JPH0831328A - Plasma display panel and its manufacture - Google Patents

Abstract

PURPOSE:To provide a reflection layer in good dimensional and positional accuracy which is located on the bottom surface of a display cell and presents an excellent discharge characteristic by furnishing a small hole for discharging in the reflection layer in a position over the electrode. CONSTITUTION:A DC type plasma display has an anode electrode 3 and cathode electrode between a front plate and back plate consisting of an insulative material while a certain space is reserved in between, and a barrier wall 5 furnished between the two electrodes forms a display cell and an aux. cell. Within the display cell, a reflection layer 8 is provided on the oversurface of the back plate, and a small hole for discharging 9 is provided in the reflection layer 8 in a position over the anode electrode 3. This small hole for discharging is made in a certain shape, for example quadriangular, and each corner of the hole is formed in a curved surface. If the layer 8 and small hole 9 are made from a negative type photo-sensitive paste or positive type photo-resist, reflection layer 8 white, dense, and turned in glass can be formed with good dimensional and positional accuracy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel (hereinafter referred to as PDP) and its manufacturing method,
More specifically, the shape of the discharge holes of the reflective layer is made uniform,
The present invention relates to a PDP having a reflective layer having excellent discharge characteristics, and a method for manufacturing the PDP capable of forming the reflective layer with high dimensional and positional accuracy.

[0002]

2. Description of the Related Art In the case of a PDP, for example, a DC type PDP,
Examples of the basic configuration are shown in FIGS. That is, in the DC PDP, a front plate 1 and a back plate 2 made of an insulating plate are arranged with a certain space therebetween, and an anode electrode group (anode) 3 that is opposed to and intersects between the both plates 1 and 2. A cathode electrode group (cathode) 4 is provided, and a barrier 5 is provided between the two electrode groups 3 and 4 to prevent light crosstalk and to keep the two electrode groups 3 and 4 at a constant distance to secure a discharge space. A display cell 6 and an auxiliary cell 7 are formed by the barrier 5, the reflective layer 8 is provided on the back plate 2 in the display cell 6, and the electrode 3 of the reflective layer 8 is provided.
A rectangular discharge small hole 9 is provided in the reflective layer 8 located on the upper side, and a rare gas is further sealed between the two electrode groups 3 and 4.

The light emitted from the PDP is the auxiliary cell 7
While receiving the supply of charged particles and the like from the seed fire discharge through the priming path 10, the display discharge is generated inside the display cell 6 to generate ultraviolet rays. Visible light is obtained from the phosphor screens 11, 12, and 13 excited by the ultraviolet rays. Therefore, in this color PDP, the barrier for forming the display cell needs to be hermetically sealed in order to drive the memory to obtain high brightness or prevent color bleeding. In addition, the white and dense reflective layer 8 is required in order to effectively utilize the light emission of the phosphor and to improve the brightness.

By the way, the reflective layer in this PDP is
Generally, it is formed by printing a reflection layer forming paste on an insulator by a thick film printing method and baking the reflection layer forming paste (see JP-A-6-5207).

[0005]

However, when the reflective layer and the small holes for discharge are formed by using the thick film printing method, there are the following problems. That is, due to the sagging of the reflection layer forming paste, variations occur in the shape and opening area of the discharge small holes, and this variation easily causes variations in the emission brightness of each display cell. In addition, the discharge small hole needs to be accurately positioned on the anode electrode of the insulator, but there is a limit to the improvement of the position accuracy, and in particular, it is required to secure the position accuracy when the screen is enlarged in recent years. Can't handle. Further, since the discharge small holes are quadrangular and the corners thereof are formed at an acute angle close to 90 °, firing shrinkage occurs during the baking, and distortion due to baking occurs in the shape of the small holes. Then, the distortion due to the firing causes variations in the shape of the small holes, and the variations in the shapes cause variations in the luminance between cells, and the display characteristics of the PDP deteriorate. There is a problem such as.

Therefore, the present inventor has conducted various studies in order to eliminate such shape variations and improve the positional accuracy, and as a result, by using a photography method effective in forming a barrier in a PDP, baking is performed. It has been clarified that it is possible to form a reflective layer that can reduce the distortion of the shape due to the shape, has no variation in the shape and the opening area, and can improve the positional accuracy.

The present invention has been made in response to the above-mentioned problems, and the object of the present invention is to make the shape of the discharge holes of the reflective layer uniform and to provide a reflective layer having excellent discharge characteristics. An object of the present invention is to provide a PDP and a PDP manufacturing method capable of forming the reflective layer with high dimensional and positional accuracy.

[0008]

A PDP of the present invention as a means for solving the above-mentioned problems has a pair of insulating plates arranged with a certain space therebetween and a plurality of electrodes between the insulating plates. A group and a barrier are provided, a display cell is formed by the barrier, and a reflective layer is provided on at least a part of the bottom surface of the display cell, and a small hole for discharge is provided in the reflective layer located on the electrode. The small eyelet shape is circular or polygonal corners are formed on the curved surface.

Further, in the method for manufacturing a PDP of the present invention, the reflective layer formed on at least a part of the bottom surface of the display cell has a negative photosensitive paste for forming the reflective layer on the entire surface of the insulating plate on which the electrode is formed. The first step of applying to obtain a paste layer,
After drying the paste layer, a second step of selectively irradiating and exposing the reflective layer forming portion of the paste layer with ultraviolet rays, and a paste having a desired thickness by repeating the first and second steps several times as necessary. After obtaining the reflective layer forming part of the layer, a third step of uniformly developing the coating film with a developing solution to obtain a reflective layer pattern, and baking the reflective layer pattern to form an organic layer in the reflective layer pattern. It is configured to be formed through a fourth step of volatilizing the components and obtaining a vitrified white reflective layer consisting of only the inorganic components.

Further, in the method for manufacturing a PDP of the present invention, the reflective layer formed on at least a part of the bottom surface of the display cell has a thickness equal to or greater than that of the reflective layer formed on the insulating plate on which the electrodes are formed. The first step of applying a positive photoresist to obtain a positive photoresist layer, the second step of selectively irradiating and exposing the reflective layer forming portion of the positive photoresist layer with ultraviolet light, and the exposed step A third step of developing the reflection layer forming portion of the positive photoresist layer with an alkali developing solution to remove the reflection layer forming portion to form an opening, and filling the opening with a reflection layer forming paste. In four steps, the positive photoresist layer whose openings are filled with the reflection layer forming paste is irradiated with ultraviolet rays over the whole surface to make it soluble in a developing solution, and then the positive photoresist layer is made into an alkaline developing solution. Yo The fifth step of developing, removing the positive photoresist layer and leaving only the pattern of the reflection layer forming paste, and forming the reflection layer pattern; and baking the reflection layer pattern to form an organic layer in the reflection layer pattern. It is configured to be formed through a sixth step of volatilizing the components and obtaining a vitrified white reflective layer consisting of only the inorganic components.

[0011]

In the PDP of the present invention, the visible light emitted from the phosphor can be effectively utilized by providing the reflective layer on at least a part of the bottom surface of the display cell, and the reflective layer located on the electrode is used for discharging. By forming a small hole and forming the discharge small hole in a circular shape or a polygonal corner portion into a curved surface, when forming the reflection layer and the discharge small hole, the occurrence of cracks due to firing shrinkage during baking is reduced. Act as you can.

Further, in the method for manufacturing a PDP according to claims 2 and 3 of the present invention, since the negative type photosensitive paste or the positive type photoresist is used and the reflection layer and the discharge small holes are formed by the photolithography method, vitrification is performed. The white and dense reflective layer can be formed with high dimensional and positional accuracy, and the discharge small holes can be formed on the electrode in a predetermined shape and without variations.

[0013]

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

-Embodiment 1-This embodiment is a DC type PDP, which is described in the above-mentioned prior art and as shown in FIG. A face plate 2 is arranged, and an anode electrode 3 and a cathode electrode 4 that face each other and intersect between the both plates 1 and 2.
A barrier 5 is provided between the electrodes 3 and 4 to prevent crosstalk of light and to secure a discharge space between the electrodes 3 and 4 by a constant distance. And an auxiliary cell 7 are formed, and a rare gas is sealed between the electrodes 3 and 4 (see FIG. 5). Further, a reflective layer 8 is provided in the display cell 6 on the upper surface of the back plate 2, and the anode is A small hole 9 for discharge is provided in the reflective layer 8 located on the electrode 3. In the PDP of this embodiment, the discharge small holes 9 are square small holes as shown in FIG. 1, and each corner portion 9a is formed into a curved surface.

The front plate 1 and the rear plate 2 are insulating substrates made of a glass plate or the like. Inside the front plate 1, a plurality of cathode electrodes 4 are provided in parallel, and inside the rear plate 2, A plurality of anode electrodes 3 are provided so as to be orthogonal to the cathode electrodes. The anode electrode 3 is formed of a display electrode 3a and an auxiliary electrode 3b using a conductive metal such as Ni or Al, or an alloy thereof, or a paste obtained by mixing a small amount of glass into these metals. Further, as the cathode electrode 4,
A transparent electrode formed by depositing indium oxide and tin oxide is used.

The barrier 5 is formed by three vertical barriers 5b parallel to the anode electrode 3 and a plurality of horizontal barriers 5a parallel to the cathode electrode 4 and orthogonal to the vertical barrier 5b. A display cell 6 is formed by the cathode electrode 4 and the display electrode 3a in a plurality of spaces partitioned by 5a.
A plurality of the barriers 5 are provided in parallel, and the auxiliary cell 7 is formed by the auxiliary electrode 3b and the cathode electrode 4 in the space between the adjacent barriers 5 and 5.

The reflective layer 8 is a layer for effectively utilizing the visible light emitted from the fluorescent substance by the discharge from the discharge holes 9, and is formed of a whitened glass layer having a high reflectance. There is. The reflective layer 8 is formed on the back plate 2,
Usually, the thickness is 10 μm to 60 μm, preferably about 40 μm. The barrier 5 is formed on the reflective layer 8. The discharge small hole 9 is provided at the corner 9a.
A radius of curvature is 50 μm.

Next, the reflection layer 8 in the PDP of this embodiment.
A method of forming the will be described. The method of forming the reflective layer in this embodiment has four steps, namely, a negative photosensitive paste layer forming step, an ultraviolet exposure step, a reflective layer pattern forming step, and a baking step, as shown in FIG. Hereinafter, each step will be described.

-Negative-type photosensitive paste layer forming step (first step) -In this step, a negative-type photosensitive paste for forming a reflective layer is applied to the entire surface of the insulating plate 2 provided with the anode electrode 3 to form a paste. This is the step of obtaining the layer 20 (see FIG. 2a). Here, as the negative type photosensitive paste, lead borosilicate glass: 4
0 to 80 parts by weight, alumina: 10 to 30 parts by weight, titanium oxide: 10 to 30 parts by weight of inorganic powder, more preferably lead borosilicate glass: 65 parts by weight, alumina: 20 parts by weight, oxidation Titanium: Inorganic powder contained in a ratio of 15 parts by weight: 100 parts by weight, ultraviolet curing resin: 20
~ 100 parts by weight (preferably 50 parts by weight) and a paste obtained by mixing a solvent are used. Here, the reason why the inorganic powder is used is that it is white and densified by baking in the subsequent step, that the barrier 5 and the shrinkage balance at the time of baking are good, and that the reflectance is high. The ultraviolet curable resin is a resin that is cured by being irradiated with ultraviolet rays and insolubilized in a developing solution. For example, a polymer having at least one unsaturated bond such as polyester acrylate or polyester methacrylate can be used. Also, n-butyl ether acetate can be used as the solvent.

-Ultraviolet exposure step (second step) -In this step, after the paste layer 20 is dried, the paste layer 2 is formed.
This is a step of irradiating and exposing the 0 reflective layer forming portion 21 with ultraviolet rays to cure the reflective layer forming portion 21 (see FIG. 2B).
Here, the irradiation / exposure of the ultraviolet rays is performed by using a mask 22 that can shield a portion corresponding to the auxiliary cell 7 and a portion corresponding to the discharge small hole 9. Further, it is necessary that the irradiation amount of ultraviolet rays be an amount by which the bottom of the paste layer 20 is exposed and cured.

-Reflective Layer Pattern Forming Step (Third Step) -This step is repeated the previous two steps several times to obtain a reflective layer forming layer 23 having a desired thickness, and then the developing layer is used to develop the reflective layer. In this step, the formation layer 23 is uniformly developed to obtain the reflection layer pattern 25 (see FIG. 2c). That is, after coating and forming the paste layer 20, irradiating and exposing the reflection layer forming portion 21 of the paste layer 20 with ultraviolet rays, and repeating the curing to form the reflection layer forming layer 23 having a desired thickness, the reflection layer forming layer 23 is formed. Is developed with a developing solution to form a discharge small hole 9 formed on the display electrode 3a of the anode electrode 3, and the auxiliary electrode 3
The non-exposed portion 24 corresponding to the portion b is eluted to obtain the reflective layer pattern 25. Here, the developing solution is selected and used according to the type of the ultraviolet curable resin contained in the paste.

-Firing Step (Fourth Step) -In this step, the reflection layer pattern 25 is fired (see FIG. 2d) to volatilize the organic components in the reflection layer pattern 25, and vitrified white consisting of only inorganic components. This is a step of obtaining the reflective layer 8 of (see FIG. 2e). Here, the reflective layer pattern 2
The firing temperature of 5 is 450 ° C to 600 ° C, preferably 58 ° C.
Set to 0 ° C. Then, by this firing, organic components such as resin of the paste forming the reflection layer pattern 25 are volatilized,
The sintered and vitrified inorganic component remains, and the remaining inorganic component forms the white reflective layer 8, and at the same time, the discharge small hole 9 having the radius at the corner 9a is formed on the anode electrode 3.

The reflective layer 8 formed by the above steps is dense, whitened and has a high reflectance, and the discharge small holes 9 are not displaced on the anode electrode 3 and cracks are not generated. It could be formed without. Further, the PDP provided with the reflective layer 8 and the discharge small holes 9 formed by this method has little variation in the brightness between the display cells and can cope with a large screen.

Embodiment 2 In the PDP of this embodiment, as shown in FIG. 3, the discharge small holes 9 are formed as circular small holes, and the reflection layer 8 and the discharge small holes 9 are positive type. It is formed by a photolithography method using a photoresist. Other configurations are the same as those in the first embodiment described above, and thus the description thereof is omitted.

Next, the reflective layer 8 in the PDP of this embodiment.
A method of forming the will be described. The method of forming the reflective layer in the present embodiment is roughly shown in FIG. 4, in which a positive photoresist layer forming step, an ultraviolet exposure step, an opening forming step, a reflective layer forming paste filling step, and a reflective layer pattern forming step are performed. There are six steps, a firing step and a firing step. Hereinafter, each step will be described.

—Positive Photoresist Layer Forming Step (First Step) — In this step, the positive photoresist layer 30 is formed by applying a positive photoresist onto the insulating plate 2 provided with the anode electrode 3.
(See FIG. 4a). Here, the thickness of the positive photoresist layer 30 is equal to or larger than that of the reflective layer 8 formed on the insulating plate 2. The positive photoresist is A manufactured by Hoechst Japan.
Z4903 was used.

-Ultraviolet Exposure Step (Second Step) -This step is a step of irradiating and exposing the reflective layer forming portion 31 of the positive photoresist layer 30 with ultraviolet rays using a mask 32 (see FIG. 4b). . Here, the irradiation / exposure of the ultraviolet rays is performed by using a mask 32 capable of shielding a portion corresponding to the auxiliary cell 7 and a portion corresponding to the discharge small hole 9.
In addition, the irradiation amount of ultraviolet rays is set to the positive photoresist layer 30.
It is necessary to set the exposure amount to the bottom.

-Opening Forming Step (Third Step) -In this step, the exposed positive photoresist layer 30 is developed with an alkaline developer to elute the reflection layer forming portion 31.
This is a step of removing and forming the opening 33 (see FIG. 4C). Therefore, the opening 33 can be obtained by developing and eluting the positive photoresist layer 30 other than the portion corresponding to the discharge small hole 8 and the auxiliary cell 7 with the alkaline developer.

-Reflective Layer Forming Paste Filling Step (Fourth Step) -This step is a step of filling the opening 33 with the reflective layer forming paste 34 (see FIG. 4d). As the paste for forming the reflection layer, a paste obtained by mixing the inorganic powder used in Example 1 described above with 1 to 20 parts by weight, preferably 5 parts by weight of a methacrylic resin and a solvent is used.

—Reflective Layer Pattern Forming Step (Fifth Step) — In this step, the positive photoresist layer 30 filled with the reflective layer forming paste 34 is irradiated with ultraviolet rays to develop the remaining positive photoresist 30a. After being soluble in the liquid, it is developed with an alkali developing solution to remove the positive photoresist 30a and leave only the pattern of the reflective layer forming paste 34 to form the reflective layer pattern 35 (FIG. 4e, see FIG. 4f). Here, when the positive photoresist layer 30 filled with the reflective layer forming paste 34 is irradiated with ultraviolet rays, the reflective layer forming paste 34 filled in the openings 33 is usually formed on the positive photoresist layer 30. Since it adheres to and remains on the substrate, it is performed after the adhered reflective layer forming paste 34 is removed by polishing, or before the reflective layer forming paste filling step (fourth step). Further, ultraviolet rays may be irradiated from the back surface side of the insulator 2 as needed. By doing so, ultraviolet rays can be sufficiently irradiated. Then, the positive photoresist remaining on the portion of the anode electrode 3 where the discharge small hole 9 is formed on the display electrode 3a and the portion of the auxiliary electrode 3b are removed, and the reflection layer pattern for forming the reflection layer 8 is formed. Get 35.

-Firing Step (Sixth Step) -This step is the same as the firing step in Example 1 described above. By this firing, the organic component in the reflective layer pattern 35 is volatilized, and the vitrified white reflective layer 8 consisting of only the inorganic component can be obtained (see FIG. 4g).
At the same time, a circular discharge hole 9 can be formed on the anode electrode 3.

The reflective layer 8 formed by the above steps is dense and white and has a high reflectance as in the case of Example 1, and the discharge small holes 9 are located on the anode electrode 3. It could be formed without displacement and without generation of cracks. Further, the PDP provided with the reflective layer 8 and the discharge small holes 9 formed by this method has little variation in the brightness between the display cells and can cope with a large screen.

Next, the PDP according to the first and second embodiments described above.
In order to confirm the effect of (1), when a reflection layer and a square discharge hole having a rounded corner are formed by a photolithography method using a negative photosensitive paste (Example 1), When the circular discharge holes are formed by a photolithography method using a positive photoresist (Example 2), the reflective layer and the square discharge holes are formed by a thick film printing method (conventional method). ),
For each of the case where the reflective layer and the rectangular discharge small holes are formed by the photolithography method using the negative photosensitive paste (comparative method), the positional accuracy of the discharge small holes 9 by the formation of the reflective layer 8 and the firing When the crack generation rate was examined, the results shown in Table 1 were obtained. The positional accuracy is measured by the maximum deviation amount from the Ni electrode (anode electrode) on the B5 size substrate, and the crack generation rate is 100 randomly selected from a plurality of discharge small holes, and the cracks are present. I counted the number.

As a result, in the conventional method and the comparative method, cracks were observed in all the discharge small holes, whereas in the case of Example 1, 10% of the discharge small holes were cracked. No cracks were observed at all in the case of Example 2. Further, in the case of the conventional method, a deviation of ± 20 μm was recognized, whereas in the case of the comparative method, Examples 1 and 2, a deviation of ± 5 μm was only recognized.
From this, it was confirmed that according to the present example, it is possible to obtain the discharge small holes with good positional accuracy and without generation of cracks. Then, the difference in the crack generation rate and the positional accuracy appears as a large difference in the luminance variation between the display cells, and in the case of the conventional method and the comparative method, the deterioration of the display characteristics of the PDP was recognized.

The present invention is not limited to the above-described embodiments, but includes configurations that can be modified and implemented within the scope of the present invention. Incidentally, in the above-described embodiment, the discharge eyelet is described as a circular shape and a quadrangular shape with rounded corners, but it may be an elliptical shape or a shape with rounded corners of other polygons. Of course it is good. Furthermore, in each of the above-described embodiments,
Although the DC-type PDP has been described as an example, the present invention is naturally applicable to all other PDPs.

[0036]

As is apparent from the above description, according to the PDP of claim 1 of the present invention, the visible light emitted from the phosphor is provided by providing the reflective layer on at least a part of the bottom surface of the display cell. The reflection layer and the discharge small hole can be effectively used, and the discharge small hole is formed in the reflection layer located on the electrode, and the discharge small hole has a circular shape or a polygonal corner portion with a curved surface to form the reflection layer and the discharge small hole. In doing so, there is an effect that it is possible to reduce the occurrence of distortion of the discharge small holes during the firing.

Further, according to the method for manufacturing a PDP of claims 2 and 3 of the present invention, since the negative photosensitive paste or the positive photoresist is used to form the reflective layer and the discharge small holes by the photolithography method, It has an effect that a vitrified white and dense reflective layer can be formed with high dimensional and positional accuracy, and discharge small holes can be formed on the electrode in a predetermined shape and without variation.

Therefore, according to the present invention, there are provided a PDP having a reflective layer having a uniform discharge hole in the reflective layer and excellent in discharge characteristics, and a PDP capable of forming the reflective layer with high dimensional and positional accuracy. A manufacturing method can be provided.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a PDP in which an electric discharge small hole is a square hole having rounded corners according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a structure in which a reflective layer is formed using a negative photosensitive paste.

FIG. 3 is a schematic perspective view of a PDP in which the discharge small holes are circular holes.

FIG. 4 is a cross-sectional view showing a structure in which a reflective layer is formed using a positive photoresist.

FIG. 5 is a schematic diagram of a PDP.

FIG. 6 is a schematic perspective view of a conventional PDP in which the discharge small holes are square holes.

[Explanation of symbols]

1 ... Front plate, 2 ... Back plate, 3 ... Anode electrode, 3a ... Display electrode, 3b ... Auxiliary electrode, 4 ...
・ Cathode electrode, 5 ... Barrier, 5a ... Horizontal barrier, 5
b ... Vertical barrier, 6 ... Display cell, 7 ... Auxiliary cell, 8 ... Reflective layer, 9 ... Discharge small hole, 9a ...
Corners of small holes for discharge, 10 ... Priming path, 11, 12, 13 ... Fluorescent material, 20 ... Paste layer, 21 ... Reflective layer forming section, 22 ... Mask, 2
3 ... Reflective layer forming layer, 24 ... Non-exposed portion, 25 ...
-Reflective layer pattern, 30 ... Positive photoresist layer, 30a ... Remaining positive photoresist, 31
... Reflecting layer forming part, 32 ... Mask, 33 ... Opening part, 34 ... Reflecting layer forming paste, 35 ... Reflecting layer pattern

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiro Kato 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside the broadcasting technology laboratory of Japan Broadcasting Corporation (72) Takashi Kawai 1-10-11 Kinuta, Setagaya-ku, Tokyo Broadcasting Technology Institute of Japan Broadcasting Corporation (72) Inventor Hiroshi Murakami 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside Broadcasting Technology Laboratory of Japan Broadcasting Association (72) Takao Kuriyama 1-10 Kinuta, Setagaya-ku, Tokyo No. 11 Broadcasting Technology Institute of Japan Broadcasting Corporation (72) Inventor Eiji Munemoto 1-10-11 Kinuta, Setagaya-ku, Tokyo Inside Broadcasting Technology Laboratory of Japan Broadcasting Corporation

Claims (3)

[Claims] 1. A pair of insulating plates are arranged with a constant space therebetween, a plurality of electrode groups and barriers are provided between the insulating plates, and a display cell is formed by the barriers, and a bottom surface of the display cell is formed. A reflecting layer is provided at least in part, and a small hole for discharge is provided in the reflecting layer located on the electrode, and the small hole for discharge is formed in a circular shape or a polygonal corner portion is formed in a curved surface. Plasma display panel. 2. A pair of insulating plates are arranged with a constant space therebetween, a plurality of electrode groups and barriers are provided between the insulating plates, and the display cells are formed by the barriers. A method for manufacturing a plasma display panel, comprising: providing a reflective layer on at least a part of the reflective layer; and providing a discharge hole in the reflective layer located on the electrode, wherein the reflective layer reflects on the entire surface of the insulating plate. A first step of applying a negative photosensitive paste for layer formation to obtain a paste layer, and a second step of drying the paste layer and then selectively irradiating and exposing the reflection layer forming portion of the paste layer with ultraviolet rays. After the step and the first and second steps are repeated several times as necessary to obtain a reflection layer forming part of a desired thickness paste layer, the coating film is uniformly developed using a developing solution to form a reflection layer pattern. The third step of obtaining
A plasma display panel, which is formed through a fourth step of baking the reflective layer pattern to volatilize the organic component in the reflective layer pattern to obtain a vitrified white reflective layer consisting of only an inorganic component. Manufacturing method. 3. A pair of insulating plates are arranged with a constant space therebetween, a plurality of electrode groups and barriers are provided between the insulating plates, and the display cells are formed by the barriers. A method of manufacturing a plasma display panel, comprising: providing a reflective layer at least at a part thereof; and providing a discharge hole in the reflective layer located on the electrode, wherein the reflective layer is formed on the insulating plate. First step of applying a positive photoresist having a thickness equal to or greater than that of the layer to obtain a positive photoresist layer, and selectively irradiating / exposing ultraviolet rays on the reflection layer forming portion of the positive photoresist layer The second step, the third step of developing the reflective layer forming portion of the exposed positive photoresist layer with an alkali developing solution to remove the reflective layer forming portion to form an opening, and the opening step Reflective layer forming page And a fourth step of filling the reflective layer forming paste into the opening to solubilize it in a developing solution by irradiating the whole surface of the positive type photoresist layer with ultraviolet rays. Is developed with an alkali developing solution, the positive type photoresist layer is removed to leave only the pattern of the reflective layer forming paste, and a fifth step of forming the reflective layer pattern and baking the reflective layer pattern A method for producing a plasma display panel, which is formed through a sixth step of volatilizing an organic component in a layer pattern to obtain a vitrified white reflective layer made of only an inorganic component.