JPH11224609A - Phosphor paste and manufacture of substrate for plasma display panel using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a phosphor paste for a plasma display panel substrate which can be precisely applied into a cell and becomes a phosphor layer in a proper shape in the cell after baking. SOLUTION: A phosphor paste is provided from which a fluorescent screen is formed by applying the phosphor paste between barrier ribs on a substrate of plasma display panel glass. The phosphor paste comprise phosphor powder- emitting light in either color of red, green, or blue of 30 to 60 wt.%, a binder resin of 5 to 21 wt.%, and a solvent. A weight ratio of the phosphor powders to the binder resin is 10:1 to 2:1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phosphor paste for a plasma display panel (hereinafter referred to as "PDP"), and more particularly, to a high-precision and simple PD.
The present invention relates to a phosphor paste for producing a P substrate and a method for producing a PDP substrate using the same.

[0002]

2. Description of the Related Art PDPs have permeated OA equipment and public information display devices because they can display at a higher speed than liquid crystal displays and can be easily made larger. Further, progress in the field of high-definition television is highly expected.

With the expansion of such applications, attention has been paid to color PDPs having a large number of fine display cells.
The PDP generates a plasma discharge between an anode and a cathode facing each other in a discharge space provided between a front glass substrate and a rear glass substrate, and emits ultraviolet light generated from a gas sealed in the discharge space. The display is performed by hitting a phosphor provided in the discharge space.
In this case, a partition (also referred to as a barrier or a rib) is provided to keep the spread of the discharge within a certain area and to perform display in a prescribed cell and to secure a uniform discharge space.

These partition walls are often formed in a stripe shape, and their sizes (line width, height, pitch) are P
Depends on DP performance. In order to increase the definition of PDP,
In other words, in order to increase the number of pixels at a certain screen size,
It is necessary to reduce the size of one pixel. In this case, it is necessary to reduce the pitch between the partition walls. However, when the pitch is reduced, the discharge space is reduced, and at the same time, the luminance is reduced because the phosphor application area is reduced. Specifically, a 42-inch high-definition television (1920 × 10
OA monitor (35 pixels) or 23 inch (XGA: 10
In order to realize (24 × 768 pixels), the pixel size needs to be 450 μm, and the partition walls for each color need to be formed at a pitch of 150 μm. In this case, if the line width of the partition wall is large, a sufficient discharge space cannot be secured, and the application area of the phosphor becomes small, so that it becomes difficult to improve the luminance. For this reason, the partition wall for high definition has a stripe shape and a line width of 15 to 50 μm.
Those having a height of 80 to 150 μm and a pitch of 100 to 250 μm are preferably used.

[0005] Partition walls are usually formed on the back plate, and between the cells formed by the partition walls, red (R),
A phosphor layer for performing green (G) and blue (B) color display is formed. The formation of these phosphor layers has been conventionally performed by a screen printing method using a phosphor paste. That is, a red light-emitting phosphor paste,
The green light-emitting phosphor paste and the blue light-emitting phosphor paste were each separated between partition walls (cells) using a screen printing plate.
And drying are sequentially repeated.

[0006] This phosphor coating technique is an elemental technique that affects the quality of the plasma display, and it is necessary to devise a method of applying the phosphor paste not only on the bottom of the cell but also on the side of the partition in order to increase the brightness. There is. In addition, stable uniform application is required to eliminate screen unevenness. Therefore, in the screen printing method, the positional accuracy with respect to the partition walls, the rheology of the paste, and the like are important.

However, the screen printing plate is not in contact with the flat surface, but the phosphor paste is transferred while being supported by the top of the partition, so that the dirt on the back surface of the screen printing plate adheres to the top of the partition. Besides that happens,
It is difficult to maintain positional accuracy because the metal mesh tends to be warped or twisted. This tendency becomes severe as the size increases, and it is very difficult to produce a large-size, high-definition plasma display by a screen printing method.

In order to improve the screen printing technique, Japanese Patent Application Laid-Open No. 6-5205 discloses a method using a sandblasting technique.
No. 5 proposes a method of screen printing after applying a crosslinking agent. However, these were within the scope of the screen printing method and were not sufficiently improved.

In addition, there is a method using a photolithography technique as a method for realizing high-precision pattern coating. In this case, in order to form phosphor layers of red, green, and blue, each color is formed. There is a problem that the steps become complicated, for example, the steps of coating, exposing and developing are repeated.

[0010] Therefore, as a method of applying the phosphor paste into the cells formed by the partition walls, a method has been proposed in which the phosphor paste is ejected from the tip of an ink jet nozzle to form a phosphor layer. However, the viscosity of the phosphor paste needs to be 0.2 poise or less, and the amount of the phosphor powder in the paste cannot be increased. Therefore, there is a problem that the thickness of the formed phosphor layer is reduced. Further, since the diameter of the ink jet nozzle is small, there is a problem that the phosphor powder is clogged.

[0011]

SUMMARY OF THE INVENTION Accordingly, the present invention solves the above-mentioned drawbacks of the prior art, and makes it possible to apply the phosphor paste uniformly and stably to the bottom and side surfaces of the partition walls. It is an object of the present invention to provide a phosphor paste capable of forming a phosphor layer having a uniform shape and producing a PDP substrate having high definition and high luminance.

[0012]

An object of the present invention is to provide a phosphor paste which forms a phosphor screen by being applied between partitions on a glass substrate of a PDP.
It is composed of 30 to 60% by weight of a phosphor powder emitting any one of blue, 5 to 20% by weight of a binder resin, and a solvent, and the weight ratio between the phosphor powder and the binder resin is 1
This can be achieved by a phosphor paste characterized in that the ratio is 0: 1 to 2: 1.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, a phosphor paste is obtained by dispersing and dissolving a phosphor powder emitting any one of red, green and blue colors and a binder resin component in an appropriate solvent (organic solvent or the like). It is. The proportion of the phosphor powder in the phosphor paste is 30 to 60% by weight, the proportion of the binder resin is 5 to 20% by weight, and the remainder is occupied by a solvent or the like. By using a phosphor paste having such a ratio, the viscosity is suitable for discharging from a die and has good applicability.

Finally, only the phosphor powder contained in the phosphor paste remains after the firing step to form a phosphor layer, so that the phosphor powder content in the phosphor paste is 30%.
６０60% by weight. If the content is less than 30% by weight, the phosphor layer becomes thin, and the luminance decreases. On the other hand, when the content exceeds 60% by weight, the viscosity of the paste increases, and the dischargeability and applicability from the die deteriorate. Preferably 40
６０60% by weight.

Further, the relationship between the amount of the phosphor powder and the amount of the binder resin is important as a factor deeply related to the applicability of the phosphor paste and the shape of the phosphor layer to be formed. Powder: binder resin = 1
It is necessary that the ratio be 0: 1 to 2: 1.

That is, in order to realize a high-luminance and excellent image display, a phosphor layer is almost uniformly formed on both the side and bottom surfaces of the stripe-shaped partition walls already formed.
It is necessary to satisfy the weight ratio.

When the amount of the phosphor powder exceeds 10 times the binder resin, the thickness of the phosphor layer on the side wall of the partition wall becomes large, and when the amount is less than 2 times, the bottom surface becomes thick, and the intended brightness cannot be achieved. Preferably, phosphor powder: binder resin (weight ratio) = 6: 1 to 3: 1, and more preferably, phosphor powder: binder resin (weight ratio) = 5: 1 to 4:
It is one.

Further, the content of the binder resin must be 5 to 20% by weight. When the content is less than 5% by weight, if the above-mentioned phosphor powder: binder resin (weight ratio) is maintained, the required phosphor powder ratio in the phosphor paste of the present invention cannot be obtained. If it exceeds, the viscosity of the paste becomes too high.

Further, selection of a binder resin is one of the important requirements.

The phosphor paste is preferably fired at a relatively low temperature of about 400 ° C., where deterioration of the phosphor powder is small, and methyl cellulose, ethyl cellulose, propyl cellulose, and the like can be fired at such a low temperature.
Cellulose resins such as hydroxymethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, hydroxymethylpropylcellulose, and hydroxyethylpropylcellulose can be mentioned, and these can be used as a binder resin. Particularly, methylcellulose and ethylcellulose are preferable from the viewpoint of dispersibility of the phosphor powder.

Further, among the cellulose-based resins, the solution viscosity when a 5% by weight solution is prepared using a mixed solvent of toluene / ethanol (mixing ratio 80/20) is 0.004 to 0.5.
It is preferable that the cellulose resin is 025 Pa · s. When the solution viscosity is higher than 0.025 Pa · s, the viscosity of the phosphor paste becomes high, which is not preferable in view of applicability. On the other hand, the solution viscosity is 0.004 Pa
If the viscosity is lower than s, the amount of the binder resin required to obtain a suitable viscosity as the phosphor paste increases, and it is difficult to maintain the phosphor powder: binder resin ratio required in the present invention.

The viscosity of the phosphor paste is preferably from 1 to 100 Pa · s, more preferably from 10 to 100 Pa · s, because it is suitable for applying the phosphor paste between the partition walls by discharging from a die having discharge holes. The pressure is 50 Pa · s, more preferably 10 to 30 Pa · s. For example, it can be easily achieved by adding 5 to 20% by weight of the above-mentioned cellulose resin having a specific solution viscosity as a binder resin in the phosphor paste.

The above viscosity can be measured by a rotational viscometer method or the like. Of these, 25 ° C using a B-type viscometer
At a shear rate of 1.2 to 24 s ^-1
It is a value measured in the range of the degree.

Another important component of the phosphor paste is a solvent, but it is necessary to use terpineol (terpineol) because it dissolves the binder resin well, sufficiently disperses the phosphor powder, and has excellent coatability. Is preferred. Commercial terpineol is a mixture of three isomers and is a liquid with a boiling point of 217-219 ° C.

However, since the binder resin has good solubility in terpineol, when terpineol is used as the solvent, the viscosity of the phosphor paste tends to increase. Therefore, the solvent may be a mixed solvent containing alcohols in addition to terpineol,
Dissolves a sufficient amount of binder resin to keep the coatability and the thickness of the phosphor layer to the required level, and is preferable in that the viscosity of the phosphor paste is maintained at a suitable level for discharge from the die. .

The alcohol is not particularly limited as long as it is soluble in terpineol. Among them, aromatic alcohols have a boiling point of about 200 to about the same as terpineol.
It is around 250 ° C., which is preferable in that the paste viscosity is reduced.

As the aromatic alcohol, for example, 2
-Phenoxyethanol, benzyl alcohol, γ-phenylallyl alcohol, dimethylbenzylcarbinol, β-phenylethyl alcohol and the like can be used. The aromatic alcohol itself cannot completely dissolve the cellulosic resin, and the dispersibility of the phosphor powder is relatively low. However, it does not pose a problem since the coexisting terpineol sufficiently functions. In particular, benzyl alcohol is preferably used from the viewpoint of the solubility of the binder resin.

The phosphor paste of the present invention may further comprise an organic compound dispersant such as an anionic or nonionic surfactant, a higher aliphatic alcohol, a plasticizer (for example, dibutyl phthalate, dioctyl phthalate, Polyethylene glycol, glycerin, etc.).

The phosphor powder that emits red, green or blue light used in the phosphor paste of the present invention is not particularly limited.
₂ O ₃ : Eu, YVO ₄ : Eu, Gd ₂ O ₃ : Eu, (Y,
Gd) BO ₃ : Eu, YBO ₃ : Eu and the like.
For a phosphor emitting green light, Zn ₂ SiO ₄ : Mn, BaAl
₁₂ O ₁₉ : Mn, BaMgAl ₁₆ O ₂₆ : Eu, Mn and the like. For a blue-emitting phosphor, CaWO ₄ : P
b, Y ₂ SiO ₅ : Ce, BaMgAl ₁₀ O ₁₇ : Eu and the like.

The particle size of the phosphor powder to be used is selected in consideration of the line width, partition interval and thickness of the phosphor layer pattern to be produced, and is selected by a laser diffraction scattering method (for example, a microtrack HRA particle size distribution analyzer). Wet measurement using
The average particle diameter measured in the above is 0.5 to 15 μm, more preferably 0.5 to 6 μm, and the specific surface area is 0.1 to 5
m ² / cc, more preferably 0.5 to ⁴ m ² / cc.

If the cumulative average particle diameter is less than 0.5 μm or the specific surface area exceeds 5 m ² / cc, the powder becomes too fine, so that the phosphor powder is liable to agglomerate and the discharge holes are liable to be clogged. Further, when the cumulative average particle diameter is 15
If it exceeds μm, or if the specific surface area is less than 0.1 m ² / cc, it is difficult to uniformly and smoothly form a phosphor layer having a target thickness (for example, 20 μm).

Further, the maximum particle size of the phosphor powder is 40 μm.
m or less, and even 20 μm or less,
This is preferable because troubles such as clogging at the time of ejection from a die hole of 200 μm can be reduced.

Further, when the particle size condition of the phosphor powder is within the above range, a highly accurate pattern shape can be obtained, the luminous efficiency of the phosphor is good, and the life is preferably long.

In the present invention, the phosphor paste has a viscosity of 1 to 100 Pa · s, and the phosphor powder contained has an average particle size of 0.5 to 15 μm and a specific surface area of 0.1 to 5 m.
² / cc, the maximum particle size is 40 μm or less, and the binder resin is a cellulose resin (more preferably, the viscosity when dissolved at a concentration of 5% by weight in a mixed solution of toluene and ethanol (mixing ratio: 80:20)). 0.004-0.025
(Pa.s cellulose-based resin) is particularly preferred.

The phosphor paste of the present invention is prepared by dispersing a phosphor powder in a binder solution prepared by heating and dissolving a binder resin in a solvent (about 80 ° C.) using a stirrer, for example, using a three-roll or ball mill. It can be manufactured by kneading using a machine.

Next, a PD using the phosphor paste of the present invention
A preferred method of manufacturing the P substrate will be described.

The PDP substrate is composed of, for example, 30 to 60% by weight of a phosphor powder emitting any one of red, green and blue, 5 to 20% by weight of a binder resin, and a solvent. The weight ratio with the resin is 10: 1 to 1
A 2: 1 phosphor paste can be manufactured by a method in which a phosphor screen is formed by discharging the paste from a die having discharge holes, applying the paste in stripes between partition walls on a glass substrate, and then firing.

At this time, it is preferable that after the phosphor paste is applied, the paste is dried before firing and the firing is performed at a relatively low temperature of about 400 to 450 ° C.

According to this method, a phosphor layer capable of obtaining sufficient luminance is formed on the side and bottom portions of the partition wall with the same thickness, and a good PDP substrate can be easily manufactured.

The method of applying the phosphor paste at this time will be described in detail with reference to the drawings.

FIG. 1 shows a glass substrate on which a phosphor paste is applied and on which partition walls are formed. Glass substrate 2
Has a pitch of 100 to 430 μm and a line width of 15 to 60 μm.
m, and a stripe-shaped partition wall 3 having a height of about 80 to 150 μm is formed.
The partitions are formed so that their cross sections are substantially rectangular, and the phosphor paste is applied in cells partitioned by these partitions to form red, green, and blue striped phosphor layers. .

That is, as shown in FIG. 2, a red phosphor layer 4, a green phosphor layer 5, and a blue phosphor layer 6 are repeatedly formed for each color, and one pixel line is formed by three stripes of red, green, and blue. Is formed to form a substrate for a color display.

As described above, the technique of applying the phosphor paste is an important technique that affects the quality of PDP, and a screen printing method has been used until now. When the partition pitch is 100 to 430 μm as described above, the application pitch of the phosphor paste in the case of applying three colors is 300 to 12
If the partition line width is 50 μm, the width between the partition walls to which the paste is applied is 50 to 380 μm. The phosphor paste extruded between the partition walls from the screen printing plate on which such a pattern is formed is transferred to the side surfaces of the partition walls, and then descends on the partition wall side surfaces under the own weight of the phosphor paste. It is thought that the coating layer of the phosphor paste is formed on the side surface and the bottom portion of the partition wall.

Therefore, when the viscosity of the phosphor paste is low, the paste concentrates on the bottom and the thickness of the side wall of the partition wall becomes thin, which causes a loss of luminance and a decrease in luminance at a wide viewing angle, and a high viscosity. In this case, it is effective to secure the luminance, but it is necessary to carefully set the application conditions.

Further, in the case of the application by such a screen printing method, the top of the partition wall may be contaminated with the paste of each color due to the problem of the wraparound of the paste on the back surface of the screen plate material and the problem of the positioning accuracy. How to remove such unnecessary paste is a very important problem from the viewpoint of improving the yield of the glass substrate.

From this point, it can be said that a preferable method for applying the phosphor paste is to apply the phosphor paste by discharging from a die having discharge holes in order to manufacture a high-definition glass substrate.
Specifically, as shown in FIG. 4, from a die having one or a plurality of discharge holes 7 (the shape of the discharge portion is a flat plate, a nozzle or needle, and the hole shape is circular, elliptical, slit, or the like), This is a method in which the step of discharging and applying any one of the phosphor pastes 8 of red, green and blue is repeated for each color, and a phosphor layer is formed through a drying and baking step. At this time, it is preferable to perform drying each time each color is applied.

In such an application method, it is also possible to apply a method in which each color phosphor paste is ejected from a base having ejection holes for simultaneously ejecting three colors of red, green and blue.
In addition, 9 in FIG. 4 is for explaining the distance between the tip of the discharge hole (needle) and the upper part of the partition wall in the embodiment.

As a method of discharging the phosphor paste from the die, it is preferable to continuously pressurize the paste with a certain range of pressure and discharge the paste with the pressure. Thereby, the discharge amount of the paste can be kept constant,
A stable coating thickness can be obtained.

After the phosphor paste is discharged from the discharge holes and applied between the partition walls, in a heating step such as drying and baking,
Organic components and organic solvents are evaporated or decomposed and removed,
A target phosphor layer composed of only the phosphor powder is formed on the substrate (FIG. 3).

Hereinafter, the present invention will be described specifically with reference to Examples, but it should not be construed that the invention is limited thereto. The concentration (%) is% by weight unless otherwise specified.

[0051]

Example 1 Phosphor powder 40%, ethyl cellulose (binder resin)
10%, benzyl alcohol 40% and terpineol 10% were dissolved and mixed to prepare a phosphor paste.
The ratio of the phosphor powder to the binder resin in this paste was 4: 1, and the viscosity of the paste was 14 for red, 18 for green, and 1 for blue.
It was 5 Pa · s.

The phosphor powder emits (Y, Gd) for emitting red light.
Three kinds of phosphor pastes were prepared using BO ₃ : Eu, Zn ₂ SiO ₄ : Mn for green light emission, and BaMgAl ₁₀ O ₁₇ : Eu for blue light emission. The cumulative average particle diameter, the maximum particle diameter, and the specific surface area of each color phosphor powder were as follows.

[0053] R ^{phosphor: 2.7μm, 13μm, 3.1m 2 /} cc G ^{phosphor: 3.6μm, 20μm, 2.5m 2 /} cc B phosphors: 3.7μm, 12μm, 2.3m ² / cc Each of the phosphor pastes of these colors was applied in a stripe shape to each of the pastes of red, green, and blue on a glass substrate on which 961 partitions having a pitch of 220 μm, a height of 120 μm, and a width of 30 μm were formed.

The coating was carried out by means of a die (L / D = 20) press-fitted at the tip with five 3 mm long needles having discharge holes with a diameter of 150 μm at a pitch of 660 μm. The bases are 2 for each of the red, blue and green phosphor pastes.
Each group was used. The two bases were set side by side at an interval of 105.6 mm in the direction perpendicular to the partition wall direction, synchronized, and simultaneously run in the same direction at the same speed. The distance between the tip of the needle and the upper end of the partition was set to 80 μm. Then, the discharge pressure was adjusted to 250 kPa with a dispenser, and a predetermined amount of the phosphor paste was discharged and applied between the partition walls while running the base parallel to the partition walls at a constant speed of 10 mm / s. First, a red phosphor paste is applied between predetermined partition walls.
0 was applied at a time. At this time, two bases are placed 3300 in the direction perpendicular to the partition wall direction at the position where the ten coatings are completed.
It was moved by μm. Next, the coating was applied between the 10 partition walls while the die was running in the reverse direction in the same manner. This was repeated, and 320 red phosphors at predetermined positions were applied. After completion of the coating, the coating was dried at 80 ° C. for 40 minutes with the coated surface facing upward. next,
320 blue phosphor pastes were similarly applied between the adjacent partitions coated with the red phosphor and dried. Next, 320 green phosphor pastes were similarly applied between the adjacent partitions coated with the blue phosphor and dried. Then, the obtained glass substrate was baked at 400 ° C. for 30 minutes.

When the thickness of the side surface and the bottom portion of the fired phosphor layer were observed by an electron microscope, the phosphor for each color was formed in a stripe shape with a thickness of 20 ± 3 μm on the side surface and the same thickness of 20 ± 3 μm on the bottom. A substrate was obtained.

Comparative Example 1 The composition of the phosphor paste was as follows: phosphor powder 24%, ethyl cellulose (binder resin) 2%, terpineol 74%
A paste was prepared and applied in the same manner as in Example 1 except that the discharge pressure was set to 400 kPa, and a partition was formed. The ratio of the phosphor powder to the binder resin in this paste is 1
2: 1 and the paste viscosities are 25 red, 30 green, and 2 blue.
It was 6 Pa · s. The same phosphor powder as in Example 1 was used.

Observation of the thickness of the side surface and the bottom portion of the fired phosphor layer by an electron microscope revealed that each color phosphor was formed in a stripe shape with a thickness of 15 ± 3 μm on the side surface and a bottom portion of 6 ± 3 μm. The side thickness was larger than the bottom thickness, and only a thinner overall was obtained.

[0058]

The phosphor paste of the present invention is a phosphor paste which forms a phosphor screen by being applied between partition walls on a glass substrate for PDP, and is one of red, green and blue.
It is composed of 30 to 60% by weight of a phosphor powder emitting light of a color, 5 to 20% by weight of a binder resin and a solvent, and the weight ratio of the phosphor powder to the binder resin is 10: 1 to 2: 1. Therefore, it is possible to apply the same thickness to the side and bottom portions of the partition wall, and to obtain P with high definition and high brightness.
A DP substrate can be obtained. In particular, by applying the method of applying the phosphor paste between the barrier ribs by discharging from a die having a discharge hole, the phosphor paste can be accurately applied in the cell, and a more excellent PDP substrate can be obtained. .

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a glass substrate on which a partition used to carry out the present invention is formed.

FIG. 2 is a PDP after applying the phosphor paste of the present invention.
It is a schematic diagram which shows an example of the board for use.

FIG. 3 is a schematic view showing an example of a PDP substrate after firing.

FIG. 4 is a view schematically showing an example of a method for applying a phosphor paste of the present invention.

[Explanation of symbols]

 1: Electrode 2: Glass substrate 3: Partition wall 4: Red phosphor layer 5: Green phosphor layer 6: Blue phosphor layer 7: Discharge hole 8: Phosphor paste 9: Distance between tip of discharge hole portion and top of partition

Claims (8)

[Claims] 1. A phosphor paste for forming a phosphor screen by being applied between partition walls on a glass substrate of a plasma display panel, wherein the phosphor powder emits any one of red, green and blue colors. % By weight, binder resin 5-2
A phosphor paste comprising 0% by weight and a solvent, wherein the weight ratio between the phosphor powder and the binder resin is 10: 1 to 2: 1. 2. The phosphor paste according to claim 1, wherein the viscosity is from 1 to 100 Pa · s. 3. A phosphor powder having a cumulative average particle size of 0.5 to 1
The phosphor paste according to claim 1, wherein the phosphor paste has a specific surface area of 5 μm and a specific surface area of 0.1 to 5 m ² / cc. 4. The phosphor paste according to claim 1, wherein the maximum particle size of the phosphor powder is 40 μm or less. 5. The phosphor paste according to claim 1, wherein the binder resin is a cellulosic resin. 6. The phosphor paste according to claim 1, wherein the solvent is a mixed solvent containing alcohols. 7. The phosphor paste according to claim 1, wherein the solvent is a mixed solvent containing terpineol and an aromatic alcohol. 8. A phosphor powder which emits any one of red, green and blue colors, 30 to 60% by weight, and a binder resin, 5 to 20% by weight.
And a solvent, and the phosphor paste having a weight ratio of the phosphor powder to the binder resin of 10: 1 to 2: 1 is discharged from a die having discharge holes, and is formed into stripes between partition walls on a glass substrate. A method for manufacturing a substrate for a plasma display panel, comprising forming a phosphor screen by applying the phosphor to a substrate and then firing the substrate.