KR19990054285A - Plasma Display Panel And Method Of Manufacturing The Same - Google Patents

Abstract

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of suppressing thermal deformation of a substrate and a method of manufacturing the same. In the present invention, first, the back substrate is patterned to form several recesses and protrusions therein, and then a conductive electrode is applied to the bottom of the recesses, dried, and baked to form a first electrode. Here, since the protrusions serve as partition walls for limiting the unit discharge space, in the present invention, the partition wall forming process can be eliminated, thereby reducing the thermal deformation of the substrate, and achieving high definition. have. In addition, by using a metal substrate instead of a glass substrate, it is possible to reduce the weight of the device, as well as to improve the discharge heat effect to improve the life of the device.

Description

Plasma Display Panel And Method Of Manufacturing The Same

The present invention relates to a plasma display panel, and more particularly, to a plasma display panel capable of suppressing thermal deformation of a substrate and a method of manufacturing the same.

Plasma Display Panel (PDP), which is one of the flat panel display devices, consists of an array of discharge cells that can be discharged independently, and discharges each discharge cell independently according to an electrical signal applied from the outside. The desired video signal is reproduced.

Since the overall thickness of the PDP can be less than 1 cm, the thickness and weight of the PDP can be remarkably reduced compared to the CRT display device using an electron gun. In addition, the narrow viewing angle of the liquid crystal display can be improved. Has

In addition, the PDP has a structure in which two light-transmissive substrates each having electrodes are bonded to each other, and a barrier rib interposed therebetween to define independent discharge spaces and to suppress crosstalk between pixels. By constructing a wide space between the ()) there is an advantage that it is easy to manufacture a large display device easily.

1 is a cross-sectional view showing a direct current type PDP according to the prior art. As shown in the drawing, the direct current type PDP includes a back substrate 1 having a first electrode 2 formed thereon and a front substrate having a second electrode 7 formed thereon. (6) is a sealed form.

Here, the discharge cells are defined by the partitions 4 formed on the rear substrate 1, and the dielectric layers 3 are formed on both sides of the first electrode 2 on the rear substrate 1 in the discharge space. On the side of the partition 4 and the dielectric layer 3, phosphors 5 for realizing colorization are applied within a range in which the upper surface of the first electrode 2 is not covered, and argon (Ar) in the discharge space. ), Discharge gases 8 such as neon (Ne) or xenon (Xe) are injected.

However, the PDP according to the prior art as described above forms an electrode, a partition and the like by a printing method at the time of its manufacture. In the case of the partition, it is difficult to achieve high definition because the printing process must be repeatedly performed. In the case of using a large-area glass substrate, thermal deformation of the glass substrate is caused by the firing process performed after the printing process.

Accordingly, the present invention has been made to solve the above problems, PDP can achieve a high definition, and can also reduce the thermal deformation of the substrate due to the firing process carried out during the formation of the electrode and the partition wall and Its purpose is to provide a method for its manufacture.

In addition, an object of the present invention is to provide a PDP and a method for manufacturing the same, which can reduce the surface area of the electrode exposed to the discharge space to prevent deterioration of the electrode by sputtering.

In addition, an object of the present invention is to provide a PDP and a method of manufacturing the same by using a metal substrate instead of a glass substrate, which can reduce the weight of the apparatus and improve the discharge heat effect to increase the lifetime of the apparatus.

1 is a cross-sectional view showing a conventional DC plasma display panel.

2A to 2C are cross-sectional views of a series of steps for explaining a method for manufacturing a plasma display panel according to a first embodiment of the present invention.

3A to 3C are cross-sectional views of a series of steps for explaining a method of manufacturing a plasma display panel according to a second embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

10 back substrate 12 photoresist pattern

13 insulating layer 14 first electrode

In order to achieve the above object, the present invention is to pattern the back substrate to form depressions and protrusions therein. At this time, the protrusion is a partition defining a unit discharge space, the depression is a discharge space. Subsequently, after the electrode material is applied to the recesses provided in the substrate, the electrode material is dried and baked to form first electrodes on the bottom of the recess.

In addition, the present invention is to pattern a metal substrate instead of a glass substrate to form a depression and a protrusion on the metal substrate in the same manner as above, after applying an insulating layer on the entire surface of the substrate, and then the first electrode on the insulating layer of the depression Form.

According to the present invention, since the protrusions provided on the substrate serve as partition walls by the patterning process, there is no need to perform a separate partition wall formation process, and accordingly, a high definition of the PDP can be achieved, and the firing step It is possible to prevent the thermal deformation of the substrate due to.

(Example 1)

Hereinafter, a method of manufacturing a PDP according to a first embodiment of the present invention will be described in more detail with reference to FIGS. 2A to 2C.

2A to 2C are a series of cross-sectional views illustrating a method of manufacturing a PDP according to a first embodiment of the present invention.

Referring to FIG. 2A, after the photoresist is coated on the back substrate 10, the photoresist pattern 12 is formed by exposing and developing the photoresist. At this time, the back substrate 10 uses a glass substrate thicker than the conventional glass substrate.

Referring to FIG. 2B, the exposed portion of the substrate 10 is etched to a predetermined depth by using sand blasting, and then the photoresist pattern 12 is removed. As a result, several recesses 11a and protrusions 11b are formed in the back substrate 10, where the recesses 11a become unit discharge spaces, and the protrusions 11b serve as partition walls. do.

Therefore, a separate process for forming the partition wall is not necessary. Accordingly, since the repetitive printing process for forming the partition wall is eliminated, high definition can be achieved and thermal deformation of the substrate due to the firing process can be prevented. Can be.

Referring to FIG. 2C, an electrode material containing a rare earth compound having a high secondary electron emission coefficient in the depressions 11a included in the back substrate 10, for example, nickel (Ni), aluminum (Al), and a binder After apply | coating the electrically conductive paste consisting of, it is dried.

Then, the conductive paste dried at a temperature below the melting point of the glass substrate at a temperature of 480 to 520 ° C. is fired to form the first electrodes 14 in the depressions 11a, respectively. In this case, the thickness of the first electrode 14 is such that the thickness of the first electrode 14 is not formed to the upper surface of the recessed portion so as to secure the discharge space. Is formed.

Thereafter, after forming the second electrodes on the front substrate through a conventional process, the discharge gas is sealed in a discharge space in a state where the back and front substrates are bonded together so that the first and second electrodes are perpendicular to each other. To make.

In the PDP according to the present invention as described above, the depressions between adjacent protrusions serve as one discharge space. Since the first electrode is formed on the entire bottom surface of the depression, the surface area of the first electrode exposed to the discharge space. By this reduction, deterioration of the electrode due to sputtering can be prevented.

(Example 2)

Hereinafter, a method of manufacturing a PDP according to a second embodiment of the present invention will be described in detail with reference to FIGS. 3A to 3C.

3A to 3C are a series of cross-sectional views for explaining a method of manufacturing a PDP in a second embodiment of the present invention. Here, the same parts as in Fig. 2 are denoted by the same reference numerals.

Referring to FIG. 3A, the photoresist pattern 12 is formed on one of two substrates, for example, the back substrate 10 as in the above-described embodiment. In this case, the back substrate 10 uses a metal substrate instead of a glass substrate. Here, since the metal substrate is relatively lighter than the glass substrate, the overall weight of the apparatus can be reduced.

Referring to FIG. 3B, after etching a predetermined depth of the exposed back substrate 10 using the photoresist pattern 12 as an etching mask, the photoresist pattern 12 is removed. As a result, several protrusions 11a and depressions 11b are formed on the back substrate 10.

Referring to FIG. 3C, after the insulating layer 13 having a predetermined thickness is formed on the front surface of the rear substrate 10 having the protrusions and the recesses 11a and 11b, the insulating layer 13 formed on the recess 11a is formed. As in the above-described embodiment, the electrode material is applied, dried, and fired to form the first electrode 14. Here, the insulating layer 13 serves to electrically insulate the metal substrate from the electrodes.

Subsequently, after fabricating the front substrate with the second electrodes through a conventional process, the discharge gas is sealed in a discharge space in a state in which the back and front substrates are bonded together so that the first and second electrodes are perpendicular to each other. To produce.

In the second embodiment of the present invention, since the metal substrate is used instead of the glass substrate, the overall weight of the apparatus can be reduced and the heat dissipation effect can be increased. In addition, in a PDP that achieves gas discharge using a conventional trigger electrode, since a metal substrate serves as a trigger electrode, there is no need to perform a separate trigger electrode forming process, thereby providing a smooth discharge. You can get it.

As described above, according to the present invention, a PDP and a method for manufacturing the same are formed by patterning a substrate to form several recesses and protrusions therein, and then embedding an electrode material on the bottom of the recesses to form electrodes for discharge. Of course, by allowing the protrusions to act as partition walls, it is possible to eliminate the separate partition wall forming process to prevent thermal deformation of the substrate, and also to reduce the surface area of the electrode exposed to the discharge space to prevent deterioration of the electrode by sputtering. can do.

In addition, by using a metal substrate instead of a glass substrate, it is possible to reduce the overall weight of the device, as well as to improve the heat effect of the discharge to extend the life of the device.

In addition, when using a metal substrate, it is not necessary to form a trigger electrode separately, thereby reducing the overall manufacturing process step of the PDP.

Meanwhile, although specific embodiments of the present invention have been described and illustrated, modifications and variations can be made by those skilled in the art. Accordingly, the following claims are to be understood as including all modifications and variations as long as they fall within the true spirit and scope of the present invention.

Claims (14)

Opposing back and front substrates; Barrier ribs that maintain a distance between the rear substrate and the front substrate and define a unit discharge space; And discharge electrodes formed on the front substrate and the rear substrate at regular intervals so as to be disposed in each of the discharge spaces. And a plurality of depressions and protrusions on the back substrate, wherein the depression is a discharge space, and the protrusion is a partition wall for defining a unit discharge space. The plasma display panel of claim 1, wherein the back substrate is a glass substrate. The plasma display panel of claim 2, wherein the electrode provided on the rear substrate is formed in a recess provided in the rear substrate. 4. The plasma display panel of claim 3, wherein the electrode is formed on a bottom surface of the depression. The plasma display panel of claim 1, wherein the back substrate is a metal substrate. The plasma display panel of claim 5, wherein an insulating layer is interposed between the back substrate made of the metal substrate and the electrode. Forming a photoresist pattern exposing predetermined portions thereof on the back substrate; After etching a predetermined depth of the exposed substrate portion, removing the photoresist pattern to form several depressions and protrusions on the back substrate; And And forming an electrode on a bottom surface of the recessed portion. The method of claim 7, wherein the back substrate is a glass substrate. The method of claim 7, wherein the forming of the electrode on the bottom of the depression Applying and drying a conductive paste in the depressions; And calcining the dried conductive paste at a predetermined temperature. 10. The method of claim 9, wherein the conductive paste contains a rare earth compound having a high secondary electron emission coefficient. The method of manufacturing a plasma display panel according to claim 10, wherein the conductive paste contains nickel, aluminum and a binder. The method of claim 9, wherein the conductive paste is baked at a temperature of 480 to 520 ° C. 11. 8. The method of claim 7, wherein the back substrate is a metal substrate. The method of manufacturing a plasma display panel according to claim 13, wherein an insulating layer having a predetermined thickness is formed on the front side of the rear substrate before the electrode is formed in the recessed portion of the rear substrate made of the metal substrate.