KR100491477B1 - Production method of plasma display panel suitable for minute cell structure, the plasma display panel, and apparatus for displaying the plasma display panel - Google Patents

Abstract

In the case of a fine cell structure, it is easy to form a precise phosphor layer or a reflective layer, and when the partition is stripe-shaped, the phosphor layer or the reflective layer can be uniformly formed in the grooves between the partition walls, The present invention relates to a PDP capable of forming a phosphor layer or a reflective layer on the side surface. In the process of forming a phosphor layer or a reflective layer in a groove of a plate in which the partition wall is arranged in a stripe shape, the phosphor ink or the reflector ink is directed toward the side surface of the partition wall. The phosphor ink or the reflector ink was applied by scanning the nozzle along the partition wall while discharging the nozzle so as to be a continuous flow. At this time, the nozzle may be scanned along the partition wall while discharging the phosphor ink while the nozzle is directed toward the side surface of the partition wall. After applying the fluorescent ink to the grooves between the partition walls, external force is applied to the applied phosphor ink to the side surface of the partition wall. It may be attached to the. The step of crosslinking the inner surface of the groove of the plate and the nozzle with phosphor ink, discharging the phosphor ink from the nozzle, and scanning the nozzle along the partition wall while maintaining the crosslinking of the phosphor ink, or creating a plate having a recess formed between the partition wall and the partition wall. In this case, the side surface of the concave portion may be formed so that the adsorption force to the phosphor ink or the reflector ink is increased.

Description

Manufacturing method, plasma display panel and display device suitable for detailed cell structure

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel used in a display device, and more particularly to a manufacturing method suitable for a plasma display panel having a detailed cell structure.

Recently, while expectations for high-quality, large-screen televisions, including high-vision, are rising, displays suitable for this display in the fields of each display such as CRT, liquid crystal display (LCD), and plasma display panel (hereinafter referred to as PDP). Development is underway.

  CRT, which has been widely used as a display for television, is excellent in terms of resolution and image quality, but is unsuitable for large screens of 40 inches or more in terms of increasing depth and weight depending on the size of the screen. In addition, the LCD has excellent performance of low power consumption and low driving voltage. However, there is a technical difficulty in producing a large screen, and the viewing angle is limited.

On the other hand, the PDP can realize a large screen with a small depth, and a product of a 40-inch class has already been developed.

The PDP is generally arranged in parallel with the front cover plate and the back plate facing the electrode on the surface, and the gap between the two plates is partitioned by the partition wall, and the groove between the partition wall and the partition wall is red, green, The blue phosphor layer is formed and the discharge gas is enclosed, and the manufacturing is performed by forming the phosphor layer in the groove of the back plate on which the partition wall is formed, and superimposing the front cover plate thereon to seal the discharge gas. Then, the driving circuit is applied to the electrode for driving.

The principle of light emission of a PDP is basically the same as that of a fluorescent lamp. When a driving circuit is applied to an electrode and discharged, ultraviolet rays are emitted from the discharge gas, and phosphor particles (red, green, and blue) in the phosphor layer receive the ultraviolet rays and emit excitation, but are discharged. It is difficult to obtain high luminance, such as fluorescent lamps, because the efficiency of conversion to energy or ultraviolet rays or the efficiency of conversion from fluorescent material to visible light is low.

PDPs are roughly classified into a direct current type (DC type) and an alternating current type (AC type) by a driving method. In the DC type, the electrode is exposed to the discharge space, whereas in the AC type, a dielectric glass layer is disposed on the electrode.

Moreover, since the shape of a partition is also different, generally, in an AC type, a partition is arrange | positioned in stripe shape, whereas in a DC type, a partition is arrange | positioned in well shape. In this respect, the AC type is suitable for forming a panel having a fine cell structure.

However, as the demand for high quality display is increased, a fine cell structure is required in the PDP.

For example, in the conventional NTSC, the number of cells is 640 x 480, and in the 40-inch class, the cell pitch is 0.43 mm x l.29 mm and the area of one cell is about 0.55 mm2. The cell pitch in the 42-inch class is 0.15 mm x 0.48 mm, and the area of one cell is 0.072 mm2.

In order to put the practical PDP of such a detailed cell structure into practical use, it is necessary to increase the luminous efficiency of the cell as compared with the conventional one, and to this end, researches for improving the phosphor and the like have been made.

There is the following problem with respect to the formation of the phosphor layer under such a background.

As a method of forming the phosphor, as shown in Fig. 1, a screen printing method is often used to fill the recess between the partition walls and to bake it, but the screen printing method is applied to the PDP having a fine cell structure. This is difficult.

That is, when the cell pitch is about 0.1 mm to about 0.15 mm, the groove width between the partition walls becomes very narrow, about 0.08 mm to about 0.1 mm, but since the phosphor ink used for screen printing has a high viscosity (typically tens of thousands of centipoise ( cp)), it is difficult to flow phosphor ink at high speed with precision between narrow partitions. Moreover, it is also difficult to produce the screen board of a fine structure.

Moreover, in order to obtain PDP of high luminous efficiency, it can be said that it is preferable to set it as the structure which arrange | positions a fluorescent substance layer not only on the surface of a back plate but also in the side surface of a partition, and ensures a discharge space. In the screen printing method, if a phosphor layer having such a desired shape is to be formed, it is necessary to adhere the phosphor paste to the surface of the plate and the side surface of the partition by appropriate amounts, such as by adjusting the printing conditions such as the viscosity of the phosphor paste. It is difficult to adjust to the conditions, and in reality, there is a problem that the phosphor paste is hardly adhered to the side surface.

As a method of forming a phosphor layer other than the screen printing method, the photoresist film method and the inkjet method are also known.

In the photoresist film method, as disclosed in Japanese Patent Laid-Open No. 6-273925, a film of ultraviolet photosensitive resin containing each color phosphor is embedded between a partition wall and a partition wall to form a phosphor layer of a corresponding color. As a method of exposing to only a portion to be exposed and washing an unexposed portion, according to this method, it is possible to embed a film between partition walls with a certain degree of accuracy even when the cell pitch is small. However, since the process of embedding the film, exposing and washing the film for each of the three colors is necessary, the manufacturing process is complicated and mixed color tends to occur. In addition, the phosphor is recovered, although the phosphor is relatively expensive. There is also a problem that the price is high because it is difficult to do.

On the other hand, as disclosed in Japanese Patent Application Laid-Open No. 53-79371 or Japanese Patent Application Laid-open No. Hei 8-1620l9, the inkjet method is applied by scanning the ink liquid made of a phosphor and an organic binder while spraying it from a nozzle, thereby scanning the desired ink. As a method of adhering the ink liquid on the insulating substrate in a pattern, it is possible to apply ink to the recesses between the narrow partition walls with high accuracy.

However, in such a conventional inkjet method, the ejected ink becomes liquid droplets and is intermittently attached, so that when the partitions are arranged in a stripe shape, it is difficult to apply a constant film thickness to the grooves between the partition walls. In addition, like the screen printing method, there is a problem that the ink liquid concentrates on the bottom surface of the concave portion and adheres to the side surface.

By the way, in such a PDP, the technique which improves panel brightness by forming a reflective layer first in the recessed part between partitions, and forming a phosphor layer on the reflective layer is also known (for example, Unexamined-Japanese-Patent No. 4-332430). .

As a method of forming the reflective layer, a method of forming by applying a screen printing method to a paste containing a reflective material similarly to the phosphor layer is known, but the same problem as the formation of the phosphor layer, that is, the reflector paste is difficult to apply to a fine cell structure, There is a problem that it is difficult to attach to the side of the partition.

In addition, regarding the formation of the phosphor layer and the reflective layer, there is a problem that the phosphor and the reflector material are easily attached to the upper surface of the partition wall. In this case, when the back plate and the front cover plate are sealed, the adhesion between the upper part of the partition wall and the front cover plate tends to be impaired.

In the PDP, there is also a problem regarding electrode formation. That is, in the conventional PDP, the display electrode and the address electrode have a width of about 130 µm to l50 µm, and are usually formed by screen printing. However, in the case of high-vision televisions, as described above, the electrode width is about 70 µm. In addition, in high-precision 20-inch SXGA (pixel number of 1280 x 1024), the electrode width needs to be around 50 µm, so that it is difficult to form the electrode by the screen printing method.

According to the present invention, even in the case of a fine cell structure, the PDP can easily form a phosphor layer or a reflective layer with high accuracy, and in the case where the partition wall has a stripe shape, the PDP can uniformly form the phosphor layer or the reflective layer in the grooves between the partition walls. It is a first object of the present invention to provide a method for producing the same.

It is a second object of the present invention to provide a method for producing a PDP which can easily form a phosphor layer and a reflective layer on the side surface of the partition wall.

A third object is to prevent the phosphor or reflector from adhering to the upper surface of the partition wall when forming the phosphor layer or the reflective layer.

Further, a fourth object of the present invention is to provide a method for manufacturing a PDP that can easily form a display electrode or an address electrode even in a fine cell structure.

The first object is to form a phosphor layer or a reflective layer in a groove between partition walls in a plate in which the partition walls are arranged in a stripe shape. This can be achieved by coating the phosphor ink or the reflector ink by the scanning method according to the present invention.

Here, the first and second objects can be achieved by scanning the nozzles along the partition walls while ejecting the phosphor ink while the nozzles are directed toward the side surfaces of the partition walls.

Further, in the step of achieving the phosphor layer, the first and second objects are also applied by applying the fluorescent ink to the grooves between the partition walls and then applying an external force to the side surfaces of the partition walls by applying an external force to the applied phosphor ink. Can be achieved.

The first and second objects can also be achieved by scanning the nozzles along the partition walls while maintaining the state in which the grooves and the nozzles between the partition walls are bridged by the surface tension of the phosphor ink.

Further, the second object can also be attained by forming a plate having a recess formed between the partition walls so that the side surface of the recess is larger than the bottom of the recess so that the adsorption force to the phosphor ink or the reflector ink is increased.

The third object can be attained by forming the side surface on the side of the partition wall so that the adsorption force to the phosphor ink or the reflector ink is greater than the upper surface of the partition wall.

The fourth object can be attained by using a method of applying ink by scanning a nozzle while discharging ink containing an electrode material from the nozzle in a continuous flow in the step of disposing the electrode on a plate. .

The above and other objects and features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

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

(Embodiment 1)

(Overall Configuration and Manufacturing of PDP)

2 is a schematic cross-sectional view of an AC surface discharge type PDP according to an embodiment of the present invention. In FIG. 2, only one cell is illustrated, but PDPs are configured by alternately arranging a plurality of cells emitting red, green, and blue colors.

The PDP includes a front panel having a discharge electrode 12 and a dielectric glass layer 13 disposed on a front glass substrate 11, and an address electrode 16, a partition 17, and a phosphor on a rear glass substrate 15. The rear panel on which the layers 18 are disposed is stacked to discharge gas in a discharge space 19 formed between the front panel and the rear panel, and the PDP is discharged by the driving circuit shown in FIG. It is applied to and driven by the electrode 12 and the address electrode 16.

In addition, although the discharge electrode 12 is shown in cross section for convenience in FIG. 2, the discharge electrode 12 is actually arrange | positioned in the direction along the surface of FIG. 2 so that it may form an orthogonal matrix with the address electrode 16. In FIG.

Fabrication of the front panel:

The front panel forms a discharge electrode 12 on the front glass substrate 11, covers the lead electrode with a dielectric-based dielectric glass layer 13 thereon, and a protective layer 14 on the surface of the dielectric glass layer 13. It is produced by forming a.

The discharge electrode 12 is a silver electrode, and may be formed by a conventional method formed by screen printing and baking a silver paste for an electrode. In this embodiment, the discharge electrode 12 is formed using an inkjet method as described later.

The dielectric glass layer 13 is, for example, 70 wt% lead oxide (PbO), 15 wt% boron oxide (B ₂ O ₃ ), 10 wt% silicon oxide (SiO ₂ ), and 5 wt% oxidation The composition obtained by mixing aluminum and an organic binder (dissolved 10% ethyl cellulose in α-tapineol) was applied by screen printing and then baked at 520 ° C. for 20 minutes to form a film thickness of about 30 μm. do.

The protective layer 14 is made of magnesium oxide (MgO), and is formed to have a film thickness of 0.5 mu m by the sputtering method, for example.

Fabrication of the back panel:

The address electrode 16 is formed on the rear glass substrate 15 using the inkjet method similarly to the discharge electrode 12.

Next, the barrier rib 17 is formed by repeating screen printing of a glass material and baking.

The phosphor layer 18 is formed in the grooves between the partition walls 17. Although the formation method of the said phosphor layer 18 is mentioned later, it forms by applying and baking phosphor ink by the method of scanning, spraying a phosphor ink continuously from a nozzle.

In the present embodiment, the height of the partition wall is 0.1 to 0.15 mm and the pitch of the partition wall is 0.15 to 0.3 mm in accordance with the 40-inch high-vision television.

Production of PDP by panel lamination:

Next, the front panel and the back panel fabricated in this way are laminated using sealing glass, and at the same time, a high vacuum (for example, 8 × 10 ^-7 Torr) is formed in the discharge space 19 partitioned by the partition wall 17. After evacuating, the PDP is produced by encapsulating a discharge gas (for example, an inert gas of He-Xe or Ne-Xe system) at a predetermined pressure.

Next, a circuit block for driving the PDP is mounted as shown in FIG. 3 to manufacture a PDP display device.

In the present embodiment, the content of Xe in the discharge gas is set to 5% by volume or more, and the filling pressure is set in the range of 500 to 800 Torr.

(Method for Forming Electrode and Phosphor Layer)

4 is a schematic configuration diagram of an ink coating device 20 used when forming the discharge electrode 12, the address electrode 16, and the phosphor layer 18. As shown in FIG.

As shown in FIG. 4, in the ink applying apparatus 20, electrode material ink or phosphor ink is stored in the server 21, and the pressure pump 22 pressurizes the ink and supplies it to the header 23. do. The ink chamber 23a and the nozzle 24 are provided in the header 23, and the ink pressurized and supplied to the ink chamber 23a is sprayed continuously from the nozzle 24. As shown in FIG.

The header 23 is integrally formed by including a portion of the ink chamber 23a or the nozzle 24 by machining and discharging a metal material.

The electrode material ink is a combination of silver particles, which are electrode materials, to have a suitable viscosity together with glass particles, a binder, a solvent component, and the like.

The phosphor ink is a combination of each of the phosphor particles, silica, a binder, a solvent component, and the like to have an appropriate viscosity.

As the phosphor particles constituting the phosphor ink, those generally used for the phosphor layer of the PDP can be used. As the specific example,

Blue phosphor: BaMgA1 ₁₀ O ₁₇ : Eu ²⁺

Green phosphor: BaAl ₁₂ O ₁₉ : Mn or Zn ₂ SiO ₄ : Mn

Red phosphor: (Y _x Gd _1-x ) BO ₃ : Eu ³⁺ or YBO ₃ : Eu ³⁺

Can be mentioned.

It is preferable that the average particle diameter of the silver particle used for electrode material ink, glass particle, and the fluorescent substance particle used for fluorescent substance ink be 5 micrometers or less in order to suppress the nozzle of a nozzle and precipitation of particle | grains. Moreover, in order for a fluorescent substance to obtain favorable luminous efficiency, it is good that the average particle diameter of fluorescent substance shall be 0.5 micrometer or more. Therefore, silver particle, glass particle, and fluorescent substance are used here in the range of 0.5-5 micrometers (2-3 micrometers).

Moreover, it is preferable to adjust the electrode material ink to 100-1000 cm poise in 25 degreeC within the range of 1000 cm poise or less (10-1000 cm poise) at 25 degreeC.

The particle diameter of silica as an additive is 0.01-0.02 micrometer, 1-10 weight% is preferable, and also it is preferable to add 0.1-5 weight% of a dispersing agent and 0.1-1 weight% of a plasticizer.

It is preferable to set the diameter of the nozzle 24 smaller than the groove width W between the partition walls 17 at 45 micrometers or more in order to prevent the nozzle from loading, and usually to set it to 45-150 micrometers.

In the server 21, the ink is mixed and agitated by an agitator (not shown) provided in the server 21 so that particles (electrode material, phosphor particles, etc.) in the ink do not precipitate.

The pressing force of the pressure pump 22 is adjusted so that the flow of ink ejected from the nozzle 24 becomes a continuous flow.

The header 23 is configured to scan the front glass substrate 11 or the rear glass substrate 15. The header 23 is scanned by a header syringe opening (not shown) which drives the header 23 in a straight line in this embodiment. However, the header 23 may be fixed to drive the glass substrate in a straight line.

Ink is uniformly applied in a line shape on the glass substrate by spraying the ink from the nozzle 24 to form a continuous ink stream 25 (jet line) while scanning the header 23.

In the ink coating device 20, as shown in FIG. 5, a plurality of nozzles may be provided in the header 23, and the nozzle 23 may be configured to scan while injecting ink in parallel (FIG. 5). Arrow A in the scanning direction). In this way, when the plurality of nozzles 24 are provided, the plurality of ink lines 26 can be applied in one operation.

In this way, the electrode electrode ink is applied onto the front glass substrate 11 using the ink coating device 20 to form the discharge electrode 12, and the electrode material ink is applied onto the rear glass substrate 15. The address electrode 16 is formed.

In addition, the discharge electrode 12 and the address electrode 16 formed in this way are baked together at the time of baking the dielectric glass layer 13 and the partition 17.

On the other hand, the phosphor ink is applied by the ink coating device 20 on the rear glass substrate 15 along the partition wall 17 for each of red, blue, and green colors. Subsequently, red, green, and blue phosphor inks are sequentially applied to predetermined grooves and dried, and then the panel is baked (at about 500 ° C. for 10 minutes) to form the phosphor layer 18.

As described above, the phosphor layer 18 is not formed by applying ink as a liquid drop as in the conventional inkjet method, but is formed by applying ink continuously, so that the thickness of the layer is uniform.

In the ink coating apparatus as described above, a single ink header is provided with three ink chambers of red, blue, and green, and nozzles of each color, and sprays three fluorescent materials in parallel. Three colors of phosphor ink may be applied.

(Examples 1 to 5)

Based on Embodiment 1, the PDP of Examples 1-5 was produced.

Table 1 lists the compositions and ink viscosities of the electrode material ink (Ag ink) and the phosphor ink used in the first to fifth examples.

In Examples 1 to 5, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ was used as the blue phosphor, Zn ₂ SiO ₄ : Mn was used as the green phosphor, and (Y _x Gd _1-x ) BO ₃ : Eu ³⁺ was used as the red phosphor. .

The composition of the glass used for the electrode material ink (silver ink) in the table is 70% by weight of lead oxide (PbO), 15% by weight of silicon oxide (SiO ₂ ), and 15% by weight of boron oxide (B ₂ O ₃ ). Moreover, the molecular weight of ethyl cellulose used as a binder is 200,000, and the molecular weight of acrylic resin is 100,000.

In the first embodiment, the electrode 12, 16 having an electrode width of 60 mu m was formed by discharging electrode material ink while scanning using a nozzle having a nozzle diameter of 50 mu m, maintaining the distance between the nozzle tip and the rear glass substrate at 1 mm. .

The space | interval (cell pitch) of the partition 17 was set to 0.15 mm, and height was set to 0.15 m.

As the discharge gas, a neon gas containing 10% of quenon (Xe) gas was used, and the sealing pressure was 500 Torr.

In Examples 2-5, the electrodes 12 and 16 were formed in the nozzle width of 45 micrometers with the nozzle of 45 micrometers in diameter, and the space | interval (cell pitch) of the partition 17 was set to 0.106 mm and 0.10 mm in height. .

As the discharge gas, a neon gas containing 20% quenone (Xe) gas was used, and the sealing pressure was 600 Torr.

In the PDPs of Examples 1 to 5, the discharge was maintained at a discharge sustain voltage of 150 V at a frequency of 30 KHz, and luminance was measured. In addition, the conditions of luminance measurement are the same also in a following example.

The wavelength of the ultraviolet ray was an excitation wavelength due to a molecular beam of Xe mainly about 173 nm. The measurement result of the luminance was as shown in Table 1.

(Embodiment 2)

Although the structure and manufacturing method of the PDP of this embodiment are the same as that of Embodiment 1, there exist some differences in the formation method of a phosphor layer. Hereinafter, a method of forming the phosphor layer in the grooves between the partition walls of the rear glass substrate 15 will be described.

6 is a schematic configuration diagram of an ink coating apparatus used when forming the phosphor layer 18 in this embodiment. 7 is a partially enlarged perspective view showing the application operation.

The ink coating device 20 is also the same as that used in Embodiment 1, and the phosphor ink is stored in the server 21, and the pressure pump 22 pressurizes the phosphor ink and supplies it to the header 23. Moreover, the ink chamber 23a and the some nozzle 24 are provided in the header 23, and the pressurized fluorescent substance ink is distributed from the ink chamber 23a to each nozzle 24, and is sprayed continuously. .

However, in the ink coating device 20 of this embodiment, the injection direction of each nozzle 24 is inclined toward one partition rather than perpendicular | vertical with respect to the back glass substrate 15 as shown to FIG. 6, FIG. (In Fig. 8A, this inclination angle is indicated by θ). The ink flows 25 ejected from the nozzles 24 by this inclination collide with the side surfaces of the partition walls, not the central portion of the grooves between the partition walls.

Therefore, the phosphor ink is uniformly applied to the grooves between the partition walls of the rear glass substrate 15 as in the first embodiment, but in this embodiment, the phosphor ink can be applied again to the upper side of the partition walls 17. Therefore, the phosphor layer 18 having a larger emission area can be formed.

Hereinafter, the operation and effects of the ink coating apparatus 20 will be described in more detail with reference to FIGS. 5 to 8.

In the ink coating device 20, the header 23 is included for each color of red, blue, and green, and the pitch of the nozzle 24 formed in the header 23 of each color is set to three times the cell pitch. As shown in Figs. 6 and 7, the phosphor ink is filled into every two grooves in accordance with the scanning of the header 23. Figs.

After filling the phosphor ink in a predetermined groove while scanning the header 23 in the direction of arrow A in Fig. 5, the header 23 is rotated to replace the positions of the end 23b and the end 23c, and arrow A again. The phosphor ink can be attached to the side surfaces of both partition walls by filling the phosphor ink again in the grooves filled with the phosphor ink while scanning in the direction of (or the direction opposite to the arrow A).

8A and 8B are views for explaining the effect of the method for applying the phosphor ink of the present embodiment.

In FIG. 8, 24a shows the attitude of the nozzle 24 when scanning the header 23 for the first time, 25a shows the continuous ink flow formed in the attitude, and 24b shows the header 23 again. The attitude | position of the nozzle 24 at the time of illustration is shown, and 25b shows the ink forms continuously formed in that attitude | position.

Inks 25a and 25b are inclined by the angle θ in the direction of the left and right partition walls from the direction perpendicular to the rear glass substrate 15, so that the ink streams 25a and 25b are formed at the upper end portions of the side walls of the partition walls 17. After colliding with, the phosphor ink can be attached to the upper side of each partition wall by flowing to the bottom along the side. The solid line 26 in the figure shows the liquid level of the phosphor ink thus filled.

On the other hand, Fig. 8B shows a state in which the ink 25 injected from the nozzle 24 is perpendicular to the rear glass substrate 15 at the center portion of the groove between the partition walls. In this case, the partition walls Phosphor ink is less likely to adhere to the side surface of the ink, and the liquid surface of the applied phosphor ink exhibits the same tendency as the solid line 27 in the drawing.

Moreover, in the header 23 of the ink application apparatus 20 of this embodiment, two nozzles 24 are arrange | positioned toward both sides of the groove | channel which apply | coats ink, and fluorescent substance ink is sprayed side by side from two nozzles. In this way, the phosphor ink can be attached to both sides of the groove in one scan.

Table 2 shows the composition of the electrode material ink (Ag ink) and the phosphor ink used in the following sixth to thirteenth examples, the ink viscosity and the luminance measurement results of the panel.

Also in Examples 6 to 13, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ as a blue phosphor, Zn ₂ SiO ₄ : Mn as a green phosphor, and (Y _x Gd _1-x ) BO ₃ : Eu ³⁺ were used as a red phosphor. .

(Example 6)

Based on Embodiment 2, No. The PDP was produced using the composition shown in 6, the electrode material ink (Ag ink) of the viscosity range, and fluorescent substance ink.

As the discharge gas, a neon gas containing 5% quenon (Xe) gas was used, and the sealing pressure was 500 Torr. The panel brightness was as shown in Table 2, and the wavelength of ultraviolet-ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

(Embodiment 3)

Although the whole structure and manufacturing method of the PDP of this embodiment are the same as that of Embodiment 1, the coating method of fluorescent substance ink at the time of formation of a fluorescent substance layer differs.

FIG. 9 is a view for explaining a method of applying the phosphor ink in the present embodiment, and shows a rear surface of the rear glass substrate 15 and the header of the ink application apparatus along the partition wall 17. FIG. In addition, arrow A in a figure shows a scanning direction.

The ink coating apparatus of this embodiment is the same as the ink coating apparatus 20 of Embodiment 1, but as shown in FIG. 9, the header 33 has an air chamber (in addition to the ink chamber 33a and the plurality of nozzles 34). 33b) and a plurality of air injection nozzles 36 are provided, and compressed air is sent to the air chamber 33b from a compressor (not shown).

The air injection nozzles 36 are arranged at the rear side of each nozzle 34 (the rear side with respect to the scanning direction of the header 33).

The phosphor ink ejected from the nozzle 34 by using the ink coating device having such a configuration forms a continuous ink stream, is applied to the grooves between the partition walls (see FIG. 10 (a)), and thereafter, the air jet nozzle The air stream 37 blown out from the 36 pushes the phosphor ink applied to the center portion of the groove (see the arrow 37a in FIG. 10 (b)) and pushes it in the lateral direction of the partition wall 17. The air stream 37 flows along the liquid level 38 of the phosphor ink (see arrow 37b in FIG. 10), and the phosphor ink is raised along the side of the partition wall 17.

Since the air flow 37 raises the phosphor ink 35 and also performs drying thereof, the phosphor ink raised to the side is fixed to the side. In this manner, the phosphor layer on the side surface of the partition wall can be easily formed.

Although the width of the air stream 37 is set smaller than the dimension between the partition walls, the momentum of the air stream is appropriately adjusted according to the coating amount and physical properties of the phosphor ink or the wettability of the phosphor ink and the partition wall.

In the ink coating device of the present embodiment, when the compressed air heated in the air chamber 33b is supplied to eject the heated air from the air jet nozzle 36, the drying power of the phosphor ink by the air flow is improved. As a result, the adhesion amount of the phosphor to the side surface of the partition wall increases.

(Example 7)

Based on the third embodiment, the No. PDP was produced using the composition shown in 7, the electrode material ink (Ag ink) of the viscosity range, and fluorescent substance ink.

 As the discharge gas, a neon gas containing 6% of quenon (Xe) gas was used, and the sealing pressure was 500 Torr.

As shown in Table 2, the panel brightness was an excitation wavelength due to a molecular beam of Xe mainly having a wavelength of 173 nm.

(Embodiment 4)

Although this embodiment is the same as that of Embodiment 3, at the time of fluorescent substance formation, it raises to the side surface of a partition wall by adding pressure other than airflow to the phosphor ink apply | coated to the groove | channel between partition walls.

In the header 43 shown in FIG. 11, the ink stirring rod 46 is provided just behind the nozzle 44. As shown in FIG. In addition, arrow A in a figure shows a scanning direction.

In the case of using the header 43, the phosphor ink 48 filled in the groove from the nozzle 44 is pushed to the side of the partition wall by the rod 46, and rises along the side, so that the phosphor ink up to the top of the side Attached.

In addition, the penetration depth of the rod 46 into the ink liquid level is appropriately adjusted according to the filling amount and physical properties of the phosphor ink or the wettability of the phosphor ink and the partition wall.

Although the description by the drawings is omitted, instead of scanning the rod after the phosphor ink is applied to the grooves between the partition walls, a wire supported in the direction along the partition walls is inserted into the grooves to push out the phosphor ink filled in the center of the grooves. The same effect can be obtained also by adhering to the side surface of a partition.

In addition, after the phosphor ink is applied to the groove, the rear glass substrate is vibrated to raise the phosphor ink to the side of the partition wall or the rear glass substrate is reversed so that the phosphor ink transfers the side surface of the partition wall by gravity. It can use and can expect the same effect.

In the process of forming the phosphor layer described in the above Embodiments 2 to 4, the solvent component of the phosphor ink adhering to the side surface of the partition wall quickly evaporates and the ink flowability disappears when the back glass substrate is heated. Formation of a layer can be performed more favorably.

In this case, it is also preferable that the heating temperature of the back glass substrate is 200 ° C or lower.

(Embodiment 5)

Although this embodiment is the same as that of Embodiment 1, the point which scans a nozzle in the state which fluorescent substance ink was bridge | crosslinked at the time of formation of a phosphor layer differs.

12 is a schematic cross-sectional view showing a coating state of the phosphor ink in the present embodiment.

The structure of the ink coating device is the same as that of the ink coating device 20 of FIG. 4, but the surface of the phosphor ions 50 discharged from the nozzle 24 at the time of scanning is between the groove inner surfaces of the partition walls of the rear glass substrate 15. Scanning is performed while maintaining the state of crosslinking by tension.

In order to maintain the state of crosslinking the ink by surface tension in this manner, it is necessary to properly maintain the distance between the nozzle 24 and the back plate. Usually, by setting the distance in the range of 5 µm to 1 mm, a stable coating is applied. You can get it.

Although the optimum value of the aperture 24 (nozzle diameter) of the nozzle 24 exists by the space | interval of a partition and the exposure amount of ink, it is preferable to set it as the range of 45-159 micrometers normally.

When the nozzle is scanned while crosslinking the ink as described above, the phosphor ink discharged from the nozzle 24 can be stably applied to the grooves between the partition walls of the rear glass substrate 15 regardless of the scanning speed. That is, according to this embodiment, since the continuous flow of ink can be formed even if the speed of scanning is delayed, an expensive apparatus for scanning at high speed becomes unnecessary.

Therefore, uniform coating can be realized with an inexpensive ink coating device.

In addition, when scanning while forming crosslinking of the ink between the nozzle and the side surface of the partition wall, the ink can be attached to the upper part of the side surface of the partition wall.

As the phosphor ink, those similar to those described in the first embodiment may be used. However, in the case where the ink is not crosslinked, it is preferable to form a continuous flow even when ejecting a high viscosity phosphor ink or a phosphor ink having a large surface tension from the nozzle. On the other hand, if it is applied in a state in which crosslinking is formed as in the present embodiment, continuous flow can be formed even by using a relatively high viscosity phosphor ink or a phosphor ink having a large surface tension.

Therefore, the viscosity and surface tension of the phosphor ink to be used are less restricted, and the selection range of the ink material can be further widened.

In this way, the method of applying the phosphor ink while crosslinking can also be performed using the header 23 having the plurality of nozzles 24 shown in FIG. 5.

In addition, if three ink chambers of red, blue, and green and nozzles of each color are provided in one header and three phosphor ink is applied in parallel, three phosphor ink can be applied in one scan. have.

However, in order to stably apply the phosphor ink stably, it is preferable to form a crosslinked state of the ink between the nozzle tip and the grooves of the rear glass substrate 15 before starting the application of the ink.

As a method of this crosslinking, the following is considered.

(1) Before scanning the nozzle, the nozzle is stopped at the end of the rear glass substrate 15 and the ink is discharged to some extent from the nozzle to form a bridge between the nozzle tip and the rear glass substrate 15.

(2) Bridge formation of (1) is performed in a state where the distance between the nozzle tip and the back glass substrate 15 is closer than the distance at the time of scanning. Thereafter, the coating is carried out at a distance at the time of scanning.

③ First, as shown in FIG. 13, the ink 60 is applied to the end 15c of the rear glass substrate 15. As shown in FIG.

A mechanism for applying the ink 60 to the end portion 15c for this application may be provided separately in the ink application apparatus, but the end portion 15c is located at the end portion 15c by discharging ink from the nozzle. ), The phosphor ink 60 can be applied. Alternatively, the ink 60 may be applied to the end portion 15c using a separate device or a tool before the rear glass substrate 15 is attached to the ink coating device.

Next, the tip of the nozzle is brought into contact with the ink 60 to form a bridge. Subsequently, ink is ejected from the nozzle and applied while scanning the nozzle. According to this method, formation of bridge | crosslinking and operation | movement of application | coating can be performed continuously.

(Example 8)

Based on the fifth embodiment, the No. PDP was produced using the electrode material ink (Ag ink) and fluorescent substance ink of the composition shown in 8.

When the phosphor ink is applied, the viscosity of the phosphor ink is 10 to 1000 cm poise at 25 ° C., and when pressurized at 0.5 kgf / cm ² using a nozzle having a nozzle diameter of 80 μm, the phosphor ink is discharged from the nozzle. Phosphor ink was bridged between the tip portion and the partition wall 17 by surface tension.

By maintaining the distance between the tip of the nozzle and the back plate at 100 占 퐉, the rear glass substrate 15 was moved and scanned at a speed of 50 mm / s, whereby the phosphor ink was continuously applied to the grooves between the partition walls.

In addition, under the above conditions, since the ejection amount of the ink is small, continuous flow is not formed when the phosphor ink is ejected from the nozzle under such ejection conditions without crosslinking being formed.

After applying the phosphor ink of each color, it baked at about 500 degreeC for 10 minutes, and formed the phosphor layer.

As the discharge gas, a neon gas containing 5% of quenon (Xe) gas was used, and the sealing pressure was 600 Torr.

The panel brightness was as shown in Table 2, and the wavelength of ultraviolet-ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

(Embodiment 6)

Fig. 14 is a diagram showing the application state of the phosphor ink in the present embodiment.

In this embodiment, similarly to the fifth embodiment, the phosphor ink is applied in a cross-linked state, but the coating is performed while the nozzle is inserted into the groove between the partition walls.

Thus, by scanning in the state which inserted the nozzle 24 in the center of a groove | channel, it can apply to a groove | channel uniformly in the state which bridged ink similarly to Embodiment 5.

In addition, since the nozzle 24 also pushes out the ink existing in the center portion of the groove and attaches the ink to the upper side of the partition, it is easy to form a phosphor layer on the side of the partition.

Although the outer diameter of the nozzle 24 is smaller than the distance between the partition walls, the penetration depth and the like of the nozzle 24 into the ink liquid level are appropriately adjusted according to the filling amount and physical properties of the phosphor ink or the wettability of the phosphor ink and the partition wall.

(Ninth embodiment)

Based on Embodiment 6, the No. PDP was produced using the electrode material ink (Ag ink) and fluorescent substance ink of the composition shown in FIG.

The height of a partition was set to 120 micrometers.

When the phosphor ink was applied, the distance between the nozzle tip and the back glass substrate 15 was set to 20 m.

The viscosity of the phosphor ink was 10 to 1000 cm poise at 25 ° C.

As the discharge gas, a neon gas containing 10% of quenon (Xe) gas was used, and the sealing pressure was 500 Torr.

The panel brightness was as shown in Table 2, and the wavelength of ultraviolet-ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

(Embodiment 7)

Although the structure and manufacturing method of the PDP of this embodiment are the same as that of the PDP of Embodiment 1, there exists a difference in the formation method of the partition 17 and the phosphor layer 18. FIG.

That is, in this embodiment, the material which forms a partition is selected so that the contact angle with respect to the side surface of the partition 17 of fluorescent substance ink may be 900 degrees or less, and smaller than the contact angle with respect to the bottom face of the recessed part (groove), and the partition 17 will be made into contact. Form. By adjusting in this way, fluorescent substance ink becomes easy to adhere to the side surface of the partition 17.

The partition wall 17 can be produced by a method such as a screen printing method, but can also be formed by a thermal spraying method as described below.

15A to 15F are explanatory views of a method of forming a partition wall by a thermal spraying method.

First, the surface of the back glass substrate 15 (FIG. 15A) on which the address electrode 16 is formed is covered with a dry film 81 made of acrylic photosensitive resin (FIG. 15B).

The dry film 81 is patterned by photolithography. That is, the ultraviolet light (UV) is irradiated only to the portion where the photomask 82 is to be formed on the dry film 81 to form a partition (FIG. 15C), and the dry film of the part forming the partition by developing 81), the mask of the dry film 81 is formed only in the part which does not form a partition (refer FIG. 15 (d)). Moreover, image development is performed in about 1% of alkali aqueous solution (specifically, sodium carbonate aqueous solution).

Then, plasma-spray the mixture of alumina and glass which are the raw materials of the partition wall.

It is explanatory drawing about the plasma spraying.

In the plasma spraying device 90, a voltage is applied between the cathode 91 and the anode 92 to generate an arc discharge at the tip of the cathode 91, to send argon gas therein, and to generate a plasma jet. Then, a powder of a raw material (a mixture of alumina and glass) is sent therein, and the raw material is melted in a plasma jet and sprayed onto the surface of the substrate 15. As a result, a film 84 of raw material is formed on the surface of the substrate 15.

Thus, the board | substrate 15 with which the film 84 was formed (FIG. 15E) is submerged in peeling liquid (sodium hydroxide solution), and the mask of the dry film 81 is removed (lift-off method). Accordingly, the portion 84b formed on the mask of the dry film 81 of the film 84 of the raw material is removed, and only the portion 84a formed directly on the substrate 15 remains, which becomes the partition 17 ( (F) of FIG.

As described above, the partition wall 17 is formed of a mixture of alumina and glass such that the contact angle of the phosphor ink with respect to the partition wall 17 is smaller than the contact angle with respect to the substrate 15 (Fig. 18B). The adsorption force to the phosphor ink of a) can be made larger than the adsorption force to the phosphor ink of the bottom surface 170a (see FIG. 18A) of the concave portion. In addition, as a material of the partition wall, in addition to using a mixture of alumina, zirconia, zirconia and glass, it is possible to similarly adjust the adsorption power to the phosphor ink.

17 is a schematic configuration diagram of an ink coating apparatus 100 used when forming the phosphor layer 18.

The ink coating device 100 has the same configuration as the ink coating device 20 of FIG. 4, and the header 103 is provided with a plurality of protruding nozzles 24, and the phosphor ink is separated from the ink chamber 103a. It is distributed to the nozzle 24 and is discharged continuously.

As the phosphor ink to be used, one similar to that described in Embodiment 1 may be used, but it is preferable to have a composition that is easily adhered to the side surface 170b of the recess, and 0.1 to 10% by weight of ethyl cellulose is used as the binder, Using tapineol (C ₁₀ H ₁₈ O) as a relatively good result.

Moreover, as a solvent used other than that, organic solvents, such as diethylene glycol methyl ether, and water are mentioned, As a binder, polymers, such as PMMA and polyvinyl alcohol, are mentioned.

The diameter of the nozzle 24 is smaller than the groove width W between the partition walls 17, and is usually set to 150 µm or less and 45 µm or more in order to prevent the nozzle from being loaded.

By using the ink coating device 100, the phosphor ink is coated while crosslinking the phosphor ink between the nozzle 24 and the inner surface of the recess 170 as follows.

First, the header 103 is positioned at the end of the rear glass substrate 15, and the nozzle 24 and the inner surface of the recess 170 of the rear glass substrate 15 are sufficiently brought into close contact or contact with each other from the nozzle 24. By discharging a small amount of phosphor ink, crosslinking is formed by the surface tension of the phosphor ink.

Subsequently, the pressurizing pump 22 is operated while scanning the header 103 to continuously discharge the phosphor ink from the nozzle 24 to apply the phosphor ink to the recess 170 of the back glass substrate 15. At this time, the distance between the nozzle 24 and the bottom surface 170a is kept small (typically 1 mm or less), and the phosphor ink formed between the inner surface of the recess 170 of the rear glass substrate 15 and the nozzle 24. Scan while maintaining the crosslinking by the surface tension.

In addition, it is preferable that the nozzle 24 and the rear glass substrate 15 do not come into contact during scanning. However, since some irregularities exist on the surface of the recess 170 of the rear glass substrate 15, the nozzle 24 and It is preferable that the space | interval of the bottom face 170a of the recessed part 170 shall be 5 micrometers or more.

The pressure of the pressure pump 22 at the time of scanning is adjusted so that it may become an appropriate discharge amount based on the filling amount to the recessed part 170, and the scanning speed of the nozzle 24. FIG.

In this embodiment, scanning is performed at a slow speed of about several tens of mm / s, and the discharge amount is reduced by setting the pressure of the pressure pump 22 to be small, but since the continuous flow is formed by crosslinking of the phosphor ink, the phosphor ink is recessed ( It is applied uniformly to 170, it can form a uniform phosphor layer.

Further, in order to attach a large amount of phosphor ink to the side surface 170b of the recess 170, the filling amount of the phosphor ink into the recess 170 is set to be 80% or more of the space volume of the recess 170, and the phosphor ink It is preferable to set content of fluorescent substance in 20 to 60weight% of a range.

(Description of the effect)

FIG. 18A is a schematic diagram showing a drying process of the phosphor ink filled in the recesses in the case where the adsorption force to the ink of the partition wall is adjusted as in the present embodiment.

In this embodiment, since the adsorption force of the recessed part 170 side surface 170b with respect to the fluorescent ink is larger than the adsorption force with respect to the fluorescent ink of the bottom face 170a, phosphor ink does not fall to the bottom face 170a side during drying, 170b) also remains attached.

Further, as shown in Fig. 18A, when the phosphor ink is filled to occupy 80% or more of the space volume of the recess 170, the effect of adhering the phosphor ink to the side surface 170b is remarkable.

On the other hand, Fig. 18B is a schematic diagram showing the drying process of the phosphor ink when the adsorption force to the phosphor ink on the side of the recess is smaller than the adsorption force to the phosphor ink on the bottom face. In this case, as shown in the figure, the phosphor ink easily falls on the bottom side during drying and hardly remains on the side.

As described above, according to the manufacturing method of the PDP of the present embodiment, the phosphor layer can be formed uniformly along the partition wall, and the phosphor layer can also be attached to the side surface of the recess. Therefore, a PDP with high luminescence brightness can be produced.

In addition, the material of the partition 17 is not limited to the above-mentioned material, What is necessary is just to select so that the contact angle with respect to the side surface of the partition 17 of fluorescent substance ink may become smaller than the contact angle with respect to the bottom face of a recessed part. However, it is preferable that the contact angle with respect to the side surface of the partition 17 of fluorescent substance ink is 90 degrees or less in order to obtain favorable adhesion to the said side surface.

In this embodiment, as the material of the partition 17, the contact angle with respect to the partition 17 of the phosphor ink is smaller than that of the rear glass substrate 15, so that the adsorption force on the phosphor ink on the side of the partition 17 is increased. Although adjustment was made to be smaller than the adsorption force to the phosphor ink on the bottom of the recess, the adsorption force to the phosphor ink is influenced not only by the contact angle to the surface of the phosphor ink, but also by the surface roughness. That is, the greater the surface roughness, the greater the adsorption force to the phosphor ink.

Therefore, the same effect can be obtained also by making the surface roughness of a recess side surface larger than the surface roughness of a recess bottom face.

The surface roughness can be adjusted in advance by reducing the surface roughness by polishing the surface of the substrate 15 in advance or by forming a partition by the thermal spraying method (for example, the flow rate or applied voltage of argon gas). When the barrier ribs are formed to be large or formed by screen printing, the firing temperature can be lowered to increase the surface roughness.

Moreover, the effect becomes more remarkable when the contact angle with respect to the recessed side surface of fluorescent substance ink is made smaller than the contact angle with respect to the bottom surface of a recessed part, and the surface roughness of a recessed side surface is larger than the surface roughness of a bottom face.

Moreover, in this embodiment, although the case where it apply | coated while bridge | crosslinking fluorescent substance ink from the nozzle was demonstrated, it can implement similarly also by another application method. For example, even when a normal inkjet method or a screen printing method is used, the same effect can be obtained by making the adsorption force to the phosphor ink on the side of the recess larger than that to the phosphor ink on the bottom.

10th Example

Based on Embodiment 7, the No. of Table 2 mentioned above. PDP was produced using the electrode material ink (Ag ink) and fluorescent substance ink of the composition shown in FIG.

The partition wall of the back panel was formed using the mixture of alumina and glass, and was made into pitch 140 micrometers, width 30 micrometers, and height 120 micrometers.

The contact angle of the phosphor ink with respect to the side face 170b of the formed partition and the bottom face 170a of the recessed part 170 was measured visually. In addition, surface roughness was measured according to the surface roughness measuring method (ten point average roughness) of a JIS standard.

The contact angle with respect to the side surface 170b of the phosphor ink is about 8 degrees, the surface roughness of the side surface 170b is about 5 micrometers, the contact angle with respect to the bottom surface 170a of the phosphor ink is about 13 degrees, and The surface roughness was about 0.5 μm.

The nozzle 44 has a nozzle diameter of 80 µm, and at the time of scanning, the distance between the tip of the nozzle and the bottom of the concave portion is set to 100 µm, and is scanned at a speed of 50 mm / s while pressing at 0.5 kgf / cm ² to form a phosphor. Ink was applied to fill approximately 90% of the volume of the recesses.

After filling and drying the phosphor ink of each color, the phosphor layer was formed by baking at about 500 degreeC for 10 minutes.

SEM observation of the cross-sectional shape of each of the formed color phosphor layers showed that the average thickness at the bottom of the concave portion was about 20 µm and the average thickness at the side surface was about 25 µm. Confirmed.

As the discharge gas, a neon (Ne) gas containing 5% quenon (Xe) gas was used, and the sealing pressure was 800 Torr.

The panel brightness was as shown in Table 2, and the wavelength of ultraviolet-ray was an excitation wavelength by the Xe injection line mainly centering on 173 nm.

(Eighth embodiment)

Although the manufacturing method of the PDP of this embodiment is the same as that of Embodiment 7, in Embodiment 7, about the contact angle with respect to the recessed part side of fluorescent substance ink being smaller than the contact angle with respect to the bottom face of a recessed part by selecting the material of a partition. In this embodiment, the contact angle with respect to the concave side of the phosphor ink is adjusted to be smaller than the contact angle with respect to the bottom of the concave by forming a film that increases the contact angle with respect to the bottom of the concave portion of the phosphor ink.

The formation of the film on the bottom surface of the concave portion, for example, melts a fluororesin including polytetrafluoroethylene at a high temperature on the surface of the rear glass substrate 15 and applies it by spin coating to form a rear glass substrate 15. Can be performed by forming the address electrode 16 and the partition wall 17 on the ().

Then, after forming such a film, if the phosphor ink is filled in the recess in the same manner as in the seventh embodiment, the contact angle with respect to the side of the recess of the phosphor ink is smaller than the contact angle with respect to the bottom surface, as shown in Fig. 18A. As shown, a large amount of phosphor ink is attached to the side surface.

By baking this, a good phosphor layer is formed on the bottom and side surfaces of the recess. In the case where the above-mentioned rupture film is formed of an organic compound such as a fluorine resin, the film is lost during firing of the phosphor layer, and thus the film is not left in the finished PDP.

In addition, although the case where it apply | coated by the inkjet system was demonstrated in this embodiment, a coating method is not limited to this. For example, even in the screen printing method, the same effect can be obtained when the contact angle with respect to the side surface of the recessed part of fluorescent substance paste is smaller than the contact angle with respect to a bottom surface.

(Embodiment 9)

Fig. 19 is a diagram showing a state of phosphor ink application in the present embodiment.

The manufacturing method of the PDP in this embodiment is the same as the manufacturing method of Embodiment 7, but after forming the partition 17 on the back glass substrate 15, the partition of the adsorption with respect to the fluorescent substance ink on the upper surface of the partition 17 is partitioned. (17) The point of making it smaller than the adsorption with respect to the fluorescent substance ink of a side surface differs in apply | coating fluorescent substance ink after that.

As a method of making the adsorption of the upper surface of the partition 17 to the phosphor ink smaller than that of the phosphor ink on the side of the partition 17, a water repellent material is formed on the upper surface of the partition 17 as shown in FIG. The method of forming the made water repellent film 110 is mentioned.

The water repellent film 110 may be formed by applying a hydrofluoric acid resin including polytetrafluoroethylene to the upper surface of the partition wall 17.

Specifically, in the process of forming a partition by the thermal spraying method described in Embodiment 7, after the film 84 of the partition material is formed on the substrate 15 (the state (E) of FIG. 15), the dry film 81 If the molten hydrofluoric acid resin is applied by spin coating before removing the mask, a water repellent film 110 made of hydrofluoric acid resin may be formed on the upper surface of the partition wall 17.

Thus, by adsorbing the upper surface of the partition 17 with respect to the fluorescent ink, the phosphor ink can be prevented from adhering to the upper surface of the partition when the phosphor ink is applied.

Therefore, when the front panel and the rear panel are laminated and sealed with the sealing glass, the problem that sealing is prevented by the phosphor attached to the upper surface of the partition wall can be solved. In addition, since the water repellent film 110 disappears at the time of firing the phosphor layer, it does not remain in the produced PDP.

Moreover, as a method of reducing the adsorption force with respect to the fluorescent substance ink on the upper surface of the partition 17, the method of reducing the surface roughness of the upper surface of the partition 17 is also mentioned, for example by grinding the upper surface of the partition 17. .

In addition, in this embodiment, although the case where the fluorescent substance is apply | coated by the inkjet method was demonstrated, the method of apply | coating is not limited to this, It can apply also in another method. For example, even when applied by screen printing, the same effect can be obtained when the adsorption force of the phosphor paste on the upper surface of the partition wall is smaller than that of the phosphor paste on the side surface.

(Eleventh embodiment)

Based on the ninth embodiment, the No. PDP was produced using the electrode material ink (Ag ink) of the composition shown in 11, and fluorescent ink.

The partition wall of the back panel was formed using alumina, and a water repellent film made of polytetrafluoroethylene was formed on the upper surface of the partition wall with a pitch of 140 µm, a width of 30 µm, and a height of 120 µm.

The contact angle of the phosphor ink with respect to the side surface of the formed partition was about 5 degrees. The contact angle of the phosphor ink with respect to the water repellent film on the upper surface of the partition wall was about 30 degrees.

The nozzle uses a nozzle having a nozzle diameter of 100 μm, and at the time of scanning, the distance between the tip of the nozzle and the bottom of the recess is set to 100 μm, and the phosphor ink is concave by scanning at a speed of 100 mm / s while pressing at 0.7 kgf / cm ² . The coating was applied to fill about 90% of the negative space volume.

Phosphor ink of each color was apply | coated and dried, and it baked at about 500 degreeC for 10 minutes, and the phosphor layer was formed.

The cross-sectional shape of each formed color phosphor layer was observed by SEM, and it was confirmed that the phosphor layer was formed uniformly at an average thickness of about 20 µm not only on the bottom surface of the recess but also on the side surface.

In general, when such a relatively large nozzle is used, ink easily adheres to the upper part of the partition wall during ink injection, but in this embodiment, the phosphor is not attached to the upper surface of the partition wall. This is considered to be because the ink adhering to the upper surface of the partition wall moved to the partition wall side with drying because the adsorption force of the phosphor ink on the upper surface of the partition wall was smaller than that of the partition wall surface.

As the discharge gas, a neon (Ne) gas containing 5% of quenon (Xe) gas was used, and the sealing pressure was 500 Torr.

The panel luminance was as shown in Table 2, and the wavelength of the ultraviolet ray was the excitation wavelength due to the Xe molecular beam mainly centering on 173 nm.

In the PDP fabrication method of this embodiment, instead of forming a water repellent film on the upper surface of the partition wall, the upper surface of the partition wall is polished to reduce the surface roughness (the surface roughness of the partition side surface is 5 µm, and the surface roughness of the partition upper surface is about 0.5 占 퐉), the phosphor layer could be uniformly applied to the concave portions without attaching the phosphor to the upper surface of the partition wall.

(Embodiment 10)

Although this embodiment is basically the same as that of the fifth embodiment, the outer diameter of the nozzle is set larger than the groove width between the partition walls.

20 is a sectional view showing the outline of the ink application apparatus of the present embodiment. The ink applicator 120 is mixed and stirred in the server 121 so that phosphor ink is put into the server 121 so that precipitation of the phosphor particles does not occur. The phosphor ink in the server 121 is discharged from the nozzle 122 when pressurized by a pressure means not shown.

In addition, the server 121 can scan in the front and back direction of FIG. 20 along the partition 17 on the back glass substrate 15 by a scanning mechanism (not shown).

At the time of scanning, the fluorescent ink 123 discharged from the nozzle 122 is scanned while maintaining the state of crosslinking by the surface tension between the inner surfaces of the grooves between the partition walls of the rear glass substrate 15.

The outer diameter of the nozzle 122 is set so that it is larger than the space | interval of the partition 17, and it does not push out to the adjacent groove | channel. This makes the distance between the partition wall 17 and the nozzle 122 relatively short, so that the phosphor ink easily crosslinks, and the nozzle tip and the top of the partition wall contact during application, depending on the degree of warpage of the back glass substrate 15. Even if the discharge port of the nozzle 12 is not closed.

In order to maintain the crosslinked state of the phosphor ink, the distance between the tip of the nozzle 122 and the partition wall 17 during scanning is preferably set to 1 mm or less.

(Twelfth example)

Based on the tenth embodiment, the No. PDP was produced using the electrode material ink (Ag ink) and fluorescent substance ink of the composition shown in FIG.

The distance between the partition walls 17 is 110 micrometers. The nozzle 122 used the thing of 80 micrometers of inner diameters, and 120 micrometers of outer diameters, The distance of the front end of the nozzle 122 and the top part of the partition 17 at the time of scanning was set to 20 micrometers.

The phosphor ink was placed in the server 121 by combining the viscosity at a shear rate of 200 sec ⁻¹ with 10 to 1000 cm poise. When the pressure was 0.5 kgf / cm ² , the phosphor ink 123 was discharged from the nozzle 122, and the phosphor ink 123 was crosslinked by the surface tension between the distal end portion of the nozzle 122 and the partition wall 17.

In this state, the back glass substrate 15 was moved and scanned at a speed of 50 mm / s, so that the phosphor ink was continuously applied to the grooves between the partition walls.

As the discharge gas, a neon (Ne) gas containing 5% of quenon (Xe) gas was used, and the sealing pressure was 500 Torr.

The panel brightness was as shown in Table 2, and the wavelength of the ultraviolet ray was an excitation wavelength caused by the molecular beam of Xe mainly at 173 nm.

(Embodiment 11)

Although this embodiment is the same as that of Embodiment 5, there exists a difference in the shape of a nozzle tip.

Fig. 21 is a schematic diagram showing main parts of the phosphor ink coating device in the present embodiment.

In the nozzle 24 of Embodiment 5, the opening edge of the front end was parallel to the surface of the back glass substrate 15, whereas the nozzle 124 of this embodiment had the opening edge of the front glass of the back glass substrate 15. It is inclined with respect to the surface.

Similarly to Embodiment 5, even when such a nozzle 124 is used, the ink can be uniformly applied to the grooves in a crosslinked state.

In order to facilitate crosslinking, the distance between the front end of the nozzle 124 and the surface of the rear glass substrate is set to 1 mm or less.

When the tip of the nozzle 124 is scanned in the state inserted in the middle of the groove between the partition walls, the nozzle 124 functions to push out the ink existing in the center portion of the groove, so ink is easily attached to the side surface of the groove.

In addition, since the opening surface of the tip is inclined, the nozzle 124 does not close the discharge port of the nozzle 124 even if the nozzle tip and the back glass substrate contact during application due to the degree of warpage of the back glass substrate 15. It can be applied continuously.

The inclination angle of the opening surface of the nozzle 124 with respect to the surface of the rear glass substrate may be in the range of 10 ° to 90 °.

The nozzle 124 of FIG. 21 has an inclined opening surface, but the nozzle can have the same effect if at least a part of the opening edge is formed in a shape spaced apart from the glass substrate rather than the tip of the opening edge. have.

For example, the following modifications are mentioned.

Like the nozzle 125 shown in Fig. 22, the nozzle tip is opened in a step shape.

As the nozzle 126 shown in FIG. 23 is bent, the opening surface 126a of the tip of the nozzle is inclined with respect to the surface of the back glass substrate 15. As shown in FIG.

Like the nozzle 127 shown in FIG. 24, the opening surface 127a is formed in two directions at the front-end | tip of a nozzle, and each opening surface inclines with respect to the surface 15a, 15b of the back glass substrate 15. As shown in FIG. that. In addition, in FIG. 24, the solid line 15a shows the state in which the surface of the back glass substrate 15 was in contact with the front-end | tip of the nozzle 127, and the dashed-dotted line 15b shows the state in which this was cut off.

Even when the nozzles 125 to 127 are used, the opening surface is not closed when the front end of the nozzle is in contact with the surface of the rear glass substrate 15. Therefore, the nozzle may be scanned while contacting the surface of the rear glass substrate 15. It is possible to perform continuous ink application stably.

(Example 13)

Based on the eleventh embodiment, the No. PDP was produced using the electrode material ink (Ag ink) and fluorescent substance ink of the composition shown in 13.

The distance between the partition walls 17 is 110 μm, the inner diameter of the nozzle 124 is 60 μm, the outer diameter is 100 μm, and the inclination of the opening surface of the nozzle 124 with respect to the surface of the back glass substrate is 45 °, The distance between the front end and the surface of the back glass substrate 15 was set to 20 µm.

Thereby, the phosphor ink could be continuously and stably applied to the grooves between the partition walls.

As the discharge glass, a neon (Ne) gas containing 5% of quenon (Xe) gas was used, and the sealing pressure was 500 Torr.

The panel brightness was as shown in Table 2, and the wavelength of ultraviolet-ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

(Twelfth Embodiment)

25 is a schematic sectional view of a PDP according to the present embodiment. The configuration and manufacturing method of the PDP is the same as that of the PDP of the first embodiment (see FIG. 2), but the reflective layer 130 is disposed in the groove between the partition walls 17, and the phosphor layer 18 is disposed on the reflective layer 130. It is arranged. By arranging the reflective layer 130 in this way, the luminance of the panel can be improved (10 to 20%).

Formation of the reflective layer 130 and the phosphor layer 18 are formed by applying the reflector ink and the phosphor ink using an ink coating device as shown in Fig. 4 of the first embodiment.

The reflector ink is a combination of a reflecting material, a binder, and a solvent component. As the reflecting material, a white powder having a high reflectance such as titanium oxide or alumina can be used. In particular, a titanium oxide having an average particle diameter of 5 µm or less is preferable.

In the method of forming the reflective layer of this embodiment, the method of forming the phosphor layers described in Embodiments 7 and 8 is applied to the formation of the reflective layer 130, so that the adsorption force to the reflector ink on the side surface of the partition 17 is reduced. Is larger than the adsorption force on the reflector ink.

That is, the material of the partition is selected so that the contact angle of the reflector ink with respect to the side of the partition 17 is smaller than the contact angle of the reflector ink with respect to the bottom of the recess, or the surface roughness of the side of the partition 17 is larger than the surface roughness of the bottom of the recess. do. As a result, as described above with reference to FIG. 18A, the reflector ink easily adheres to the side surface of the partition wall 17, thereby contributing to the improvement of the luminance of the PDP.

Reflective material ink is preferably an other terpineol (C ₁₀ H ₁₈ O) Woods with ethyl cellulose 0.1 to 10% by weight in terms of use, as a binder, and solvent in order to make it easier to adhere to the concave portion side surface (170b).

Moreover, besides this, organic solvents, such as diethylene glycol methyl ether, and water are mentioned as a preferable solvent, Polymers, such as PMMA and polyvinyl argon, are mentioned as a binder.

In order to make the thickness of a reflective layer uniform, it is preferable that ink viscosity is low (1-1000 centipoise at 25 degreeC).

In addition, in order to attach a large amount of reflector ink to the side surface 170b of the recess 170, the filling amount of the reflector ink into the recess 170 is set to be 80% or more of the space volume of the recess 170, and the reflector ink It is preferable to set content of the reflective material in 20 to 60weight% of a range.

Table 3 lists the composition of the electrode material ink (Ag ink), the reflector ink, the phosphor ink, the ink viscosity, and the luminance measurement results of the panel used in Examples 14 to 17 below.

Also in Examples 14 to 17, BaMgAl ₁₀ O ₁₇ : Eu ²⁺ as a blue phosphor, Zn ₂ SiO ₄ : Mn as a green phosphor, and (Y _x Gd _1-x ) BO ₃ : Eu ³⁺ were used as a red phosphor. .

(Example 14)

PDP was produced using the electrode material ink (Ag ink), the reflector ink, and the fluorescent ink of the composition shown in the said No. 14 of Table 3 based on 12th Embodiment.

The partition was formed of a mixture of alumina and glass, and had a pitch of 140 µm, a width of 30 µm, and a height of 120 µm.

The reflector ink uses 45 weight% of titanium oxide having an average particle diameter of 3 µm as a reflecting material, 1.8 weight% of ethyl cellulose as a binder, and 53.2 weight% of tapineol as a solvent, and the viscosity is 50 cm at 25 ° C. Adjusted to Az.

The contact angle with respect to the partition of the reflector ink was about 8 degrees. In addition, the contact angle with respect to the bottom surface (back glass substrate 15) of the recessed part was about 13 degrees.

The distance between the nozzle front end and the back glass substrate 15 at the time of scanning was set to 100 micrometers using what nozzle diameter is 80 micrometers.

When pressurized at 0.5 kgf / cm <2>, the reflector ink was discharged from a nozzle and bridge | crosslinking was formed. In this state, by scanning the rear glass substrate in the direction of the partition wall, ink was continuously injected into the grooves between the partition walls, and the reflector ink was applied so as to fill about 90% of the space volume of the recess.

The applied reflector ink was dried and then baked at about 500 ° C. for 10 minutes to form a reflective layer.

SEM observation of the cross-sectional application shape of the formed reflective layer confirmed that the reflective material was uniformly coated with a thickness of about 20 μm not only on the bottom surface of the groove but also on the partition wall side.

Then, phosphor ink was applied on the reflective layer in the same manner as this to form a phosphor layer. The discharge gas was made into 500 Torr of sealing pressure using the neon (Ne) gas containing 5% of xenon (Xe) gas.

The panel brightness was as shown in Table 3, and the wavelength of the ultraviolet ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

In addition, in this embodiment, although the contact angle with respect to the partition of reflector ink is adjusted, it uses the thing which formed the glass partition of about 5 micrometers with respect to the back glass substrate 15 whose surface roughness is about 0.5 micrometers. Thus, even in the case where the reflector ink was applied to the grooves between the partition walls, a uniform reflective layer having a thickness of 20 µm could be formed on the side surfaces of the partition walls.

(Embodiment 13)

The structure of the PDP of this embodiment is also the same as that of the PDP of Embodiment 12, and the reflection layer 130 is arrange | positioned (refer FIG. 25). In addition, the manufacturing method is basically the same as the method described in the twelfth embodiment. However, in this embodiment, the adsorption property of the upper surface of the partition 17 to the reflector ink is different from that of the reflector ink of the side surface of the partition 17. .

Adjusting the adsorption property to the reflector ink is formed by forming a water repellent film 110 made of a water repellent material on the upper surface of the partition wall 17 as shown in FIG. This can be achieved by increasing the contact angle with respect to the upper surface of the partition wall.

Alternatively, the surface roughness of the partition upper surface may be smaller than the surface roughness of the partition side surface.

In this way, when the reflector ink is applied, the reflector ink is hardly adhered to the upper surface of the partition wall. For example, the reflector ink hardly remains on the upper surface of the partition wall even when the reflector ink is adhered.

Therefore, when the front panel and the back panel are pulled and sealed by the sealing glass, the sealing problem is prevented by the reflective material attached to the partition wall surface.

(Example 15)

Based on Embodiment 13, the PDP was produced using the electrode material ink (Ag ink), the reflector ink, and the fluorescent substance ink of the composition shown in the said No.15 of Table 3.

The partition wall was formed of alumina and had a pitch of 140 µm, a width of 30 µm, and a height of 120 µm. On the partition surface, a water repellent film made of polytetrafluoroethylene was formed.

The reflector ink uses 45% by weight of alumina (A1 ₂ O ₃ ) having a particle diameter of 0.5 μm as a reflecting material, 1.0% by weight of polyvinyl alcohol as a binder, and 54% by weight of water as a solvent. The viscosity is 100 cm at 25 ° C. Adjusted to poise.

The contact angle with respect to the side wall of a reflector ink was about 5 degrees, and the contact angle with respect to the partition wall top of a reflector ink was about 30 degrees.

The nozzle diameter was 100 micrometers, and the distance of the nozzle tip and a partition at the time of scanning was set to 100 micrometers.

When pressurized to 0.7 kgf / cm <2> by the pressurizer, the reflector ink was discharged from the nozzle and bridge | crosslinked. In this state, the back panel substrate was scanned in the direction along the partition at a rate of 100 mm / s, so that the reflector ink was continuously injected into the grooves between the partition walls, and the reflector ink was applied so as to fill about 90% of the volume of the groove.

The applied reflector ink was dried and then baked at about 500 ° C. for 10 minutes to form a reflective layer.

When such a relatively large nozzle is used, ink is usually left on the partition wall during ink injection. However, after forming the reflective layer by the method of the present embodiment, the cross-sectional coating shape was observed by SEM. It was confirmed that it was uniformly applied to the inner surface of the groove with a thickness of about 20 μm without sticking to it.

On the reflective layer, a phosphor layer was formed in the same manner as in Example 10.

The discharge gas was made into 500 Torr of sealing pressure using the neon (Ne) gas containing 5% of xenon (Xe) gas.

The panel brightness was as shown in Table 3, and the wavelength of the ultraviolet ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

In this embodiment, the contact angle of the reflector ink with respect to the partition wall is adjusted to be small. However, the surface roughness of the side surface of the glass partition wall is about 5 µm, and the surface roughness of the upper surface of the glass partition wall is about 0.5 µm, and the grooves between the partition walls are formed. Similarly to this, even when the reflective ink was applied, a uniform reflective layer having a thickness of 20 µm could be formed on the side surface of the partition wall.

(Embodiment 14)

The structure of the PDP of this embodiment is the same as that of the PDP of Embodiment 12, and the reflection layer 130 is arrange | positioned (refer FIG. 25).

Formation of the reflecting layer 130 and the phosphor layer 18 are formed by applying the reflector ink and the phosphor ink using the ink applying apparatus as shown in Fig. 4 of the first embodiment.

In this embodiment, the method of forming the phosphor layer described in Embodiment 5 is applied to the formation of the reflective layer 130, and the coating is continuously applied between the partition walls by scanning the nozzle in a state where the reflector ink is crosslinked by surface tension. This is then dried and baked to form the reflective layer 130.

In order to maintain the bridge | crosslinking state of a reflector ink, it is preferable to set the distance of the front-end | tip of a nozzle and the partition 17 at the time of scanning in the range of 0 micrometer-1 mm.

According to this reflective layer forming method, the same effects as those described in the fifth embodiment, that is, the reflector ink can be uniformly applied by an inexpensive ink application device, and the effect of using a reflector ink of a wide range of viscosity and surface tension can be obtained.

Next, on the reflection layer 130 thus formed, the phosphor ink is applied in the same manner as in the fifth embodiment to form the phosphor layer 18.

The reflective layer 130 can also be formed by applying the method described in Embodiments 6, 10, and 11 using the above-mentioned reflector ink, and obtains the same effect as this.

(Example 16)

Based on Embodiment l4, the PDP was produced using the electrode material ink (Ag ink) of the composition shown to No. 16 of Table 3, a reflector ink, and a fluorescent ink.

The distance between partitions was 110 micrometers, and the nozzle used the thing of 80 micrometers of inner diameters, and 120 micrometers of outer diameters, and the distance between the front end of a nozzle and the top of a partition is set to 20 micrometers.

The reflector ink uses 30 to 60% by weight of titanium oxide having an average particle diameter of 0.5 to 5 μm as a reflective material, 0.1 to 10% by weight of ethyl cellulose as a binder, and 30 to 60% by weight of tapineol as a solvent. Was adjusted to 10-1 000 centipoise at 25 ° C.

When pressurized at 0.5 kgf / cm <2> by the pressurizer, the reflector ink was discharged from the nozzle and the reflector ink was bridge | crosslinked by surface tension between the front-end | tip part of a nozzle and the side surface of the partition 17.

In this state, the back glass substrate 15 was moved and scanned at a speed of 50 mm / s, so that the reflector ink could be continuously applied to the grooves between the partition walls.

After drying, the reflective layer could be formed by firing at about 500 ° C. for 10 minutes.

A phosphor layer was formed on the reflective layer in the same manner as in the tenth embodiment.

As the discharge gas, a neon gas containing 5% xenon (Xe) gas was used, and the sealing pressure was 500 Torr.

The panel brightness was as shown in Table 3, and the wavelength of the ultraviolet ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

(Example 17)

Based on Embodiment 14, the PDP was produced using the electrode material ink (Ag ink), the reflector ink, and fluorescent substance ink of the composition shown in No. 17 of the said Table 3.

The reflector ink used was the same as in the sixteenth embodiment, but was applied using the nozzle 124 (see Fig. 21) formed with the same inclined aperture as in the thirteenth embodiment.

That is, the distance between the partition walls 17 is 110 μm, the inner diameter of the nozzle l24 is 60 μm, the outer diameter is 100 μm, and the inclination of the opening surface of the nozzle 124 with respect to the surface of the back glass substrate is 45 °, and the nozzle ( The distance between the front-end | tip of 124 and the surface of the back glass substrate 15 was set to 20 micrometers. Thereby, the reflector ink was able to be apply | coated continuously to the groove | channel between partition walls stably.

A phosphor layer was formed on the reflective layer in the same manner as in the tenth embodiment. The discharge gas was made into 500 Torr of sealing pressure using the neon (Ne) gas containing 5% of xenon (Xe) gas.

The panel brightness was as shown in Table 3, and the wavelength of ultraviolet-ray was an excitation wavelength by the molecular beam of Xe mainly centering on 173 nm.

( etc )

In addition, although the above-mentioned Embodiments 1-14 described the AC type PDP as an example, it is not limited to AC type, It can implement also similarly in the PDP in which a partition is arrange | positioned in stripe shape.

Further, as in Embodiment 7, 8, 9, 12, and 13, the technique of adjusting the adhesion state of the ink by adjusting the adsorption force of the partition wall and the bottom surface of the concave portion with respect to the phosphor ink or the reflector ink is characterized in that the partition wall is arranged in a well sperm shape. The same effect can be applied to a DC-type PDP.

As described above, according to the present invention, a precise phosphor layer or a reflective layer can be easily formed even in the case of a fine cell structure. In the case where the partition wall has a stripe shape, the phosphor layer and the reflection layer can be formed uniformly in the grooves between the partition walls, and the phosphor layer and the reflection layer can be easily formed on the side surfaces of the partition wall.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, substitutions and additions through the spirit and scope of the present invention as set forth in the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a form in which a phosphor paste is applied to a recess between partition walls by a conventional screen printing method.

2 is a schematic cross-sectional view of an AC plane radial PDP according to a first embodiment of the present invention.

3 is a schematic driving block diagram of a PDP according to a first embodiment of the present invention;

4 is a schematic configuration diagram of an ink application apparatus used when forming a discharge electrode, an address electrode, and a phosphor layer in the first embodiment;

5 is a perspective view showing a filling operation using an example of the ink applying apparatus;

6 is a schematic configuration diagram of an ink application apparatus used when forming a phosphor layer in the second embodiment;

FIG. 7 is a partially enlarged perspective view showing the operation of the ink application device of FIG.

8A and 8B are views for explaining the effect of the method of applying the phosphor ink in the second embodiment.

9 is a view for explaining a method of applying phosphor ink in a third embodiment;

10 (a) and 10 (b) are diagrams explaining a coating method of the phosphor ink in the third embodiment;

Fig. 11 is a view for explaining a method of applying phosphor ink in the fourth embodiment.

Fig. 12 is a schematic cross sectional view showing the application form of the phosphor ink in the fifth embodiment;

Figure l3 shows an example of the crosslinking method of the ink in the fifth embodiment

Fig. 14 shows the application form of the phosphor ink in the sixth embodiment.

(A)-(f) is explanatory drawing of the formation method of the partition by the thermal spraying method.

16 is an explanatory diagram of plasma spraying;

17 is a schematic configuration diagram of an ink applying apparatus according to a seventh embodiment

FIG. 18A is a schematic diagram showing a drying process of the phosphor ink filled in the recesses in the manufacturing method of the eighth embodiment, and FIG. 18B is a comparison diagram.

Fig. 19 shows the form of phosphor ink application in the ninth embodiment.

20 is a sectional view showing an outline of an ink application apparatus of a tenth embodiment.

Fig. 21 is a main schematic view of a phosphor ink applying apparatus in the eleventh embodiment

22 to 24 show a modification of the nozzle in the eleventh embodiment

25 is a schematic sectional view of a PDP according to a twelfth embodiment

Explanation of symbols on main parts of drawing

11 front glass substrate 12 discharge electrode

13: dielectric glass layer 14: protective layer

15 back glass substrate 16 address electrode

17 partition 18 phosphor layer

19: discharge space 20, 100: ink coating device

21: server 22: pressure pump

23, 33, 43, 103: header 24, 34, 44: nozzle

35 phosphor ink 36 air jet nozzle

90: plasma spraying device

Claims (119)

(delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) (delete) For the first plate in which the partitions are arranged in a stripe shape, the nozzles are scanned along the partition walls while the grooves between the partition walls and the nozzles are cross-linked by the surface tension of the phosphor ink, thereby applying the phosphor ink to the grooves to apply the fluorescent material. A phosphor layer forming step of forming a layer, And a sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is disposed. The method of claim 15, The nozzle used in the phosphor layer forming step, the outer diameter of the tip portion is larger than the width of the grooves between the partition wall manufacturing method of the PDP. The method of claim 16, In the phosphor layer forming step, the nozzle is scanned while maintaining the distance between the tip of the nozzle and the top of the partition wall to 1 mm or less. The method of claim 15, The nozzle used in the phosphor layer forming step is characterized in that the outer diameter of the tip portion is smaller than the width of the groove, and the nozzle is scanned with the nozzle tip inserted into the groove. The method of claim 18, In the phosphor layer forming step, the nozzle is scanned while maintaining the tip of the nozzle and the bottom of the groove in a non-contact state. The method of claim 19, In the phosphor layer forming step, the nozzle is scanned while maintaining a distance between the tip of the nozzle and the bottom of the groove at 5 µm to 1 mm. The method of claim 15, The nozzle used in the phosphor layer forming step has an outer diameter of the tip portion smaller than the width of the groove, and in the nozzle, at least a part of the opening edge discharging ink is spaced apart from the glass substrate than the tip of the opening edge end. It is a shape, The manufacturing method of PDP characterized by the above-mentioned. The method of claim 21, The nozzle used in the phosphor layer forming step, wherein the opening surface for discharging ink is formed inclined with respect to the surface of the first plate. The method of claim 22, The nozzle used in the phosphor layer forming step is characterized in that the opening surface for discharging ink is inclined at an angle of 10 ° or more and less than 90 ° with respect to the surface of the first plate. The method of claim 21, In the phosphor layer forming step, the nozzle is scanned while maintaining the distance between the tip of the nozzle and the bottom of the groove at 1 mm or less. The method of claim 15, The phosphor layer forming step includes a sub-step of crosslinking the first plate and the nozzle with the surface tension of the phosphor ink while the nozzle is stopped with respect to the first plate. The method of claim 15, The phosphor layer forming step includes a substep of crosslinking the first plate and the nozzle with the surface tension of the phosphor ink in a state in which the nozzle is closer to the first plate than in scanning. The method of claim 15, The forming of the phosphor layer may include a sub-step of attaching the phosphor ink to an end of the first plate and crosslinking the first plate and the nozzle with the surface tension of the phosphor ink by contacting the nozzle with the attached phosphor ink. PDP manufacturing method. The method of claim 15, The phosphor ink used in the phosphor layer forming step includes a phosphor having an average particle diameter of 0.5 µm to 5.0 µm, and a viscosity at 25 ° C. of 10 to 1000 cps. The method of claim 15, The nozzle used in the phosphor layer forming step has a diameter of 45 to 150 µm. The method of claim 15, In the phosphor layer forming step, a method of manufacturing a PDP, characterized in that scanning is performed while discharging phosphor ink in parallel to a plurality of grooves from a plurality of nozzles. The method of claim 15, In the phosphor layer forming step, a method of manufacturing a PDP, characterized by scanning while discharging a plurality of phosphor inks in parallel with a plurality of grooves from a plurality of nozzles. (Twice) A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A phosphor layer forming step of forming a phosphor layer by applying a phosphor ink to a recess of the first plate; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method for producing a PDP, wherein a side surface of the first plate prepared in the plate preparing step has a larger suction force to the phosphor ink than the bottom of the concave portion. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A phosphor layer forming step of forming a phosphor layer by applying a phosphor ink to a recess of the first plate; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method for producing a PDP, wherein the first plate produced in the plate preparing step has a smaller contact angle with respect to the side of the recess than the contact angle with respect to the bottom of the recess of the phosphor ink. The method of claim 33, wherein And the plate preparing step includes a film forming substep of forming a film on the bottom surface of the concave portion that reduces the adsorption force on the phosphor ink. The method of claim 33, wherein In the plate preparation step, a first plate is prepared so that the contact angle of the phosphor ink with respect to the side surface of the recess is 90 degrees or less. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A phosphor layer forming step of forming a phosphor layer by applying a phosphor ink to a recess of the first plate; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method of manufacturing a PDP, wherein the first plate created in the plate preparation step has a larger surface roughness than the bottom of the concave portion. The method of claim 32, In the phosphor layer forming step, the phosphor ink is applied so that at least 80% of the recess is filled. The method of claim 32, In the phosphor layer forming step, a phosphor layer is formed by discharging phosphor ink from a nozzle and applying it to the concave portion. The method of claim 38, The phosphor ink used in the phosphor layer forming step has a viscosity of 1 to 1000 cps at a shear rate of 200 sec-1 at 25 ° C. The method of claim 38, The phosphor ink used in the phosphor layer forming step has a phosphor content of 20 to 60% by weight. The method of claim 38, The phosphor contained in the phosphor ink used in the phosphor layer forming step has a mean particle size of 0.5 µm to 5.0 µm. The method of claim 38, The phosphor ink used in the phosphor layer forming step is composed of tapineol, phosphor powder, and ethyl cellulose, and the production of PDP characterized in that the content of ethyl cellulose in the phosphor ink is 0.1 to 10% by weight. Way. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A phosphor layer forming step of forming a phosphor layer by applying a phosphor ink to a recess of the first plate; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method of manufacturing a PDP, wherein the first plate to be prepared in the plate preparing step has a larger suction force on the phosphor ink than the upper surface of the partition wall. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A phosphor layer forming step of forming a phosphor layer by applying a phosphor ink to a recess of the first plate; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method for producing a PDP, wherein the first plate prepared in the plate preparing step has a smaller contact angle with respect to the side wall of the phosphor than a contact angle with respect to the upper surface of the partition wall of the phosphor ink. The method of claim 44, The plate preparation step includes a sub-step of applying a material on the upper part of the partition wall, wherein the contact angle of the phosphor ink is larger than the contact angle with respect to the side surface of the partition wall. The method of claim 44, In the plate preparing step, a first plate is prepared so that the contact angle of the phosphor ink with respect to the side surface of the partition wall is 90 degrees or less. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A phosphor layer forming step of forming a phosphor layer by applying a phosphor ink to a recess of the first plate; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method of manufacturing a PDP, wherein the first plate to be prepared in the plate preparation step has a larger surface roughness than a partition upper surface. (correction) A reflective layer forming step of forming a reflective layer by coating the nozzle along the partition wall while injecting the reflector ink into the grooves between the partition walls so that the partition wall has a continuous flow from the nozzle with respect to the first plate arranged in a stripe shape; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; And a sealing step of sealing the gas medium while overlapping and sealing the second plate on the side on which the partition wall of the first plate is disposed. The reflecting layer is applied by applying the reflector ink to the grooves by scanning the nozzles along the partition walls while maintaining the grooves between the partition walls and the nozzles crosslinking with the surface tension of the reflector ink with respect to the first plate having the partitions arranged in a stripe shape. Forming a reflective layer, Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; And a sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is disposed. The method of claim 49, The nozzle used in the reflective layer forming step, the outer diameter of the tip portion of the manufacturing method of the PDP, characterized in that larger than the width of the groove between the partition wall. 51. The method of claim 50 wherein In the reflective layer forming step, the nozzle is scanned while maintaining the distance between the tip of the nozzle and the top of the partition wall at 1 mm or less. The method of claim 49, The nozzle used in the reflective layer forming step, wherein the outer diameter of the tip portion is smaller than the width of the groove, the nozzle is scanned while the nozzle tip is inserted into the groove. The method of claim 52, wherein In the reflective layer forming step, the nozzle is scanned while maintaining the tip of the nozzle and the bottom of the groove in a non-contact state. The method of claim 53, wherein In the reflective layer forming step, the nozzle is scanned while maintaining a distance between the tip of the nozzle and the bottom of the groove at 5 µm to 1 mm. The method of claim 49, The nozzle used in the reflective layer forming step, the outer diameter of the tip portion is smaller than the width of the groove, The method for producing a PDP, wherein the nozzle has a shape in which at least a part of the opening edge end for discharging ink is spaced apart from the glass substrate than the tip of the opening edge end. The method of claim 55, The nozzle used in the reflective layer forming step, wherein the opening surface for discharging ink is formed inclined with respect to the surface of the first plate. The method of claim 56, wherein The nozzle used in the reflective layer forming step is characterized in that the opening surface for discharging ink is inclined at an angle of 10 degrees or more and less than 90 degrees with respect to the surface of the first plate. The method of claim 45, In the reflective layer forming step, the nozzle is scanned while maintaining the distance between the tip of the nozzle and the bottom of the groove at 1 mm or less. The method of claim 49, The forming of the reflective layer includes a sub-step of crosslinking the first plate and the nozzle with the surface tension of the reflector ink while the nozzle is stopped with respect to the first plate. The method of claim 49, The reflective layer forming step includes a substep of crosslinking the first plate and the nozzle with the surface tension of the reflector ink in a state where the nozzle is closer to the first plate than in scanning. The method of claim 49, The forming of the reflective layer includes a substep of attaching the reflector ink to the end of the first plate and crosslinking the first plate and the nozzle with the surface tension of the reflector ink by contacting the nozzle with the attached reflector ink. PDP manufacturing method. The method of claim 49, The reflective ink used in the reflective layer forming step includes a reflective material having an average particle diameter of 0.5 μm to 5.0 μm, and has a viscosity at 25 ° C. of 10 to 1000 centipoise. The method of claim 49, In the reflective layer forming step, the method of manufacturing a PDP, characterized in that scanning while discharging the reflector ink in parallel with respect to the plurality of grooves from the plurality of nozzles. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A reflective layer forming step of forming a reflective layer by applying a reflective ink to a recess of the first plate; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The side plate of the 1st plate created by the said plate preparation step has larger adsorption force with respect to a reflector ink than the bottom face of the said recessed part, The manufacturing method of the PDP. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A reflective layer forming step of forming a reflective layer by applying a reflective ink to a recess of the first plate; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method for producing a PDP, wherein the first plate created in the plate preparing step is smaller in contact angle with respect to the side of the recess than the contact angle with respect to the bottom of the recess of the reflector ink. 66. The method of claim 65, In the plate preparation step, a first plate is prepared so that the contact angle of the reflector ink with respect to the side surface of the recess is 90 degrees or less. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A reflective layer forming step of forming a reflective layer by applying a reflective ink to a recess of the first plate; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method for producing a PDP, wherein the first plate prepared in the plate preparing step has a larger surface roughness than a bottom surface of the recess. The method of claim 64, wherein In the reflective layer forming step, the reflective material ink is applied so that 80% or more of the concave portion is filled. The method of claim 64, wherein The reflector ink used in the reflective layer forming step is a method for producing a PDP, wherein the reflector ink is titanium oxide. The method of claim 64, wherein In the reflective layer forming step, a reflective layer is formed by discharging reflective ink from a nozzle and applying it to the recessed portion. The method of claim 70, The reflective ink used in the reflective layer forming step has a viscosity at 25 ° C. of 1 to 1000 cps. The method of claim 70, The reflector ink used in the reflective layer forming step, the content of the reflector is 20 to 60% by weight of the manufacturing method of the PDP. The method of claim 70, The reflector included in the reflector ink used in the phosphor layer forming step has a mean particle size of 0.5 µm to 5.0 µm. The method of claim 70, The reflector ink used in the reflective layer forming step is composed of tapineol, reflector and ethyl cellulose, and the content of ethyl cellulose in the reflector ink is 0.1 to 10% by weight. Manufacturing method. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A reflective layer forming step of forming a reflective layer by applying a reflective ink to a recess of the first plate; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method of manufacturing a PDP, wherein the first plate created in the plate preparation step has a larger suction force on the reflector ink than the upper surface of the partition wall. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A reflective layer forming step of forming a reflective layer by applying a reflective ink to a recess of the first plate; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method for producing a PDP, wherein the first plate to be prepared in the plate preparation step has a smaller contact angle with respect to the side wall of the partition than the contact angle with respect to the upper surface of the partition wall of the reflector ink. 77. The method of claim 76, The plate preparation step includes a sub-step of applying a material on the upper portion of the partition wall whose contact angle of the reflector ink is larger than the contact angle with respect to the side surface of the partition wall. 77. The method of claim 76, In the plate preparation step, a first plate is prepared so that the contact angle of the reflector ink with respect to the side surface of said partition is 90 degrees or less. A plate creation step of creating a first plate having a recess formed between the partition wall and the partition wall, A reflective layer forming step of forming a reflective layer by applying a reflective ink to a recess of the first plate; Forming a phosphor layer on the reflective layer by applying phosphor ink to grooves between the partition walls; A sealing step of sealing a gas medium at the same time as overlapping and sealing the second plate on the side where the partition wall of the first plate is formed, The method of manufacturing a PDP, wherein the first plate to be prepared in the plate preparation step has a larger surface roughness than a top surface of the partition wall. An electrode forming step of arranging the electrodes in a stripe shape by scanning the nozzles while discharging the electrode material ink containing the electrode material on the surface of the first plate so as to be in a continuous flow from the nozzles; And a sealing step of sealing the gas medium at the same time as overlapping and sealing the second plate on the side where the electrode of the first plate is disposed. 81. The method of claim 80, The viscosity of the electrode material ink used in the electrode forming step is a method of producing a PDP, characterized in that 100 ~ 100cp in 25 ℃. (delete) (delete) (delete) (delete) (correction) A partition layer is formed in a stripe shape, and the phosphor layer formed by applying the phosphor ink by scanning the nozzle along the partition wall while discharging the nozzle ink along the partition wall while discharging the nozzle ink along the partition wall in a state where the phosphor ink is crosslinked in the grooves between the partition walls is formed. With 1 plate, And a second plate which is sealed in a state where the gas medium is enclosed by overlapping the partition wall of the first plate. A first plate having a recess formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying a phosphor ink to the recess, and a side surface of the recess is formed with a larger suction force against the phosphor ink than the bottom of the recess; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A first plate having a recess formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying phosphor ink to the recess, and a contact angle with respect to the side surface of the recess is smaller than the contact angle with respect to the bottom of the recess of the phosphor ink. Wow, And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A first plate having a recess formed between the partition wall and the partition wall, the phosphor layer being formed by applying a phosphor ink to the recess, and having a larger surface roughness on the side than the bottom of the recess; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A first plate having a recess formed between the barrier ribs and the barrier ribs, the phosphor layer being formed by applying the phosphor ink to the recess, and having a greater side suction force on the phosphor ink than the upper surface of the barrier rib; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A first plate having a concave portion formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying phosphor ink to the concave portion, and a contact angle with respect to the side surface of the partition wall is smaller than the contact angle with respect to the upper surface of the partition wall of the phosphor ink; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A first plate having a concave portion formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying a phosphor ink to the concave portion, and the surface roughness of which is greater on the side surface than the upper surface of the partition wall; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. (correction) A partition layer is arranged in a stripe shape, and a reflective layer is formed by applying the reflector ink by scanning the nozzle along the partition wall while discharging a continuous flow from the nozzle while discharging the reflector ink into a groove between the partition walls. A first plate on which a phosphor layer is formed by applying a phosphor ink thereon; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A recess is formed between the partition and the partition, the reflecting layer is formed by applying a reflector ink on the recess, and a phosphor layer is formed by applying the phosphor ink thereon, and the reflector ink is formed on the side of the recess than the bottom of the recess. A first plate having a large adsorption force to And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A recess is formed between the partition and the partition, and a reflective layer is formed by applying a reflector ink to the recess, and a phosphor layer is formed by applying a phosphor ink thereon, and the contact angle with respect to the bottom of the recess of the reflector ink is formed. A first plate having a small contact angle with respect to the side of the recess; And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A recess is formed between the partition and the partition, and a reflective layer is formed by applying a reflector ink to the recess, and a phosphor layer is formed by applying a phosphor ink thereon, and the surface roughness of the side is lower than that of the bottom of the recess. A large first plate, And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A recess is formed between the partition and the partition, and a reflective layer is formed on the recess by applying a reflector ink, and a phosphor layer is formed by applying a phosphor ink thereon, and a side of the partition is formed on the reflector ink. A first plate having a large adsorption force for And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A recess is formed between the partition and the partition, and the recess is formed by applying a reflector ink, and a phosphor layer is formed by applying a phosphor ink thereon, and the barrier is larger than the contact angle with respect to the upper surface of the partition wall of the reflector ink. A first plate having a small contact angle with respect to the side surface, And a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed therein. A recess is formed between the partition and the partition, and a reflecting layer is formed by applying a reflector ink to the recess, and a phosphor layer is formed by applying a phosphor ink thereon, and the surface has a larger surface roughness than the upper surface of the partition. And a second plate formed on the side of which the partition wall of the first plate is disposed, and a second plate which is sealed in a state where the gas medium is sealed. (correction) A first plate in which the electrodes are arranged in a stripe shape by scanning the nozzles while discharging electrode material ink containing electrode materials on the surface so as to be a continuous flow from the nozzles; And a second plate which is superposed on the side where the electrodes of the first plate are disposed and sealed in a state where the gas medium is sealed. (correction) A first plate in which the partition wall is arranged in a stripe shape, and a phosphor layer formed by applying the phosphor ink by scanning the nozzle along the partition wall while discharging the phosphor ink into the grooves between the partition walls so as to be a continuous flow; A PDP including a second plate overlapped with the partition wall of the first plate and sealed in a state where the gas medium is sealed; And a driving circuit for driving the PDP. (correction) 102. The method of claim 101, wherein The partition plate is arranged in a stripe shape on the first plate, and the phosphor ink is scanned along the partition wall while the phosphor ink is discharged from the nozzle so that the nozzle is directed toward the side surface of the partition wall so as to flow continuously. A phosphor layer formed by coating a film is formed. (correction) 102. The method of claim 101, wherein In the first plate, the partition wall is arranged in a stripe shape, the phosphor ink is applied by scanning the nozzle along the partition wall while discharging the phosphor ink into the grooves between the partition walls so as to be a continuous flow from the nozzle, and the applied phosphor ink is further applied. A phosphor layer is formed by applying an external force to the side of a partition to form a phosphor layer. 102. The method of claim 101, wherein The phosphor layer includes a phosphor having an average particle diameter of 0.5 µm to 5.0 µm and silica having an average particle diameter of 0.01 to 0.02 µm. (correction) A partition layer is formed in a stripe shape, and the phosphor layer formed by applying the phosphor ink by scanning the nozzle along the partition wall while discharging the nozzle ink along the partition wall while discharging the nozzle ink along the partition wall in a state where the phosphor ink is crosslinked in the grooves between the partition walls is formed. With 1 plate, A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A first plate having a recess formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying a phosphor ink to the recess, and a side surface of the recess is formed with a larger suction force against the phosphor ink than the bottom of the recess; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A first plate having a recess formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying phosphor ink to the recess, and a contact angle with respect to the side of the recess is smaller than the contact angle with respect to the bottom of the recess of the phosphor ink. Wow, A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A first plate having a recess formed between the partition wall and the partition wall, the phosphor layer being formed by applying a phosphor ink to the recess, and having a larger surface roughness on the side than the bottom of the recess; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A first plate having a recess formed between the barrier ribs and the barrier ribs, the phosphor layer being formed by applying the phosphor ink to the recess, and having a greater side suction force on the phosphor ink than the upper surface of the barrier rib; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A first plate having a concave portion formed between the partition wall and the partition wall, wherein a phosphor layer is formed by applying phosphor ink to the concave portion, and a contact angle with respect to the side surface of the partition wall is smaller than the contact angle with respect to the upper surface of the partition wall of the phosphor ink; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A first plate having a concave portion formed between the partition wall and the partition wall, the phosphor layer being formed by applying phosphor ink to the concave portion, and having a larger surface roughness on the side surface than the upper surface of the partition wall; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. (correction) A partition layer is arranged in a stripe shape, and a reflective layer formed by applying the reflector ink by scanning the nozzle along the partition wall while discharging the continuous ink from the nozzle while discharging the reflector ink in the grooves between the partition walls is formed. A first plate on which a phosphor layer is formed by applying a phosphor ink thereon; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A recess is formed between the partition and the partition, and a reflective layer is formed by applying the reflective ink to the recess, and a phosphor layer is formed by applying the fluorescent ink thereon, and the side surface is formed on the reflective ink more than the bottom of the recess. A first plate having a large adsorption force for A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A recess is formed between the partition and the partition, and a reflecting layer is formed by applying a reflector ink to the recess, and a phosphor layer is formed by applying a phosphor ink thereon, and the reflector ink is formed on the bottom of the recess. A first plate having a smaller contact angle with respect to the side of the recess than the contact angle A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A recess is formed between the partition and the partition, and a reflective layer is formed on the recess by applying a reflector ink, and a phosphor layer is formed on the recess by applying a phosphor ink thereon, and the surface is rougher than the bottom of the recess. The first plate is formed large, A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A concave portion is formed between the partition wall and the partition wall, and a reflective layer is formed by applying a reflector ink to the concave portion, and a phosphor layer is formed by applying a phosphor ink thereon, and a reflector is formed on the side surface of the partition wall from the upper surface of the partition wall. A first plate having a large adsorption force to ink; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A recess is formed between the partition and the partition, and the recess is formed by applying a reflector ink, and a phosphor layer is formed by applying a phosphor ink thereon, and the barrier is larger than the contact angle with respect to the upper surface of the partition wall of the reflector ink. A first plate having a small contact angle with respect to the side surface, A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. A recess is formed between the partition and the partition, and a reflecting layer is formed by applying a reflector ink to the recess, and a phosphor layer is formed by applying a phosphor ink thereon, and the surface has a larger surface roughness than the upper surface of the partition. A first plate formed, A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP. (correction) A first plate in which electrodes are arranged in a stripe shape by scanning the nozzles while discharging electrode material ink containing electrode materials on the surface so as to be a continuous flow from the nozzles; A PDP including a second plate overlapping the partition of the first plate, the second plate being sealed with the gas medium sealed; And a driving circuit for driving the PDP.

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