JP4114381B2 - Method for manufacturing plasma display panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing a plasma display panel , which is known as a large-screen, thin and lightweight display device.
[0002]
[Prior art]
In a plasma display panel (hereinafter referred to as PDP), an ultraviolet ray is generated by gas discharge, and a phosphor is excited by the ultraviolet ray to emit light, thereby performing color display.
[0003]
PDPs are broadly classified into AC types and DC types in terms of drive. There are surface discharge types and counter discharge types in terms of discharge types, but they are manufactured with higher definition, larger screens, and structural simplicity. Therefore, at present, the surface discharge type PDP having a three-electrode structure is mainly used.
[0004]
The general structure of this PDP is shown in FIGS. FIG. 1 is a cross-sectional perspective view showing a schematic configuration of a PDP. 2 is a cross-sectional view taken along the line XX in FIG. 1 and shows a schematic configuration of the entire PDP region including exhaust holes and exhaust pipes not shown in FIG. The front plate 1 has a structure in which a plurality of display electrodes 5 covered with a dielectric layer 3 and a protective film 4 made of an MgO deposited film are attached on a transparent and insulating substrate 2 such as glass. The display electrode 5 is a pair of a scan electrode 6a and a sustain electrode 6b. In addition, the back plate 7 is provided with a plurality of data electrodes 10 covered with an insulating layer 9 on an insulating substrate 8 such as glass, and the data electrodes 10 on the insulating layer 9 are interposed between the data electrodes 10. 10, a stripe-shaped partition wall 11 is provided in parallel with the structure 10, and a phosphor layer 12 is provided over the surface of the insulator layer 9 and the side surface of the partition wall 11. The front plate 1 and the back plate 7 are arranged to face each other with the discharge space 13 therebetween so that the scan electrodes 6a and the sustain electrodes 6b and the data electrodes 10 are orthogonal to each other, and the first seal member 14 in the peripheral portion. It is stuck in an airtight state. The substrate 8 has an exhaust hole 15, and an exhaust pipe 16 made of, for example, a glass material is connected to the exhaust hole 15 in an airtight state by a second seal member 17. The exhaust hole 15 and the exhaust pipe 16 are for exhausting the inside of the PDP and thereafter enclosing the discharge gas. After the discharge gas is encapsulated, the tip of the exhaust pipe 16 is sealed. The discharge gas sealed inside the PDP is made of at least one kind of rare gas among neon, argon, and xenon. The discharge space 13 at the intersection of the data electrode 10, the scan electrode 6a, and the sustain electrode 6b is operated as a discharge cell 18 between two adjacent barrier ribs 11.
[0005]
Here, in the PDP having the above structure, the front plate 1 and the back plate 7 are bonded together in an airtight state, and the exhaust pipe 16 is connected to the exhaust hole 15 in an airtight state. 2 and the substrate 8 of the back plate 7 are formed, and then overlapped, and an exhaust pipe 16 is disposed in the exhaust hole 15 to cover the contact portion. The member 17 is formed, and in this state, the first sealing member 14 and the second sealing member 17 are heated to the softening point temperature, melted, and then cooled and solidified. The
[0006]
In addition, the discharge gas is sealed inside the PDP, so that the discharge gas is sealed after the impurities existing inside the PDP having an adverse effect on the discharge characteristics are discharged. An exhaust baking process is performed, and then a discharge gas is sealed.
[0007]
Therefore, it is effective to increase the baking temperature during exhaust baking in order to enhance the effect of discharging impurities present in the PDP and to improve the discharge characteristics.
[0008]
[Problems to be solved by the invention]
However, in the structure of the PDP described above, the upper limit of the baking temperature is limited to a temperature at which the first seal member 14 and the second seal member 17 are not re-softened, that is, below the softening point temperature. There may be a problem that the impurity discharge effect cannot be obtained. This is because if the baking temperature is made higher than the softening point temperature of the first seal member 14 or the second seal member 17, the first seal member 14 or the second seal member 17 is re-softened. This is because if the inside of the PDP is evacuated in this state, a negative pressure acts on the seal member, so that the seal member is drawn into the PDP, and as a result, leakage occurs.
[0009]
Here, as a result of examining a leak that occurs when we set the baking temperature to be equal to or higher than the softening point temperature of the seal member, it was confirmed that this leak mainly occurs in the portion of the second seal member 17. This is because the negative pressure acting on the second seal member 17 at the joint between the exhaust hole 15 and the exhaust pipe 16 is applied to the first seal member 14 around the substrate because of the exhaust resistance relationship during exhaust. This is presumably because the second seal member 17 is more easily drawn into the PDP even in the same softened state at the same heating temperature.
[0010]
The present invention has been made in view of such a situation, and realizes a method of manufacturing a PDP that can increase the baking temperature during exhaust baking without causing leakage at the seal portion with a simple configuration. With the goal.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the method of manufacturing a PDP according to the present invention includes a front plate and a back plate that are arranged to face each other so that a discharge space is formed between them, and a peripheral portion is airtight by a first seal member. A sealing step in which at least one of the front plate and the rear plate has an exhaust hole for exhausting the inside of the discharge space, and the exhaust pipe is connected to the exhaust hole in an airtight state by the second seal member. And after the sealing step, a method of manufacturing a plasma display panel comprising: an exhaust baking step of heating to an exhaust baking temperature and exhausting the interior; and a step of enclosing a discharge gas after the exhaust baking step. The second seal member is made of a material whose softening point temperature is higher than the softening point temperature of the first seal member, and the exhaust baking temperature is equal to or higher than the softening point temperature of the first seal member. Is obtained is characterized in that not more than the softening point temperature of the seal member.
[0012]
In order to achieve the above object, the method for manufacturing a PDP according to the present invention includes a front plate and a back plate that are opposed to each other so that a discharge space is formed therebetween, and a peripheral portion is airtight by a first seal member. And at least one of the front plate and the rear plate has an exhaust hole for exhausting the inside of the discharge space, and the exhaust pipe is connected to the exhaust hole in an airtight state by the second seal member. A method of manufacturing a plasma display panel, comprising: an attaching step; an exhaust baking step for heating the exhaust gas to an exhaust baking temperature after the sealing step and exhausting the interior; and a step of enclosing a discharge gas after the exhaust baking step The first seal member and the second seal member are low melting point glass materials having the same softening point temperature, and the average particle diameter of the low melting point glass material constituting the second seal member is set to the first seal member. Mean largely composed of the particle diameter of the low melting point glass material constituting the member, the exhaust baking temperature, in which is characterized in that the softening point temperature or more first sealing member and second sealing member.
[0013]
In order to achieve the above object, the method for manufacturing a PDP according to the present invention includes a front plate and a back plate that are opposed to each other so that a discharge space is formed therebetween, and a peripheral portion is airtight by a first seal member. And at least one of the front plate and the rear plate has an exhaust hole for exhausting the inside of the discharge space, and the exhaust pipe is connected to the exhaust hole in an airtight state by the second seal member. A method of manufacturing a plasma display panel, comprising: an attaching step; an exhaust baking step for heating the exhaust gas to an exhaust baking temperature after the sealing step and exhausting the interior; and a step of enclosing a discharge gas after the exhaust baking step The first sealing member and the second sealing member are made of a low-melting glass material having the same softening point temperature, and only the second sealing member is formed by pressing and hardening the low-melting glass material. The grayed temperature, in which is characterized in that the softening point temperature or more first sealing member and second sealing member.
[0014]
As described above, it is possible to realize a method for manufacturing a PDP capable of increasing the baking temperature during exhaust baking without causing leakage at the seal portion.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
Hereinafter, although the manufacturing method of PDP by one Embodiment of this invention is demonstrated, the aspect of this invention is not restrict | limited to this. Further, the structure of the PDP according to the present embodiment is the same as that shown in FIGS. 1 and 2, and therefore, detailed description thereof will be omitted. In the following description, characteristic portions of the present embodiment will be described. Is described. In addition, the same number is attached | subjected to the same component as FIG. 1 and FIG.
[0016]
A characteristic feature of the manufacturing method of the PDP according to the present embodiment is that the softening point temperature of the material constituting the second seal member 17 is the softening point of the material constituting the first seal member 14 in the peripheral portion of the PDP. It is configured to be higher than the temperature.
[0017]
According to this , even if the baking temperature is higher than the softening point temperature of the first seal member 14 and lower than the softening point temperature of the second seal member 17 as compared with the conventional case, the first seal member 14 is exhausted. Since the negative pressure acting on the PDP is very small, it is difficult to be pulled into the PDP even if the first seal member 14 is remelted, and the second seal member 17 on which the negative pressure acts is not remelted. Therefore, it is also difficult to be pulled into the PDP, and as a result, no leak occurs in the seal portion.
[0018]
Therefore, according to the PDP manufacturing method of the present embodiment, it is possible to increase the baking temperature during exhaust baking without causing leakage at the seal portion.
[0019]
Note that specific materials for the first seal member 14 and the second seal member 17 are low when glass materials are used for the substrate 2 of the front plate 1, the substrate 8 of the back plate 7, and the exhaust pipe 16. It is suitable to use a melting point glass material, so-called frit glass. Here, the frit glass includes, for example, a predetermined weight% of SiO2, B2O3, Al2O3, PbO, etc. as a composition. As an example, there is a composition in which SiO2 is 1% by weight, B2O3 is 12.5% by weight, Al2O3 is 1.07% by weight, and PbO is 84.1% by weight. The softening point temperature is adjusted by the weight percentage of PbO, and the softening point temperature can be increased by decreasing the softening point temperature.
[0020]
Here, if the softening point temperature of the second seal member 17 is configured to be 15 ° C. or more higher than the softening point temperature of the first seal member 14 and the baking temperature is increased accordingly, It has been confirmed that the impurity discharge effect can be further enhanced, which is preferable.
[0021]
(Second Embodiment)
Hereinafter, a method for manufacturing a PDP according to another embodiment of the present invention will be described. The structure of the PDP according to the present embodiment is the same as that shown in FIGS. 1 and 2, and therefore, detailed description thereof will be omitted, and the characteristic portions of the present embodiment will be described in the following description. . In addition, the same number is attached | subjected to the same component as FIG. 1 and FIG.
[0022]
A characteristic feature of the PDP manufacturing method according to the present embodiment is that a low-melting glass material is used as the material of the first seal member 14 and the second seal member 17 and the low-melting point constituting the second seal member 17. That is, the average particle diameter of the glass material is configured to be larger than the average particle diameter of the low-melting glass material constituting the first seal member 14 in the peripheral portion of the PDP. Even if the low melting point glass material has the same softening point in terms of physical properties, the melting state is different if the average particle size is different, and generally the fluidity at the time of melting becomes worse if the particle size is large. This is because, when compared with low melting point glass materials of the same volume, when the particle size of the low melting point glass material is large, the surface area is small compared to when the particle size is small, so how to receive heat energy during heating, and thereby the melting of the particles This is thought to be due to a difference in state. We have confirmed that this is also a phenomenon that occurs during remelting.
[0023]
Therefore, as described above, when a low melting point material having a larger average particle diameter than that of the first seal member 14 is used as the second seal member 17, the baking temperature is set to the first seal member 14 and the second seal member. Even if the temperature is higher than the softening point temperature of the member 17 and higher than before, the negative pressure acting on the first seal member 14 during exhaust is very small, so even if the first seal member 14 is remelted, the PDP The second seal member 17 that is difficult to be drawn into the interior and has a large negative pressure exerts poor fluidity even when remelted, and therefore is not easily drawn into the PDP. As a result, leakage occurs at the seal portion. There is nothing.
[0024]
Therefore, according to the PDP manufacturing method of the present embodiment, it is possible to increase the baking temperature during exhaust baking without causing leakage at the seal portion.
[0025]
(Third embodiment)
Hereinafter, a method for manufacturing a PDP according to another embodiment of the present invention will be described. The structure of the PDP according to the present embodiment is the same as that shown in FIGS. 1 and 2, and therefore, detailed description thereof will be omitted, and the characteristic portions of the present embodiment will be described in the following description. . In addition, the same number is attached | subjected and demonstrated to the same component as FIG. 1 and FIG.
[0026]
A characteristic feature of the manufacturing method of the PDP according to the present embodiment is that a low-melting glass material is used as the material of the first seal member 14 and the second seal member 17, and the second seal member 17 is low. That is, a melting point glass material is used. Compared to the case where the particles of the low melting glass material are simply agglomerated, the molten state is different even if the softening point is the same in terms of physical properties, and generally the fluidity is poor due to the consolidation. Become. This is because, when compared with the same volume of low melting glass material, the compacted particles have a smaller surface area than just the aggregated particles, and therefore how heat energy is received during heating and the resulting melting This is thought to be due to a difference in state. We have confirmed that this is also a phenomenon that occurs during remelting.
[0027]
Therefore, as described above, by using a material obtained by pressing a low melting glass material as the second seal member 17, the baking temperature is set to be equal to or higher than the softening point temperature of the first seal member 14 and the second seal member 17. Even if it is higher than before, the negative pressure acting on the first seal member 14 during exhaust is very small, so even if the first seal member 14 is remelted, it is difficult to be drawn into the PDP. Since the second seal member 17 on which the negative pressure acts greatly has poor fluidity even when remelted, it is also difficult to be pulled into the PDP, and as a result, no leak occurs in the seal portion.
[0028]
Therefore, according to the PDP manufacturing method of the present embodiment, it is possible to increase the baking temperature during exhaust baking without causing leakage at the seal portion.
[0029]
【The invention's effect】
As described above, according to the present invention, since it is possible to increase the baking temperature during exhaust baking without causing leakage at the seal portion, the effect of discharging impurities present inside the PDP is increased. It is possible to realize a method for manufacturing a PDP with good discharge characteristics .
[Brief description of the drawings]
FIG. 1 is a cross-sectional perspective view showing a schematic configuration of a general plasma display panel. FIG. 2 is a cross-sectional view taken along the line XX in FIG.
DESCRIPTION OF SYMBOLS 1 Front plate 7 Back plate 13 Discharge space 14 First seal member 15 Exhaust hole 16 Exhaust pipe 17 Second seal member

Claims (4)

The front plate and the back plate are placed facing each other so that a discharge space is formed between them, and the peripheral part is adhered in a gastight state by the first seal member, and at least one of the front plate and the back plate is in the discharge space. A sealing step of connecting the exhaust pipe to the exhaust hole in an airtight state by a second seal member;
After this sealing step, an exhaust baking step of heating to the exhaust baking temperature and exhausting the inside,
After this exhaust baking process, a process of enclosing discharge gas,
A method of manufacturing a plasma display panel comprising:
The second seal member is made of a material whose softening point temperature is higher than the softening point temperature of the first seal member,
A method of manufacturing a plasma display panel, wherein the exhaust baking temperature is set to be not lower than a softening point temperature of the first seal member and not higher than a softening point temperature of the second seal member. The front plate and the back plate are placed facing each other so that a discharge space is formed between them, and the peripheral part is adhered in a gastight state by the first seal member, and at least one of the front plate and the back plate is in the discharge space. A sealing step of connecting the exhaust pipe to the exhaust hole in an airtight state by a second seal member;
After this sealing step, an exhaust baking step of heating to the exhaust baking temperature and exhausting the inside,
After this exhaust baking process, a process of enclosing discharge gas,
A method of manufacturing a plasma display panel comprising:
The first seal member and the second seal member are low melting point glass materials having the same softening point temperature, and the average particle diameter of the low melting point glass material constituting the second seal member is the first seal member. Configured to be larger than the average particle size of the low melting point glass material
A method for manufacturing a plasma display panel, wherein the exhaust baking temperature is set to be equal to or higher than a softening point temperature of the first seal member and the second seal member. The front plate and the back plate are placed facing each other so that a discharge space is formed between them, and the peripheral part is adhered in a gastight state by the first seal member, and at least one of the front plate and the back plate is in the discharge space. A sealing step of connecting the exhaust pipe to the exhaust hole in an airtight state by a second seal member;
After this sealing step, an exhaust baking step of heating to the exhaust baking temperature and exhausting the inside,
After this exhaust baking process, a process of enclosing discharge gas,
A method of manufacturing a plasma display panel comprising:
The first sealing member and the second sealing member are low melting point glass materials having the same softening point temperature, and only the second sealing member is configured by pressing and fixing the low melting point glass material,
A method for manufacturing a plasma display panel, wherein the exhaust baking temperature is set to be equal to or higher than a softening point temperature of the first seal member and the second seal member. The method of manufacturing a plasma display panel according to claim 1, wherein the softening point temperature of the second seal member is configured to be 15 ° C or higher than the softening point temperature of the first seal member.

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