JPH1140065A - Manufacture of plasma display panel, and phosphor-layer forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of plasma display panels and a phosphor-layer forming device which are capable of forming phosphor layers with accuracy in channels defined between partitions even in a micro cell structure, forming them uniformly in stripe channels without scanning with nozzles at high speed, and forming them relatively with ease even on the sides of the channels. SOLUTION: A header 23 is positioned to one-side end of a back glass substrate 15 so that its nozzles 24 are brought nearer to the inside of channels 170 in the substrate 15. These nozzles 24 then discharge small amounts of phosphor ink for bridge formation thereof. The header 23 thereafter scans the substrate 15 while discharging phosphor ink from the nozzles 24 continuously to fill the channels 170 with the ink. This scanning keeps a shorter distance between the nozzles 24 and the channel bottoms 170a to maintain the bridge formation of phosphor ink between the inside of the channels 170 in the substrate 15 and the nozzles 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method of manufacturing a plasma display panel used for a display device and the like, and a phosphor layer forming apparatus.

[0002]

2. Description of the Related Art In recent years, expectations for high-definition and large-screen televisions such as high-definition televisions have been increasing.
In the field of displays such as CRTs, liquid crystal displays (LCDs), and plasma display panels (PDPs), the development of displays suitable for them is underway.

Conventionally, CRTs, which have been widely used as television displays, are excellent in resolution and image quality, but have a large screen of 40 inches or more in that the depth and weight increase with the screen size. Is not suitable. In addition, LCDs have excellent performance such as low power consumption and low driving voltage, but have technical difficulties in producing a large screen and have a limited viewing angle.

On the other hand, the PDP can realize a large screen with a small depth, and a 40-inch class product has already been developed. By the way, as the demand for higher-quality displays increases, PDPs having a finer cell structure are also desired. For example, in the conventional NTSC, the number of cells is 640 × 480 and 4
In the 0-inch class, the cell pitch is 0.43 mm x 1.2
9 mm, the cell area was about 0.55 mm ² , but at the pixel level of a full-spec high-definition television, the number of pixels was 1920 × 1125, and the cell pitch in the 42-inch class was 0.15 mm × 0.48 mm, The area of the cell is as fine as 0.072 mm ² .

In general, a PDP has a partition formed on a back plate having electrodes disposed on its surface, and a red, red,
It is manufactured by arranging green and blue phosphor layers, superposing a front cover plate on which electrodes are arranged, and sealing a discharge gas.
The DC type has an electrode exposed to the discharge space, whereas the AC type has a dielectric glass layer disposed on the electrode. In general, the partition walls are formed in a stripe shape in the AC type, whereas the partition walls are formed in a grid shape in the DC type,
In this respect, the AC type is more suitable for forming a panel having a fine cell structure.

The principle of light emission of a PDP is basically the same as that of a fluorescent lamp. Ultraviolet rays are emitted from a discharge gas upon discharge, and phosphor particles (red, green, blue) of a phosphor layer emit the ultraviolet rays. Upon receiving and exciting light, the efficiency of converting discharge energy to ultraviolet light and the efficiency of converting phosphor into visible light are low, and it is difficult to obtain high luminance. Therefore, in order to put a PDP having a detailed cell structure into practical use, studies have been made to increase the luminous efficiency of the cell, and improvement of the phosphor layer has been studied.

[0007]

In order to form a phosphor layer having high luminous efficiency, the quality of the phosphor used is important, but the phosphor layer is formed not only on the bottom surface of the recess between the partition walls but also on the side surface. It is also important to arrange in good balance. As a method of forming the phosphor layer, a method of filling a phosphor paste in the recess between the partition walls by a screen printing method and firing the phosphor paste is often used. However, for a PDP having a fine cell structure, screen printing is used. The law is difficult to apply.

That is, the cell pitch is 0.1 to 0.15 mm
In the case of about, the gap between the partition walls is 0.08 to 0.1 m
m, but the phosphor ink used in screen printing has a high viscosity (usually tens of thousands of centipoise), so it is not possible to accurately and quickly pour the phosphor ink into a narrow gap of 0.1 mm or less. Have difficulty. It is also difficult to produce a screen plate having a fine structure.

In order to form a phosphor layer having a preferable shape by a screen printing method, an appropriate amount of the phosphor paste is attached to the side surface of the concave portion by adjusting printing conditions such as the viscosity of the phosphor paste. Although it is necessary, in practice, there is a problem that the phosphor paste hardly adheres to the side surface and its adjustment is difficult. On the other hand, for example, Japanese Patent Application Laid-Open No. 6-5205 discloses that the recesses are filled with phosphor ink by a screen printing method, dried, sandblasted, and baked, so that the side surfaces of the recesses are also provided. Although a method of forming a phosphor layer is disclosed, the cost is increased because sandblasting is performed, and there is still difficulty in applying to a fine cell structure because screen printing is basically used.

On the other hand, as a method of forming a phosphor layer of a PDP, a photoresist film method and an ink jet method are known in addition to the screen printing method. As disclosed in JP-A-6-273925, a photoresist film method embeds a film of an ultraviolet-sensitive resin containing a phosphor of each color in a groove between partition walls to form a phosphor layer of a corresponding color. This is a method in which only the portion to be exposed is exposed and developed, and the portion that is not exposed is washed away. According to this method, even when the cell pitch is small, it is possible to bury the film in the concave portion with a certain degree of accuracy. However, since it is necessary to sequentially perform film embedding, exposure development, and rinsing for each of the three colors, there is a problem that the manufacturing process is complicated and color mixing is likely to occur, and furthermore, the phosphor is relatively expensive. Nevertheless, there is also a problem that it is difficult to recover the washed-out phosphor, which increases the cost.

On the other hand, the ink jet method is, as disclosed in Japanese Patent Application Laid-Open No. H8-162019, by scanning while pressurizing an ink liquid composed of a fluorescent substance and an organic binder and jetting it from a nozzle. This is a method of depositing an ink liquid on an insulating substrate in a desired pattern, and it is possible to accurately apply ink to concave portions between narrow partition walls.

However, since the ejected ink tends to become droplets, it is difficult to apply a constant thickness to the grooves between the partition walls when the partition walls are formed in a stripe shape. Here, it is considered that if the ink having a relatively low viscosity is jetted at a high pressure, the ink can be stably jetted in a continuous flow. However, in this case, since the ink jetting amount per unit time becomes large, a high speed ( It is necessary to scan the nozzle at about 3 m / sec), but a mechanism for performing high-speed scanning with high accuracy is expensive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and enables a phosphor layer to be accurately formed in a groove between partition walls even in the case of a fine cell structure, and a high-speed nozzle. A method of manufacturing a PDP, which can form a uniform phosphor layer in a stripe-shaped groove without scanning, etc., and can further easily form a phosphor layer on a side surface of the groove. It is an object of the present invention to provide a phosphor layer forming device.

[0014]

In order to achieve the above object, in the method of manufacturing a PDP and the phosphor layer forming apparatus of the present invention, a nozzle having a phosphor having a partition wall formed on a surface thereof is provided with a phosphor from a nozzle. In the process of forming the phosphor layer by filling the groove between the partition walls while discharging ink, the inner surface of the groove of the plate and the nozzle are cross-linked with the phosphor ink, and the phosphor ink is discharged from the nozzle to cross-link. While maintaining the above, the nozzle was scanned along the partition wall. Here, the bridge between the inner surface of the groove of the plate and the nozzle means that the nozzle is crosslinked by the surface tension (meniscus force) of the phosphor ink.

According to this method and apparatus, a continuous flow can be formed even when the phosphor ink is slowly discharged from the nozzle at a low pressure during the scanning of the nozzle. Therefore, a uniform phosphor layer can be formed even when the nozzle is slowly scanned. Further, a continuous flow can be formed even by using a relatively high-viscosity phosphor ink.

It is also possible to crosslink the phosphor ink between the nozzle and the side surface of the groove, thereby making it relatively easy to attach the phosphor ink to the side surface of the groove. When scanning the nozzle, the distance between the bottom of the groove of the plate and the nozzle is 5 μm while the nozzle and the plate are not in contact with each other.
It is preferable to carry out while maintaining the thickness to 1 mm. If the distance between the bottom of the groove of the plate and the nozzle is kept to be equal to or less than the height of the partition wall when the nozzle is scanned, it is more effective to attach the phosphor ink to the side surface of the groove.

When crosslinking the phosphor ink,
If the distance between the plate and the nozzle is made smaller than when the nozzle is scanned, crosslinking can be performed easily and quickly. Further, at the time of crosslinking, first, the phosphor ink is attached to the end of the groove of the plate, and the nozzle is brought into contact with the phosphor ink, whereby the crosslinking can be easily performed. The viscosity of the phosphor ink discharged from the nozzle is desirably set to 10 to 1000 centipoise at a shear rate of 200 sec ^-1 , and generally, the nozzle diameter is 45 to
Desirably, it is 150 μm.

In the step of forming such a phosphor layer, at the time of scanning, scanning is performed while ejecting phosphor ink from a plurality of nozzles to a plurality of grooves in parallel, or a plurality of nozzles are ejected from a plurality of nozzles. Scanning can be performed while discharging phosphor inks of a plurality of colors in parallel to the grooves. In this case, a plurality of phosphor layers or phosphor layers of a plurality of colors can be formed in one scan, which is efficient.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 (Overall Configuration and Manufacturing Method of PDP) FIG. 1 is a schematic sectional view of an AC surface discharge type PDP according to an embodiment of the present invention. Although only one cell is shown in FIG. 1, red, green,
A PDP in which a large number of cells that emit blue light are alternately arranged
Is configured.

This PDP has a front panel in which a discharge electrode 12 and a dielectric glass layer 13 are disposed on a front glass substrate 11, an address electrode 16 and a partition wall 1 on a rear glass substrate 15.
7. A back panel on which the phosphor layer 18 is arranged is bonded to each other, and a discharge gas is sealed in a discharge space 19 formed between the front panel and the back panel. Is done.

In FIG. 1, the discharge electrode 12 is shown in a cross section for convenience. However, in practice, the discharge electrode 12 is formed so as to form an orthogonal matrix with the address electrode 16 in FIG.
Are arranged in a direction along the plane of the drawing. Production of front panel: The front panel is composed of a discharge electrode 1 on a front glass substrate 11.
2 is formed, and is covered with a lead-based dielectric glass layer 13, and a protective layer 14 is formed on the surface of the dielectric glass layer 13.

The discharge electrode 12 is a silver electrode, and its width is, for example, 60 μm. The discharge electrode 12 can be formed by screen-printing and baking a paste for a silver electrode. The dielectric glass layer 13 is, for example,
70% by weight of lead oxide [PbO], 15% by weight of boron oxide [B ₂ O ₃ ], 10% by weight of silicon oxide [SiO ₂ ] and 5%
Wt% aluminum oxide and organic binder [α-terpineol dissolved 10% ethylcellulose]
Is applied by a screen printing method, and then baked at 520 ° C. for 20 minutes to form a film having a thickness of 3
Formed at 0 μm.

The protective layer 14 is made of magnesium oxide (Mg)
O) and is formed to a thickness of 0.5 μm by, for example, a sputtering method. Manufacture of rear panel: Address electrode 16 is formed on rear glass substrate 15 by screen-printing a paste for silver electrodes and then firing.

Next, the glass material is repeatedly screen-printed and then fired to form the partition wall 17.
The partition 17 is spaced (cell pitch) in accordance with, for example, a 42-inch high-vision television display.
Is set to 0.15 mm and the height is set to 0.15 mm. Then, the phosphor layer 18 is formed in the groove between the partition walls 17. The method of forming the phosphor layer 18 will be described later in detail,
The phosphor ink is filled by a method of scanning while continuously ejecting the phosphor ink from the nozzles, and the phosphor ink is baked to form a phosphor layer.

Production of PDP by Panel Lamination: Next, the front panel and the rear panel produced in this way are laminated using sealing glass, and the inside of the discharge space 19 partitioned by the partition 17 is subjected to high vacuum (for example, 8 × 10 ^-7 To
rr), then discharge gas (for example, He-Xe system,
Ne-Xe-based inert gas) at a predetermined pressure (100 to 7).
A PDP is prepared by enclosing at 60 Torr).

(Regarding Method of Forming Phosphor Layer) FIG.
Ink filling device 20 used when forming phosphor layer 18
FIG. FIG. 3 is a perspective view showing a filling operation of the apparatus. As shown in FIG. 2, in the ink filling device 20, a phosphor ink is stored in a server 21, and a pressure pump 22 pressurizes the phosphor ink and supplies the phosphor ink to a header 23.

The header 23 is provided with an ink chamber 231 and a plurality of protruding nozzles 24, and the phosphor ink supplied under pressure is distributed from the ink chamber 231 to each nozzle 24 and continuously. It is designed to be ejected. The header 23 is formed integrally with the ink chamber 231 and the nozzle 24 by machining or electric discharge machining of a metal material.

The phosphor ink stored in the server 21 is prepared such that phosphor particles of each color, a binder, a solvent component and the like have an appropriate viscosity, and the server ink is set so that the phosphor particles do not settle. It is stored while being mixed and stirred by a stirrer (not shown) installed in the inside 21. Phosphor particles constituting the phosphor ink are generally PD
The material used for the P phosphor layer can be used. Specific examples thereof include a blue phosphor: BaMgAl ₁₀ O ₁₇ : Eu ^{2+ a} green phosphor: Zn ₂ SiO ₄ : Mn ^{2+ a} red phosphor: (Y _x Gd _{1 -x} ) BO ₃ : Eu ³⁺ Can be mentioned.

The average particle size of the phosphor particles is desirably 0.5 μm or more in order to obtain good luminous efficiency, and is 5 μm or less in order to suppress clogging of the nozzle 24 and precipitation of the phosphor particles. Is preferred. That is, it is preferable to use phosphor particles having an average particle size of 0.5 to 5 μm (usually, 2 to 3 μm). The viscosity of the phosphor ink is 10 to 1000 at a shear rate of 200 sec ^-1 .
Adjust to within the range of centipoise, and add 0 to
It is desirable to add 1% by weight.

As a specific example of the composition of the phosphor ink, as shown in Table 1 below, 30% by weight of each color phosphor particles having an average particle size of 2.0 μm of No. 1 and ethyl cellulose (molecular weight of 200,000) as a binder Various compositions including 1.0% by weight, 0.5% by weight of glyceryl triolate as a dispersant, and 68.5% by weight of terpineol as a solvent can be given.

[0031]

[Table 1]

The diameter of the nozzle 24 is determined by the gap W between the partition walls 17.
Smaller than 150 μm, and usually 45 μm to prevent nozzle clogging.
It is desirable to set it to m or more. Therefore, the nozzle 24
Is desirably set in the range of 45 to 150 μm. As shown in FIG. 3, in the ink filling device 20, the header 23 can be scanned along the partition 17 on the rear glass substrate 15 on which the partition 17 is provided (the arrow A in FIG. 3 indicates the scanning). direction). The scanning of the header 23
In this embodiment, the header 23 is moved by a header scanning mechanism (not shown) that drives the header 23 linearly. Alternatively, the header 23 may be fixed and the rear glass substrate 15 may be driven linearly.

Also, such an ink filling device 20 is
The pitch of the nozzles 24 provided for each color of red, blue, and green and opened in the header 23 of each color is 3 times the cell pitch.
As shown in FIG. 2, the header 2
With the scanning of No. 3, every third groove is filled with the phosphor ink. Such an ink filling device 20
Is used to fill the phosphor ink as shown below.

First, the header 23 is positioned at the end 15a of the rear glass substrate 15 (the end 15a is at or near the end of the groove 170), and the nozzle 24 and the groove 170 of the rear glass substrate 15 are placed. By causing the nozzle 24 to discharge a small amount of the phosphor ink by bringing the inner surface of the phosphor into close enough contact with or in contact with the inner surface of the phosphor ink, a cross-linking of the phosphor ink is formed.

Here, a mode in which a bridge is formed between the nozzle 24 and the inner surface of the groove 170 due to the surface tension of the phosphor ink will be considered. FIG. 4 shows a state in which a sphere of phosphor ink is hanging on the nozzle 24. L in the figure represents the distance from the lower end of the nozzle 24 to the lower end of the sphere of phosphor ink, and M in the figure represents the width of the sphere of phosphor ink.

When the nozzle 24 provided with the sphere of phosphor ink approaches the groove 170 as described above, the phosphor ink adheres to the inner surface of the groove 170 and is cross-linked, but the width M is larger than the width of the groove 170. If the width is larger, it is considered to be attached to the side surface 170b and crosslinked. If the width M is smaller than the width of the groove 170, the phosphor ink sphere is attached to the bottom surface 170a and crosslinked by surface tension (meniscus force).

In a normal phosphor ink, the distance between the crosslinkable nozzle 24 and the bottom surface 170a is considered to be 1 mm or less. At the time of this crosslinking, the nozzle 24 and the bottom surface 170
If it is carried out in a state where it is in contact with a, crosslinking can be easily and quickly formed. Subsequently, the phosphor ink is filled into the groove 170 of the rear glass substrate 15 by operating the pressure pump 22 and continuously discharging the phosphor ink from the nozzles 24 while scanning the header 23. At this time, the distance between the nozzle 24 and the bottom surface 170a is kept small, and the inner surface of the groove 170 of the rear glass substrate 15 and the nozzle 2
Scanning is performed while maintaining the cross-linking due to the surface tension of the phosphor ink formed during the period 4.

In this scanning, the nozzle 24 and the bottom surface 170a are scanned while approaching the nozzle 24 and the bottom surface 170a in the same manner as in the above-described crosslinking (usually 1 mm or less). During scanning, it is desirable that the nozzle 24 and the rear glass substrate 15 do not come into contact with each other. However, since the surface of the groove 170 of the rear glass substrate 15 has some irregularities, It is desirable that the distance from the bottom surface 170a is 5 μm or more.

Therefore, at the time of scanning, the nozzle 24 and the groove 1
It is desirable that the distance between the bottom 70 and the bottom surface 170a be in the range of 5 μm to 1 mm. Pressurizing pump 22 during scanning
Is adjusted based on the amount of application to the groove 170 and the scanning speed of the nozzle 24 so as to obtain an appropriate discharge amount.
In the present embodiment, about several tens mm / s (for example, 50 mm
The scanning is performed at a slow speed (/ s) and the pressure of the pressure pump 22 is set small (about 0.5 kgf / cm ² ) to make the ejection amount smaller than in the conventional ink jet system.

In this case, although the discharge amount of the phosphor ink is small, a continuous flow is formed by the cross-linking of the phosphor ink as described above. A phosphor layer can be formed. Further, in the case of the conventional ink jet method, it is difficult to form a continuous flow by using a phosphor ink having a high viscosity or a phosphor ink having a large surface tension, but the method of forming a phosphor layer according to the present embodiment is difficult. For example, a continuous flow can be formed even when a phosphor ink having a relatively high viscosity or a phosphor ink having a large surface tension is used.

In this embodiment, by adjusting the diameter of the nozzle 24, the viscosity of the phosphor ink, and the like, the nozzle 24 and the side surface 170b are bridged as shown in FIG. 5 during scanning. You can also.
That is, if the diameter of the nozzle 24 is increased and the viscosity of the phosphor ink is increased, it is considered that such a bridge is easily formed.

As described above, the nozzle 24 and the side surface 1 are scanned during scanning.
70b, the side surface 170 of the phosphor ink
The coating on b is performed favorably. According to the procedure as described above, the red, green, and blue phosphor inks are applied to the predetermined groove 170.
After filling and drying, the panel is baked (1 hour at about 500 ° C).
(0 minute) to form red, green, and blue phosphor layers 18 over the entire panel.

[Second Embodiment] FIG. 6 is a cross-sectional view schematically showing how a phosphor ink is filled in the present embodiment. This embodiment is basically based on Embodiment 1, but performs scanning with the nozzle 24 inserted in the groove 170 during scanning as shown in FIG.

That is, at the time of scanning, the distance between the bottom surface 170a of the groove 170 and the nozzle 24 is set to a distance (for example, 20 μm) smaller than the height (for example, 120 μm) of the partition 17.
m). According to this coating method, since the nozzle 24 inserted in the groove 170 functions to push the phosphor ink from the center of the groove 170 toward the side surface 170b, the phosphor ink adheres to the upper portion of the side surface 170b. It is possible to do.

The outer diameter of the nozzle 24 is set smaller than the width of the groove 170 so that the nozzle 24 can be inserted into the groove 170. A preferable value of the insertion depth of the nozzle 24 into the groove 170 is determined by the physical properties of the phosphor ink. It depends on the amount and the filling amount, and also the wettability between the phosphor ink and the side surface 170b. Therefore, it is important to adjust the phosphor ink to be attached to the inner surface of the groove 170 in accordance with these factors.

[Embodiment 3] P in the present embodiment
The method of manufacturing the DP is the same as that of the first embodiment, but differs in the method of forming the cross-linking of the phosphor ink in the step of forming the phosphor layer. FIG. 7 is a diagram illustrating a method for crosslinking the phosphor ink according to the present embodiment.

In this embodiment, first, as shown in FIG. 6, the phosphor ink 40 is applied to the end 15a of the rear glass substrate 15. For this application, the end 15a
Filling device 2 with a mechanism for applying phosphor ink 40 to ink
Alternatively, the phosphor 23 can be applied to the end 15a by discharging the phosphor ink from the nozzle 24 with the header 23 positioned at the end 15a. Alternatively, before mounting the rear glass substrate 15 to the ink filling device 20, the phosphor ink 40 may be applied to the end 15a using another device or tool.

Next, the header 23 is attached to the rear glass substrate 15.
The nozzle 24 is slowly moved in the direction of arrow A in FIG. 7 from the outside of the end 15a to contact the nozzle 24 with the phosphor ink 40 to crosslink the nozzle 24 and the end 15a with the phosphor ink. Subsequently, as in the first embodiment, the nozzle 24 is
By causing the phosphor ink to be ejected from the nozzles 24 while scanning along the 0, the groove 170 is filled with the phosphor ink while maintaining the crosslinking of the phosphor ink.

As described above, according to the method of the present embodiment,
During the scanning operation of the nozzle 24, the formation of the crosslinking of the phosphor ink and the filling of the phosphor ink can be continuously performed. (Other Matters) In the first to third embodiments,
An example has been shown in which red, green, and blue phosphor inks are sequentially filled using separate headers.
If three ink chambers and nozzles for each color are provided and three colors of phosphor ink are discharged in parallel to the plurality of grooves 170, the three colors of phosphor ink are filled in one scan. be able to.

In the first to third embodiments, an AC-type PDP has been described as an example. However, the present invention is not necessarily limited to the AC-type PDP.
It can be widely applied to DP.

[0051]

As described above, in the PDP manufacturing method and the phosphor layer forming apparatus of the present invention, in the step of forming the phosphor layer, the inner surface of the groove of the plate and the nozzle are cross-linked with the phosphor ink. By scanning the nozzles along the partition walls while discharging the phosphor ink from the nozzles and maintaining cross-linking, forming a continuous flow even when the phosphor ink is slowly discharged from the nozzles at a low pressure when scanning the nozzles Can be. Therefore, a uniform phosphor layer can be formed even when the nozzle is slowly scanned.

Further, since a continuous flow can be formed even if a relatively high-viscosity phosphor ink or a phosphor ink having a large surface tension is used, a wider range of phosphor ink materials can be selected. It is also possible to crosslink the phosphor ink between the nozzle and the side surface of the groove, thereby making it relatively easy to attach the phosphor ink to the side surface of the groove. Also,
At the time of scanning the nozzle, if the distance between the bottom of the groove of the first plate and the nozzle is kept at or below the height of the partition wall,
It is more effective to attach the phosphor ink to the side surface of the groove.

When crosslinking the phosphor ink,
If the distance between the plate and the nozzle is smaller than when the nozzle is scanned, the bridge can be easily formed.

[Brief description of the drawings]

FIG. 1 shows an AC surface discharge type P according to an embodiment of the present invention.
It is a schematic sectional drawing of DP.

FIG. 2 is a schematic configuration diagram of an ink filling device used when forming a phosphor layer of the PDP.

FIG. 3 is a perspective view showing a filling operation of the ink filling device.

FIG. 4 is a diagram for describing crosslinking of a phosphor ink.

FIG. 5 is a diagram showing a state in which phosphor ink is cross-linked between a nozzle and a side surface of a groove.

FIG. 6 is a cross-sectional view schematically illustrating a state where a phosphor ink is filled in the second embodiment.

FIG. 7 is a diagram showing a method for crosslinking a phosphor ink according to the third embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Front glass substrate 12 Discharge electrode 13 Dielectric glass layer 14 Protective layer 15 Back glass substrate 16 Address electrode 17 Partition wall 18 Phosphor layer 19 Discharge space 20 Ink filling device 21 Server 22 Pressure pump 23 Header 24 Nozzle 170 Groove 170a Bottom 170b Side 231 Ink chamber

Claims (11)

[Claims] A step of forming a phosphor layer by filling a groove between the partition walls while discharging a phosphor ink from a nozzle to a first plate having partition walls formed in a stripe shape on a surface thereof; Forming a phosphor layer on the side of the first plate, on which the partition wall is formed, by sealing the second plate on the side of the first plate and sealing a gas medium. The process includes a bridging step of bridging the inner surface of the groove of the first plate and the nozzle with the fluorescent ink, and discharging the fluorescent ink from the nozzle to maintain the bridging of the fluorescent ink while moving the nozzle along the partition wall. A method of manufacturing a plasma display panel, comprising: a scanning step of scanning. 2. The method according to claim 1, wherein in the scanning step, the nozzle and the first plate are scanned while being kept in a non-contact state. 3. The method according to claim 2, wherein in the scanning step, scanning is performed while maintaining a distance between a bottom of the groove of the first plate and the nozzle at 5 μm or more and 1 mm or less. 4. The scanning step, wherein the scanning is performed while maintaining the distance between the bottom of the groove of the first plate and the nozzle to be equal to or less than the height of the partition wall.
Or the method of manufacturing a plasma display panel according to 3. 5. The plasma according to claim 1, wherein in the bridging step, an interval between the bottom of the groove of the first plate and the nozzle is smaller than that in the scanning step. Display panel manufacturing method. 6. The cross-linking step, wherein a phosphor ink is attached to an end of the groove of the first plate, and cross-linking is performed by bringing a nozzle into contact with the attached phosphor ink. 6. The method for manufacturing a plasma display panel according to any one of claims 1 to 5. 7. In the scanning step, the phosphor ink discharged from the nozzle has a shear rate of 20.
The method according to any one of claims 1 to 6, wherein the viscosity at ⁰ sec ^-1 is 10 to 1000 centipoise. 8. The method for manufacturing a plasma display panel according to claim 1, wherein in the step of forming the phosphor layer, a nozzle having a nozzle diameter of 45 to 150 μm is used. 9. The scanning step, wherein the scanning is performed while discharging the phosphor ink from the plurality of nozzles to the plurality of grooves in parallel.
9. The method for manufacturing a plasma display panel according to any one of items 1 to 8. 10. The plasma display panel according to claim 9, wherein, in the scanning step, scanning is performed while discharging a plurality of color phosphor inks in parallel from a plurality of nozzles to a plurality of grooves. Production method. 11. A fluorescent plate of a plasma display panel, in which a phosphor layer is formed by filling a groove between the partition walls while discharging a phosphor ink from a nozzle to a plate having partition walls formed in a stripe shape on the surface. A body layer forming apparatus, comprising: a bridging means for bridging the inner surface of the groove of the plate and the nozzle with a phosphor ink; and discharging the phosphor ink from the nozzle to partition the nozzle while maintaining the cross-linking of the phosphor ink. And a scanning means for scanning along the surface of the phosphor layer.