KR20080053759A - Plasma display panel and manufacturing method thereof - Google Patents

Abstract

A plasma display panel and a manufacturing method thereof are provided to fix an exhaust pipe to the plasma display panel through a low-temperature firing process and a simple exposure process. A front substrate(35) has bus electrodes, sustain electrodes, a dielectric, and a protective layer. A rear substrate(34) has address electrodes, a dielectric, barrier ribs, a phosphor layer, and an exhaust hole(37). An exhaust pipe(30) is bonded to the exhaust hole of the rear substrate by an adhesive material comprising thermosetting or photo curable polymer. The adhesive material comprises any one of an epoxy or acrylic UV curable resin, and an organic-inorganic hybrid compound composition.

Description

Plasma display panel and manufacturing method thereof {PLASMA DISPLAY PANEL AND MANUFACTURING METHOD THEREOF}

1 is a perspective view showing a conventional plasma display panel.

2 illustrates a plasma display panel including an exhaust pipe provided on a rear substrate.

3 is a cross-sectional view showing an exhaust pipe fixed on a rear substrate.

4 and 5 are cross-sectional views illustrating a plasma display panel including an exhaust pipe according to an exemplary embodiment of the present invention.

6 is a top view showing a plasma display panel including an exhaust pipe according to an embodiment of the present invention.

7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel including an exhaust pipe according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

30: exhaust pipe 31: pipe

32: junction 34: rear substrate

35 front substrate 36 coating material (hardened part)

37: exhaust hole

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display panel and a method of manufacturing the same, and more particularly, to a plasma display panel including an exhaust pipe for removing impurity gas in the plasma display panel and injecting a functional gas.

In general, when a plasma display panel (plasma display panel) is applied with an alternating current (DC) or a direct current (AC) voltage to the electrodes, gas discharge occurs between the electrodes, and at this time, phosphors by ultraviolet radiation emit light to display an image. A flat panel display element to display.

1 is a perspective view schematically showing a structure of a conventional AC type plasma display panel device. As illustrated, the plasma display panel is coupled in parallel with the front glass substrate 10, which is a display surface on which an image is displayed, and the rear glass substrate 20, which forms a rear surface, with a predetermined distance therebetween.

The front glass substrate 10 is made of a metal material and a sustain electrode (11, 12) for maintaining the light emission of the cell by mutual discharge in one pixel at the bottom, that is, transparent electrodes (11a, 12a) made of a transparent ITO material The sustain electrodes 11 and 12 provided with the bus electrodes 11b and 12b are formed in pairs. The sustain electrodes 11 and 12 form a wall charge, are held by the discharge sustain voltage, and are covered by the upper dielectric layer 13a which protects the electrode from ion bombardment during plasma discharge and serves as a diffusion preventing film. On the upper dielectric layer 13a, a protective layer 14 on which magnesium oxide (MgO) is deposited is formed to facilitate discharge conditions.

In the rear glass substrate 20, a plurality of discharge spaces, that is, stripe-type partition walls 21 for forming a cell are arranged in parallel with each other and an address discharge is performed at a portion that intersects with the sustain electrode 11. A plurality of address electrodes 22 are generated in parallel to the partition wall 21. In addition, a lower dielectric layer 13b is formed on an upper surface of the address electrode 22, and an upper surface of the lower dielectric layer 13 is formed by applying R, G, and B fluorescent layers 23 that emit visible light for image display during address discharge.

A conventional front glass substrate and a rear glass substrate having such a structure are sealed by frit glass to form a plasma display panel, and in order to increase discharge efficiency during plasma discharge inside the plasma display panel, helium (He), neon (Ne), and xenon ( Inert gas such as Xe) is injected.

Meanwhile, referring to a process of injecting an inert gas into the plasma display panel, first, an exhaust hole is formed in the front glass substrate or the rear glass substrate of the plasma display panel to forcibly exhaust the impurity gas existing therein, and has a constant degree of vacuum. The above-mentioned inert gas is injected in a state. At this time, when inert gas is injected while the impurity gas or air existing in the plasma display panel is not sufficiently exhausted, a large amount of impurity gas such as H ₂ O, H ₂ , O ₂ , CO, CO _2, etc. is present. When the plasma display panel is driven, the discharge start voltage characteristics, the driving voltage characteristics, and the luminance characteristics for the discharge start are adversely affected.

Therefore, in order to remove the impurity gas generated in such an exhaust process and various other processes, an exhaust hole is formed in the rear substrate of the plasma display panel, and the exhaust pipe is fixed to the exhaust hole.

2 illustrates a plasma display panel including an exhaust pipe provided on a rear substrate. Referring to FIG. 2, as described above, an exhaust pipe 17 used for exhausting impurity gas and injection of a functional discharge gas generated in an exhaust process and other processes is formed around the exhaust hole 16 of the rear substrate of the plasma display panel. It is fixed at.

3 is a cross-sectional view showing an exhaust pipe fixed on a rear substrate.

3A is a cross-sectional view of a plasma display panel showing a state before heat treatment, in which a front substrate 35 and a rear substrate 34 each having a functional layer formed therebetween are partitioned therebetween. As described above, in order to inject the functional gas between the two substrates 35 and 34, the functional gas must be injected after the impurity gas remaining between the two substrates 35 and 34 is first exhausted. The exhaust pipe 30 is installed to exhaust or inject gas remaining between the two substrates 35 and 34. In order to install the exhaust pipe 30, the cylindrical frit ring 33 is positioned around the junction 32 of the exhaust pipe 30 on the exhaust hole 37 of the rear substrate 34. The frit ring 33 has a cylindrical structure having an inner diameter equal to or slightly larger than the outer diameter of the exhaust pipe 30 and the junction 32.

3B is a cross-sectional view of the plasma display panel showing the state after the heat treatment, and the exhaust pipe 30 has a structure in which a funnel-shaped junction part 32 is integrally formed at one end. In the method of fixing the exhaust pipe 30 on the rear substrate 35, when the baking is performed at a temperature of about 450 ° C., the frit ring 20 is melted to serve as an adhesive, and the joint 32 of the exhaust pipe 30 is formed. ) Is attached to the rear substrate 35.

However, the frit ring 33 is a material in which a glass component and a binder are mixed, and when heated to a firing temperature, the binder is pyrolyzed to generate impurity gas, and the generated impurity gas serves as an internal pollution source of the plasma display panel. do. As the bubble-type impurity gas is generated in the fired frit ring 33, leakage may occur in the sealed joint.

In addition, the frit ring 33 has a problem that the viscosity is reduced in the molten state so that some of the frit ring flows into the exhaust hole 37 and is not blocked or uniformly attached around the exhaust pipe 32.

Therefore, the exhaust pipe 32 may be detached due to lack of support force, and the frit ring 33 has a thermal expansion coefficient that is 10 times or more than that of the glass substrate 35, so that cracks may occur during a process or a small impact after heating and exhausting. There is a problem of being easily broken or broken.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a plasma display panel including an exhaust pipe fixed on a glass substrate at a low firing temperature of 200 ° C. or less, and a method of manufacturing the same.

Another object of the present invention is to provide a plasma display panel including an exhaust pipe fixed on a glass substrate by a simple exposure process and a method of manufacturing the same.

Plasma display panel according to an embodiment of the present invention for achieving the above object, a bus electrode, a sustain electrode, a dielectric, a front substrate formed with a protective film, an address electrode, a dielectric, a partition, a fluorescent film, a rear substrate formed with an exhaust hole And an exhaust pipe fixed by an adhesive material containing a thermosetting or photocurable polymer on the exhaust hole of the rear substrate.

Here, the adhesive material is formed between the exhaust pipe and the rear substrate using at least one of an epoxy or acrylic UV curable resin, an organic-inorganic hybrid composite composition as a photocuring or thermosetting coating material, the exhaust pipe and the rear substrate Including the circumference of the joint to secure the exhaust pipe.

In this case, the adhesive material has a form surrounding the circumference of the exhaust pipe joint in a round shape, and has a form surrounding the circumference of the exhaust pipe joint with a thickness of 0.3 to 8 mm.

Method of manufacturing a plasma display panel according to an embodiment of the present invention for achieving the above object comprises the steps of preparing a front substrate having a bus electrode, a sustain electrode, a dielectric, a protective film formed on a glass substrate, the address electrode on the glass substrate Preparing a rear substrate on which a dielectric, a partition, a fluorescent film, and an exhaust hole are formed, fixing an exhaust pipe by an adhesive material on the exhaust hole of the rear substrate, and bonding the upper plate and the lower plate to the panel by sealing means. Forming, exhausting air in the panel, and injecting a discharge gas into the panel.

Here, the adhesive material is at least one of an epoxy-based or acrylic ultraviolet curable resin, an organic-inorganic hybrid composite composition.

In addition, the method of fixing the exhaust pipe is a thermosetting of the adhesive material using a firing furnace, the firing temperature of the firing furnace is 200 ℃ or less.

Another method of fixing the exhaust pipe is photocuring the adhesive material using an exposure machine, and exposure is performed using any one selected from a mercury lamp, a chemical lamp, a carbon arc lamp, a xenon lamp, a metal halide lamp and a tungsten lamp having a wavelength of 320 nm to 360 nm. Use one.

The hardening thickness of the adhesive material at this time is 0.3-8 mm.

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

4 and 5 are cross-sectional views showing a plasma display panel including an exhaust pipe according to an embodiment of the present invention, Figure 6 is a top view showing a plasma display panel including an exhaust pipe according to an embodiment of the present invention. 7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel including an exhaust pipe according to an embodiment of the present invention.

4 is a diagram illustrating a plasma display panel according to an embodiment of the present invention.

As shown in FIG. 4, a cross-sectional view showing the exhaust pipe 30 fixed on the rear substrate 34 includes a bus substrate, a sustain electrode, a dielectric, and a protective film in which a front substrate 35 and an address electrode and a dielectric are formed in this order. In the plasma display panel including a barrier rib, a fluorescent film, and a rear substrate 34 on which an exhaust hole 37 is formed, an adhesive material including a thermosetting or photocurable polymer on the exhaust hole 37 of the rear substrate 35. It includes an exhaust pipe 30 fixed by.

The exhaust pipe 30 is a structure in which the funnel-shaped junction part 32 and the tube 31 are integrally formed at an end thereof, and the junction part 32 has a structure in which a part joined on the rear substrate 34 is extended in a planar state. Have. The coating material 36 is formed along the circumference of the junction 32 of the exhaust pipe 30.

The adhesive material 36 is a photocuring or thermosetting coating material, using at least one of an epoxy-based or acrylic ultraviolet curable resin, an organic-inorganic hybrid composite composition.

The form in which the adhesive material 36 is fusion-hardened between the substrate 34 and the joint portion 32 of the exhaust pipe 30 has a shape as shown in the perspective view 41.

Here, the adhesive material 36 is applied to within 2cc, the cured thickness (t) is 0.3 to 8mm. The reason is that when the thickness t of the coating material 36 is less than 0.3 mm, the exhaust pipe 30 cannot be stably fixed to the substrate 34, and the thickness t of the coating material 36 may exceed 8 mm. In this case, the coating material 36 may flow into the exhaust hole 37 of the substrate 34 to block the exhaust hole 37 during the firing process.

Therefore, in the present invention, the low-temperature coating material 36 that can be thermally cured at a firing temperature of 200 ° C. or less is used, and the exhaust pipe 30 can be fixed onto the substrate 34 by a simple exposure process. The photocuring process by the firing and exposure process will be described in detail in one embodiment described below.

5 is a cross-sectional view illustrating a plasma display panel according to an embodiment of the present invention.

As shown in FIG. 5, a cross-sectional view of the exhaust pipe 30 fixed on the rear substrate 34 includes a bus substrate, a sustain electrode, a dielectric, and a protective film in which a front substrate 35 and an address electrode and a dielectric are formed in this order. In the plasma display panel including a barrier rib, a fluorescent film, and a rear substrate 34 on which an exhaust hole 37 is formed, an adhesive material including a thermosetting or photocurable polymer on the exhaust hole 37 of the rear substrate 35. It includes an exhaust pipe 30 fixed by.

The exhaust pipe 30 has a structure in which a funnel-shaped junction part 32 is integrally formed at an end thereof, and the junction part 32 has a structure in which a portion bonded to the rear substrate 34 is extended in a planar state. The adhesive material 36 is applied along the circumference of the junction 32 of the exhaust pipe 30 and is formed in a circumferential form surrounding a portion of the junction 32.

The adhesive material 36 is a photocuring or thermosetting coating material, using at least one of an epoxy-based or acrylic ultraviolet curable resin, an organic-inorganic hybrid composite composition.

The form in which the adhesive material 36 is fusion-hardened between the substrate 34 and the joint portion 32 of the exhaust pipe 30 has a circumferential shape partially surrounding the joint portion as shown in the perspective view 51.

Here, the adhesive material 36 is applied to within 2cc, the cured thickness (t) is 0.3 to 8mm. The reason is that when the thickness t of the coating material 36 is less than 0.3 mm, the exhaust pipe 30 cannot be stably fixed to the substrate 34, and the thickness t of the coating material 36 may exceed 8 mm. In this case, the coating material 36 flows into the exhaust hole 37 of the substrate 34 during the firing process, thereby blocking the exhaust hole 37.

Therefore, in the present invention, the adhesive material 36 capable of thermosetting at a firing temperature of 200 ° C. or less is used, and the exhaust pipe 30 can be fixed onto the substrate 34 by a simple exposure process. The photocuring process by the firing and exposure process will be described in detail in one embodiment described below.

FIG. 6 is a top view of the perspective views 41 and 51 shown in FIGS. 4 and 5 from above.

As shown in FIG. 6, the exhaust pipe 30 is fixed on the exhaust hole 37 formed in a predetermined portion of the rear surface substrate 34 of the plasma display panel (PDP). The pipe 31 is formed in a circumferential shape along the outer circumference of the exhaust pipe 30, and the joint 32 is formed in the circumferential shape along the outer circumference of the pipe 31. The adhesive material 36 is formed in a circumferential form along the outer circumference of the c.

The adhesive material 36 exhibits a structure formed along the circumferential shape of the junction part 32 by surrounding a part of the junction part between the substrate 34 and the junction part 32 of the exhaust pipe 30. The exhaust pipe 30 may be stably fixed to the plasma display panel (PDP) rear substrate 34 by curing or thermal curing.

7 is a schematic block diagram illustrating a method of manufacturing a plasma display panel according to an embodiment of the present invention.

As shown in FIG. 7, a method of manufacturing a plasma display panel according to the present invention includes a process of manufacturing a front substrate, which is a front panel listed on the right side of FIG. Assembly process including the listed sealing process and the like.

First, a manufacturing process of the front substrate listed on the right side of FIG. 7 will be described. The front substrate first prepares a glass substrate serving as a substrate, and then forms a bus electrode and a sustain electrode which become a plurality of sustain electrode pairs on the glass substrate in order. Next, an upper dielectric layer is formed on an upper surface of the sustain electrode pair, and a front substrate on which a protective layer made of magnesium oxide (Mgo) is formed to protect the sustain electrode pair is prepared (71).

Next, the manufacturing process of the rear substrate to be the rear panel listed on the left side of Figure 7 as follows. Like the front substrate, the rear substrate first prepares a glass substrate to be a substrate, and forms a plurality of address electrodes on the glass substrate so as to face and cross the sustain electrode pair formed on the front substrate. Subsequently, a lower substrate is formed on the upper surface of the address electrode, and a rear substrate on which a phosphor layer and an exhaust hole are sequentially formed on the upper surface of the lower dielectric layer is prepared (72).

Next, the exhaust pipe is fixed to the exhaust hole of the rear substrate by using an adhesive material (73).

Next, the front substrate and the rear substrate manufactured as described above are sealed to each other to form a plasma display panel (74).

Next, the gas or gas existing in the plasma display panel is completely exhausted by using a pump (75).

Subsequently, a discharge gas such as Xe, Ne, or Ar is injected into the plasma display panel through the exhaust pipe (76), and the manufacturing process of the plasma display panel is completed by melting and sealing an intermediate portion of the exhaust pipe using a torch.

Here, the method 73 for fixing the exhaust pipe is fixed by thermal curing using a kiln or photocuring using an exposure machine.

In the exhaust pipe fixing method using the kiln, first, the adhesive material used in the present invention is coated around the exhaust hole on the rear substrate. The exhaust pipe is fixed thereon and fixed by heat treatment in a kiln.

At this time, the firing temperature of the kiln can be thermally cured to 200 ° C or less. The thermosetting temperature is lower than that of the conventional frit method, and thus, low-temperature firing is possible, thereby preventing deformation and distortion of the organic substrate, which is a substrate of the rear substrate.

In the exhaust pipe fixing method using the exposure machine, first, the adhesive material used in the present invention is applied around the exhaust hole on the rear substrate. The exhaust pipe is placed on it and fixed by photocuring treatment using an exposure machine.

Here, the exposure uses any one selected from a mercury lamp, a chemical lamp, a carbon arc lamp, a xenon lamp, a metal halide lamp, and a tungsten lamp having a wavelength of 320 nm to 360 nm.

The exhaust pipe fixing method using the exposure process provides a simpler exhaust pipe fixing method and does not need to apply high-temperature heat to the glass substrate serving as the substrate, thereby fixing the exhaust pipe on the rear substrate in a simpler process.

The adhesive material used in the above-mentioned fixing method is a thermosetting or photocuring coating material, and at least one of an epoxy-based, acrylic-based UV curable resin and an organic-inorganic hybrid composite composition having a high viscosity liquid form.

The adhesive material can be prescribed at a low temperature of 200 ° C. or lower and at the same time enables a photocuring process, and has a viscosity of 150 mPa · s or more. Therefore, the adhesive material does not flow into the exhaust hole even during the firing and exposure process so as not to block the exhaust hole. The curing thickness of the coating material is 0.3 ~ 8mm, which means that when the thickness (t) of the coating material is less than 0.3 mm, the exhaust pipe cannot be stably fixed to the rear substrate, and when the thickness (t) of the coating material is more than 8 mm This is because even if the viscosity is high, the coating material may flow into the exhaust hole of the substrate and the exhaust hole may be blocked.

The above embodiment is an example for explaining the technical idea of the present invention in detail, and the present invention is not limited to the above embodiment, various modifications and combinations are possible, and various embodiments of the technical idea are all present invention Naturally, it belongs to the protection scope of.

As described above, the plasma display panel and the method of manufacturing the same according to the present invention can stably fix the exhaust pipe to the plasma display panel by a low-temperature firing process and a simple exposure process, and solve the problem of departure of the exhaust pipe that may occur during the post process. The solution can be solved, and the reliability of the plasma display panel can be improved.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

Claims (13)

A front substrate on which a bus electrode, a sustain electrode, a dielectric, and a protective film are formed; A rear substrate having an address electrode, a dielectric, a partition, a fluorescent film, and an exhaust hole; And And an exhaust pipe fixed to an exhaust hole of the rear substrate by an adhesive material containing a thermosetting or photocurable polymer. The method of claim 1, wherein the adhesive material, A plasma display panel comprising at least one of an epoxy-based or acrylic ultraviolet-curable resin and an organic-inorganic hybrid composite composition. The method of claim 1, wherein the adhesive material, And a plasma display panel formed between the rear substrate and the exhaust pipe. The method of claim 1, wherein the adhesive material, And a circumference of the exhaust pipe and the rear substrate junction to fix the exhaust pipe. The method of claim 1, wherein the adhesive material, And a circumference of the exhaust pipe junction in a round shape. The method of claim 5, wherein the bonding material, And a circumference of 0.3 to 8 mm around the exhaust pipe junction. Preparing a front substrate on which a bus electrode, a sustain electrode, a dielectric, and a protective film are formed on a glass substrate; Preparing a rear substrate having an address electrode, a dielectric, a partition, a fluorescent film, and an exhaust hole on a glass substrate; Fixing the exhaust pipe by an adhesive material including a thermosetting or photocurable polymer on an exhaust hole of the rear substrate; Bonding the upper plate and the lower plate by sealing means to form a panel; Evacuating air inside the panel; And Injecting a discharge gas into the panel; and manufacturing a plasma display panel. The method of claim 7, wherein the bonding material, A method of manufacturing a plasma display panel using at least one of an epoxy-based or acrylic ultraviolet-curable resin and an organic-inorganic hybrid composite composition. The method of claim 7, wherein the method for fixing the exhaust pipe, A method of manufacturing a plasma display panel, wherein the bonding material is thermally cured using a firing furnace. The method of claim 9, wherein the firing temperature of the firing furnace, A method of manufacturing a plasma display panel, which is 200 ° C. or less. The method of claim 7, wherein the method for fixing the exhaust pipe, A method of manufacturing a plasma display panel, wherein the bonding material is photocured using an exposure machine. The method of claim 11, wherein the exposure, A method of manufacturing a plasma display panel comprising any one selected from a mercury lamp, a chemical lamp, a carbon arc lamp, a xenon lamp, a metal halide lamp, and a tungsten lamp having a wavelength of 320 nm to 360 nm. The method according to claim 9 or 11, The hardening thickness of the said bonding material is 0.3-8 mm, The manufacturing method of the plasma display panel characterized by the above-mentioned.

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