KR100694494B1 - Method for manufacturing plasma display panel - Google Patents

Abstract

A method for fabricating a plasma display panel is provided to easily introduce discharge gas in a panel through a discharge gas introducing pipe which is fixed to a lower portion of a panel. An upper substrate with a first through-hole and a lower substrate with a second through-hole are prepared(S1). A discharge gas introducing pipe and a vent pipe are formed(S2). The upper board and the lower board are aligned, and the discharge gas introducing pipe is fixed to the first through-hole and the vent pipe is fixed to the second through-hole(S3). After the panels are put in a vacuum chamber, and the upper panel and the lower panel are sealed by pumping out air from an interior of the panels(S4). An impurity gas is discharged from the panel, and a tip portion of the vent pipe is sealed(S5). After the panel is transferred to an atmosphere furnace(S6), a discharge gas is introduced in the panel(S7).

Description

Method for manufacturing plasma display panel {Method for Manufacturing Plasma Display Panel}

1 is a view showing a process of a method of manufacturing a plasma display panel according to the present invention;

2 to 9 are diagrams showing a process model for explaining each process according to the manufacturing method of the present invention.

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

10: vacuum chamber 11: top plate

12: lower plate 12a: first hole

12b: Second Announcement 13: Clip

14: frit glass 20: discharge gas injection tube

21: tube body 22: barrier film

23: discharge gas 24: metal

25: heating device 30: exhaust pipe

31: sealing heater 42: frit glass

43: metal 44: sealing heater

45: piston

The present invention relates to a method of manufacturing a plasma display panel, and more particularly, to discharge a discharge gas into a panel without a gas injection device by sealing a discharge gas injection tube into which a discharge gas is injected. The present invention relates to a method of manufacturing a plasma display panel which can significantly reduce the time required for the entire process while simplifying the process.

In general, a manufacturing process of a plasma display panel includes a pre-process of forming an electrode, a phosphor, and the like on a pair of front and back plates processed to a desired screen size, and the above-described process. The process includes a step of sealing the manufactured front plate and the back plate and injecting gas in a vacuumed state, and a module process of mounting a circuit on the surface of the plywood panel.

By the way, in the post-process of the entire PDP manufacturing process as described above, the sealed exhaust process takes a long time (more than 2 hours for sealing, 14 hours or more for sealing) due to the low conductivity of the characteristics, and thus increases the PDP productivity. It is pointed out as the biggest obstacle and high defect rate is urgently required to improve the process and equipment.

As one of the methods for solving the above problems, a method of manufacturing a PDP in a vacuum chamber using a vacuum chamber apparatus has been proposed as an alternative. The vacuum sealing apparatus is first evacuated in a vacuum chamber. As the sealing is performed, since the exhausting step is preceded by the sealing step, the exhausting time is drastically shortened, which can greatly improve the productivity of the PDP.

As a related technology, the applicant of the present invention, in the 'plasma display panel and its manufacturing method' of the Patent Publication No. 10-2003-23695, the post-process related to the bonding of the front plate and the back plate, in the vacuum chamber It has been proposed a PDP manufacturing process that focuses on reducing the process time by performing a pre-exhaust and post-sealing process and performing a cooling process for complete sealing at atmospheric pressure.

However, in the method of manufacturing a plasma display panel applied during the process of the above technique, first, in order to inject discharge gas into the panel, the panel is evacuated and sealed in the vacuum chamber, and then taken out of the vacuum chamber, and separately. The gas injection device is connected to the tip of the injection pipe to inject the discharge gas into the panel and then separate the gas injection device from the injection pipe. The connection and disconnection of the gas injection device is not only cumbersome and complicated, but also requires a considerable amount of time, resulting in a decrease in productivity. Secondly, the above manufacturing method has a circumference between the front plate and the rear plate in the vacuum chamber. The fritglass gradually solidifies after most of the impurities in the panel are exhausted through the frit glass gap. At the time of sealing completion when the gap is filled and airtightness is maintained in the panel, since the tip portion of the injection tube has a closed structure, the trace impurities are generated from the frit glass and remain in the panel. As for practically, external discharge is difficult, the quality of the final product was deteriorated.

The present invention has been made to solve the above conventional problems, the object is to seal the discharge gas injection tube in which the discharge gas is injected in the lower part of the panel, the discharge gas in the interior of the panel by the discharge gas injection tube Method of manufacturing a plasma display panel that can improve productivity by significantly reducing the time required for the entire process while simplifying the process by simply injecting a gas injection device for injecting discharge gas by simply injecting In providing.

Another object of the present invention is to manufacture a plasma display panel that can improve the quality of the final product by improving the degree of vacuum inside the panel by finally discharging a small amount of impurity gas remaining inside the panel to the outside of the panel. In providing.

Method for manufacturing a plasma display panel according to the present invention for achieving the above object is to form a top plate and a bottom plate to be used in the plasma display panel, respectively, the lower plate is a small amount generated inside the panel and the first through hole for injecting discharge gas An upper plate and a lower plate forming process (S1) for separately forming a second through hole for exhausting impurity gas of S; A tube body having an outer wall of which the upper part is opened and the lower part of the tube body is closed, a barrier film formed to block the flow of fluid at one point inside the tube body, a discharge gas filled in the lower portion of the barrier film, and A step (S2) of forming a discharge gas injection tube made of a metal substance inserted into the center portion, and forming an exhaust tube made of a tube body whose upper and lower portions are open; The upper plate and the lower plate formed in the step (S1) are superimposed and aligned under normal pressure, and the edges are pressed and fixed with a clip to be bonded to a single panel, and the discharge gas injection pipe formed in the step (S2) is first mounted. An alignment and clipping process of fixing the through hole and fixing the exhaust pipe to the second through hole (S3); The panel clipped in the step (S3) is introduced into a vacuum chamber, and then while the panel is heated under vacuum, the gas inside the panel is evacuated through a gap of the frit glass for sealing the upper plate and the lower plate, and then pressurized. An exhaust and sealing step of sealing and heat-sealing the discharge gas injection pipe and the exhaust pipe by using frit glass in the first and second through holes respectively formed near the lower end of the lower plate; A first tip-off step (S5) of sealing the tip of the exhaust pipe after the impurity gas remaining inside the panel is discharged from the inside of the panel to the outside in the step (S4); A transfer step (S6) of taking out the panel in which the tip portion of the exhaust pipe is sealed in the vacuum chamber in the step (S5) and transferring it to the atmospheric pressure furnace; A discharge gas injection step (S7) of heating the metal to open the blocking film by using a heating apparatus attached to the outer circumference of the discharge gas injection tube in an atmospheric pressure state, so that the discharge gas is injected into the panel; And a secondary tip off step (S8) of sealing the tip of the discharge gas inlet tube (S8).

Here, it is preferable that an atmospheric heating step is further added between the step (S3) and step (S4) to raise the panel to 300 to 350 ° C primarily under normal pressure.

In addition, the method for manufacturing a plasma display panel according to the present invention forms a top plate and a bottom plate to be used in the plasma display panel, respectively, wherein the bottom plate exhausts a small amount of impurity gas generated inside the panel and the first through hole for injecting discharge gas. An upper plate and a lower plate forming process (S1) for forming a second through hole separately for each; A tube body having an outer wall of which the upper part is opened and the lower part of the tube body is closed, a barrier film formed to block the flow of fluid at one point inside the tube body, a discharge gas filled in the lower portion of the barrier film, and Forming a discharge gas injection tube made of a metal substance inserted into a central portion (S2); The upper plate and the lower plate formed in the step (S1) are superimposed and aligned under normal pressure, and the edges are pressed and fixed with a clip to be bonded to a single panel, and the discharge gas injection pipe formed in the step (S2) is first mounted. Alignment and clipping process (S3) to fix the through-holes; The panel clipped in the step (S3) is introduced into a vacuum chamber, and then while the panel is heated under vacuum, the gas inside the panel is evacuated through a gap of the frit glass for sealing the upper plate and the lower plate, and then pressurized. An exhaust and sealing step of sealing and heating sealing the discharge gas injection tube by using frit glass in the first through hole formed near the lower end of the lower plate (S4); A sealing step (S5) of sealing the second through hole in the lower plate after the impurity gas remaining inside the panel is discharged from the inside of the panel to the outside in the step (S4); A transfer step (S6) of taking out the panel in which the second through-hole is closed in the step (S5) from the vacuum chamber and transferring it to the normal pressure furnace; A discharge gas injection step (S7) of heating the metal to open the blocking film by using a heating apparatus attached to the outer circumference of the discharge gas injection tube in an atmospheric pressure state, so that the discharge gas is injected into the panel; And a tip off step (S8) of sealing the tip of the discharge gas inlet tube (S8).

Here, the step of sealing the second through hole, the metal with frit glass coated on the upper side is attached to the second through hole, the frit glass located between the second through hole and the metal by melting the heater for sealing the The metal is to seal the second through hole, the heater is preferably lifted by the piston.

Hereinafter, a method of manufacturing a plasma display panel according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a process of the manufacturing method of the plasma display panel according to the present invention, Figures 2 to 9 is a process model for explaining each process according to the manufacturing method of the present invention shown in FIG. One drawing.

First, the manufacturing method of the plasma display panel according to the present invention, as shown in Figure 1, the upper and lower plate forming step (S1), the discharge gas injection pipe and exhaust pipe forming step (S2), alignment and clipping process (S3), exhaust And a sealing step (S4), a first tip off step (S5), an atmospheric pressure furnace transfer step (S6), a discharge gas injection step (S7), and a second tip off step (S8). .

First, the upper plate and the lower plate forming step (S1) is to form a top plate 11 and a lower plate 12 to be used in the plasma display panel, respectively, as shown in Figure 2, the lower plate 12 for injecting a discharge gas One through hole 12a and a second through hole 12b for exhausting a small amount of impurity gas generated inside the panel are separately formed, and an upper plate 11 and a lower plate 12 are formed around an edge of the lower plate 12. Frit glass 14 having a low melting point property for sealing is applied.

In addition, in the process of forming the discharge gas injection pipe and the exhaust pipe (S2), as shown in FIG. 3, the discharge gas injection pipe 20 attached to the first through hole 12a formed near the lower one end of the lower plate 12. ) And an exhaust pipe 30 for attaching to the second through hole 12b.

The discharge gas injection pipe 20 is a tube body 21 having an outer wall of which the upper part is open and the lower part is closed, and a blocking film formed to block the flow of fluid at one point inside the tube body 21 ( 22, a discharge gas 23 filled in the lower portion of the blocking film 22, and a metal material 24 inserted into a central portion of the blocking film 22, and the exhaust pipe 30 has an upper portion and a lower portion. It consists of an open tube.

Next, in the alignment and clipping process (S3), as shown in FIG. 3, the upper plate 11 and the lower plate 12 formed in the upper plate and the lower plate forming step S1 overlap and align under normal pressure, and the edge part is clipped. Pressing and fixing by means of the fixing means as shown in (13) to be bonded to one panel, and the discharge gas injection pipe 20 formed in the step (S2) is fixed to the first through hole (12a) side, the exhaust pipe (30) To the second through hole (12b) side.

As a next step, the evacuation and encapsulation step S4 is carried out by placing the panel clipped in the alignment and clipping process S3 into the vacuum chamber 10 as shown in Fig. 4, and then heating the panel under vacuum. The gas inside the panel is evacuated through a gap of the frit glass 14 for sealing the upper plate 11 and the lower plate 12, and then pressurized and sealed, and the discharge gas injection pipe 20 and the exhaust pipe ( 30 is heat-sealed using frit glass in the first through hole 12a and the second through hole 12b formed near the lower end of the lower plate 12, respectively.

The heating of the panel in the step (S4) is for melting the frit glass 14 located between the upper plate 11 and the lower plate 12 to fuse the upper plate 11 and the lower plate 12, the exhaust process The process proceeds through a minute gap formed between the surface curved surface of the frit glass 14 before the complete fusion and the upper plate 11 and the lower plate 12 in contact with the frit glass 14, and after the vacuum exhaust process is completed, the upper plate ( 11) and the lower plate 12 is pressed to seal in a vacuum state.

On the other hand, the heating for sealing the panel in the step (S4) is typically performed until the temperature reaches approximately 450 ℃, in order to shorten the heating time of the panel and to minimize the temperature non-uniformity acting on the panel Some heating sections may be performed at atmospheric pressure instead of inside the vacuum chamber 10, in which case, the heating is performed until the temperature reaches 300 to 350 ° C. The reason for performing the atmospheric heating process up to 300-350 ° C. is that the degassing of moisture and impurity gas adsorbed inside the panel is most smoothly near this temperature range, so that the exhaust is concentrated, thereby improving the exhaust characteristics by the atmospheric pressure environment. Therefore, the temperature of the panel is increased under normal pressure, in which the temperature characteristic of the panel is shown as a small deviation of about 10 ° C./min based on a temperature increase of ± 5 ° C., thereby increasing the gas activity inside the panel, and then in the vacuum chamber for a predetermined time. It maintains the vacuum state at, and can be heated to elevated temperature to high vacuum inside the panel in a shorter time than before.

In the step S4, the gas inside the panel is exhausted and the inside of the panel where the sealing is completed is maintained in a sealed state that is blocked from the outside of the panel. However, the frit glass 14 located between the upper plate 11 and the lower plate 12 is heated up to a certain point even after the sealing is made and a small amount of impurity gas is generated during the solidification process. The impurity gas generated at the outer position (b) does not affect the degree of vacuum inside the panel. However, when such an impurity gas is generated at the inner position (a) of the panel, the inside of the panel is sealed off from the outside. As a result, the impurity gas is not discharged to the outside and remains inside the panel, thereby reducing the degree of vacuum inside the panel.

Therefore, the trace of residual impurities in the panel generated during heating and solidification of the frit glass 14 through the open tip of the exhaust pipe 30 so as to prevent the vacuum degree inside the panel as described above is reduced by the arrow of FIG. 4. By discharging to the outside as shown in the above, the degree of vacuum inside the panel is further improved, thereby further improving the quality of the finished final product.

After the exhaust of the residual impurity gas, the exhaust pipe for sealing the open tip of the exhaust pipe 30 by heating the circumference of the tip of the exhaust pipe 30 by using a heating device such as a heater 31 for encapsulating the coil. After the first tip-off step (S5) of (30) is made, it proceeds to the atmospheric pressure transfer step (S6) to take out the panel from the vacuum chamber 10 and put it into the normal pressure furnace.

Next, the discharge gas injection step (S7) is heated to the metal material 24 using a heating device 25 attached to the outer periphery of the discharge gas injection pipe 20 in the normal pressure state as shown in FIG. By opening the blocking film 22 as shown in FIG. 6, the discharge gas 23 is injected into the panel.

The metal material 24 inserted into the center portion of the blocking film 22 has a melting point higher than that of the blocking film 22. The blocking film 22 is formed of a thin glass film, and the metal material 24 is formed of steel. The same can be used.

Therefore, when the heating device 25 attached to the outer circumference of the discharge gas injection pipe 20, that is, the heating device 25 as a specific example is a high frequency heating source, a high frequency current flows through the coil of the high frequency heating source. The energy is concentrated on the surface layer of the metal material 24 located inside the coil, and is rapidly heated. Accordingly, the surface layer of the heated metal material 24 rapidly melts the thin glass film around it for a certain time. After this, the glass film no longer supports the metal 24, and thus the metal 24 falls downward due to its own weight, thereby forming a passage for injecting the discharge gas located below. 23) is injected into the panel.

Finally, in the secondary tip-off process (S8), after the discharge gas is injected into the inside of the panel, the tip portion of the discharge gas injection pipe 20 by using a heating device such as a torch or a folding heater 27. Melt and cut to seal the panel as shown in FIG.

Plasma display panel manufacturing method according to the present invention through the above process is discharge gas injection tube 20 is sealed near the lower end of the lower plate 12 inside the panel by the discharge gas injection tube 20 By simply injecting the discharge gas into the air, it is not necessary to connect a separate gas injection device to inject the discharge gas into the panel as in the conventional method of manufacturing a plasma display panel. The productivity is significantly improved since it is much shorter.

In addition, FIG. 8 illustrates a state in which only the second through hole 12b is simply formed without attaching the exhaust pipe 30 as shown in FIG. 4 in order to discharge a small amount of impurity gas remaining inside the panel. As the drawing, the above method does not attach the exhaust pipe 30 to the second through hole 12b as compared with the above-described method, so that the exhaust pipe (S2), (S3), (S4), and (S5) described above are not provided. 30 is not required, and only the method according to the sealing of the second through hole 12b in step S5 is different, and only the differences in step S5 will be described below.

After the impurity gas remaining inside the panel is discharged from the inside of the panel to the outside in the preceding exhaust and sealing process S4, the second through hole 12b of the lower plate 12 is sealed as shown in FIG. 9. Process S5 is performed.

The sealing process (S5) for sealing the second through hole 12b as described above may be used in various ways, as a specific example of the metal 43 is coated frit glass 42 on the upper side as shown in FIG. Is attached to the second through hole 12b, and the frit glass 42 located between the second through hole 12b and the metal 43 is melted by the encapsulation heater 44 so that the metal 43 The second through hole 12b may be sealed, and the metal 43 may be lifted and lifted by a piston 45 located below the heater 44 between the piston 45 and the metal 43. Can be achieved by positioning a, and for the other processes the same as those described above are used.

According to the method of manufacturing a plasma display panel according to the present invention, a discharge gas injection tube into which discharge gas is injected is sealed in a lower part of the panel, and the discharge gas is injected simply into the inside of the panel by the discharge gas injection tube to discharge the discharge. By eliminating the need for a separate gas injection device for injecting the gas, it is possible to improve productivity by greatly reducing the time required for the entire process while simplifying the process.

In addition, according to the method of manufacturing a plasma display panel according to the present invention, a small amount of impurity gas remaining inside the panel is finally discharged to the outside of the panel to improve the degree of vacuum inside the panel to improve the quality of the final product. Can be.

Although the present invention has been described with reference to the embodiments described above, it can be said that it is exemplary, and those skilled in the art can come up with various modifications and equivalent embodiments therefrom, such an equivalent implementation It is only natural that examples should also be regarded as included within the claims of the present invention.

Claims (4)

The upper plate 11 and the lower plate 12 to be used in the plasma display panel are respectively formed, and the lower plate 12 discharges the first through hole 12a for injecting the discharge gas and a small amount of impurity gas generated inside the panel. An upper plate and a lower plate forming process (S1) for forming a second through hole 12b separately for each; A tube body 21 having an outer wall of which an upper part is opened and a lower part thereof is closed, a blocking film 22 formed to block flow of a fluid at a point inside the tube body 21, and the blocking film 22. A discharge gas injection tube 20 formed of a discharge gas 23 filled in a lower portion of the lower portion and a metal material 24 inserted into a central portion of the blocking film 22, and formed of a tube body having an upper portion and an lower portion opened. Forming an exhaust pipe (30) (S2); The upper plate 11 and the lower plate 12 formed in the step (S1) are superimposed and aligned under normal pressure, and the edges are pressed and fixed by the clip 13 to be bonded to one panel, and at the step (S2). An alignment and clipping process (S3) of fixing the formed discharge gas injection pipe (20) to the first through hole (12a) and fixing the exhaust pipe (30) to the second through hole (12b); The panel clipped in the step S3 is introduced into the vacuum chamber 10, and then the frit glass for sealing the upper plate 11 and the lower plate 12 with the gas inside the panel while heating the panel under vacuum. The first through-hole 12a having a vacuum exhaust through the gap of 14) and then pressure-sealed, and the discharge gas injection pipe 20 and the exhaust pipe 30 formed near the lower end of the lower plate 12; Exhaust and sealing processes (S4) for heating and sealing each of the second through holes 12b using frit glass; A first tip off step (S5) of sealing the tip portion of the exhaust pipe (30) after the impurity gas remaining inside the panel is discharged from the inside of the panel to the outside in the step (S4); A transfer step (S6) of taking out the sealed panel of the tip portion of the exhaust pipe (30) in the step (S5) from the vacuum chamber (10) and transferring it to an atmospheric pressure furnace; In the atmospheric pressure state, the metal material 24 is heated using the heating device 25 attached to the outer circumference of the discharge gas injection tube 20 to open the blocking film 22, so that the discharge gas 23 is formed in the panel. A discharge gas injection process (S7) to be injected into the interior; And And a secondary tip off step (S8) of sealing the tip of the discharge gas inlet tube (20). The method of claim 1, A method of manufacturing a plasma display panel further comprising an atmospheric pressure heating step of further heating the panel to 300 to 350 ° C. under normal pressure between the step (S3) and the step (S4). The upper plate 11 and the lower plate 12 to be used in the plasma display panel are respectively formed, and the lower plate 12 discharges the first through hole 12a for injecting the discharge gas and a small amount of impurity gas generated inside the panel. An upper plate and a lower plate forming process (S1) for forming a second through hole 12b separately for each; A tube body 21 having an outer wall of which an upper part is opened and a lower part thereof is closed, a blocking film 22 formed to block flow of a fluid at a point inside the tube body 21, and the blocking film 22. Forming a discharge gas injection tube (20) consisting of a discharge gas (23) filled in a lower portion of the lower portion and a metal material (24) inserted into a central portion of the blocking film (22); The upper plate 11 and the lower plate 12 formed in the step (S1) are superimposed and aligned under normal pressure, and the edges are pressed and fixed by the clip 13 to be bonded to one panel, and at the step (S2). An alignment and clipping process of fixing the formed discharge gas injection tube 20 to the first through hole 12a (S3); The panel clipped in the step S3 is introduced into the vacuum chamber 10, and then the frit glass for sealing the upper plate 11 and the lower plate 12 with the gas inside the panel while heating the panel under vacuum. 14 through the gap of 14) to be evacuated and pressurized, and using frit glass in the first through hole 12a formed near the lower end of the lower plate 12. Heat sealing and sealing process (S4); A sealing step (S5) of sealing the second through hole (12b) of the lower plate (12) after the impurity gas remaining in the panel is discharged from the inside of the panel to the outside in the step (S4); A transfer step (S6) of taking out the panel in which the second through hole (12b) is sealed in the step (S5) from the vacuum chamber (10) and transferring it to an atmospheric pressure furnace; By discharging the metal material 24 to open the blocking film 22 by using the heating device 25 attached to the outer circumference of the discharge gas inlet tube 20 in the normal pressure state, the discharge gas 23 of the panel A discharge gas injection process (S7) to be injected into the interior; And And a tip off step (S8) of sealing the tip portion of the discharge gas inlet tube (20). The process of claim 3, wherein the sealing of the second through hole 12b comprises attaching the metal 43 having the frit glass 42 coated thereon to the second through hole 12b. The frit glass 42 located between 12b and the metal 43 is melted by the encapsulation heater 44 so that the metal 43 seals the second through hole 12b, but the heater 44 A method of manufacturing a plasma display panel, which is lifted by a piston (45).

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