KR20060065009A - Electrode Formation Method of Display Device - Google Patents

Abstract

The present invention relates to an electrode forming method of a display device. The present invention forms the electrode 60 on the substrate 60 by using the elastic mold 30 formed of the intaglio pattern 32 composed of the pattern recess 33 and the pattern protrusion 34. In the method, the first step of supplying the electrode material 50 'to the intaglio pattern 32 of the elastic mold 30, and on the surface of the pattern protrusions 34 protruding relatively from the intaglio pattern 32 A second step of removing the existing electrode material 50 ', a third step of transferring the electrode material 50' in the pattern recess 33 of the intaglio pattern 32 to the substrate 60, and the substrate And a fourth step of drying and firing the electrode material 50 'transferred to 60. According to the electrode forming method of the display device according to the present invention having such a configuration, the productivity of the display device is relatively high, the manufacturing cost is relatively low, and there is an advantage of minimizing environmental pollution.

Display device, electrode

Description

Electrode patterning method of display device

Figure 1a is an exploded perspective view showing the configuration of a typical plasma display panel.

1B is a cross-sectional view illustrating a main part of a general plasma display panel.

2A to 2C are cross-sectional views sequentially illustrating an electrode forming process of a display panel according to the related art.

3A to 3F are cross-sectional views sequentially showing a process of a preferred embodiment of the electrode forming method of the display device according to the present invention.

Figure 4 is a flow chart showing the process of the embodiment of the present invention sequentially.

Figure 5 is a cross-sectional view showing an elastic mold and a mold roll used in another embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

30: elastic mold 31: mold plate

32: engraving pattern 33: pattern

34: pattern convex part 40: material supply part

50 ': electrode material 50: electrode

60: substrate

The present invention relates to a display device, and more particularly, to an electrode forming method of a display device for forming an electrode on a substrate constituting the display device.

Recently, display devices have become large and thin. As such a large area and thin display device, a liquid crystal display (LCD), a plasma display panel (PDP), an organic EL (Electro Luminescent) and a field emission display (LCD) are used.

Among these display devices, the plasma display panel discharges an inert gas such as neon (Ne), helium (He), xenon (Xe), etc. between two panels facing each other, and the ultraviolet rays generated during the discharge excite the phosphor. It is to perform the screen display. The plasma display panel is actively developing technologies as a display device having an advantage that is most suitable for large size.

The configuration of the plasma display panel is shown in exploded perspective view in FIG. 1A, and the basic cell structure of the plasma display panel is shown in sectional view in FIG. 1B.

As shown in these figures, the plasma display panel is largely composed of a top panel 10 and a bottom panel 20. The top panel 10 and the bottom panel 20 are bonded to each other to form top and bottom surfaces of the plasma display panel, respectively.                         

Looking at the configuration of the top panel 10, the auxiliary electrode 12 and the transparent electrode 13 is formed on the lower surface of the upper substrate (11). The dielectric layer 14 is formed on the lower surface of the upper substrate 11 including the auxiliary electrode 12 and the transparent electrode 13. The dielectric layer 14 is protected by a protective film 15. That is, the protective film 15 is coated on the entire surface of the dielectric layer 14. The protective film 15 is formed of phosphorus oxide (ITO).

In the lower panel 20, an address electrode 22 is formed on an upper surface of the lower substrate 21. The dielectric layer 23 is formed on the upper surface of the lower substrate 21 including the address electrode 22. A plurality of partitions 24 are formed on the dielectric layer 23 in a straight line at a predetermined interval. Phosphor 25 having red (R), green (G), and blue (B) alternately divided between the barrier ribs 24 and the upper surface of the dielectric 23 is coated.

When the upper panel 10 and the lower panel 20 respectively configured as described above are attached to each other with a predetermined gap, the plasma display panel is completed. Of course, the inert gas discharge gas is enclosed between the upper panel 10 and the lower panel 20.

In the plasma display panel configured as described above, the phosphor 25 coated inside the discharge space formed by the partition wall 24 is excited by ultraviolet rays at the time of discharge of each cell to emit visible light to the outside of the upper panel 10. . Thus, image information is displayed on the plasma display panel.

Meanwhile, electrodes 13 and 22 are formed on the substrates 11 and 21, respectively, and the electrodes 13 and 22 are formed through a screen printing process as shown in FIGS. 2A to 2C. That is, the electrode paste p is applied to the entire one surface of the substrates 11 and 21. The state in which the electrode paste p is applied to the entire one surface of the substrates 11 and 21 is illustrated in FIG. 2A.

Next, exposure and development are performed in order using a photomask m having a predetermined pattern shape. FIG. 2B shows an exposure process in which light is selectively irradiated onto the paste p using the photomask m. After exposure and development, the electrodes 13 and 22 having the desired width and height are completed by drying and firing. This state is shown in FIG. 2C.

However, the screen printing process according to the prior art as described above has the following problems.

That is, in order to form the electrodes 13 and 22 by using the screen printing process, since the exposure and development processes must be performed while the paste p is applied to the substrates 11 and 21, the number of processes is large. 22) there is a problem that the formation process is very complicated.

After the paste p, which is a material for forming the electrodes 13 and 22, is applied to the entire one surface of the substrates 11 and 21, a part of the paste is selectively removed through the exposure and development processes. Here, the paste (p) removed during the exposure and development process is all discarded, there is a concern of environmental pollution, there is a problem that a lot of cost for the treatment.

In addition, in order to form the electrodes 13 and 22 by selectively removing the paste p through exposure and developing processes, an expensive photosensitive material has to be used, thereby increasing the manufacturing cost.

 Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to simplify the formation of the electrodes of the panel constituting the display device.

Another object of the present invention is to minimize the loss of material forming the electrodes of the panel in the display device.

Another object of the present invention is to use a relatively low cost material for forming the electrode of the panel in the display device.

Another object of the present invention is to minimize the material discarded in the process of forming the electrode.

According to a feature of the present invention for achieving the above object, the present invention is a method for forming an electrode on a substrate using an elastic mold formed in a negative pattern consisting of a pattern recess and a pattern protrusion, A first step of supplying electrode material to the intaglio pattern of the elastic mold, a second step of removing electrode material on a relatively protruding pattern protrusion surface of the intaglio pattern, and an electrode material of the pattern recess of the intaglio pattern And a fourth step of drying and firing the electrode material transferred to the substrate.

The elastic mold has an area corresponding to that of the substrate, and is attached to the plate-shaped mold flat plate and uniformly pressed.

The elastic mold has an area corresponding to that of the substrate and is uniformly pressurized by being attached to a cylindrical or cylindrical mold roll.

The elastic mold is composed of a silicone rubber, preferably formed by mixing about 90 wt% of the silicone rubber and about 10 wt% of the curing agent, and secures releasability through surface treatment.

In the step of removing the electrode material on the surface of the pattern protrusion, the electrode material is first removed and recycled using a remover, and the electrode material remaining finely on the surface of the pattern protrusion is removed using a secondly adhesive tape or film. do.

The adhesive tape or film is formed by forming a polymer adhesive layer on a base material.

The electrode material uses either a photosensitive or non-photosensitive material.

According to the electrode forming method of the display device according to the present invention having such a configuration, the productivity of the display device is relatively high, the manufacturing cost is relatively low, and there is an advantage of minimizing environmental pollution.

Hereinafter, a preferred embodiment of an electrode forming method of a display device according to the present invention will be described in detail with reference to the accompanying drawings.

3A to 3F sequentially show the process of the preferred embodiment of the electrode forming method of the display device according to the present invention, and FIG. 4 shows the process of the embodiment of the present invention in a flow chart.

As shown in these figures, the elastic mold 30 is formed with an intaglio pattern 32 on one surface thereof. The intaglio pattern 32 is formed to be opposite to the shape of the electrode 50 to be described below. The relatively recessed portion is called the pattern recess 33 and the relatively protruding portion is called the pattern convex portion 34. . In the pattern recess 33, an electrode material 50 ′, which is a material for forming the electrode 50, is positioned.

The elastic mold 30 has a predetermined elasticity, and is formed of silicon rubber as a main material. More specifically, the elastic mold 30 is formed by mixing about 90 wt% of the silicone rubber and about 10 wt% of the curing agent. The curing agent is to allow the silicone rubber to cure quickly in the manufacture of the elastic mold (30). The silicone rubber in which the curing agent is mixed is made into an elastic mold 30 in a molten state and cured by standing at a temperature of 30 to 70 ° C. for 1 to 24 hours. The surface of the elastic mold 30 manufactured as described above is preferably subjected to a separate pretreatment so as to have chemical resistance and wear resistance through chemical treatment after cleaning. Through such chemical treatment, the releasability of the electrode material 50 ′ may be more easily transmitted from the pattern recess 33 to the substrate 60.

The elastic mold 30 is attached on the mold flat plate 31. The elastic mold 30 is formed to have an area corresponding to that of the substrate 60, and the mold flat plate 31 is also the same. The mold plate 31 has a higher hardness than the elastic mold 30 so that a uniform pressure may be applied to the entire elastic mold 30.

In the state where the elastic mold 30 is attached to the mold flat plate 31 as described above, the electrode material 50 ′ is supplied to the intaglio pattern 32 of the elastic mold 30. That is, the electrode material 50 'is coated on the material supply part 40, and as shown in FIG. 3A, the mold plate 31 to which the elastic mold 30 is attached is coated with the electrode material 50'. Located on the material supply portion 40.                     

Here, the electrode material 50 ′ may use photosensitive or non-photosensitive. In general, the use of non-photosensitive materials is advantageous in terms of cost. The electrode material 50 ′ should have a viscosity of about 20,000 psi to be stably seated on the pattern recess 33 of the intaglio pattern 32.

Then, as shown in FIG. 3B, the mold flat plate 31 to which the elastic mold 30 is attached is pressed onto the material supply part 40. The electrode material 50 ′ on the material supply part 40 is supplied to the intaglio pattern 32 of the elastic mold 30. In particular, the pattern plate portion 34 of the intaglio pattern 32 of the elastic mold 30 is slightly elastically deformed and compressed by pressing the mold flat plate 31, so that the electrode material 50 ′ is uniformly formed on the entire pattern recess 33. S10.

As described above, when the electrode material 50 ′ is supplied to the intaglio pattern 32 of the elastic mold 30, the elastic mold 30 is separated from the material supply part 40. In this case, the electrode material 50 ′ is present in the pattern recess 33 and the pattern convex portion 34 of the intaglio pattern 32. However, the electrode material 50 'coated on the pattern convex portion 34 should be removed.

Various methods may be used to remove the electrode material 50 ′ on the surface of the pattern convex portion 34. For example, a remover (not shown) made of a rubber bar having a width at least equal to one side width of the elastic mold 30 may be used. That is, the remover is brought into close contact with the surface of the pattern convex portion 34 to remove the electrode material 50 'on the surface of the pattern convex portion 34. (S20) For reference, the electrode removed by the remover Material 50 'is collected separately for use in subsequent processes.

Then, the electrode material 50 'remaining fine on the surface of the pattern convex portion 34 is removed by using an adhesive tape or film. That is, the adhesive tape or film is uniformly pressed on the surface of the pattern convex portion 34 to selectively remove only the electrode material 50 ′ attached to the surface of the pattern convex portion 34. The adhesive tape and film is a form in which a polymer adhesive layer is formed on a base material.

The state in which the electrode material 50 'is removed from the surface of the pattern convex portion 34 is shown in FIG. 3D. In order to form the electrode 50 on the substrate 60, as shown in FIG. 3D, the electrode material 50 ′ on the surface of the pattern convex portion 34 is removed from the elastic mold 30. Allow substrate 60 to be positioned.

Next, the intaglio pattern 32 of the elastic mold 30 is placed on the surface of the substrate 60 and pressed. This state is illustrated in FIG. 3E. Pressure is applied to the mold flat plate 31 so that the elastic mold 30 is pressed onto the substrate 60. The mold plate 31 evenly transmits the pressure to the entire elastic mold 30 so that the pattern convex portion 34 of the intaglio pattern 32 is slightly compressed, and thus the electrode material 50 ' ) Is transferred onto the substrate 60. (S30)

At this time, the electrode material 50 ′ in the pattern recess 33 is separated from the pattern recess 33 having a relatively good releasability, and transferred to the substrate 60. In particular, the elastic mold 30 may be compressed. Silicone oil plays a role in promoting release. The silicon oil is contained in the silicon rubber, which is a material of the elastic mold 30, and when a predetermined pressure is applied to the silicon oil, the silicon oil comes out of the surface to easily separate the electrode material 50 'from the pattern recess 33.                     

Next, in the state where the electrode material 50 'is transferred onto the substrate 60, drying and baking are performed to form the electrode 50. (S40) Thus, the electrode 50 on the substrate 60 is formed. This formed state is shown in FIG. 3F. After the drying of the electrode 50 is completed, the operation of forming the electrode 50 on the substrate 60 is completed.

On the other hand, Figure 5 shows another embodiment of the present invention. For convenience of description, those not shown in FIG. 5 will be described using reference numerals of FIG. 3. In this embodiment, the elastic mold 130 is attached to the surface of the cylindrical or cylindrical mold roll 131. In this embodiment, in the state in which the elastic mold 130 is attached to the mold roll 131 as described above, the mold roll 131 is rolled along the surface of the material supply part while the intaglio formed of the pattern recess 133 and the pattern convex part 134. It supplies to the pattern 132.

Then, in order to transfer the electrode material 50 'in the pattern recess 133 to the substrate 60, the mold roll 131 is pressed against the surface of the substrate 60 at a predetermined pressure to make a rolling contact. Of course, in the case of this embodiment, the operation proceeds in the order as shown in FIG. 3, the elastic mold 30 is attached to the plate-shaped mold plate 31, and in this embodiment, the elastic mold 130 is attached to the cylindrical or cylindrical mold roll 131. The difference is.

The rights of the present invention are not limited to the embodiments described above, but are defined by the claims, and those skilled in the art can make various modifications and adaptations within the scope of the claims. It is self-evident.

 In the electrode forming method of the display device according to the present invention as described in detail above, the following effects can be obtained.

First, in the present invention, in forming the electrode of the panel constituting the display device, the electrode-like electrode material is transferred to the substrate at a time, so that the labor for forming the electrode is relatively reduced. Therefore, there is an effect that the productivity of the substrate on which the electrode used in the display device is formed is relatively increased.

In the present invention, the electrode material transferred from the material supply part to the intaglio pattern of the elastic mold is attached to the pattern convex part in advance to be recycled. Therefore, the amount of electrode material required to form the electrode is relatively reduced, thereby reducing the manufacturing cost of the display device.

In the present invention, it is not necessary to use a photosensitive material as the electrode material. Therefore, the use of a relatively inexpensive non-photosensitive material as compared to the photosensitive material has the effect of lowering the manufacturing cost of the display device.

On the other hand, the present invention can minimize the amount of the electrode material is discarded in the process of forming the electrode, there is an effect that can reduce the environmental pollution.

Claims (7)

In the method of forming an electrode on a substrate using an elastic mold formed in a negative pattern consisting of a pattern recess and a pattern protrusion, Supplying an electrode material to the intaglio pattern of the elastic mold; A second step of removing the electrode material on the surface of the pattern protrusion protruding relatively from the intaglio pattern; A third step of transferring the electrode material in the pattern recess of the intaglio pattern to a substrate; And a fourth step of drying and firing the electrode material transferred to the substrate. The method of claim 1, wherein the elastic mold has an area corresponding to the substrate and is uniformly pressed by being attached to a plate-shaped mold flat plate. The method of claim 1, wherein the elastic mold has an area corresponding to that of the substrate and is uniformly pressed by being attached to a cylindrical or cylindrical mold roll. The method of claim 2 or 3, wherein the elastic mold is composed of a silicone rubber, preferably formed by mixing about 90wt% of the silicone rubber and about 10wt% of the curing agent, and ensures releasability through surface treatment. An electrode forming method of a display device. The method of claim 1, wherein in the step of removing the electrode material on the surface of the pattern protrusion, the electrode material is first removed and recycled using a remover, and the surface of the pattern protrusion is finely formed using an adhesive tape or film. The electrode forming method of the display device, characterized in that for removing the remaining electrode material. The method of claim 5, wherein the adhesive tape or film is formed by forming a polymer adhesive layer on the base material. The method of claim 1, wherein the electrode material is any one of photosensitive and non-photosensitive materials.

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