JP4905364B2 - Plasma display panel - Google Patents

Description

  The present invention relates to a plasma display panel (hereinafter referred to as a PDP) which is a flat display device used for large televisions, public displays, and the like, and more specifically, discharges a formed discharge space and encloses a discharge gas. It is related with PDP provided with the exhaust pipe for this.

  A plasma display panel (hereinafter referred to as PDP) has a structure in which peripheral portions of a front panel and a back panel arranged opposite to each other are sealed by a sealing member, and a discharge space formed between the front panel and the back panel. Is filled with a discharge gas such as neon and xenon.

  The front panel includes a plurality of display electrode pairs formed of scan electrodes and sustain electrodes formed in a stripe shape on one side of a glass substrate, a dielectric layer that covers these display electrode pairs and functions as a capacitor, and a dielectric layer. And a protective layer made of magnesium oxide (MgO) formed on the body layer. Each of the display electrode pairs includes a transparent electrode and a bus electrode made of a metal material formed on the transparent electrode.

  The back panel has a plurality of address electrodes formed in a stripe shape in a direction perpendicular to the display electrode pair on one side of the other glass substrate, a base dielectric layer covering these address electrodes, and an address electrode for discharging space. Stripe-shaped partition walls that are partitioned every time, and red, green, and blue phosphor layers that are sequentially applied to the grooves between the partition walls.

  The front panel and the back panel having the above structure are opposed to each other on the electrode forming surface side, and the peripheral edge thereof is hermetically sealed with a sealing member, and the discharge space is exhausted to one corner of the back panel, and then the discharge is performed. An exhaust pipe for introducing gas is attached. After introducing a discharge gas composed of neon and xenon into the discharge space at a pressure of 50 KPa to 80 KPa, a predetermined part of the exhaust pipe is locally heated and melted and hermetically sealed to complete the PDP. The display electrode pair and the address electrode are orthogonal to each other, and the intersection is a discharge cell. These discharge cells are arranged in a matrix, and three discharge cells having red, green, and blue phosphor layers arranged in the direction of the display electrode pair become pixels for color display. The completed PDP is discharged by sequentially applying a video signal voltage to the address electrode, the scan electrode, and the display electrode pair, and the ultraviolet rays generated by the discharge excite the phosphor layers of each color to produce red, green, and colored Display a color image by emitting light.

  For the sealing of the front panel and the rear panel described above, a paste-like sealing member in which a filler is mixed with a low melting point glass frit mainly composed of lead oxide and kneaded with an organic solvent is used for printing, inkjet, dispenser, etc. After applying the sealing member to the peripheral portion of the glass substrate of at least one of the front panel and the rear panel using any one of the coating apparatuses, the glass frit is not completely melted in advance. Temporary baking is performed at a temperature of about. Thereafter, the front panel and the rear panel are arranged to face each other and sealed at a sealing temperature higher than the temperature of assembly and pre-baking.

  In consideration of recent environmental problems, PDPs are also required to use lead-free materials called “lead-free” and “lead-free” that do not contain lead components. As the sealing member, a phosphoric acid-based (phosphoric acid-tin oxide-based) sealing member that does not contain a lead component, or a bismuth oxide-based sealing member is disclosed (for example, Patent Document 1, Patent Document 2, etc.) reference). However, the sealing member mainly composed of phosphoric acid-tin oxide-based low-melting glass proposed as a lead-free sealing member is inferior in water resistance as compared with a lead oxide-based sealing member that has been conventionally used. Therefore, there remains a problem that it is difficult to sufficiently maintain the airtightness of the PDP.

On the other hand, for sealing the exhaust pipe to the back panel, as in the case of sealing the front panel and back panel, a paste material mixed with a low melting point glass frit and a filler and kneaded with a solvent is centered in the mold. A sealing member called a tablet which is molded into a shape having an opening in the part and heated and fired in order to evaporate the solvent and at the same time be strong enough not to be destroyed by the assembly process is used. Conventionally, as a sealing member for this tablet, a material formed of borosilicate glass containing lead having a relatively low softening point and excellent workability in a sealing process has been used. Therefore, it is required to use a lead-free material.
JP 2004-182584 A JP 2003-095597 A

  FIG. 6 is a cross-sectional view showing the positional relationship between the rear panel and the exhaust pipe when the exhaust pipe is sealed and joined in the PDP. When sealing the exhaust pipe to the rear panel with respect to the rear panel, the end of the exhaust pipe that is sealed to the rear panel is at the bottom, and the end of the exhaust pipe that is connected to the exhaust device is at the top In the case of performing the sealing process with the arrangement facing the direction, as shown in the cross-sectional view of FIG. 6A, the sealing joint 25 is not drooped by the heating process at the time of sealing and spreads over the surface of the back panel 10. . As a result, a softening point can be selected in a wide range as the glass frit constituting the sealing joint portion 25. At this time, the angle θ between the outermost tangent line of the sealing joint 25 passing through the intersection with the sealing surface of the back panel 10 and the back panel 10 surface is 90 as the cross-sectional shape of the sealing joint 25 after sealing. More than °. In the case of such a shape, the adhesion area of the sealing joint portion 25 to the back panel 10 is large, and stress concentration does not occur with respect to the external force and thermal strain applied to the exhaust pipe 22, and the reliability of the sealing portion is ensured. Is done.

  However, as shown in FIG. 6 (a), in the case of the configuration in which the end of the exhaust pipe 22 to be sealed is on the bottom and the end on the side connected to the exhaust device is on the top, the exhaust device ( It is necessary to bend the pipe connecting the exhaust pipe 22 (not shown) to the exhaust pipe 22, resulting in disadvantages that the pipe becomes long and that introduction of exhaust gas and discharge gas is difficult to automate.

  On the other hand, as shown in FIG. 6B, the end of the exhaust pipe 22 that is sealed to the back panel 10 is on the upper side, and the end of the exhaust pipe 22 that is connected to an exhaust device (not shown). When the sealing process is performed with the structure facing downward, the sealing joint 25 at the time of sealing hangs down and the angle θ shown in FIG. 6B tends to be 90 ° or less. In particular, in the sealing joint portion 25 made of bismuth oxide-based glass frit, the intersection angle tends to be 90 ° or less. When the cross section of the sealed portion after sealing has such a shape, tensile stress concentrates on the sealed portion due to the difference in expansion coefficient between the glass frit and the back glass substrate. As a result, the sealing portion is destroyed by rapid heating when the exhaust pipe 22 is locally heated and melted and hermetically sealed, or the sealing portion is destroyed in a thermal shock test or a thermal cycle test. For this reason, the reliability such as the confidentiality is broken and the operation failure of the PDP is significantly reduced.

  The present invention has been made in order to solve the above-described problems, and an end portion of an exhaust pipe connected to an exhaust device is used by using a sealing member mainly composed of non-leaded frit glass. An object of the present invention is to realize a PDP with a low environmental load that ensures the reliability of hermeticity of the sealing portion even when sealing is performed with the arrangement facing downward.

  In order to achieve the above object, the PDP of the present invention has a front panel and a back panel arranged opposite to each other, and a discharge space is formed by sealing the periphery of the front panel and the back panel with a first sealing member. And a plasma display panel in which an exhaust pipe for exhausting a discharge space and enclosing a discharge gas is sealed and joined to at least one of a front panel and a rear panel by a second sealing member, The composition is a frit glass containing 67% to 73% by weight of bismuth oxide, 8% to 11% by weight of zinc oxide, 4% to 6% by weight of boron oxide, and the remaining components being cordierite.

  With such a configuration, since the shape of the sealing joint portion of the exhaust pipe can be made into a shape without drooping, the stress concentration on the sealing joint portion is suppressed, the manufacturing yield is high, and the reliability is high. PDP can be realized.

  Further, the composition of the first sealing member is 70% to 75% by weight of bismuth oxide, 8% to 10% by weight of zinc oxide, 4% to 6% by weight of boron oxide, and 6% of aluminum oxide. It is desirable to make a frit glass containing 1% to 3% by weight of silicon oxide or magnesium oxide by 1% to 8% by weight.

  According to such a configuration, it is possible to realize a PDP that realizes lead-free as a sealing member and has a high manufacturing yield and high reliability.

  According to the method for manufacturing a PDP of the present invention, it is possible to realize a PDP having high manufacturing yield and high reliability in consideration of environmental problems by using a sealing member made of a lead-free glass frit.

  Hereinafter, a PDP according to an embodiment of the present invention will be described in detail with reference to the drawings.

(Embodiment)
FIG. 1 is a perspective view of a main part showing the structure of a PDP in an embodiment of the present invention. The PDP 1 has a front panel 2 in which various display members are provided on one surface of a transparent substrate such as glass, and a back panel 10 in which various display members are provided on the other surface of the other transparent substrate, with the display member side facing each other. The peripheral portion is hermetically sealed by a sealing member made of glass frit or the like. A discharge gas such as neon (Ne) and xenon (Xe) is sealed at a pressure of 50 KPa to 80 KPa in the discharge space 16 inside the sealed PDP 1.

  In view of this, the front panel 2 is formed with a plurality of display electrode pairs 6 each consisting of scan electrodes 4 and sustain electrodes 5 arranged in parallel on the front glass substrate 3. Scan electrode 4 and sustain electrode 5 are each composed of a transparent electrode made of indium oxide, tin oxide or the like, and a metal bus electrode mainly composed of silver formed on the transparent electrode. A light shielding layer 7 is formed between the display electrode pairs 6 by screen printing a paste containing a black pigment. Then, after applying a dielectric paste by a die coating method or the like so as to cover the display electrode pair 6 and the light shielding layer 7 formed on the front glass substrate 3, the dielectric layer 8 is formed by baking and solidifying. . The dielectric paste is a paint containing a dielectric material such as glass powder, a binder and a solvent. Further, a protective layer 9 made of magnesium oxide (MgO) or the like is formed on the surface by vacuum deposition, and the front panel 2 is completed.

  The back panel 10 is formed by screen-printing a paste containing silver material on the other back glass substrate 11 with a plurality of stripe-shaped address electrodes 12 and baking it at a desired temperature. On the back glass substrate 11 on which the address electrodes 12 are formed, a dielectric paste is applied so as to cover the address electrodes 12 by a die coating method or the like, and then baked to form the base dielectric layer 13.

  Further, a barrier rib forming paste containing barrier rib material is applied on the underlying dielectric layer 13, patterned into stripes sandwiching the address electrodes 12, and then baked to form barrier ribs 14 for dividing the discharge space. Is done. A phosphor layer 15 that emits red, green, and blue light by ultraviolet rays is sequentially applied to the grooves between the barrier ribs 14 for each address electrode 12 to complete the back panel 10.

  Discharge space 16 is formed at a position where scan electrode 4 and sustain electrode 5 and address electrode 12 intersect, and discharge space 16 having red, green, and blue phosphor layers 15 arranged in the direction of display electrode pair 6 is displayed in color. Become a pixel for.

  FIG. 2 is a diagram showing a state in which the front panel 2 and the rear panel 10 of the PDP in the embodiment of the present invention are sealed and joined, and FIG. In the top view of PDP which sealed the peripheral part with the sealing member 21, and also sealed with the tablet 33 which shape | molded the sealing member by shape | molding the exhaust pipe 22 in the back panel 10 in the narrow port part 24 for exhaust. is there. FIG. 2B is a cross-sectional view of the PDP shown in FIG.

  FIG. 3 is a cross-sectional view showing the PDP sealing procedure in the embodiment of the present invention. The sealing process of the front panel 2 and the back panel 10, and the back panel 10 and the exhaust pipe 22 will be described with reference to FIGS.

  In the embodiment of the present invention, a paste-like sealing member in which glass frit containing no low melting point lead component and a predetermined filler are mixed and kneaded with an organic solvent is used as the first sealing member. The sealing member 21 is disposed and formed on the peripheral edge of at least one of the front panel 2 and the rear panel 10 by any type of coating apparatus such as printing, inkjet, or dispenser, and the glass frit is not melted. Temporary firing at temperature.

  The filler has heat resistance and is used to adjust the thermal expansion coefficient of the sealing member 21 and to control the flow state of the glass. Cordierite, forsterite, β-eucryptite, zircon Mullite, barium titanate, aluminum titanate, titanium oxide, molybdenum oxide, tin oxide, aluminum oxide, quartz glass and the like are used as single or mixed materials as particularly preferable materials.

  Further, the sealing member 21 is prepared in advance by using a sheet-like base material having a predetermined thickness and shape, without using an applicator to form the sealing member 21, and this is used as the front panel 2 and the rear surface. You may seal both panels by making it adhere to the peripheral part of the panel 10 and heating.

  On the other hand, in the embodiment of the present invention, the shape shown in FIG. 4 is shown as the sealing member 23 which is the second sealing member for sealing the exhaust pipe 22 to the exhaust outlet 24 formed at one corner of the back panel 10. The tablet 31 is used. FIG. 4 is a perspective view showing a tablet 33 used for sealing the back panel 10 of the PDP and the exhaust pipe 22 in the embodiment of the present invention. That is, a material obtained by mixing lead-free glass frit and filler and kneading with a solvent is formed into a tablet 33 having a shape having an opening 32 at the center as shown in FIG. 4, and the solvent is evaporated. In order to achieve this, it is sintered by heating and firing at a predetermined temperature.

  The material composition of the sealing member 21 as the first sealing member and the sealing member 31 as the second sealing member will be described in detail later.

  In the embodiment of the present invention, as shown in FIG. 3A, the connection between the exhaust pipe head 41 and the exhaust pipe 22 is easy and can be directly connected to shorten the pipe, so that reduction of the processing man-hours can be expected. The arrangement is such that the end of the exhaust pipe 22 to be sealed is directed upward and the end connected to the exhaust pipe head 41 is directed downward. FIG. 3B shows a state after the exhaust pipe 22 is sealed and joined to the back panel 10.

  The front panel 2 and the rear panel 10 having the sealing member 21 disposed on the peripheral edge thereof are arranged to face each other so that the display electrode pair 6 and the data electrode of the rear panel 10 are orthogonal to each other, aligned at a predetermined position, and fixed jig ( Press and hold temporarily (not shown). Furthermore, the center of the opening 32 of the tablet 33 and the center axis of the opening of the exhaust pipe 22 are placed in alignment with the center of the exhaust outlet 24 provided on the back panel 10 so that the centers of the openings are not displaced. Temporarily fix by pressing with another fixing jig (not shown).

  Then, the lower end of the exhaust pipe 22 is connected to the exhaust pipe head 41. The exhaust pipe head 41 includes elastic means 42 such as a spring and presses the exhaust pipe 22 in the direction indicated by the arrow C in FIG. As described above, the front panel 2, the rear panel 10, the exhaust pipe 22, and the exhaust head 41 that are assembled and fixed with the jig are introduced into the firing furnace, and the peripheral portions of the front panel 2 and the rear panel 10 and the rear surface of the exhaust pipe 22 are introduced. Each sealing member 21 and the tablet 33 arranged on the panel 10 side are melted at a temperature of 480 ° C. to 500 ° C., cooled, solidified, and sealed.

  While heating the inside of the PDP 1 sealed at the periphery of the front panel 2 and the back panel 10 and having the exhaust pipe 22 sealed and joined to one corner of the back panel 10 to a temperature below the softening point of the sealing member 31 It is evacuated by an exhaust device. Furthermore, after evacuation, the exhaust gas is cooled to a predetermined temperature, and a discharge gas containing neon, xenon, or the like is sealed from the exhaust pipe 22 at a predetermined pressure (for example, a pressure of 50 KPa to 80 KPa in the case of Ne-Xe mixed gas). . Thereafter, a predetermined portion of the exhaust pipe 22 is locally heated and melted and sealed to complete the hermetically sealed PDP 1.

  In the above method, sealing and exhaust have been described as separate processes. However, if the exhaust process is performed when the temperature reaches a predetermined temperature below the softening point of the sealing member in the cooling process after sealing, It is also possible to process up to.

  Here, the PDP sealing member and the sealing method in the embodiment of the present invention will be described in more detail.

The composition of the sealing member 21 which is the first sealing member used for sealing the peripheral portions of the front panel 2 and the back panel 10 is 70% to 75% by weight of bismuth oxide (Bi ₂ O ₃ ), zinc oxide. (ZnO) 8% to 10 wt%, boron oxide _(B 2 _{O 3)} is 4% to 6 wt%, aluminum oxide _{(Al 2 O} 3) 6% to 8 wt%, silicon oxide (SiO ₂ ) Or magnesium oxide (MgO) in a composition of 1 wt% to 3 wt%. In particular, if the amount of bismuth oxide (Bi ₂ O ₃ ) is too small, the softening point of the glass is increased. On the other hand, if the amount is too large, the crystallization temperature is lowered and a good sealing cannot be obtained. Set to% by weight. In addition, the composition containing bismuth oxide (Bi ₂ O ₃ ) has a softening point of about 440 ° C. which is lower than the softening point or melting point of the constituent material constituting the PDP. It is possible to soften without giving.

  Moreover, in this sealing member 21, in order to adjust the thermal expansion coefficient and control the flow state of the glass, cordierite, forsterite, β-eucryptite, zircon, mullite, barium titanate, aluminum titanate A filler such as titanium oxide, molybdenum oxide, tin oxide, aluminum oxide, or quartz glass may be used as appropriate.

On the other hand, when sealing and joining the exhaust pipe 22 with the rear panel 10 facing downward as shown in FIG. 3B, sealing the exhaust pipe 22 as shown in FIG. 6B. It is important that the shape of the joint portion 25 is a shape without drooping. In order to suppress such drooping,
The sealing member 31 as the second sealing member has a softening point higher than that of the sealing member 21 that seals the front panel 2 and the back panel 10 and contracts at least when a predetermined sealing temperature is reached. Strict material composition is required so that the glass frit has the characteristics of completing the process.

In the embodiment of the present invention, the composition of the sealing member 31 as the second sealing member is 67 wt% to 73 wt% of bismuth oxide (Bi ₂ O ₃ ) and 8 wt% of zinc oxide (ZnO). ˜11 wt%, boron oxide (B ₂ O ₃ ) 4 wt% to 6 wt%, and the remaining components are cordierite. The composition of the sealing member 31 is different from the composition of the sealing member 21 in that the ratio of bismuth oxide (Bi ₂ O ₃ ) is reduced and silicon oxide (SiO ₂ ) or magnesium oxide (MgO) is not included. Is that the filler is limited to cordierite.

In particular, as glass components, bismuth oxide (Bi ₂ O ₃ ) is 67 wt% to 73 wt%, zinc oxide (ZnO) is 8 wt% to 11 wt%, and boron oxide (B ₂ O ₃ ) is 4 wt% to 4 wt%. By including only 6% by weight, the glass softening point of the sealing member 31 is made higher by about 10 ° C. than the softening point of the sealing member 21, and the shrinking process is performed at a sealing temperature of 490 ° C. to 495 ° C. The material composition is complete. Further, the filler is a component only of cordierite and does not affect the softening point and shrinkage temperature, and further matches the thermal expansion coefficient of the glass substrate and exhaust pipe of the back panel.

  FIG. 5 is a cross-sectional view showing the shape of the sealing joint 23 of the exhaust pipe 22 of the PDP in the embodiment of the present invention. Also, in Table 1, a sample in which the material composition of the sealing member 31 is changed in the embodiment of the present invention, the shape of the sealing joint portion 23 between the back panel 10 and the exhaust pipe 22 of the sample, and The defect situation of the sealing joint 23 after the exhaust pipe 22 is locally heated and melted and sealed is shown. In particular, the shape of the sealing joint 23 is shown by using the angle θ in FIG. Moreover, the sealing temperature at the time of producing these samples is 490 degreeC.

The composition of the sealing member 21 is such that the glass frit component is 70% to 75% by weight of bismuth oxide (Bi ₂ O ₃ ), 8% to 10% by weight of zinc oxide magnesium oxide (MgO), and oxidized. Boron (B ₂ O ₃ ) 4 wt% to 6 wt%, Aluminum oxide (Al ₂ O ₃ ) 6 wt% to 8 wt%, Silicon oxide (SiO ₂ ) or Magnesium oxide (MgO) 1 wt% to 3 wt% The same amount of cordierite, mullite, and zircon is mixed as filler.

As shown in Table 1, the sealing joint 23 hangs down even if the sample No1 and No2 are sealed in a state where the angle θ exceeds 90 ° and the exhaust pipe 22 is disposed downward with respect to the back panel 10. This shows that strong bonding without any of these is possible. On the other hand, when bismuth oxide (Bi ₂ O ₃ ) exceeds 73% by weight as in No11, the softening point temperature of the glass frit decreases and the angle θ decreases. As a result, sagging of the sealing joint 23 occurs, and further defects occur. In contrast, in sample No. 10 in which bismuth oxide (Bi ₂ O ₃ ) is less than 67% by weight, the angle θ increases, but the shrinkage process is completed early in the sealing step, which causes a defect. . Therefore, the composition of the glass frit is desirably 67 to 73% by weight of bismuth oxide (Bi ₂ O ₃ ).

On the other hand, samples No. 3 to No. 9 are the results when the other component ratios are changed with bismuth oxide (Bi ₂ O ₃ ) within the above range.

Samples No. 3 and No. 4 show the case where aluminum oxide (Al ₂ O ₃ ), silicon oxide (SiO ₂ ), and magnesium oxide (MgO) are added. It can be seen that there is no defect that can be observed in Fig. 1, but stress concentration may occur, which is undesirable.

  In sample No. 5, mullite and zircon are used as fillers instead of cordierite. In this case, the coefficients of expansion of the back glass substrate 11 or the exhaust pipe 22 become inconsistent and defects are generated. Therefore, it is preferable to use cordierite alone as the filler.

Samples No. 6 to No. 9 show the results when the ratio of zinc oxide (ZnO) and boron oxide (B ₂ O ₃ ) is changed. Zinc oxide (ZnO) is 8 wt% to 11 wt%, boron oxide ( B ₂ O ₃ ) is preferably added in an amount of 4 to 6% by weight.

  As described above, in the PDP in the embodiment of the present invention, bismuth oxide is 67 wt% to 73 wt% and zinc oxide is 8 wt% as the sealing member 31 for sealing and joining the exhaust pipe 22 to the back panel 10. Frit glass containing ˜11 wt%, boron oxide 4 wt% ˜6 wt% and the remaining component being cordierite is molded into a tablet and used. By sealing with this tablet at a predetermined sealing temperature, the tablet melts more slowly than the sealing member that seals and joins the front panel and the back panel in the sealing temperature region, and the sealing temperature When it reaches, the contraction process is completed. As a result, even when the exhaust pipe is sealed and bonded to the rear panel, there is no drooping phenomenon at the sealed joint of the exhaust pipe and the rear panel is bonded at an optimal angle that can increase the bonding area. Can be sealed.

  Therefore, since the joining area is enlarged, the stress due to thermal strain at the time of sealing the exhaust pipe is dispersed, and a highly reliable PDP that can withstand thermal shock and the like can be realized.

  According to the present invention, a highly reliable PDP using a sealing member made of a lead-free glass frit is realized, which is useful for an environmentally friendly large-screen display device and the like.

The perspective view of the principal part which shows the structure of PDP in embodiment of this invention The figure which shows the state which sealed and joined the front panel and back panel of the PDP Sectional drawing which shows the sealing procedure of the PDP The perspective view which shows the tablet used for sealing with the back panel and exhaust pipe of the PDP Sectional drawing which shows the shape of the sealing junction part of the exhaust pipe of the PDP Sectional drawing which shows the positional relationship of a back panel and an exhaust pipe at the time of sealingly joining an exhaust pipe in PDP

Explanation of symbols

1 PDP
DESCRIPTION OF SYMBOLS 2 Front panel 3 Front glass substrate 4 Scan electrode 5 Sustain electrode 6 Display electrode pair 7 Light shielding layer 8 Dielectric layer 9 Protective layer 10 Back panel 11 Rear glass substrate 12 Address electrode 13 Base dielectric layer 14 Partition 15 Phosphor layer 16 Discharge Space 21 (First) sealing member 31 (Second) sealing member 22 Exhaust pipe 23, 25 Sealing joint 24 Exhaust narrow port 33 Tablet 32 Opening 41 Exhaust pipe head 42 Elastic means

Claims (2)

A front panel and a back panel are arranged opposite to each other, and a discharge space is formed by sealing the periphery of the front panel and the back panel with a first sealing member, and the discharge space is exhausted and a discharge gas is enclosed. A plasma display panel in which an exhaust pipe is sealed and joined to at least one of the front panel or the back panel with a second sealing member,
The composition of the second sealing member is 67% to 73% by weight of bismuth oxide, 8% to 11% by weight of zinc oxide, 4% to 6% by weight of boron oxide, and the remaining components are cords. A plasma display panel characterized by being frit glass which is a light. The composition of the first sealing member is 70% to 75% by weight of bismuth oxide, 8% to 10% by weight of zinc oxide, 4% to 6% by weight of boron oxide, and 6% by weight of aluminum oxide. The plasma display panel according to claim 1, wherein the plasma display panel is a frit glass containing ˜8 wt% and silicon oxide or magnesium oxide of 1 wt% to 3 wt%.

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