JPH1154029A - Manufacture of base board for display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide by a simple method a base board for a plasma display panel, which has a barrier plate with a desired fine pattern. SOLUTION: A metal mold 6, a porous sheet 20 in which raw material liquid for a barrier plate is impregnated and held and a glass plate 30 are placed in order on a fixed plate P1 of a heat press machine P. Heat pressing is then applied by lowering a movable plate P2, and a fine pattern 50 of the metal mold 6 is transcribed to the porous sheet 20. The integrated glass plate 30 and porous sheet 20 are taken out, and the porous sheet 20 is removed by baking, in order to obtain a base board for a plasma display panel, which has a barrier plate with a desired fine pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a display panel substrate having fine partition walls used for various display panels including a plasma display panel.

[0002]

2. Description of the Related Art The basic structure of a plasma display panel, which is also applied to a wall-mounted television, is, for example,
As shown in FIG. That is, the front panel A and the back panel B are overlapped so that the striped electrodes A1 and B1 formed on both panels are opposed to each other, and a discharge is caused in the striped or grid-shaped partition C at the intersection. To emit light.

The partition C is provided to prevent crosstalk of light and to provide a contrast of a screen, and is very fine. For example, in the case of a stripe, a width of about 30 μm and a height of about 200 μm
And formed over the front surface of the panel at intervals of about 100 μm. Then, a phosphor is applied to the inside of the partition C having such fine dimensions, and an inert gas such as Ne or Xe is sealed therein. Therefore, from the viewpoint of obtaining a complicated and clear image, the fine pattern required for the partition wall C is of course required, the coating amount of the phosphor is made constant, and the leakage of the inert gas is prevented by being in close contact with the front panel A. From the viewpoint and the like, the dimensional accuracy of the partition wall C is required to be high.

Conventionally, a screen printing method or a sand blast method has been adopted as a method for forming such a partition C. In the screen printing method, an operation of printing a glass paste on a glass substrate and drying the glass paste is repeated about 10 times each time with positioning, and a partition is formed by so-called overprinting. In the sand blasting method, a glass paste is applied to the front surface of a glass substrate, coated with a photoresist, exposed and developed, and thereafter, a portion not covered with the resist pattern is sand blasted to form a partition.

[0005]

In the method of forming the partition wall by the screen printing method, it is difficult to form a fine pattern due to the alignment and the distortion of the screen each time, and this difficulty is a major obstacle particularly in increasing the screen size. Has become. The occurrence of such a problem when the screen printing method is applied is also one of the reasons that the partition wall raw material liquid is easily dripped. Further, depending on the method of forming the partition walls by the sandblast method, the problem that the depth tends to be non-uniform cannot be mainly solved, and it is also difficult to form a fine pattern and enlarge the screen. Further, in any of the methods, it takes a long time to increase the dimensional accuracy, which causes a rise in manufacturing cost.

Therefore, the present invention solves the above-mentioned problems, and enables a fine pattern of a master mold to be transferred in a simple and precise manner. It is intended to provide a manufacturing method.

[0007]

The inventor of the present invention pays attention to the occurrence of a problem due to dripping of the partition wall material liquid at the time of forming the partition wall by the conventional screen printing method, and then uses this partition wall material liquid as it is. Instead, it was found that the liquid dripping itself could be eliminated by using the carrier by impregnating and holding it, and as a result of further research on this desirable carrier, the present invention was completed.

According to the present invention, as a means for achieving the above object, a porous sheet impregnated with a partition raw material liquid is placed on the fine pattern forming surface of the mold according to claim 1, and a glass plate is further placed thereon. A second step of heating while pressing, a second step of removing the mold, and firing the remaining glass plate and porous sheet at a temperature at which the porous sheet can be removed by burning. The present invention provides a method for manufacturing a display panel substrate, comprising:

According to the present invention, as a means for achieving the above-mentioned object, in the first step of claim 2, a porous sheet impregnated with a partition wall raw material liquid is placed on a glass plate, and a molding die is placed thereon. 2. The method for manufacturing a display panel substrate according to claim 1, wherein the formation surfaces of the fine patterns are overlapped.

Further, the present invention provides a method for manufacturing a display panel substrate according to claim 1 or 2, which is a plasma display panel substrate according to claim 3 as means for achieving the above object.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a display panel substrate according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic front view for explaining the manufacturing method of the present invention, and FIG. 2 is a schematic front view for explaining the manufacturing method of the present invention and a schematic front view of a display panel substrate. is there.

In the first step, first, the porous sheet 20 impregnated with the partition raw material liquid is placed on the surface of the mold 6 on which the fine pattern 50 is formed, and then the glass sheet 30 is further placed on the porous sheet 20. Put on each other. At this time, since the partition wall raw material liquid is impregnated and held in the porous sheet 20, no liquid dripping occurs during the operation and the handling is easy.

The molding die 6 is a master die, and its material is not particularly limited as long as it can form the fine pattern 50. The fine pattern 50 is for forming a partition of a target display panel substrate, and the pattern of the partition forms an inverted image of unevenness. The fine pattern 50 of the molding die 6 has a stripe shape or a lattice shape,
An example of the dimensions is a stripe-shaped one having a width of 60 μm, a depth of 200 μm, and an interval of about 160 μm. In order to improve the releasability, a plating layer in which submicron fluororesin particles are dispersed is coated on the surface of the mold 6 by, for example, electroless nickel-PTFE dispersion by Hikifune Co., Ltd. or Osaka Gas Chemical Co., Ltd. Plating can be applied.

The porous sheet 20 has the function of assisting the transfer of the fine pattern 50 of the molding die 6 by the impregnating raw material liquid impregnated therein and finally forming the partition. Therefore, in order to perform this transfer satisfactorily, those having pores of such a degree that they can impregnate and hold only the partition wall material liquid necessary for the transfer, preferably those having the pores dispersed uniformly. Basically, any material may be used. Further, in order to facilitate the transfer of the fine pattern 50, it is preferable that the pattern is as thin as possible. Examples of such a porous sheet 20 include paper, synthetic paper, plastic films and sheets, plastic foam,
Cloths and nonwoven fabrics can be mentioned. As a preferable example, a sheet for nonwoven fabric of ultrahigh molecular weight polyethylene can be used.

The partition wall material liquid to be impregnated into the porous sheet 20 is not particularly limited as long as it has permeability and nonflammability enough to be impregnated, and can be cured to form a partition wall. Absent. As such a partition wall raw material liquid, a product name HEAT for forming a silicon-containing polymer is used.
LESS GLASS GS-600 series (Homer Technology Co., Ltd.), polysilazanes such as perhydropolysilazane, for example, trade name Tonen polysilazane (Tonen Corporation), trade name of inorganic binder Red Proof MR-10 series (Ltd.) Thermal research), and conventionally used glass pastes. Since the partition wall material liquid is to be a partition wall,
If necessary, a dark colorant such as black can be blended so as to be advantageous in obtaining the contrast of the display panel.

As a method for impregnating the porous sheet 20 with the partition wall raw material liquid, a method of immersing the porous sheet in the partition wall raw material liquid, a method of applying the partition wall raw material liquid to the porous sheet, and the like can be applied.

The glass plate 30 can be used as the rear glass substrate 3 as it is. The glass plate 30 supports the porous sheet 20 at the time of manufacturing to improve workability.

Next, in the second step, heating is performed while pressing. By this pressing, the porous sheet 20 is pressed against the fine pattern 50 of the mold 6 and the fine pattern 5
Deforms corresponding to 0 shape. At the same time, since the partition wall raw material liquid impregnated in the porous sheet 20 is cured by heating,
The deformation is kept as it is, and the fine pattern 50 is transferred to the porous sheet 20 in an inverted state. At this time,
The porous sheet 20 containing the hardened partition wall material liquid is also in close contact with the glass plate 30. In this step, in order to make the work of removing the molding die 6 in the next step easier, the curing can be stopped to the extent that the unevenness of the fine pattern 50 can be maintained without completing the curing.

As the pressing and heating means, for example, as shown in FIG. 1, a heat press P comprising a fixed plate P1 and a movable plate P2 which can be moved in the vertical direction can be used. That is, the molding die 6, the porous sheet 20, and the glass plate 30 are placed on the fixed plate P1 in this order, and the movable plate P2 is lowered and pressed against the glass substrate while being heated while being pressed. At this time, a combination of the forming die 6, the porous sheet 20, and the glass plate 30 in advance can be placed on the fixing plate P1, or the glass plate 30, the porous sheet 20, and the forming die 6 can be fixed in this order. Board P
1 can also be placed. After heating, this time the movable platen P
The mold 2, the porous sheet 20 and the glass plate 30 are taken out by raising 2. In order to ensure a uniform pressing state in this pressing operation, a cushion material having good heat conductivity may be interposed between the fixed board P1 and the movable board P2.

This pressing force depends on the type of the porous sheet 20,
The thickness differs depending on the impregnation amount and type of the partition wall raw material liquid, and is determined by comprehensively considering these factors. The heating condition is determined according to the type and amount of the partition wall raw material liquid impregnated in the porous sheet 20.

Next, in a third step, the mold 6 is detached, and the remaining glass plate 30 and the porous sheet 20 are fired at a temperature at which the porous sheet 20 can be burned off. By firing in this manner, only the organic porous sheet 20 is burned and volatilized and removed. In this way, as shown in FIG.
The display panel substrate 10 including the partition wall 2 having the transferred fine pattern 51 and the glass substrate 3 supporting the partition wall 2 can be obtained.

The display panel substrate 10 thus obtained is obtained by attaching address electrodes, applying a fluorescent material, etc. in a conventional manner to obtain a desired display panel such as a plasma display panel. be able to.

[0023]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto.

Example 1 By applying the manufacturing method of the present invention, a substrate for a plasma display panel having striped partition walls as shown in FIG. 3 was manufactured. Hereinafter, description will be made with reference to FIGS. First, a metal mold 6 having a fine pattern 50 having a width of 60 μm, a height of 200 μm, and an interval of 160 μm was prepared and placed on a fixed plate P1 of a heat press P. Next, on the surface of the metal mold 6 on which the fine patterns 50 are formed, a porous sheet 20 of a 150 μm-thick ultra-high molecular weight polyethylene nonwoven fabric sheet is used as a partition wall raw material liquid HEA.
The one impregnated with TTLESS GLASS (GS-600-1; containing isopropyl alcohol as diluent) was placed. Thereafter, a glass plate 30 serving as a substrate was placed on the application surface. In addition, the above-mentioned impregnation processing is performed by HEATL.
This was performed by applying ESS GLASS to a nonwoven fabric sheet. Next, the movable platen P2 of the heat press machine was lowered, and was pressed against the glass plate 30 to about 15 g / cm.
While applying the pressure of ² , heating and holding at about 130 ° C. for about 20 to 30 minutes cured the HEATLESS GLASS. After the curing was completed, the movable platen P2 was raised, the metal mold 6 was detached, and a precursor for a display panel substrate as shown in FIG. 2 was obtained. Thereafter, this is placed in a heating furnace, and is held at about 500 ° C. for about 30 minutes, and the nonwoven fabric sheet is burned and removed. As shown in FIG. 2, a display panel substrate 10 having a partition wall 2 and a glass substrate 3 is provided. I got When the surface of the display panel substrate 10 was observed with a microscope, the fine pattern 5 of the metal mold 6 was observed.
0 is reversed and transferred as it is, width 60 μm, height 20
It was confirmed that the partition walls 2 having a fine pattern 51 of 0 μm and a spacing of 160 μm were formed.

[0025]

According to the production method of the present invention, the raw material for partition walls, which is usually easily dripped, is impregnated and held in the porous sheet. For this reason, not only the occurrence of the problem due to the liquid dripping can be completely prevented, but also the handling is easy, so that the workability can be remarkably improved. Further, the processing time can be shortened, so that the manufacturing cost can be reduced. By applying the manufacturing method of the present invention, fine patterning of the partition wall can be achieved, so that a display panel substrate applied to a high-quality plasma display panel or the like can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic front view for explaining a manufacturing method of the present invention.

FIG. 2 is a schematic front view for explaining the manufacturing method of the present invention.

FIG. 3 is a schematic perspective view showing a structural example of a plasma display panel.

[Explanation of symbols]

 2 Partition wall 3 Glass substrate 6 Mold 10 Display panel substrate 20 Porous sheet 30 Glass plate 50 Fine pattern 51 Fine pattern

[Procedure amendment]

[Submission date] August 18, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

The porous sheet 20 has the function of assisting the transfer of the fine pattern 50 of the molding die 6 by the impregnating raw material liquid impregnated therein and finally forming the partition. Therefore, in order to perform this transfer satisfactorily, those having pores of such a degree that they can impregnate and hold only the partition wall material liquid necessary for the transfer, preferably those having the pores dispersed uniformly. Basically, any material may be used. Further, in order to facilitate the transfer of the fine pattern 50, it is preferable that the pattern is as thin as possible. Examples of such a porous sheet 20 include paper, synthetic paper, plastic films and sheets, plastic foam,
Cloths and nonwoven fabrics can be mentioned. As a preferable one, a nonwoven fabric-like sheet of ultrahigh molecular weight polyethylene can be used.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

Example 1 By applying the manufacturing method of the present invention, a substrate for a plasma display panel having striped partition walls as shown in FIG. 3 was manufactured. Hereinafter, description will be made with reference to FIGS. First, a metal mold 6 having a fine pattern 50 having a width of 60 μm, a height of 200 μm, and an interval of 160 μm was prepared and placed on a fixed plate P1 of a heat press P. Next, on the surface of the metal mold 6 on which the fine patterns 50 are formed, a nonwoven fabric-like sheet of ultra-high molecular weight polyethylene having a thickness of 150 μm, which is a porous sheet 20,
The one impregnated with TTLESS GLASS (GS-600-1; containing isopropyl alcohol as diluent) was placed. Thereafter, a glass plate 30 serving as a substrate was placed on the application surface. In addition, the above-mentioned impregnation processing is performed by HEATL.
The test was performed by applying ESS GLASS to a nonwoven fabric-like sheet. Next, the movable platen P2 of the heat press machine was lowered, and was pressed against the glass plate 30 to about 15 g / cm.
While applying the pressure of ² , heating and holding at about 130 ° C. for about 20 to 30 minutes cured the HEATLESS GLASS. After the curing was completed, the movable platen P2 was raised, the metal mold 6 was detached, and a precursor for a display panel substrate as shown in FIG. 2 was obtained. Thereafter, this is placed in a heating furnace and held at about 500 ° C. for about 30 minutes, and the nonwoven fabric-like sheet is removed by burning. As shown in FIG. I got When the surface of the display panel substrate 10 was observed with a microscope, the fine pattern 5 of the metal mold 6 was observed.
0 is reversed and transferred as it is, width 60 μm, height 20
It was confirmed that the partition walls 2 having a fine pattern 51 of 0 μm and a spacing of 160 μm were formed. ────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] August 27, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

The partition C is provided to prevent crosstalk of light and to provide a contrast of a screen, and is very fine. For example, in the case of a stripe, a width of about 30 μm and a height of about 200 μm
Therefore, it is required to form the entire surface of the panel at intervals of about 100 μm. Then, a phosphor is applied to the inside of the partition C having such fine dimensions, and Ne, X
An inert gas such as e is sealed. Therefore, from the viewpoint of obtaining a complicated and clear image, the fine pattern required for the partition wall C is of course required, the coating amount of the phosphor is made constant, and the leakage of the inert gas is prevented by being in close contact with the front panel A. From the viewpoint and the like, the dimensional accuracy of the partition wall C is required to be high.

Claims (3)

[Claims] 1. A first step in which a porous sheet impregnated with a partition wall raw material liquid is placed on a surface on which a fine pattern of a mold is formed, and a glass plate is further placed thereon, and a second step of heating while pressing. A method for manufacturing a display panel substrate, comprising: a step of removing a mold and baking the remaining glass substrate and porous sheet at a temperature at which the porous sheet can be removed by burning. 2. The display panel according to claim 1, wherein in the first step, a porous sheet impregnated with a partition wall raw material liquid is placed on a glass plate, and a surface on which a fine pattern of a mold is formed is placed thereon. Method of manufacturing substrates. 3. The method for manufacturing a display panel substrate according to claim 1, wherein the display panel is a plasma display panel.