JP4221974B2 - Method for manufacturing plasma display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a plasma display panel , which is known as a large-screen, thin and lightweight display device.
[0002]
[Prior art]
In recent years, a display using a plasma display panel (PDP) has attracted attention as a display panel (thin display device) with excellent visibility, and high definition and a large screen are being promoted.
[0003]
This PDP is broadly divided into AC type and DC type in terms of driving, and there are two types of discharge types, a surface discharge type and a counter discharge type. From the viewpoint of high definition, large screen, and ease of manufacturing. At present, AC type and surface discharge type PDPs are becoming mainstream.
[0004]
FIG. 4 shows an example of a panel structure in the PDP. As shown in FIG. 4, a plurality of pairs of striped display electrodes 4 are formed on a transparent front substrate 1 such as a glass substrate, and a pair of scanning electrodes 2 and sustain electrodes 3 is formed on the substrate 1. A light shielding layer 5 is disposed between adjacent display electrodes 4. The scanning electrode 2 and the sustain electrode 3 are respectively composed of transparent electrodes 2a and 3a and buses 2b and 3b made of silver or the like electrically connected to the transparent electrodes 2a and 3a. A dielectric layer 6 is formed on the front substrate 1 so as to cover the plurality of pairs of electrodes, and a protective film 7 is formed on the dielectric layer 6.
[0005]
In addition, a plurality of stripes covered with a base layer 9 are formed on the substrate 8 on the back side opposite to the substrate 1 on the front side in a direction perpendicular to the display electrodes 4 of the scan electrodes 2 and the sustain electrodes 3. The data electrode 10 is formed. On the base layer 9 between the data electrodes 10, a plurality of stripe-shaped partition walls 11 are arranged in parallel with the data electrode 10, and a phosphor layer 12 is provided on the side surface 11 a between the partition walls 11 and the surface of the base layer 9. It has been.
[0006]
The substrate 1 and the substrate 8 are opposed to each other with a minute discharge space therebetween so that the scan electrode 2 and the sustain electrode 3 and the data electrode 10 are orthogonal to each other, and the periphery is sealed. One or a mixed gas of helium, neon, argon, and xenon is sealed in the space as a discharge gas. In addition, the discharge space is divided into a plurality of sections by partition walls 11 to provide a plurality of discharge cells 13 at which the intersections of the display electrodes 4 and the data electrodes 10 are located. The phosphor layers 12 are sequentially arranged one by one so as to be blue.
[0007]
As shown in FIG. 5, the electrode arrangement of the panel body has a matrix configuration comprising M rows × N columns of discharge cells, and M rows of scan electrodes SCN1 to SCNM and sustain electrodes SUS1 to SUSM are arranged in the row direction. N columns of data electrodes D1 to DN are arranged in the column direction.
[0008]
[Problems to be solved by the invention]
In the conventional PDP, various phosphor layers are mainly formed between the partition walls partitioning the base layer and the discharge section on the substrate on which the phosphor is applied. The colors of the base layer and the partition walls are as follows. A white one was used. However, in the case of such a structure, when the panel is viewed in a particularly bright place, the white spot area in the non-discharge region in the panel increases, and it is not possible to improve the contrast in the bright place.
[0009]
Therefore, in order to improve the contrast in the bright place, it is conceivable to improve the contrast in the bright place by forming a black material layer on the partition wall and increasing the black spot area in the non-discharge region in the panel. However, in such a configuration, there is a problem that the material layer is easily peeled off from the partition wall, and the peeled material layer adversely affects the discharge of the panel.
[0010]
An object of the present invention is to solve such problems and to improve the contrast in a bright place by increasing the black spot area in the non-discharge region in the panel.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the PDP manufacturing method of the present invention forms a base layer on the substrate on which the partition is formed, and forms a black first partition layer having a predetermined pattern shape on the base layer. After that, a white second partition layer made of the same material as the base layer is formed so as to cover the first partition layer and the base layer, and then the base layer and the first partition layer of the second partition layer are formed. A region parallel to the upper substrate is removed by sand blasting to expose the surfaces of the first partition layer and the base layer, thereby forming the partition.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
That is, according to the first aspect of the present invention, at least one partition wall for partitioning the discharge space into a plurality of at least one pair of substrates transparent at least on the front side is arranged so as to form a discharge space between the substrates. A method for manufacturing a plasma display panel having a panel body in which an electrode group is disposed on a substrate and a phosphor layer that emits light by discharge is disposed so that a discharge is generated in a discharge space partitioned by the partition wall And forming a base layer on the substrate on which the partition wall is formed, and forming a black first partition layer having a predetermined pattern shape on the base layer, and then covering the first partition layer and the base layer. in the form of a white second partition wall layer made of the same material as the base layer, then the substrate parallel areas on the underlying layer and the first barrier layer of the second barrier rib layer It is characterized in that forming the partition wall by exposing the surface of the first barrier rib layer and the underlayer are removed by command blasting.
[0013]
Hereinafter, a method of manufacturing a PDP according to an embodiment of the present invention will be described with reference to FIGS.
[0014]
1A to 1E show a manufacturing process of a partition wall in a method for manufacturing a PDP according to an embodiment of the present invention.
[0015]
First, as shown in FIG. 1A, a photosensitive black first layer is formed on a base layer 21 formed on a back substrate (not shown) through a coating process and a baking process. A first barrier rib material layer 22 is formed, and a mask 23 for patterning the first barrier rib material layer 22 into a predetermined arbitrary shape is arranged, and exposure light 24 for patterning is irradiated. Note that a positive type or a negative type is used as a mask for patterning the first partition wall material layer 22 into an arbitrary shape.
[0016]
Thereafter, exposure and development processes are performed to form a first partition wall material layer 22 having a predetermined shape as shown in FIG. 1B. Then, as shown in FIG. A white second barrier rib material layer 25 is formed on the first barrier rib material layer 22 patterned into a predetermined shape through a coating process so as to cover them. After that, by performing a baking treatment, a structure in which the second partition layer 27 is formed so as to cover the base layer 21 and the first partition layer 26 is formed.
[0017]
Thereafter, as shown in FIG. 1D, the second barrier rib layer 27 sintered on the base layer 21 and the first barrier rib layer 26 is dry-etched by a sandblasting method. In a region parallel to the base layer 21 on the substrate, the base layer 21 and the first partition layer 26 formed under the same layer are exposed. By this treatment, the top surface of the black first partition layer 26 is exposed, and the white second partition layer 27 remains on the side wall of the first partition layer 26. At this time, if the thermal expansion coefficients of the materials constituting the base layer 21, the first partition layer 26, and the second partition layer 27 are substantially equal, the second partition layer 27 is in wide contact with the base layer 21 and the first partition layer 26. It will be in contact with the area. Furthermore, if the base layer 21 and the second partition layer 27 are made of the same material, it is possible to form a partition having a more robust structure.
[0018]
After the step, a phosphor layer is formed by applying and forming a desired phosphor in the direction indicated by arrow A in FIG.
[0019]
According to the manufacturing method as described above, since the partition wall in which the side wall of the black first partition layer 26 is covered with the white second partition layer 27 is obtained, the contrast in a bright place can be improved, and Since the second partition layer 27 is firmly adhered to the side wall of the first partition layer 26, there is no problem that the second partition layer 27 is peeled off and adversely affects the discharge.
[0020]
2 (a) to 2 (c) and FIGS. 3 (d) to 3 (f) show the manufacturing process according to another embodiment of the present invention. FIG. 2 and FIG. It is a figure which shows the process of the example at the time of forming an auxiliary partition so that it may orthogonally cross the stripe-shaped partition as shown.
[0021]
First, as shown in FIG. 2 (a), as in FIG. 1 (a), coating is performed on the base layer 21 formed on the substrate (not shown) on the back side through the coating process and the firing process. A photosensitive black first barrier rib material layer 22 is formed through the process, and a mask 23 for patterning the first barrier rib material layer 22 into a predetermined arbitrary shape is disposed, and patterning is performed. Irradiation light 24 is irradiated. At this time, the first partition wall material layer 22 is patterned into a lattice shape.
[0022]
Thereafter, a development process is performed to form a first partition wall material layer 22 having a predetermined shape, and then the first partition wall material layer 22 is baked to form a grid-shaped first partition wall layer 26 on the base layer 21. Form.
[0023]
Thereafter, as shown in FIG. 2B, a photosensitive black third partition wall material layer 28 is formed on the first partition wall layer 26 by a coating process, and the third partition wall material layer 28 is formed into a predetermined arbitrary layer. A mask 23 for patterning is arranged in the shape of, and an exposure light 24 for patterning is irradiated. Then, after that, by performing a developing process, as shown in FIG. 2C, the third partition wall material layer 28 having a predetermined shape as stacked on a part of the grid-shaped first partition wall layer 26 is obtained. Then, the third partition wall material layer 28 is baked to obtain a partition wall having a shape in which an auxiliary partition wall having a low height is formed so as to be orthogonal to the striped partition wall. Reference numeral 29 denotes a third partition layer.
[0024]
Thereafter, as shown in FIG. 3 (d), the base layer 21 and the first partition layer 26 and the third partition layer 29 patterned in a predetermined shape are subjected to a coating process so as to cover them. The second partition material layer 25 is formed, and then a baking process is performed to form a structure in which the second partition layer 27 is formed so as to cover the base layer 21, the first partition layer 26, and the third partition layer 29. To do.
[0025]
Thereafter, as shown in FIG. 3 (e), the second partition layer 27 is dry-etched by sandblasting, so that the region of the second partition layer 27 parallel to the base layer 21 on the substrate is the same layer. The base layer 21, the first partition layer 26, and the third partition layer 29 formed in the lower portion of the substrate are exposed. By this treatment, the top surfaces of the black first partition layer 26 and the third partition layer 29 are exposed, and the white second partition layer 27 is formed on the side walls of the first partition layer 26 and the third partition layer 29. Remains.
[0026]
At this time, as in the above embodiment, if the thermal expansion coefficients of the materials constituting the base layer 21, the first partition layer 26, the second partition layer 27, and the third partition layer 29 are substantially equal, the second partition layer 27 Is in contact with the base layer 21, the first partition layer 26, and the third partition layer 29 with a wide contact area. Furthermore, if the base layer 21 and the second partition layer 27 are made of the same material, it is possible to form a partition having a more robust structure.
[0027]
After the step, a phosphor layer is formed by applying and forming a desired phosphor in the direction indicated by arrow A in FIG.
[0028]
According to the manufacturing method as described above, since the partition walls in which the side walls of the black first partition layer 26 and the third partition layer 29 are covered with the white second partition layer 27 are obtained, the contrast in a bright place is improved. In addition, since the second barrier rib layer 27 is firmly adhered to the side walls of the first barrier rib layer 26 and the third barrier rib layer 29, the second barrier rib layer 27 is peeled off and adversely affects the discharge. Does not occur.
[0029]
【The invention's effect】
As apparent from the above description, according to the manufacturing method of the present invention, since the partition wall in which the side wall of the black partition layer is covered with the white partition layer is obtained, the contrast in a bright place can be improved, In addition, since the white partition layer is firmly adhered to the side wall of the black partition layer, there is an effect that the problem that the white partition layer peels off and adversely affects the discharge does not occur.
[Brief description of the drawings]
FIGS. 1A to 1E are process diagrams showing a manufacturing process of barrier ribs in a method of manufacturing a plasma display panel according to an embodiment of the present invention. FIGS. FIGS. 3A to 3F are process diagrams showing a partition wall manufacturing process in a method for manufacturing a plasma display panel according to another embodiment. FIGS. 3D to 3F show a method for manufacturing a plasma display panel according to another embodiment of the present invention. FIG. 4 is a perspective view showing an example of a plasma display panel. FIG. 5 is a schematic view showing electrode wiring of the panel.
21 Base layer 22 First partition material layer 25 Second partition material layer 26 First partition layer 27 Second partition layer

Claims (1)

At least a pair of substrates transparent at least on the front side are disposed opposite to each other so that a discharge space is formed between the substrates, and a partition for partitioning the discharge space into a plurality is disposed on at least one substrate, and is partitioned by the partition In a method of manufacturing a plasma display panel having a panel body in which an electrode group is arranged on a substrate so that discharge occurs in a discharge space and a phosphor layer that emits light by discharge is provided, an underlayer is formed on the substrate on which the barrier rib is formed And forming a black first barrier rib layer having a predetermined pattern shape on the base layer, and then covering the first barrier rib layer and the base layer with a white first layer made of the same material as the base layer. 2 to form a barrier layer, the first barrier rib layer is removed by subsequent sandblasting the substrate parallel areas on the underlying layer and the first barrier layer of the second barrier rib layer Method of manufacturing a plasma display panel, characterized by forming the partition wall by exposing the surface of the fine undercoat layer.

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