JP3310407B2 - Method for forming barrier of plasma display panel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for manufacturing a plasma display panel (hereinafter, referred to as PDP), and more particularly to a method for forming a barrier constituting a discharge space of a PDP.

[0002]

2. Description of the Related Art Conventionally, as a method of forming a barrier in a PDP, a glass paste is superimposed on a glass substrate in a pattern by screen printing, and the paste is dried and fired to form a desired barrier. However, since this method is complicated and it is difficult to obtain good line width accuracy, recently, a glass paste is applied to a predetermined thickness on a glass substrate and dried,
A method has been proposed in which a mask having sand blast resistance is formed thereon in a pattern, and then the glass paste is ground by performing sand blasting through the sand blast mask to form a barrier of a desired pattern. .

[0003]

When a barrier is formed by the above-mentioned sand blasting method, the processing time is prolonged when an abrasive material having a low grinding force is used, and conversely, when an abrasive material having a strong grinding force is used, the processing time becomes longer. Although shortened, there is a problem that a barrier having a good shape cannot be obtained, and damage to the lower surface such as an electrode and glass is increased. Although it has been proposed to cover the lower surface with a protective film in order to prevent this damage, there is a problem that the number of steps is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to reduce the damage to the lower surface during sandblasting without using a protective film or the like, and to reduce the damage. It is an object of the present invention to provide a PDP barrier forming method capable of forming a well-shaped barrier in a short time.

[0005]

In order to achieve the above object, the present invention provides a method for forming a barrier glass paste layer on a glass substrate and forming a patterned sandblast mask on the glass paste layer. In the method for forming a barrier of a plasma display panel in which a barrier is formed by sandblasting through the sandblasting mask, primary grinding is performed with a strong grinding force, and then secondary grinding is performed with a weak grinding force. It is characterized by.

Here, the grinding force depends on the type of the abrasive, for example,
The strength can be changed by using powders having different shapes, sizes, specific gravities and the like. Alternatively, conditions such as the injection pressure, the injection amount, and the injection distance during sandblasting may be changed.

[0007]

In the barrier forming method having the above-described structure, the glass paste is ground in a short time by the primary grinding to an intermediate depth, and the secondary grinding reduces the damage to the lower surface to reduce the remaining glass paste. Finish grinding is performed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

First, as shown in FIG.
A glass paste for a barrier is coated on a glass substrate 2 on which a film is formed by a blade coater or screen printing.
The glass paste layer 3 is formed by applying and drying at 50 μm. Next, using PVA with a diazonium salt as a mask material, as shown in (b), the glass paste layer 3 is coated with a spinner, a roller coater, a blade coater or the like so as to have a thickness of 10 to 15 μm. To form a mask layer 4 and then
Exposure was performed via the mask pattern 5. Exposure conditions are
When measured at 365 nm, the intensity is 700 μW / cm ² and the irradiation dose is 400 mJ / cm ² . After the exposure, the film was immersed in water for 1 to 2 minutes, and then spray-developed to form a sandblast mask 6 on the glass paste layer 3 as shown in FIG.

Then, after a drying step, as shown in FIG. 2D, primary grinding by sandblasting is performed through a sandblasting mask 6 to reduce unnecessary portions of the glass paste layer 3 to an intermediate depth. Removed. In this primary grinding, pulverized alumina of 10% was used as an abrasive.
Using a jet pressure of 3 kgf / cm ² , a distance between the nozzle and the substrate of 185 mm, and a scan speed of 30 mm / sec.
Sandblasting was performed under the following conditions. Subsequently,
As shown in (e), secondary grinding by sandblasting was performed to remove unnecessary portions of the glass paste layer 3. In this secondary grinding, spherical glass beads were used as an abrasive, and sandblasting was performed under the same conditions as described above. Next, the mask 6 was removed with a stripping agent, and a pattern of the barrier 7 made of a glass paste was obtained on the substrate 1 as shown in (f), and then the barrier 7 was brought into close contact with the substrate through a firing step. As a result, a pattern was obtained in which the damage on the surface of the electrode 1 was extremely small and the edge line shape under the barrier 7 was good.

In the above embodiment, an example in which a barrier is formed on a substrate on which electrodes are formed has been described. However, the present invention can be similarly applied to a case in which a barrier is formed on a substrate on which electrodes are not provided. is there.

[0012]

As described above, the PD according to the present invention is
In the barrier formation method of P, a glass paste layer for a barrier is formed on a glass substrate, a mask for sandblasting is formed on the glass paste layer, and then a barrier is formed by sandblasting through the mask for sandblasting. In the method for forming a barrier of a plasma display panel, the primary grinding is performed with a strong grinding force, and then the secondary grinding is performed with a weak grinding force. After the glass paste is ground, 2
Next grinding reduces the damage on the lower surface and finish grinding of the remaining glass paste reduces damage to the lower surface during sandblasting, and forms a well-shaped barrier in a short time can do. Another advantage is that it is not necessary to use a protective film or the like that covers the electrodes and the like.

[Brief description of the drawings]

FIG. 1 is a first half process diagram showing an embodiment of a method for forming a barrier of a plasma display panel according to the present invention.

FIG. 2 is a process chart of the latter half following FIG. 1;

[Explanation of symbols]

 2 Glass substrate 3 Glass paste layer 6 Sand blast mask

Claims (1)

(57) [Claims] 1. A plasma display in which a glass paste layer for a barrier is formed on a glass substrate, a mask for sandblasting is formed on the glass paste layer, and a barrier is formed by sandblasting through the mask for sandblasting. A method for forming a barrier for a plasma display panel, comprising: performing primary grinding with a strong grinding force, followed by secondary grinding with a weak grinding force.