrate 101: Convex portion

Claims (12)

[Claims] 1. A table for fixing an uneven base material having uneven portions formed on a surface thereof in one direction in a stripe pattern at a constant pitch, and a plurality of discharge holes provided facing the uneven portions of the uneven base material. A coating liquid applying apparatus for applying a coating liquid to an uneven substrate, comprising: a nozzle having a nozzle; a supply unit for supplying the coating liquid to the nozzle; and a moving unit configured to relatively move the table and the nozzle three-dimensionally. An irregular length base material characterized in that an opening length (B) of a discharge hole substantially orthogonal to a stripe direction of the uneven substrate satisfies the following condition with respect to a convex pitch (S) of the uneven substrate. Applicator for coating liquid. 10 μm ≦ B ≦ S ≦ 500 μm 2. The apparatus according to claim 1, wherein the shape of the discharge hole of the nozzle is circular. 3. The discharge hole of the nozzle is formed by penetrating a flat plate.
A coating device for applying a coating liquid to the uneven substrate according to the above. 4. The nozzle according to claim 1, wherein the discharge holes of the nozzle are formed by arranging pipes of the same shape.
A coating device for applying a coating liquid to the uneven substrate according to the above. 5. The method according to claim 1, wherein the number of discharge holes of said nozzle is 20 to 2000.
The coating device for applying a coating liquid to the uneven substrate according to any one of claims 1 to 4, wherein the coating liquid is a unit. 6. A method according to claim 1, wherein the pitch of the discharge holes of the nozzle is 0.12.
The apparatus for applying a coating liquid to an uneven substrate according to any one of claims 1 to 5, wherein the coating liquid has a thickness of 3 to 3 mm. 7. The method according to claim 1, wherein the pitch of the discharge holes of the nozzle is 3 m times (m is an integer of 1 to 10) the pitch of the projections of the uneven substrate. An apparatus for applying a coating liquid to the uneven substrate according to the above. 8. The method according to claim 1, wherein the surface of the discharge hole and / or the inner wall of the discharge hole of the nozzle is coated with a fluorine-based resin film. Liquid coating device. 9. The uneven substrate according to claim 1, wherein an amorphous carbon film is coated on a surface of the discharge hole and / or an inner wall of the discharge hole of the nozzle. Coating liquid coating device. 10. A table for fixing an uneven base material having uneven portions formed in a stripe at a constant pitch in one direction on a surface thereof, and a plurality of discharge holes provided to face the uneven portions of the uneven base material. A coating liquid applying apparatus for coating the uneven base material, comprising: a nozzle having a nozzle; a supply unit configured to supply the coating liquid to the nozzle; and a moving unit configured to relatively move the table and the nozzle three-dimensionally. An apparatus for applying a coating liquid to an uneven base material, comprising means for removing a coating liquid existing at a position other than a predetermined application position of a material. 11. A coating solution containing a phosphor powder emitting light of any one of red, green and blue colors, wherein the coating solution coating apparatus according to any one of claims 1 to 10 is used. An apparatus for manufacturing a plasma display, comprising: 12. An apparatus for applying a coating liquid according to claim 1, which corresponds to three kinds of pastes containing phosphor powders emitting light of any one of red, green and blue colors. An apparatus for manufacturing a plasma display, wherein the apparatuses are arranged in series.