KR100525891B1 - dry film resist for barrier-rib formation and method for manufacturing a lower substrate in the plasma display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and in particular, by using a dry film resist pattern containing an antistatic agent, a plasma display can be formed with a higher definition of partition walls in the vicinity of a gap and to remove stains generated near the gap. It relates to a method of manufacturing a lower plate of the panel.

According to an embodiment of the present invention, a method of manufacturing a lower panel of a plasma display panel includes: forming a lower plate electrode divided into upper and lower parts on a substrate, and forming a white bag on a substrate on which the lower plate electrode is formed; Forming a barrier rib by applying a barrier forming paste on the barrier rib, forming a dry film resist pattern to which an antistatic agent is added, and sand blasting the dry film resist pattern as a mask. And applying a phosphor along the inner surface of the partition wall.

Description

Dry film resist for barrier-rib formation and method for manufacturing a lower substrate in the plasma display panel}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and in particular, by using a dry film resist pattern containing an antistatic agent, a plasma display can be formed with a higher definition of partition walls in the vicinity of a gap and to remove stains generated near the gap. It relates to a method of manufacturing a lower plate of the panel.

Plasma display panels are in the spotlight as next generation display devices having the highest practicality among flat panel display devices. That is, the plasma display panel has high brightness and a wide viewing angle, and thus has wide applicability as a large, thin display such as an outdoor advertising tower, a wall-mounted TV, or a theater display.

In general, a plasma display panel is a display device using visible light emitted by irradiating ultraviolet light generated by discharge of an inert gas enclosed in a discharge cell to a phosphor.

At present, the plasma display panel is gradually larger and is now commercialized to 50 inches and 60 inches, including 40 inches. However, such a large screen plasma display panel has a lot of difficulties in driving as the screen to be driven is larger. In order to facilitate the driving of the large-screen plasma display panel, a dual scan driving method is proposed in which the lower electrode is divided and driven separately.

1 is a layout view of an electrode of a plasma display panel in which a lower plate electrode is conventionally divided.

As shown in FIG. 1, a conventional plasma display panel has been proposed in which a lower electrode (for example, an address electrode) is divided into an upper lower electrode 10a and a lower lower electrode 10b and disposed on the panel.

In other words, instead of arranging the scan electrodes 11, the common electrodes 12, and the partitions 13 and 13 'as in the related art, the lower electrode to which the data signal is applied is disposed between the predetermined gaps 15 in the center line of the panel. The lower lower electrode 10a and the lower lower electrode 10b are disposed to be separated from each other. In this case, the partitions 13 and 13 ′ may be formed in a stripe type.

However, when the plasma display panel is driven when the lower electrode is divided into upper and lower parts, a center separation line appears due to a difference between the phosphor coating area and the discharge space in the vicinity of the gap 15.

In the case of forming a partition wall by using sand blasting, such a center separation line is formed such that the lower width of the partition wall near the gap is wider than the lower width of the partition wall by the static electricity generated near the gap 15. This is generated when the application area and the discharge space of the phosphor coated on the inner wall of the partition become smaller than the discharge cells of other parts.

Hereinafter, by looking at the method of manufacturing the lower plate of the plasma display panel, it will be described why the center separation line appears more clearly.

2A to 2H show step by step manufacturing of a general plasma display panel.

First, a glass substrate 21 for manufacturing a lower plate is prepared, and a whiteback forming paste 22 is applied, printed or coated on the glass substrate 21 (FIG. 2A). At this time, before applying the white back forming paste 22, a lower plate electrode (eg, an address electrode) divided up and down on the glass substrate 21 by using a printing method, an additive method, a photosensitive paste, or the like. (A) and 10b) are preferably formed.

Subsequently, the white bag 22 is formed by drying and baking the white bag forming paste 22 (FIG. 2B). In this case, the white bag 22 may be formed using any one of a printing method and a coating method. Here, the white back 22 refers to a reflective film or an insulating film. The white back 22 protects the lower electrode during discharge, reflects visible light to improve luminous efficiency, and serves as an insulator for preventing the lower electrode from shorting. Will be The white bag forming paste 22 for forming the white bag 22 is made of powder, resin, solvent, or the like. In this case, the composition of the white bag forming paste is about 70% by weight of the powder, and the resin and the solvent are mixed in a proportion of 30% by weight. At this time, the composition ratio of the resin occupies approximately 2 to 3% by weight. Powders, resins, and the like can be used in various materials depending on their purpose. These materials are already well known techniques and further description thereof is omitted.

As shown in FIG. 2C, the barrier rib forming paste 23 is applied, printed or coated on the white bag 22 formed on the glass substrate 21 to have a predetermined barrier height. At this time, the partition forming paste 23 may be applied, printed or coated using any one of a printing or a coating method. Here, the partition 23 is formed with a resin for facilitating adhesion of the powder made of parent glass (PbO-SiO 2 -Al 2 O 3), filler (Al 2 O 3), pigment (TiO 2), and the glass substrate or white bag, and The solvent and the like are mixed.

Subsequently, a dry film resist (DFR: Dry Film Resist) is formed on the barrier rib-forming paste 23 using a laminating technique. Thereafter, the dry film resist is patterned through an exposure and development process to form a dry film resist pattern 24 (FIG. 2D).

As shown in Fig. 2E, the partitions 13 and 13 'are formed by sand blasting using the dry film resist pattern 24 as a mask.

When the partitions 13 and 13 'are formed, the dry film resist pattern 24 is peeled off by a wet process using a stripping solution, that is, an aqueous alkali solution such as NaOH or the like (FIG. 2F).

Next, the partitions 13 and 13 'formed on the glass substrate 21 are fired (2g).

Subsequently, the lower plate is manufactured by applying the phosphor 25 along the inner walls of the partitions 13 and 13 'using a printing method or the like (2h).

However, when fabricating a lower plate in the plasma display panel in which the lower electrodes 10a and 10b are divided into upper and lower sides, when the partition wall is formed by sand blasting, the upper lower electrode 10a is shown in FIG. 3. Static electricity is generated due to the abrasive (Al 2 O 3, SiC, glass fine particles, etc.) used in the sand blast near the gap 15 between the lower lower electrode 10b and the lower lower electrode 10b. By such static electricity, the barrier rib forming paste 23 present in the vicinity of the gap 15 is hardly removed.

Thus, the inner wall 17 of the partitions 13, 13 ′ near the gap 15 is inclined much more than the inner wall 17 ′ of the partitions 13, 13 ′ away from the gap 15. It will form slowly. Thus, the gentler inclination of the inner walls 17 of the partitions 13 and 13 'near the gap 15 means that the partition forming paste 23 is not removed. Accordingly, the lower width Wa of the partitions 13 and 13 'in the vicinity where the gap 15 is located becomes much wider than the lower width Wb of the partition wall not otherwise.

As a result, the discharge space of the discharge cells in the vicinity where the gap 15 formed between the upper lower electrode 10a and the lower lower electrode 10b is located becomes smaller than the discharge space of the other discharge cells, and the gap 15 The application area of the phosphors applied in the discharge cells in the vicinity of this position is such that the lower width Wa of the partitions 13 and 13 'becomes wider so that the application area becomes narrower, so that the phosphors applied inside the other discharge cells. It becomes narrower than the application area of.

When the plasma display panel is driven, the center separation line due to the difference in the coating area and the discharge space of the phosphor is displayed on the screen centering on the discharge cells in the vicinity of the gap. Such a center dividing line appears in the form of a band, and when the image is actually displayed, it appears as a stain on the screen, which is an important factor that may cause discomfort to viewers.

Conventionally, sand blasting is performed for a longer time when forming a partition wall so that a central separation line such as staining does not occur, so that the lower wall width Wa of the vicinity of the gap is equal to the lower wall width Wb of another portion. However, as a result of the long sand blasting, the inner wall of the partition near the gap is severely undercut, and when the sand blast is severe, the partition may be cut off or separated from the substrate.

Accordingly, an object of the present invention is to provide a dry film resist pattern containing an antistatic agent capable of suppressing the static electricity generated when the partition wall is formed.

The present invention provides a method for manufacturing a lower panel of a plasma display panel by using a dry film resist pattern containing an antistatic agent to form a partition wall near a gap more accurately and to remove stains generated near the gap. There is another purpose.

In order to achieve the above object, the present invention provides a dual scan drive type plasma display panel in which a lower electrode is divided and separately driven to facilitate driving of a large screen plasma display panel. An antistatic agent is added to the dry film resist pattern for patterning.

Here, the antistatic agent is characterized in that added to less than 1% by weight.

Here, the antistatic agent is characterized by consisting of any one of a fatty acid ester or an ethoxylated amine.

According to another aspect of the present invention, there is provided a method of manufacturing a lower panel of a plasma display panel, the method comprising: forming a lower plate electrode divided up and down on a substrate, and forming a white back on the substrate on which the lower plate electrode is formed; Applying a barrier forming paste on the formed white back, forming a dry film resist pattern to which an antistatic agent is added on the barrier forming paste, and sand blasting using the dry film resist pattern as a mask Forming a partition wall and applying a phosphor along the inner surface of the partition wall.

Here, the antistatic agent is characterized in that added to less than 1% by weight.

Here, the antistatic agent is characterized by consisting of any one of a fatty acid ester or an ethoxylated amine.

Here, when the partition wall is formed by the antistatic agent, the static electricity generated in the vicinity of the gap between the upper and lower lower electrode is characterized in that it is suppressed.

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

Figure 2a to 2h is a view showing a step of manufacturing a lower plate of a plasma display panel in general, since it has the same procedure as the lower plate manufacturing process of the plasma display panel according to the present invention, the present invention through the above 2a to 2h The lower plate manufacturing method of the plasma display panel according to the present invention will be described together.

As shown in the figure, in the method for manufacturing a lower plate of the plasma display panel according to the present invention, first, a glass substrate 21 for manufacturing the lower plate is provided, and a white back forming paste is formed on the glass substrate 21. 22 is applied, printed or coated (FIG. 2A). At this time, before applying the white back forming paste 22, a lower electrode (eg, an address electrode) divided up and down on the glass substrate 21 by using a printing method, an additive method, a photosensitive paste, or the like. (A) and 10b) are preferably formed.

Then, the white bag 22 is formed by drying and baking the white bag forming paste 22 (Fig. 2B). In this case, the white bag 22 may be formed using any one of a printing method and a coating method. In this case, the composition of the white bag forming paste is about 70% by weight of the powder, and the resin and the solvent are mixed in a proportion of 30% by weight. At this time, the composition ratio of the resin occupies approximately 2 to 3% by weight. Powders, resins, and the like can be used in various materials depending on their purpose.

As shown in FIG. 2C, the barrier rib forming paste 23 is applied, printed or coated on the white bag 22 formed on the glass substrate 21 to have a predetermined barrier height.

At this time, the partition forming paste 23 may be applied, printed or coated using any one of a printing or a coating method.

Here, the partition 23 is formed of 65 to 75% by weight of the powder, 4 to 15% by weight of the resin and 25 to 35% by weight of the solvent.

Subsequently, a dry film resist (DFR: Dry Film Resist) having an antistatic agent added to 1% by weight or less is formed on the partition forming paste 23 using a laminating technique.

Thereafter, the dry film resist is patterned through an exposure and development process to form a dry film resist pattern 24 (FIG. 2D).

As shown in Fig. 2E, the partitions 13 and 13 'are formed by sand blasting using the dry film resist pattern 24 as a mask.

At this time, as shown in FIG. 4, the electrostatic cell does not occur near the gap 15 between the lower electrodes 10a and 10b divided up and down by the antistatic agent added to the dry film resist 23.

As a result, the partitions 13 and 13 'are formed such that the lower width Wb of the partitions 13 and 13' in other portions near the gap 15 or near the gap 15 is kept constant. .

That is, since the static electricity is suppressed by the antistatic agent in the vicinity of the gap 15, the partition wall can be formed in the same manner as the partition wall formed by the general sand blast regardless of whether the lower plate electrodes 10a and 10b are divided. .

Accordingly, the inclination of the inner wall 37 of the partitions 13 and 13 'is maintained constant along the partition wall direction. As a result, the coating area of the phosphor applied to the inner wall 37 is the same for each discharge cell, and the area of the discharge space is the same, so that the luminance difference does not occur for each discharge cell. Will not be.

On the other hand, when the partitions 13 and 13 'are formed, the dry film resist pattern 24 is peeled off by a wet process using a stripping solution, that is, an aqueous alkali solution such as NaOH (FIG. 2F).

Next, the partitions 13 and 13 'formed on the glass substrate 21 are fired (2g).

Subsequently, the lower plate is manufactured by applying the phosphor 25 along the inner walls of the partitions 13 and 13 'using a printing method or the like (2h).

The present invention as described above is to add an antistatic agent of less than 1% by weight to the dry film resist pattern 24 for patterning the partition forming paste, the antistatic agent for the purpose of suppressing the static electricity generated when forming the partition As the substance to be added, it is preferably made of either fatty acid ester (Fatty Acid Ester) or ethoxylated amine (Ethoxylated Amine).

That is, fatty acid esters or ethoxylated amines are widely used for suppressing static electricity, and are added to the partition forming pastes applied at the time of forming the partition walls of the present invention, whereby sandblasting is applied to the abrasives to remove unnecessary parts. In the case of removing the partition forming paste, the static electricity generated in the vicinity of the gap between the upper and lower lower electrode electrodes can be suppressed.

As a result, the partition wall forming paste corresponding to an unnecessary portion in the vicinity of the gap can be easily removed in the vicinity of the gap, so that the partition wall can be formed with high definition along the partition wall direction.

The lower plate of the plasma display panel may be applied at the time of manufacture by using the partition-forming paste made of the above composition.

Accordingly, by forming the partition wall simply by using the partition formation paste to which an antistatic agent of 1% by weight or less is added, it is possible to prevent the center separation line such as the stain generated in the gap between the lower plate electrodes separated up and down.

The present invention has the following effects.

First, the present invention is to contain a small amount of an antistatic agent in the dry film resist pattern for patterning the dry film resist for forming the partition wall, thereby suppressing the static electricity generated in the gap between the upper and lower bottom electrode when forming the partition wall There is.

Secondly, in the method of manufacturing a lower panel of the plasma display panel of the present invention, by forming a partition wall using a dry film resist pattern containing an antistatic agent, the generation of static electricity is suppressed at the source to close the gap between the upper and lower lower electrode electrodes. The barrier ribs are formed at a fixed lower width to prevent center separation lines such as stains, thereby enabling viewers to watch higher definition images.

Third, the present invention suppresses the static electricity in the vicinity of the gap, so that the partition forming paste in the vicinity of the gap is more easily removed, thereby eliminating the need for long sand blasting in the vicinity of the gap, whereby the partition is removed from the substrate as in the prior art. It is possible to prevent the departure from the original and also to effect the productivity is improved by shortening the process time by not performing the sandblast for a long time.

1 is a layout view of electrodes of a plasma display panel in which a lower electrode is conventionally divided;

2A to 2H are diagrams showing step by step manufacturing methods of a general plasma display panel.

FIG. 3 is a view illustrating a partition wall formed by static electricity generated near a gap in the plasma display panel of FIG. 1. FIG.

4 is a view showing a partition wall formed when the static electricity generated in the vicinity of the gap in the plasma display panel according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10a: upper lower electrode 10b: lower lower electrode

11: scan electrode 12: common electrode

13,13 ': bulkhead 15: gap

21: glass substrate 22: white bag

23: bulkhead paste 24: dry film resist

25: phosphor

Claims (7)

In the dual scan drive type plasma display panel in which the lower electrode of the plasma display panel is divided into upper and lower parts so that the upper and lower lower electrode are driven separately, the dry film resist for patterning the partition wall of the lower electrode. An antistatic agent comprising any one of a fatty acid ester or an ethoxylated amine is added to the dry film resist pattern. The dry film resist for barrier rib formation according to claim 1, wherein the antistatic agent is added to the dry film resist for barrier rib formation at 1% by weight or less. delete Forming a lower electrode divided up and down on a substrate; Forming a white back on the substrate on which the lower electrode is formed; Applying a partition forming paste on the formed white bag; Forming a dry film resist pattern on which the antistatic agent made of any one of a fatty acid ester and an ethoxylated amine is added, on the partition forming paste; Sand blasting the dry film resist pattern as a mask to form a partition wall; And Applying a phosphor along the inner surface of the partition wall; The lower plate manufacturing method of the plasma display panel comprising a. The method of claim 4, wherein the antistatic agent is added to the dry film resist for forming the partition wall by less than 1% by weight. delete The method according to claim 4, wherein the static electricity generated in the vicinity of the gap between the upper and lower divided electrode when the partition wall is formed by the antistatic agent is suppressed.