KR20000044632A - Fabrication method of back panel for pdp - Google Patents

Abstract

PURPOSE: A fabrication method of back panel for PDP(Plasma Display Panel) is provided to enhance the positioning precise of barrier ribs and the uniformity of height of the barrier ribs, thereby assuring reproductivity and fine patterns. CONSTITUTION: A fabrication method of back panel for PDP comprises: a first step coating paste for electrode on the back plate; a second step patterning the paste to simultaneously form address electrodes and a seed layer for forming barrier ribs; a third step forming a film which isn't reacted in electro plating; a forth step patterning the film to expose the seed layer; and a sixth step removing the film after the fifth step.

Description

Manufacturing method of back plate of plasma display panel

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to plasma display panel (PDP) technology, and more particularly to a method for manufacturing a back panel of a plasma display panel.

PDP is a device that displays characters or images by using light emitted from plasma generated during gas discharge, and is also called a gas discharge display device. PDP is largely exposed to direct plasma because the electrode used to apply external voltage to form plasma is directly exposed because the direct current (DC) type and conduction current flowing through the electrode are covered with dielectric. Therefore, it is classified into AC type through which displacement current flows. In addition, depending on the electrode structure of the discharge cell, it is classified into a counter discharge type, a surface discharge type, a barrier rib discharge type, and the like. In the case of directly using the visible light emitted from the discharge gas, it is used in a monochromatic display PDP device. There is an orange PDP from Ne gas, and when full color display is required, ultraviolet light emitted from discharge gas such as Kr or Xe is red (R), green (G) and blue (B) phosphor. Using the visible light to excite the. However, there are still problems such as low brightness and contrast ratio, high driving voltage, low power consumption efficiency, and low manufacturing yield due to the difficulty in manufacturing process technology due to large size. I have a problem to do.

1 is a cross-sectional view illustrating a structure of a general AC PDP, and a transparent electrode 12 and a bus electrode 13 for discharging are formed on a glass substrate 11, and an insulating dielectric ( 14 comprises a front plate covering the above structure, and a back plate on which an address electrode 15 and a partition wall 16 are arranged on a glass substrate 17. In addition, a phosphor 18 having a display color is formed between the partition walls 16, and the phosphor 18 and the address electrode 15 are insulated from the dielectric 19. In the discharge space formed between the partition 16 and the front plate, Ne / Xe (1 to 4%) mixed gas is filled with 300 to 400 torr, and phosphors R, G, and B formed on the wall of the partition 16 are formed. Reference numeral 18 denotes color display by emitting light from ultraviolet rays generated by plasma discharge.

The partition wall 16 is a structure for maintaining the discharge distance and preventing electrical and optical interference between adjacent cells, and is required to have a width of 70 to 100 µm and a height of 120 to 200 µm.

2 is a view illustrating a barrier rib forming process according to the related art, and a barrier rib 20 having a desired height is formed by performing pattern printing and drying several times using a screen mask.

However, such a conventional barrier rib formation technique requires a plurality of printing processes, resulting in poor positional accuracy of the pattern (due to a change in the stress of the mask and a change in the process temperature over time) and a poor uniformity of the barrier height. (Which adversely affects the formation of subsequent phosphors and may cause unstable discharges in image formation) There was.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for manufacturing a back plate of a plasma display panel which improves the positional accuracy of the partition wall and the uniformity of the partition wall height, ensures reproducibility of the process, and can form fine patterns.

1 is a cross-sectional view showing the configuration of a typical AC PDP.

2 is a process diagram of forming a barrier rib according to the prior art.

3A to 3H are rear plate manufacturing process diagrams of a PDP according to an embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

30 glass substrate 31 photosensitive paste

31a: address electrode 31b: support pattern for forming partition wall

32, 34: photo mask 33: photosensitive DFR

35 bulkhead material 36 insulating white paste

The present invention seeks to form partition walls using electroplating. That is, the present invention forms a barrier layer formation support layer (seed layer) at the same time as the address electrode is formed, and selectively performs electroplating to form a barrier rib. In this case, compared to the conventional screen printing method, since the partition wall is formed by only one alignment without distortion of the partition wall caused by alignment instability due to mask deformation, accurate pattern formation is possible. In addition, since the partition wall is formed by the electroplating method, the flatness defect caused by the pattern of the mask itself is hardly generated. In addition, even in the space of the width of the electrode can be stacked without difficulty because fine pattern formation is possible.

Accordingly, in order to achieve the above technical problem, a method of manufacturing a back plate of a characteristic plasma display panel provided from the present invention includes a first step of applying an electrode paste on a back substrate; Patterning the electrode paste to simultaneously form an address electrode and a support pattern for forming a partition; A third step of forming a material film which does not react upon electroplating on the entire structure after performing the second step; A fourth step of patterning the material film to form a trench exposing the support pattern for forming the partition wall; A fifth step of embedding the partition material in the trench using an electroplating method; And a sixth step of removing the remaining material film after the fifth step.

Hereinafter, preferred embodiments of the present invention will be introduced in order to enable those skilled in the art to more easily carry out the present invention.

3A to 3H illustrate a process of forming a partition wall of a PDP according to an embodiment of the present invention, which will be described with reference to the following.

In the process according to the present embodiment, first, as shown in FIG. 3A, the photosensitive paste 31 is completely coated on the glass substrate 30 using spin coating or β printing.

Next, as shown in FIG. 3B, an ultraviolet (UV) exposure process using the photomask 32 on which the address electrode and the partition structure are printed is performed.

Subsequently, as shown in FIG. 3C, the developing process is performed to form the address electrode 31a and the support layer 31b for forming the partition wall, and the firing process is performed.

Subsequently, as illustrated in FIG. 3D, a photosensitive dry film resist (DFR) 33 is formed on the entire structure, and an ultraviolet (UV) exposure process is performed using a photomask 34 on which a partition structure is printed.

Next, as illustrated in FIG. 3E, a developing process is performed to pattern the photosensitive DFR 33. At this time, the partition formation support pattern 31b is exposed.

Subsequently, the partition material 35 is embedded by electroplating as shown in FIG. 3F.

Subsequently, the photosensitive DFR 33 is removed as shown in FIG. 3G, and β-printed an insulating white paste 36 having a relatively low viscosity (20 to 30 Pa · s) as shown in FIG. 3H. The coating is applied using a method, high temperature (about 180 DEG C) drying is performed, a phosphor (not shown) is formed, and a firing process is performed to simultaneously fire the insulating white paste 35 and the phosphor.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes can be made in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

The present invention described above can solve the problem of the alignment of the electrode and the partition wall due to the deformation of the back substrate, it is possible to form the partition wall in a fine pattern of less than the electrode width can be applied to high-precision panel manufacturing. In addition, the present invention can be expected to reduce the production cost is improved productivity and reproducibility.

Claims (7)

A first step of applying the electrode paste on the back substrate; Patterning the electrode paste to simultaneously form an address electrode and a support pattern for forming a partition; A third step of forming a material film which does not react upon electroplating on the entire structure after performing the second step; A fourth step of patterning the material film to form a trench exposing the support pattern for forming the partition wall; A fifth step of embedding the partition material in the trench using an electroplating method; And A sixth step of removing the remaining material film after the fifth step; Back plate manufacturing method of the plasma display panel comprising a. The method of claim 1, After performing the sixth step, A seventh step of applying the insulating white paste, And an eighth step of drying the insulating white paste at a high temperature. The method of claim 2, After performing the eighth step, Forming a phosphor between the partition materials; And a tenth step of performing the firing process of the insulating white paste and the phosphor. The method of claim 1, The electrode paste, It is a photosensitive paste, The manufacturing method of the back plate of a plasma display panel. The method according to claim 1 or 2, The material film, Method for manufacturing a back plate of a plasma display panel, characterized in that the photosensitive dry film resist (DFR). The method of claim 2, The insulating white paste, It has a viscosity of 20-30 Pa.s, The manufacturing method of the back plate of a plasma display panel. The method of claim 4, wherein The second step, A seventh step of exposing the photosensitive paste using a photo mask on which the address electrode and the barrier rib structure are printed; An eighth step of patterning the photosensitive paste by a developing process; And And a ninth step of carrying out the calcination process.