KR100738221B1 - Plasma Display Panel and Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to a method for manufacturing partition walls of a plasma display panel.

In the method of manufacturing a plasma display panel according to the present invention, (a) forming a coating film on the dielectric formed on the glass, (b) placing a photomask having a different width in the column direction and the row direction on the coating film, Forming patterns of the barrier ribs and the column barrier ribs, and (c) etching the patterns of the row barrier ribs and the column barrier ribs to form row barrier ribs and column barrier ribs having different heights.

In addition, the plasma display panel according to the present invention is characterized in that it comprises a partition formed by the manufacturing method.

Accordingly, in the method of manufacturing a plasma display panel, the number of barrier rib manufacturing processes is achieved by forming barrier ribs having different heights using one exposure and isotropic etching with different mask pattern widths in row and column directions, respectively. This reduces the manufacturing cost of the plasma display panel.

In the plasma display panel manufacturing method, when the green sheet is used, the thickness of the partition wall can be uniformly controlled, thereby improving the uniformity of the plasma display panel.

Description

Plasma Display Panel and Manufacturing Method Thereof

1 is a view showing the structure of a typical plasma display panel.

2 to 4 is a view showing a partition structure of a conventional plasma display panel.

5A through 5E are diagrams sequentially illustrating a method of manufacturing a partition wall of a plasma display panel according to the present invention.

6 is a view sequentially showing a manufacturing method of a plasma display panel according to the present invention;

7A to 7C are diagrams sequentially illustrating a method of manufacturing a partition wall of a plasma display panel according to the present invention.

8 illustrates a green sheet of a plasma display panel according to the present invention;

9A to 9C are views illustrating a method of manufacturing a partition green sheet for a plasma display panel according to the present invention.

<Explanation of symbols for the main parts of the drawings>

700: rear glass 710: partition paste

711: dry film resin 712a: low-direction pattern

712b: pattern in column direction 712: photo mask

730: lower dielectric layer

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel manufacturing method capable of reducing the manufacturing cost of the plasma display panel by reducing the number of manufacturing processes of the partition wall by improving the manufacturing method of the partition wall and formed with such a manufacturing method. The present invention relates to a plasma display panel including a partition wall.

In general, a plasma display panel is a partition wall formed between a front panel and a rear panel to form one unit cell, and each cell includes neon (Ne), helium (He), or a mixture of neon and helium (Ne + He). An inert gas containing a main discharge gas such as and a small amount of xenon is filled. When discharged by a high frequency voltage, the inert gas generates vacuum ultraviolet rays and emits phosphors formed between the partition walls to realize an image. Such a plasma display panel has a spotlight as a next generation display device because of its thin and light configuration.

1 illustrates a structure of a general plasma display panel.

As shown in FIG. 1, a plasma display panel includes a front panel in which a plurality of sustain electrode pairs formed by pairing a scan electrode 102 and a sustain electrode 103 are arranged on a front glass 101 that is a display surface on which an image is displayed. A rear panel 110 having a plurality of address electrodes 113 arranged so as to intersect the plurality of sustain electrode pairs on the back glass 111 forming the back surface 100 and the rear surface is coupled in parallel with a predetermined distance therebetween. .

The front panel 100 is a bus made of a scan material 102 and a sustain electrode 103, that is, a transparent electrode a made of a transparent material and a metal material to mutually discharge and maintain light emission of the cells in one discharge cell. The scan electrode 102 and the sustain electrode 103 provided as the electrodes b are included in pairs. The scan electrode 102 and the sustain electrode 103 are covered by a dielectric layer 104 which limits the discharge current and insulates the electrode pairs, and the upper surface of the upper dielectric layer 104 is magnesium oxide to facilitate the discharge conditions. A protective layer 105 on which (MgO) is deposited is formed.

The rear panel 110 has an address electrode 113 arranged in a direction crossing the scan electrode 102 and the sustain electrode 103 arranged in parallel on the top glass 101 on the rear glass 111. The lower dielectric layer 115 is formed on the electrode 113. In addition, a partition wall 112 is formed on the lower dielectric layer 115 to partition the discharge cells, and a fluorescent layer 114 is applied to the discharge cell space to discharge R (red), G (green), and B (blue). Visible light having any one color is generated.

On the other hand, in the conventional plasma display panel having such a structure, the partition wall 112 for forming a plurality of discharge spaces, that is, the discharge cells on the rear panel has a stripe type and a well type according to the structure. Divided. The partition wall 112 has various designs in consideration of brightness characteristics, exhaust characteristics, phosphor coating area, and the like.

2 to 4 illustrate a partition structure of a conventional plasma display panel.

FIG. 2 is a stripe type structure in which the partition walls 112 formed on the lower dielectric layer 115 on the rear glass 111 are arranged in a row. The partition walls 112 are scan electrodes (not shown) formed of a bus electrode and a transparent electrode. ) And a sustain electrode (not shown). In this stripe type barrier rib structure, the bus electrode is exposed on the discharge space to facilitate interaction with the address electrode 113 of the rear glass 111 and the manufacturing process is simple. However, there is a disadvantage in that visible light generated at the time of discharge is leaked in the stripe direction of the partition wall, and phosphor printing and exhausting are easy, but there is a disadvantage in that the luminescence efficiency is not high due to the small discharge area and phosphor coating area affecting adjacent cells.

Meanwhile, FIG. 3 is a well type structure in which the partition wall 112 formed on the lower dielectric layer 115 on the rear glass 111 has a lattice shape, and as shown, the partition wall 112 is formed of a bus electrode. Scan electrodes (not shown) and sustain electrodes (not shown) made of transparent electrodes are arranged horizontally or vertically. The well-type barrier rib structure can increase luminance by increasing phosphor coating area of each discharge cell, and can prevent crosstalk in all directions, but the manufacturing process is difficult and the plasma display panel is difficult. There is a problem in that the impurity gas is not easily exhausted to the outside in the exhaust process of the manufacturing process.

In order to improve the exhaust characteristics of the well-type partition wall structure, as shown in FIG. 4, a difference in height is provided between the first partition wall 112a and the second partition wall 112b for partitioning the discharge cell to improve the exhaust characteristic. Now. Looking at the method of forming a well-type partition wall structure having such a height difference is as follows.

5A through 5E are diagrams sequentially illustrating a method of manufacturing a partition wall of a plasma display panel according to the present invention.

First, as shown in FIG. 5A, a lower dielectric 115 is formed on a rear glass 111 on which an electrode (not shown) is mounted, and a partition paste 112 having a predetermined thickness is formed on the lower dielectric 115. It is formed by printing method or coating method. Thereafter, a dry film resin (hereinafter referred to as DFR) 120 is formed on the partition paste 112 through a laminating process, and a photo mask 121 having a predetermined pattern on the DFR 120. ), And an exposure step of irradiating light such as vacuum ultraviolet rays is performed.

Thereafter, as shown in FIG. 5B, after the DFR 120 exposure process, a development process is performed. The DFR 120 in the region not exposed to light by this developing process (hereinafter referred to as the 'unexposed region') remains on the partition paste 112, while the region exposed to light (hereinafter referred to as the 'exposed region'). DFR 120 is etched and removed.

Thereafter, as shown in FIG. 5C, the sand blasting apparatus 130 is positioned and driven on the partition paste 112 and the DFR 120 that have undergone the development process to spray sand particles onto the partition paste 112. At this time, the partition paste 112 is scraped due to the sputtering of the sand particles, while the paste 112 corresponding to the partition is protected by the DFR 120 pattern.

Thereafter, as illustrated in FIG. 5D, a separation process is performed on the partition wall formed by being protected by the DFR 120 to form the first partition wall 112a and the second partition wall 112b.

Meanwhile, the first and second barrier ribs 112a and 112b are formed by exposing a DFR on the barrier paste to expose the first barrier rib 112a and the second barrier rib 112b as shown in FIGS. 5A to 5D. Alternatively, the partition wall 112b may be formed, or alternatively, the partition wall paste may be formed by including a photosensitive material. The partition wall 112b may be formed on the dielectric layer using a green sheet, and then may be formed through the exposure process. The partition 112b may be formed.

Subsequently, as shown in FIG. 5E, the partition paste is formed on the second partition 112b by a predetermined height using a direct patterning method to form the first partition 112a and the second partition 112b having different heights. Form.

As described above, in fabricating a well type barrier rib structure having a height difference between the first barrier rib and the second barrier rib to improve the exhaust characteristics of the plasma display panel, the height of the first barrier rib and the second barrier rib as described above. In order to make a difference, the first barrier rib and the second barrier rib are first formed at the same height, and then the paste is applied to the second barrier rib and then exposed. There is a problem of deterioration.

In order to solve this problem, an object of the present invention is to provide a method of manufacturing a plasma display panel that can improve the manufacturing method of the partition wall of the plasma display panel, thereby reducing the number of manufacturing processes and improving the uniformity of the partition film.

The method of manufacturing a plasma display panel according to the present invention for achieving the above object comprises the steps of (a) forming a coating film on the dielectric formed on the glass, and (b) a width in a column direction and a row direction on the coating film. Placing a photo mask having a photomask, and forming a pattern of row barrier ribs and column barrier ribs, and (c) etching the patterns of row barrier ribs and column barrier ribs to form row barrier ribs and column barrier ribs having different heights.

The pattern width in the column direction is larger than the pattern width in the row direction.

The pattern width in the column direction is characterized by being wider than two times or more and three times less than the pattern width in the row direction.

The height of the column partition is higher than the height of the row partition.

The coating film is formed of any one of a partition paste and a green sheet.

The dry film of the green sheet is characterized by being formed of a plurality of layers.

The dry film layer is formed of a plurality of layers each having a different dielectric constant.

Among the plurality of dry film layers, the dry film layer forming the partition wall close to the display surface of the panel has a dark color.

In addition, the plasma display panel according to the present invention is characterized in that it comprises a partition formed by using the manufacturing method.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

6 is a view sequentially showing a method of manufacturing a plasma display panel according to the present invention.

As shown in FIG. 6, the method of manufacturing a plasma display panel according to the present invention includes an assembly process including a front panel manufacturing process listed on the left side of FIG. 6, a rear panel manufacturing process listed on the right side, and a sealing process listed below. .

First, referring to the manufacturing process of the front panel listed on the left side of FIG. 6, after preparing the front glass to be the substrate (600), a plurality of sustain electrodes are formed on the front glass (601). Thereafter, an upper dielectric layer is formed on the sustain electrode pair to limit the discharge current (602), and sputtering generated during plasma discharge on the upper dielectric layer prevents damage to the upper dielectric layer and oxidizes to increase emission efficiency of secondary electrons. A protective layer on which magnesium (MgO) is deposited is formed (603).

Meanwhile, referring to the manufacturing process of the rear panel listed on the right side of FIG. 6, similarly to the front panel, the rear glass, which is first described, is prepared (610), and a plurality of address electrodes are arranged on the rear glass so as to face the storage electrode formed on the front panel. It is formed (611). Subsequently, a lower dielectric layer is formed on the address electrode to accumulate wall charges (612), a barrier rib partitioning the discharge cells is formed on the lower dielectric layer (613), and a phosphor is coated on the discharge cells partitioned by the barrier ribs. A phosphor layer is formed (614).

The front panel and the rear panel manufactured as described above are bonded to each other (620) to form a plasma display panel (630).

Looking at the partition formation method according to the present invention in the plasma display panel manufactured as described above is as shown in Figs. 7a to 7c.

7A to 7C are diagrams sequentially illustrating a method of manufacturing a partition wall of a plasma display panel according to the present invention.

First, as shown in FIG. 7A, a lower dielectric 730 is formed on a rear glass 700 on which an electrode (not shown) is mounted, and a partition paste 710 having a predetermined thickness is formed on the lower dielectric 730. Is formed by a printing method or a coating method.

Thereafter, a dry film resin (hereinafter referred to as DFR) 711 is formed on the partition paste 710 through a laminating process, and the width of the pattern 712b in the column direction on the DFR 711 is increased. An exposure step of irradiating light such as vacuum ultraviolet rays by aligning the photomasks 712 having a pattern wider than the width of the pattern 712a in the row direction is performed. Here, the reason why the width of the pattern 712b in the column direction should be wider than the width of the pattern 712a in the row direction is to make a difference in height between the row partition wall and the column partition wall formed later. Preferably, the height of the column partition is formed higher than that of the row partition, which is a partition partitioning each pixel between the R, G, and B phosphors, thereby preventing intermixing between the phosphors, This is to improve the exhaust characteristics.

At this time, the width of the pattern 712b in the column direction is wider than two times or more and three times or less than the width of the pattern 712a in the row direction. Here, when the width of the pattern 712b in the column direction is not more than twice as wide as the width of the pattern 712a in the row direction, it is difficult to greatly improve the exhaust characteristics of the plasma display panel. If the width of the pattern 712b is more than three times wider than the width of the pattern 712a in the row direction, there is a risk that the mechanical strength of the row partition wall is lowered and collapses.

Thereafter, as shown in FIG. 7B, after the DFR 711 exposure process, the development and etching process is performed. The DFR 711 of an area not exposed to light by this developing process (hereinafter referred to as an 'unexposed area') remains on the partition paste 710, while an area exposed to light (an 'exposed area') DFR 711 is etched and removed.

After such a developing process, when the etchant is applied using an isotropic etching, the partition paste 712b in the wide column direction of the pattern is less etched than the pattern 712a in the narrow row direction, so that the pattern of the partition 712b is higher than that of the row partition. A column partition having a height is formed.

Subsequently, as illustrated in FIG. 7C, a stripping process is performed on the partition wall 710 that is protected by the DFR 711 to form row partition walls 710a and column partition walls 710b having different heights.

Meanwhile, the row barrier ribs and the column barrier ribs of the present invention may form row barrier ribs and column barrier ribs having different heights by forming a DFR on the barrier paste, as shown in FIGS. 7A to 7C, and expose the barrier ribs. The photosensitive material may be included in itself to form row barrier ribs and column barrier ribs having different heights through an exposure process, or may be formed using green sheets. In particular, when the row partitions and the column partitions having different heights are formed by using the green sheet, the thicknesses of the partition walls may be uniformly controlled, thereby improving the uniformity of the plasma display panel. Looking at the green sheet of the plasma display panel according to the present invention as follows.

8 is a view showing a green sheet of a plasma display panel according to the present invention.

As shown in FIG. 8, a base film 801 is formed at a lower portion thereof, a first dry film 802 is formed at an upper portion of the base film 801, and a dielectric different from that of the first dry film 802 is formed thereon. The second dry film 803 is formed of a material having a constant, and the cover film 804 is formed on the second dry film 803. As such, the reason why the first dry film 802 and the second dry film 803 are formed of materials having different dielectric constants is to reduce power consumption of the plasma display panel. In addition, the first dry film 802 of the first dry film 802 and the second dry film 803 is formed of a material having a darker color than the second dry film 803. This is because the contrast of the plasma display panel is improved when the first dry film is formed of a material having a dark color because the first dry film is a dry film layer forming a partition wall close to the display surface of the panel. Meanwhile, although the dry film is illustrated in two layers in FIG. 8, the dry film layer may be formed of two or more layers.

Looking at the process of forming a green sheet having such a structure as follows.

9A to 9C are views illustrating a method of manufacturing partition green sheets of a plasma display panel according to the present invention.

First, referring to FIG. 9A, the first dry film 802 for forming the partition wall is a PET material in which the first slurry 802a for partition wall coming from the coater 830 is formed on the conveyor belt 820. The base film 801 is applied to a certain thickness.

Thereafter, as shown in 9b, the first slurry 802a applied to the base film 801 is dried to form the first dry film 802, and then the second slurry 803a is applied to the upper portion thereof. When dried, a second dry film 803 is formed. At this time, the first slurry 802a and the second slurry 803a are formed of materials having different dielectric constants. This is because when the first slurry 802a and the second slurry 803a are formed of materials having different dielectric constants, power consumption when driving the plasma display panel is reduced. In addition, the first slurry has a darker color than the second slurry, which is a contrast of the plasma display panel because the first slurry forms the first dry film and the first dry film forms a partition wall close to the display surface of the panel. For improvement, the first slurry 802a has a darker color than the second slurry 803a.

Thereafter, as shown in 9c, when the cover film 804 is covered on the second dry film 803, the final green sheet 800 is formed.

In the case of forming the partition wall using the green sheet, partition walls having different heights may be formed by the method described above with reference to FIGS. 7A to 7C.

Therefore, the plasma display panel according to the present invention uses a partition paste or a green sheet to form partitions having different heights formed through a single exposure and etching process by varying the width of the pattern in the row direction and the pattern mask in the column direction. It is characterized by including.

In this way, the width of the pattern mask is different from the width of the row partition and the pattern width of the column partition to form partitions having different heights in one exposure process, thereby reducing the number of manufacturing steps of the partition walls, thereby reducing the manufacturing cost of the plasma display panel. Will be lowered.

In the plasma display panel manufacturing method, when the green sheet is used, the barrier film can be uniformly controlled, thereby improving the uniformity of the plasma display panel.

As described above, the technical configuration of the present invention can be understood by those skilled in the art that the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and their All changes or modifications derived from equivalent concepts should be construed as being included in the scope of the present invention.

As described above, in the method of manufacturing a plasma display panel, the barrier ribs are manufactured by forming barrier ribs having different heights by using one exposure and isotropic etching with different mask pattern widths in row and column directions, respectively. The manufacturing cost of the plasma display panel is reduced by reducing the number of processes.

In the plasma display panel manufacturing method, when the green sheet is used, the thickness of the partition wall can be uniformly controlled, thereby improving the uniformity of the plasma display panel.

Claims (9)

(a) forming a coating film on the dielectric formed on the glass; (b) forming a pattern of a row barrier rib and a column barrier rib by placing a photomask having a width different from each other in a column direction and a row direction on the coating layer; And (c) etching the patterns of the row barrier ribs and the column barrier ribs to form row barrier ribs and column barrier ribs having different heights; Method of manufacturing a plasma display panel comprising a. The method of claim 1, And the pattern width in the column direction is wider than the pattern width in the row direction. The method of claim 2, And the pattern width in the column direction is wider than two times and three times less than the pattern width in the row direction. The method of claim 1, And a height of the column partition wall is higher than a height of the row partition wall. The method of claim 1, The coating film is a plasma display panel manufacturing method, characterized in that formed by any one of the barrier paste, the green sheet. The method of claim 5, The dry film of the green sheet is a plasma display panel manufacturing method characterized in that formed of a plurality of layers. The method of claim 6, And said dry film layer is formed of a plurality of layers each having a different dielectric constant. The method of claim 6, And a dry film layer forming a partition wall close to the display surface of the panel among the plurality of dry film layers has a dark color. A plasma display panel comprising a partition wall formed by the manufacturing method of claim 1.

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