KR19990053749A - Partition wall formation method of plasma display panel - Google Patents

Abstract

A method of forming a barrier rib using a patterned metal frame by patterning a metal frame on the upper surface of the substrate includes printing and drying a space between the patterned metal frame spaced from the upper surface of the substrate at a predetermined interval with a paste. Repeatedly filling, firing the resultant to form a partition between the patterned metal frame, and detaching the partition from the patterned metal frame.

Description

Partition wall formation method of 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 method for manufacturing partition walls of the panel.

Plasma Display Panel (PDP) is a flat panel display device that is composed of discharge cells capable of independently discharging, and independently discharges each discharge cell according to an external electrical signal to reproduce a desired image signal. The PDPs are arranged on both sides of the mixed gas layer in the order of a protective film, a dielectric layer, a metal electrode, and a glass substrate. At this time, discharge occurs in the mixed gas layer, and partition walls are interposed to define an independent discharge space of each cell and prevent cross talk between pixels. The partition wall forming method includes a printing method, a sandblast, and a lift-off method. However, in the printing method, since the printing and drying must be repeated 10 times or more to form the partition wall, it takes a lot of time, and the position of the partition wall may be displaced during the repetition process, which may interfere with the manufacture of the high resolution partition wall. In the case of the sand blast method, the cost of equipment investment is high, and physical impact is applied to the substrate glass, which causes cracking of the substrate during firing. On the other hand, in the case of the lift-off, the process is complicated and takes a long time when forming a pattern of 100 μm or more, and the formed pattern may be torn down or the partition wall may be cracked during firing, and after the firing, a photosensitive film remains to remove it. have.

Accordingly, an object of the present invention is to provide a method for manufacturing a partition wall of a plasma display panel that can solve a conventional problem.

1A to 1F are cross-sectional views of a process for forming a metal frame for implementing the present invention.

2a to 2d are process cross-sectional views showing one embodiment of the method for forming a partition of the present invention.

3A to 3D are cross-sectional views showing another embodiment of the method for forming a partition of the present invention.

4 is a cross-sectional view illustrating a method of forming a partition wall by a blade coating method.

5A and 5B are cross-sectional views of a plasma display panel to which a partition wall formed according to the spirit of the present invention is applied.

One embodiment of the method for manufacturing a partition wall to achieve the object of the present invention comprises the steps of (a) preparing a substrate, (b) forming a metal frame on the upper surface of the substrate and patterning the same spaced apart from each other, (c) Filling a space between the spaced metal patterns, (d) firing the resultant to form a partition wall in the space, and (e) detaching the partition wall from the metal pattern, and (b) Step by step. Applying a photoresist film to the upper surface of the metal frame and patterning the photoresist film; patterning the metal frame using the patterned photoresist film as a mask; and removing the photoresist pattern; It can be patterned by punching at intervals.

The paste is filled in the space between the patterned metal molds by blade coating or printing, which is subjected to at least two unit processes consisting of printing and drying the paste.

According to another embodiment of the barrier rib manufacturing method according to the present invention, the barrier rib manufacturing method, (a) preparing a substrate, (b) forming a metal frame on the upper surface of the substrate and patterned to be spaced apart at regular intervals, ( c) laminating a dry film on the entire surface of the resultant, (d) compressing a space between the spaced metal patterns in the dry film, (e) firing the resultant to form a dry film on the upper surface of the metal pattern as a partition wall, And (f) detaching the barrier rib from the metal pattern, and (b) applying the photoresist to the upper surface of the metal frame and patterning the photoresist, using the patterned photoresist as a mask. Patterning the metal frame, removing the photoresist pattern, or patterning the metal frame by punching the metal frame at regular intervals.

In the above two embodiments, the substrate comprises a glass layer or a dielectric layer.

On the other hand, if the plasma display panel is implemented by using the barrier ribs manufactured according to the above method, the printing position at the barrier rib formation is automatically aligned, the barrier rib formation time is shortened, and the crack of the substrate formed under the barrier rib during the firing is prevented. Since the photosensitive film is not used at the time of forming the partition wall, the cleaning process of the photosensitive film is unnecessary.

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

1A-1F illustrate the step of patterning a metal frame. The metal frame 10 is prepared on the substrate 20 (FIG. 1A), and the photosensitive film 12 is coated on the metal frame 10 (FIG. 1B). A portion of the photosensitive film is exposed, patterned and developed using the mask 14 (FIGS. 1C and 1D). Next, the metal frame 10 is etched using the photosensitive film pattern 16 as a mask to form a patterned metal frame 10a (FIG. 1E). The photosensitive film pattern located on the upper surface of the patterned metal frame 10a is peeled off (FIG. 1F). The height of the metal frame shall be at least as high as the bulkhead to be formed.

Now the bulkhead is formed. The space 24 between the patterned metal frames 22 formed in the substrate 20, as in FIG. 2A, is initially empty but is filled by applying a glass paste to a conventional printing method or blade coating method as shown in FIG. The substrate 20 here comprises a glass layer 60 or dielectric layer 64 in FIGS. 5A and 5B. The paste filled in the space 24 is dried (FIG. 2B), and this process is repeated two or three times to fill the paste in the space 24 (FIG. 2C). The resulting product is fired (FIG. 2D) to detach the partition wall from the metal frame. Since the thermal expansion coefficients of the barrier material and the metal frame are different, desorption may be performed, and the barrier wall may be detached from the metal frame by physically applying pressure. The partitions 58 and 68 of Figs. 5A and 5B are manufactured by the method of Figs. 2A to 2D, and the process after the partition formation uses a conventional plasma display panel manufacturing process. That is, the back substrates 52 and 62, the address electrodes 53 and 63, the first dielectric layers 54 and 64, the display electrodes 55 and 65 and the second dielectric layers 56 and 66 in FIG. 5A (FIG. 5B). The protective layers 57, 67, phosphors 59, 69, and the like are formed using conventional ones.

Another embodiment of a method for manufacturing a partition wall using the metal frame formed by FIGS. 1A-1F is shown in FIGS. 3A-3D. The metal frame pattern 36 is disposed on the upper surface of the substrate 30 corresponding to the substrate 20 at predetermined intervals 32, and a dry film 34 is formed on the upper surface of the patterned metal frame 36. (FIG. 3A). The puncher 38 is used to compress a portion of the dry film 34 corresponding to the space 32 at a high temperature (FIG. 3B). Firing and desorption of the puncher (FIG. 3C). Next, the partition wall 38 is formed on the upper surface of the substrate 30 by removing the metal frame. The principle and method of desorption are the same as that of FIG. 2D and the subsequent manufacturing process of the plasma display panel uses the method described above with respect to FIGS. 5A and 5B in the description of FIGS. 2A-2D.

Meanwhile, as another method of forming the metal pattern of FIGS. 1A to 1F (not shown), the metal frame 10 may be patterned by punching at a predetermined interval.

In the present invention, since the metal frame is used to form the partition, the printing position is automatically aligned when the printing and drying are repeated, and the printing and drying are performed only two or three times, thereby shortening the formation time of the partition. Since the substrate to be formed is not subjected to physical impact, the possibility of uniformity during firing is considerably reduced, and since the photosensitive film is not used at the time of forming the partition wall, the cleaning process of the photosensitive film is unnecessary.

In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.

Claims (10)

(a) preparing a substrate, (b) forming a metal frame on the upper surface of the substrate and patterning the same to be spaced apart by a predetermined interval; (c) filling paste into the spaces between the spaced metal patterns, (d) firing the resultant to form a partition in the space, and (e) detaching the partition wall from the metal pattern. The method of claim 1, wherein the step (b) comprises applying a photoresist film to the upper surface of the metal frame and patterning the photoresist film, patterning the metal frame using the patterned photoresist film as a mask, and the photoresist pattern. Method of manufacturing a partition wall of the plasma panel, characterized in that consisting of a step of removing. The method of claim 1, wherein in the step (b), the metal frame is punched and patterned at a predetermined interval. The method of claim 1, wherein the paste is filled in the space by using a blade coating or printing method. 5. The method of claim 4, wherein the blade coating and printing method is performed at least twice a unit process consisting of printing and drying the paste. The method of claim 1, wherein the substrate comprises a glass layer or a dielectric layer. (a) preparing a substrate, (b) forming a metal frame on the upper surface of the substrate and patterning the same to be spaced apart at regular intervals; (c) laminating a dry film over the entire surface of the resultant, (d) compressing a space between the spaced metal patterns in the dry film, (e) firing the resultant to form a dry film on the upper surface of the metal pattern as a partition wall, and and (f) detaching the partition wall from the metal pattern. 8. The method of claim 7, wherein the step (b) comprises: applying a photoresist film to the upper surface of the metal frame and patterning the photoresist film; patterning the metal frame using the patterned photoresist film as a mask; Method of manufacturing a partition wall of the plasma display panel, characterized in that the step of removing the pattern. 8. The method of claim 7, wherein the step (b) comprises: patterning the metal frame by punching the metal frame at a predetermined interval. The method of claim 7, wherein the substrate comprises a glass layer or a dielectric layer.