KR20040089839A - A plasma display panel print screen mask - Google Patents

Abstract

PURPOSE: A double screen mask for printing a PDP is provided to obtain a suitable thickness of a sidewall by controlling flowing of a printing solution in results of classifying a high density or a low density with a double stainless mesh. CONSTITUTION: A double screen mask for printing a PDP comprises a square frame(1) formed with a square timber, a polyester mesh(3) fixed at an upper surface of the frame, a stainless mesh(4) mounted on the upper side of the polyester mesh, and a low stainless mesh(6) mounted on the upper surface of the stainless mesh. The stainless mesh is adhered by an adhesive spread at the adhesion line of the polyester mesh.

Description

Double screen mask for plasma display panel printing {A plasma display panel print screen mask}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to screen masks used for front and partial printing applied to screen masks for plasma display panel (PDP) printing, and more particularly to screen masks for beta applications.

In general, in PDP manufacturing, the formation of barrier ribs for forming phosphors is the most important, and the precise formation of such barrier ribs is the most important part of product quality stability.

However, since the formation of such a partition wall is usually used for a pattern, it is impossible to form a printed layer to overlap the upper side for the implementation of the partition wall as shown in FIG. 3 without securing the dimensional stability of the screen mask. Stability has become the most difficult problem in PDP production.

The reason for this is that the screen mask is usually fabricated with a uniform pressure on all four sides of the polyester frame 3 on top of the frame 1 having a constant thickness, and then the top of the frame using an adhesive. This is to adhere the polyester mesh attached to the adhesive to adhere to it. After the adhesion, the stainless mesh attached to the upper part is placed on the upper side again. After forming the adhesive line on the polyester mesh, the stainless mesh is applied to the upper side. The stainless steel mesh is bonded to the polyester mesh by the adhesive applied to the bonding line.

After that, the comb mask is manufactured by cutting the inside of the adhesive line of the polyester net so that the stainless net is exposed.

In this case, the tension of the polyester mesh and the stainless mesh is different from each other, and tension is formed by being attached at various angles according to the density of the mesh.

As such, the polyester meshes and the stainless meshes are fixed to the frame by releasing the straps of the polyester meshes and the stainless meshes.

However, the deformation of the mesh was caused by a change in tension due to the strapping pressure and repeated use, so printing for the pattern was a very difficult problem.

Therefore, in recent years, as shown in FIG. 4, the barrier ribs are formed by the etching method and then the barrier ribs are formed by the etching method, thereby enabling accurate barrier ribs.

However, since the screen mask is also used for the whole application, the height of the bulkhead is usually about 160-180 μ, which means that 6-7 repetitive work processes are required.

Therefore, damage to the screen mask, as well as the cost increase due to the addition of the work process.

Therefore, the present invention has been made in order to solve the above-mentioned conventional problems, and exposed to the polyester mesh to the inside of the adhesive line in the state in which the high mesh stainless mesh is bonded to the adhesive line and then exposed to the inside of the adhesive line. By attaching and fixing the low mesh stainless steel mesh at the bottom of the high mesh stainless steel mesh, the printing liquid passed through the high mesh stainless steel mesh is easily passed by the low mesh stainless steel mesh, and the proper printing liquid is discharged. In order to form two printing furnace bulkheads, the bulkhead has a thickness of about 160-180μ.

1 is a manufacturing process diagram showing the interlayer structure of the network of the present invention.

2 is a perspective view showing the structure to be strapped.

Figure 3 is a process chart showing the manufacturing process for the pattern.

Figure 4 is a process chart showing the manufacturing process for the beta.

Figure 5 is a plan view of a state equipped with a double screen.

Explanation of symbols on the main parts of the drawing

1: frame 2: bulkhead

3: polyester mesh 4: high mesh stainless mesh

5,5a: Bonding line 6: Low mesh stainless steel mesh

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in describing each of the drawings, the same components have the same reference numerals as much as possible even though they are shown in different drawings.

As shown in Fig. 1, the polyester meshes 3, which are strapped to the upper side of the frame 1 of the rectangular frame made of a square material, are fixed to the upper side or the wrap of the frame 1, and the stainless meshes that are strapped to the upper side thereof. 4) is placed in contact with the adhesive applied along the adhesive line 5 of the polyester mesh stainless steel mesh is bonded, and another stainless steel mesh 6 is bonded to the adhesive line (5a) above Losing composition.

At this time, the stainless mesh 4 to be adhered by the adhesive applied to the adhesive line 5 of the polyester mesh 4 is made of ST200, 250, 325, 400 mesh, and a combi mask is first made, and then another stainless mesh 6 is formed thereon. Select from ST10, 20, 30, 40, 60, 80 to 200 to bond the stainless steel mesh 6 in duplicate to the adhesive line 5a.

At this time, the low density stainless steel net 6 is also of course strapped to have a constant tension.

Therefore, the stainless mesh is overlapped with the high mesh and the low mesh so that after the printing liquid passes through the high mesh, many yarns are discharged at the same time by the low mesh network. A thickness of about 160-180μ can be obtained.

The following shows an example of the manufacturing process of the combination mask.

1st process

After fixing polyester 180 and polyester 200 to the strapping machine 100 which is a plate making machine by the strapping process of polyester mesh, it is left for 5 hours after the first strap at 90 degrees, and the polyester mesh is left for 5 hours by secondary strap at 90 degrees. Bond 2 layers and leave for 5 hours.

At this time, the method of strapping is left for 30 minutes (tension 0.95), 2 times (tension 0.85), 3 times (tension 0.75) and then left for 5 hours to bond the polyester meshes to obtain polyester meshes. .

2nd process

In the process of cutting the stainless steel mesh, the stainless steel mesh is twisted 22.5 degrees more than 10cm from front, back, left, and right of the pattern size, that is, the inner space is secured. 20 minutes left after the tension (0.80), 20 minutes after the third pull (tension 0.60) to give a tension of 0.85 after completion.

3rd process

After marking the size of the pattern on the polyester mesh, that is, the inner space, strap the stainless steel mesh and fix it with tape on the polyester mesh, apply 30cm of both ends of the stainless steel mesh with adhesive to form an adhesive line, and leave it for 1 day. do.

At this time, the tension is maintained at 0.85 to perform a COMB MASK manufacturing process.

After leaving for about 24 hours, the stainless steel network portion, that is, the incision along the inner side where the adhesive line is formed, removes the polyester network.

4th process

The low mesh stainless steel network, which is attached to the upper side of the stainless steel network on which the bonding line is formed, is strapped and bonded with a constant pressure.

The present invention prepared as described above has a smooth and smooth flow of the printing liquid during printing by squeegee due to the high mesh stainless steel mesh and the low mesh stainless steel mesh during repeated printing when the polyester mesh and the stainless mesh are squeeged. The thick bulkhead can be obtained by a simple process.

As described above, the screen according to the present invention is a double stainless steel mesh formed on the lower side of the polyester mesh is divided into high density and low density, the flow of printing liquid is controlled to obtain the thickness of the partition wall to be obtained in one or two processes. will be.

Claims (1)

A double-screen mask for PDP printing, characterized by overlapping of the low-mesh stainless mesh again on the upper side of the stainless-steel mesh in a state where the polyester mesh and the stainless mesh, which are each attached to the frame of the rectangular frame, are overlapped and fixed.