KR100524308B1 - Plasma display panel - Google Patents

Abstract

The present invention relates to a plasma display panel capable of improving the contact strength of the partition wall and the substrate.

The present invention provides a plurality of main partitions for distinguishing discharge cells; The auxiliary bulkheads are disposed at both ends of the main partition walls, and each of the auxiliary partition walls is formed in an independent pattern to be separated from the neighboring auxiliary partition walls, and the line width thereof is wider than the line width of the main partition walls.

Description

Plasma Display Panel {PLASMA DISPLAY PANEL}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of improving the contact strength between a partition and a substrate.

Plasma Display Panel (hereinafter referred to as "PDP") displays characters or graphics by emitting phosphors by 147 nm ultraviolet rays generated during gas discharge such as He + Xe, Ne + Xe and He + Ne + Xe. The included image is displayed. Such a PDP is not only thin and easy to enlarge, but also greatly improved in quality due to recent technology development.

The discharge cells of the PDP shown in FIG. 1 include a pair of sustain electrodes formed on the upper substrate 16, that is, a scan electrode Y and a sustain electrode Z, and a data electrode X formed on the lower substrate 14. ).

Each of the scan electrode Y and the sustain electrode Z of the sustain electrode pair includes a transparent electrode and a bus electrode formed at one edge of the transparent electrode and having a line width smaller than that of the transparent electrode. The transparent electrode is usually formed on the upper substrate 16 by indium tin oxide (ITO). The bus electrode is formed of a metal such as chromium (Cr) on the transparent electrode so as to overlap the partition wall 8 to reduce the voltage drop caused by the transparent electrode having high resistance.

The upper dielectric layer 12 and the passivation layer 10 are formed on the upper substrate 16 on which the sustain electrode pairs Y and Z are formed. The upper dielectric layer 12 accumulates wall charges generated during plasma discharge. The protective film 10 prevents damage to the upper dielectric layer 12 due to sputtering generated during plasma discharge and increases the emission efficiency of secondary electrons. Magnesium oxide (MgO) is used for the protective film 10.

The data electrode X is formed in a direction crossing the scan electrode Y and the sustain electrode Z. The lower dielectric layer 18 for wall charge accumulation is formed on the lower substrate 14 on which the data electrode X is formed. The partition wall 8 is formed on the lower dielectric layer 18, and the phosphor 6 is coated on the surfaces of the lower dielectric layer 18 and the partition wall 8. The partition wall 8 is formed in parallel with the data electrode X and prevents ultraviolet rays and visible rays generated by the discharge from leaking into adjacent discharge cells. The phosphor 6 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower substrates 16 and 14 and the partition wall 8.

The discharge cell of this structure is selected by the counter discharge between the data electrode X and the sustain electrode Y, and then sustains the discharge by the surface discharge between the sustain electrode pairs Y and Z. In such a discharge cell, the fluorescent material 8 emits light by ultraviolet rays generated during sustain discharge, so that visible light is emitted outside the cell. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

As a manufacturing method of the partition shown in FIG. 1, an etching method, a sand blast method, and the like are applied.

The etching method is a wet etching process using a photoresist pattern formed by a photolithography process on a partition paste after printing a plurality of partition pastes to have a predetermined height on a lower substrate on which a data electrode and a lower dielectric layer are formed. The partition is formed.

In the sand blasting method, after the bulkhead paste is printed a plurality of times so as to have a predetermined height on the lower substrate on which the data electrode and the lower dielectric layer are formed, sand particles are formed by using a dry film resist pattern formed by a photolithography process on the partition paste. The partition wall is formed by spraying on the partition paste.

As described above, the etching method and the sand blasting method remove the etching liquid or the sand particles by applying the partition paste exposed by the photoresist pattern or the dry film resist pattern. At this time, the partition paste has an effect of etching liquid or sand particles depending on the position. That is, as shown in Figure 2, both ends (A) of the partition walls are exposed more than the central portion of the partition walls are relatively affected by the etching liquid and the sand particles. As a result, the adhesive force between both ends of the barrier rib 8a and the lower substrate 14 is relatively weaker than the adhesive force between the center portion of the barrier rib and the substrate. Accordingly, since the solvent contained in the partition is evaporated by the firing process that proceeds after the partition is formed, the partition is shrunk, so that both ends of the partition 8b are separated from the substrate by a predetermined distance d as shown in FIGS. 3A and 3B. You'll be excited about it. In addition, as shown in FIGS. 4A and 4B, the impact is applied to the partition walls during the polishing process, the phosphor forming process, the bonding with the upper substrate, and the module process to uniform the height of the partition walls after the firing process. A portion of both ends of 8b) is separated from the lower substrate 1. At this time, a part of the separated partition wall flows into the display area of the panel, which adversely affects discharge and causes a panel defect.

 Accordingly, an object of the present invention is to provide a plasma display panel capable of improving the contact strength of the partition wall and the substrate.

In order to achieve the above object, the plasma display panel according to an embodiment of the present invention comprises a plurality of main partitions for distinguishing the discharge cells; The auxiliary bulkheads are disposed at both ends of the main partition walls, and each of the auxiliary partition walls is formed in an independent pattern to be separated from the neighboring auxiliary partition walls, and the line width thereof is wider than the line width of the main partition walls. The auxiliary partition wall is formed to have the same height as the main partition wall. A method of manufacturing a plasma display panel according to an embodiment of the present invention comprises the steps of forming a plurality of main partition walls for distinguishing discharge cells; And forming auxiliary partitions at both ends of the main partition wall, wherein each of the auxiliary partition walls is formed in an independent pattern so as to be separated from neighboring auxiliary partition walls, and the line width thereof is wider than the line width of the main partition wall. The partition wall and the auxiliary partition wall are characterized in that formed on the same plane at the same time. Forming the barrier rib material by printing a barrier paste on the substrate a plurality of times; Forming a dry film resist pattern on the barrier rib material; Patterning the barrier rib material into the sand particles using the dry film resist pattern; Firing the patterned partition wall material. The forming of the main partition wall and the auxiliary partition wall may include forming a partition wall material by printing a partition paste on the substrate a plurality of times; Forming a photoresist pattern on the barrier rib material; Patterning the barrier rib material with an etchant using the photoresist pattern as a mask; Firing the patterned partition wall material.

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Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 5 through 11D.

5 is a perspective view illustrating a plasma display panel according to a first embodiment of the present invention.

The plasma display panel illustrated in FIG. 5 includes a pair of sustain electrodes formed on the upper substrate 116, that is, a scan electrode Y and a sustain electrode Z, and a data electrode X formed on the lower substrate 114. It is provided.

Each of the scan electrode Y and the sustain electrode Z of the sustain electrode pair includes a transparent electrode and a bus electrode formed at one edge of the transparent electrode and having a line width smaller than that of the transparent electrode. The transparent electrode is typically formed on the upper substrate 116 of indium tin oxide (ITO). The bus electrode is formed of a metal such as chromium (Cr) on the transparent electrode so as to overlap the partition wall 108 to reduce the voltage drop caused by the transparent electrode having high resistance.

The upper dielectric layer 112 and the passivation layer 110 are formed on the upper substrate 116 on which the sustain electrode pairs Y and Z are formed. The upper dielectric layer 112 accumulates wall charges generated during plasma discharge. The passivation layer 110 prevents damage to the upper dielectric layer 112 due to sputtering generated during plasma discharge and increases emission efficiency of secondary electrons. Magnesium oxide (MgO) is used as the protective film 110.

The data electrode X is formed in a direction crossing the scan electrode Y and the sustain electrode Z. The lower dielectric layer 118 for wall charge accumulation is formed on the lower substrate 114 on which the data electrode X is formed. A main partition 108 and an auxiliary partition 102 integrated with the main partition 108 are formed on the lower dielectric layer 118, and phosphors 106 are coated on the surfaces of the lower dielectric layer 118 and the main partition 108. do. The main partition wall 8 is formed to be parallel to the data electrode X, and prevents ultraviolet rays and visible rays generated by the discharge from leaking to the adjacent discharge cells. The phosphor 106 is excited by ultraviolet rays generated during plasma discharge to generate visible light of any one of red, green, and blue. Inert gas for gas discharge is injected into the discharge space provided between the upper and lower substrates 116 and 114, the main partition 108, and the auxiliary partition 102.

The discharge cell of this structure is selected by the counter discharge between the data electrode X and the sustain electrode Y, and then sustains the discharge by the surface discharge between the sustain electrode pairs Y and Z. In such a discharge cell, visible light is emitted to the outside of the cell by the phosphor 106 emitting light by ultraviolet rays generated during sustain discharge. As a result, the discharge cells adjust the period during which the discharge is maintained to implement gray scale, and the PDP in which the discharge cells are arranged in a matrix form displays an image.

Meanwhile, as shown in FIG. 6, the auxiliary partition 102 integrated with the main partition 108 is positioned at the start and end of the main partition wall 108 of the plasma display panel according to the first embodiment of the present invention. The auxiliary partition 102 has the same height as the main partition 108 and is formed on the lower dielectric layer 118 perpendicular to the main partition 108. In addition, the auxiliary partition 102 is a protective partition 104 formed to prevent the sealing material 122 for bonding the lower substrate 114 and the upper substrate 116 into the display area as shown in FIG. And a predetermined interval L are formed therebetween.

The secondary partition 102 serves to prevent damage to both ends of the primary partition by at least one of sand particles used in the sandblasting method for forming the primary partition 108 and an etchant used in the etching method. That is, since both ends of the main partition 108 in contact with the auxiliary partition 102 and the exposed area of the central portion of the main partition 108 are the same, the main partition 108 has the influence of the etching liquid and the sand particles regardless of the position. same. In addition, since both ends of the main bulkhead 108 are connected to the auxiliary bulkhead 102, the contact area between both ends of the entire bulkhead (auxiliary bulkhead) and the lower substrate 114 is widened. That is, the conventional barrier ribs and the substrate are in contact with each other by the sum of the widths of the barrier ribs, while the barrier rib and the lower substrate 114 of the present invention have a length (the sum of the widths of the barrier ribs + the width of each discharge cell) of the auxiliary barrier rib 102. Sum). Accordingly, it is possible to prevent the bottom substrate 114 and the partition wall from being lifted by the sand particles and the etching solution and to prevent the end of the partition wall from being lifted off.

FIG. 8 illustrates a partition wall included in a plasma display panel according to a second exemplary embodiment of the present invention.

The partition shown in FIG. 8 includes a main partition 108 for distinguishing each discharge cell and an auxiliary partition 102 connected to both ends of the main partition 108.

The main partition 108 is formed in parallel with the data electrode X and prevents ultraviolet rays and visible rays generated by the discharge from leaking to the adjacent discharge cells.

The auxiliary partition 102 includes a first auxiliary partition 102a connected to the main partition 108 and a second auxiliary partition 102b for connecting the first auxiliary partitions 102a.

The first auxiliary partition 102a is formed to have the same first height h1 as any one of the main partition 108 and the second auxiliary partition 102b. Since the first auxiliary partition 102a is connected to both ends of the main partition 108, the contact area between both ends of the entire partition wall and the lower substrate 114 is widened.

The second auxiliary partition 102b is formed to have a second height h2 that is relatively lower than the main partition 102a. The exhaust property of the panel is improved by the second auxiliary partition 102b having the second height h2. That is, the panel in which the upper substrate 116 and the lower substrate 114 are bonded is exhausted by unnecessary gas in the discharge cell by the second auxiliary partition 102b having a height lower than that of the main partition 108. This is improved.

Accordingly, the plasma display panel according to the second embodiment of the present invention can prevent the bottom substrate and the partition from being lifted by the sand particles and the etchant and prevent the end of the partition from being detached and have a relatively low height. The exhaust property of the panel is improved by the second auxiliary partition wall having.

FIG. 9 illustrates a partition wall included in a plasma display panel according to a third exemplary embodiment of the present invention.

The partition shown in FIG. 9 includes a main partition 108 for distinguishing each discharge cell, and an auxiliary partition 102 having an exhaust hole 120 connected to both ends of the main partition 108.

The main partition 108 is formed in parallel with the data electrode X and prevents ultraviolet rays and visible rays generated by the discharge from leaking to the adjacent discharge cells.

The secondary partition 102 is formed to have the same height as or lower than the main partition 108. Since both ends of the auxiliary bulkhead 102 and the main bulkhead 108 are connected to each other, the contact area between both ends of the entire bulkhead (auxiliary bulkhead) and the lower substrate 114 is widened.

Exhaust holes 120 are formed in the auxiliary partition wall 102 at predetermined intervals to improve exhaust properties. That is, the exhaust hole 120 is formed for each discharge cell group divided into predetermined units as shown in FIG. 9 or is formed for each discharge cell as shown in FIG. 10. Since the exhaust gas 120 discharges unnecessary gas in the discharge cells, the exhaustability of the panel is improved.

Accordingly, the plasma display panel according to the third embodiment of the present invention can prevent the bottom substrate and the partition from being lifted by the sand particles and the etchant and prevent the end of the partition from being detached. The exhaustability of the is improved.

The partition walls of the plasma display panel according to the first to third embodiments of the present invention are formed by any one of a sand blasting method and an etching method. Among these, the manufacturing method of the partition which concerns on this invention formed by the sandblasting method is demonstrated with reference to FIGS. 11A-11D.

First, as shown in FIG. 11A, the barrier paste 200 is formed on the lower substrate 114 on which the data electrode X and the lower dielectric 118 are sequentially formed. The partition paste 200 is formed by printing a plurality of times to have a predetermined height. Thereafter, the partition paste 200 is dried.

Then, as shown in FIG. 11B, a dry film resist (“DFR”) 222 is deposited on the barrier paste 200. Subsequently, a photomask 220 for forming a partition on the DFR 222 is aligned above the lower substrate. The photomask 220 includes a mask substrate 224 made of a transparent material and a blocking portion 226 formed in the blocking region S2 of the mask substrate 224. Here, the region where the mask substrate 224 is exposed becomes the exposure region S1. That is, the exposure area S1 corresponds to the area where the partition wall is to be formed and transmits the irradiated light so that the DFR 222 is exposed to the light, and the blocking area S2 blocks the irradiated light so that the DFR 222 is blocked. Avoid exposure to light.

The DFR 222 is patterned by a photolithography process including an exposure and development process using such a photomask to form the DFR pattern 228 shown in FIG. 11C. Subsequently, sand particles are sprayed onto the partition paste using the DFR pattern as a mask by using a sand blasting device (not shown), so that the partition paste 200 is patterned to form the main partition wall 108 according to the first to third embodiments of the present invention. ) And the secondary partition 102 is formed.

Subsequently, as shown in FIG. 11D, after the DFR patterns 228 remaining on the partitions 108 and 102 are removed, the partitions 108 and 102 are fired to a predetermined temperature.

As described above, the plasma display panel and the method of manufacturing the same according to the present invention are provided at both ends of the main partition wall and include auxiliary partition walls connected to each of the main partition walls. The auxiliary bulkhead widens the contact area with the substrate, thereby preventing the lower substrate and the partition from being lifted by the sand particles and the etchant and preventing the end of the partition from being detached. In addition, the plasma display panel and the method of manufacturing the same according to the present invention have a relatively low height of the auxiliary barrier ribs or exhaust holes penetrating the auxiliary barrier ribs to improve the exhaust performance of the panel.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

1 is a perspective view showing a surface discharge type plasma display panel of an AC driving method.

FIG. 2 is a perspective view for explaining a partition formation process illustrated in FIG. 1.

3A and 3B are diagrams for explaining the lifting phenomenon of the partition wall after the partition wall firing.

4A and 4B are diagrams for describing a tearing phenomenon of a partition wall.

5 is a perspective view illustrating a plasma display panel according to a first embodiment of the present invention.

6 is a view illustrating in detail the partition wall illustrated in FIG. 5.

FIG. 7 is a diagram for describing a positional relationship of partition walls illustrated in FIG. 6.

8 is a perspective view illustrating a partition of a plasma display panel according to a second embodiment of the present invention.

9 is a perspective view illustrating a partition of a plasma display panel according to a third exemplary embodiment of the present invention.

FIG. 10 is a perspective view illustrating another form of the partition wall illustrated in FIG. 9.

11A to 11D are cross-sectional views illustrating a method of manufacturing a partition wall according to the first to third embodiments of the present invention.

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

X: Data electrode Y: Scan electrode

Z: sustain electrode 6: phosphor

8,108 bulkhead 10,110 shield

12,112: upper dielectric 14,114: lower substrate

16,116: upper substrate 18,118: lower dielectric

102: auxiliary bulkhead 120: exhaust hole

Claims (10)

A plurality of main partition walls for distinguishing discharge cells; Comprising auxiliary partitions located at both ends of the main partition wall, Wherein each of the auxiliary barrier ribs is formed in an independent pattern so as to be separated from neighboring auxiliary barrier ribs, and the line width thereof is wider than that of the main barrier ribs. delete The method of claim 1, And the auxiliary partition wall is formed at the same height as the main partition wall. delete delete delete delete delete delete delete