JP2000030606A - Plasma display panel barrier forming composition, barrier forming recessed plate, formation of barrier, and plasma display panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a barrier, which can be easily released from a recessed plate, for a highly precise and high density display panel at low costs by using water as a solvent. SOLUTION: Slurry 14 is poured into a recessed part of a barrier forming recessed plate 11 by means of a squeegee and the like, and the barrier forming recessed plate 11 is reversed after a glass substrate 13 is pressed to the barrier forming recessed plate 11 upper part. After water content of the slurry 14 is absorbed, the barrier forming recessed plate 11 is lifted up, and the slurry 14 is transferred to the glass substrate 13 so as to be burnt. Desirably, the recessed plate 11 is made of a material with a barrier forming composition solvent absorbing characteristic and provided with a recessed part in a predetermined pattern. For this material, gypsam is suitable, and the recessed plate 11 is provided with a mold releasing layer formed in the recessed part. Preferably, the recessed part face side of the barrier forming recessed plate 11 is pressed to the substrate 13 after a barrier forming composition is applied to the substrate 13, the recessed part is filled with the composition, a solvent in the composition is absorbed so that the composition is hardened, the recessed plate 11 is released from the substrate 13, and then, burning is carried out for forming a barrier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for manufacturing a plasma display panel, and more particularly, to an intaglio for forming a barrier constituting a cell as a discharge space, a method of forming a barrier using the same, and a method for forming the same. The present invention relates to a plasma display panel manufactured by the method.

[0002]

2. Description of the Related Art A plasma display panel, which is generally a gas discharge panel, has a large number of minute discharge spaces sandwiched between two substrates. In order to prevent crosstalk of ultraviolet light, it is necessary to reliably obtain the discharge space. Therefore, it is necessary to provide a barrier having a line width of about 10 μm and a height of about 150 to 200 μm.

[0003] Various methods have been proposed as a method for producing a barrier having such a three-dimensional structure. Examples thereof include a screen printing method, a sand blast method based on a photolithography technique, a lift-off method, and a photosensitive paste method.

The sand blast method, the lift-off method, the photosensitive paste method, and the like based on the photolithography technique are excellent in positional accuracy and pattern shape, but have disadvantages in that the process is long and the production cost is high. On the other hand, in the screen printing method, since the thickness of the barrier forming composition printed at one time is several tens of μm, the productivity of repeating printing several times is low, and the electrode portion formed by photolithography is low. There is a problem that it is difficult to match the position.

[0005] Another method of forming a barrier of a plasma display panel is a transfer method. This is a method in which a barrier-forming composition embedded in a concave portion in an intaglio plate is molded in a plate and transferred to a substrate. This method has an advantage that both the production cost and the positional accuracy are superior to any of the above-described barrier forming methods. However, in practice, the composition for barrier formation breaks during the transfer from the intaglio to the substrate,
There are problems such as not getting out of the version. Conventional intaglio is made by cutting metal.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and it is an object of the present invention to provide a high-precision, low-cost, excellent plate removal from an intaglio. An object of the present invention is to provide a method for forming a barrier of a high density plasma display panel.

[0007]

The present invention takes the following measures to solve this problem. The invention according to claim 1 is a composition for forming a barrier of a plasma display panel, wherein water is used as a solvent.

According to a second aspect of the present invention, there is provided a plasma display panel, comprising a material having a property of absorbing a solvent of a composition for forming a barrier of the plasma display panel, and having a concave portion of a predetermined pattern. Intaglio for barrier formation.

A third aspect of the present invention is the intaglio for barrier formation according to the second aspect, wherein the material having the property of absorbing the solvent of the composition for barrier formation of a plasma display panel is gypsum. .

According to a fourth aspect of the present invention, there is provided an intaglio for barrier formation, comprising the intaglio for barrier formation according to the second or third aspect and a release layer formed in a concave portion of the intaglio. .

According to a fifth aspect of the present invention, after filling the recess-forming composition of the second or fourth aspect with the composition for forming the barrier, the solvent in the composition for forming the barrier is filled with the solvent in the intaglio for forming the barrier. To cure the composition for barrier formation and
After transferring the cured product on a base plate, a barrier forming method, a plasma display panel and forming a barrier by baking.

According to a sixth aspect of the present invention, the barrier-forming composition is applied on a substrate, and the barrier-forming intaglio of the second or fourth aspect is coated with the barrier-forming composition. Pressing the substrate, filling the recess with the barrier-forming composition, allowing the solvent in the barrier-forming composition to be absorbed by the barrier-forming intaglio, and curing the barrier-forming composition. And forming a barrier pattern on the substrate by sintering, and forming the barrier by firing.

According to a seventh aspect of the present invention, there is provided a plasma display panel wherein a barrier is formed by the barrier forming method according to the fifth or sixth aspect.

According to a fifth aspect of the present invention, a low-cost and high-precision plasma display panel barrier is formed by a method of curing a barrier-forming composition in an intaglio and transferring the cured product onto a substrate. A method of forming a barrier for a plasma display panel, wherein an intaglio plate made of a material having a property of absorbing a solvent in the barrier forming composition is used, and the barrier forming composition is contracted and cured.

According to a sixth aspect of the present invention, a pressure-sensitive adhesive layer is provided on a substrate, the composition for forming a barrier is applied, and a concave portion of the intaglio for forming a barrier is pressed against the substrate to fill the concave portion with the composition for forming a barrier. After that, the present invention can be applied to the case where the intaglio for barrier formation is lifted to form a pattern. As the adhesive layer, an adhesive or an adhesive (heat, UV, electron beam curing, etc.) can be used, but is not limited thereto.

[0016]

Embodiments of the present invention will be described below. The intaglio plate for forming a barrier in the present invention has a property of absorbing a solvent in the composition for forming a barrier, and is required to be excellent in processability and shape stability of the plate. For example, a gypsum mold is used. Even if it is a material other than the gypsum mold, any material that satisfies the above conditions can be applied as a material for the barrier-forming intaglio.

The method of manufacturing the intaglio for forming the barrier includes the following:
There is a method of forming a pattern by transfer using a mold, and a method of forming a pattern by shaving off a concave portion by sandblasting, but is not limited thereto.

In the transfer from the intaglio for forming the barrier to the substrate, when gypsum is used as the intaglio for forming the barrier, a slurry containing 20 to 40% by weight of water is used as the composition for forming the barrier. Is preferred. In addition to water, it is composed of low melting point glass frit, aggregate, binder, plasticizer, deflocculant, wetting agent and the like. As the low melting point glass frit, lead-based glass or phosphate-based glass is used, but not limited thereto. Further, in order to impart water resistance, Al ₂ O ₃ ,
0.1 to 1 component that enhances chemical durability such as ZrO ₂
It shall be contained in the range of 0% by weight.

The composition for forming a mud or barrier is poured into the recess of the intaglio for forming a barrier, and the solvent in the composition for forming a mud or barrier is absorbed into the intaglio for forming a barrier. Improve the particle density of the solute in it. Due to the increase in the particle density, the slurry or the composition for forming a barrier shrinks and hardens. Due to this shrinkage, the releasability from the intaglio for barrier formation is improved. Also,
By controlling the amount of water absorbed during curing, it is possible to control the particle density between the outer surface and the inside of the barrier. That is, the particle density of the outer surface, which is the portion in contact with the mold, is improved, and the denseness of the outer surface of the barrier is excellent. Furthermore, the shape of the fired barrier can be controlled.

The composition for forming a barrier according to claim 1 refers to this slurry. The difference between the slurry and the conventional barrier-forming composition is the difference in the solvent. The solvent of the composition for forming a barrier according to claim 1, that is, the slurry is water, and the solvent of the conventional composition for forming a barrier is an organic solvent.

Further, in order to improve the releasability of the cured barrier-forming composition from the barrier-forming intaglio, the friction between the barrier-forming intaglio and the cured barrier-forming composition is reduced so that the barrier-forming intaglio is reduced. By applying a fluororesin, silicone rubber, or the like to a part of the intaglio, the releasability can be enhanced. In order not to impair the water absorption of the mold,
It is preferable to use a technique of spraying a small amount of these resins by a technique such as spraying.

Next, the cured slurry or the composition for forming a barrier is transferred to a printing substrate. By firing this, an inorganic barrier can be formed. In the present invention, the amount of resin in the slurry or the composition for forming a barrier can be minimized, so that a dimensional change after firing is small and a high-density barrier can be formed.

In the present specification, an example of a concave portion having a predetermined pattern is a concave portion on a stripe having a width of 150 μm, a depth of 200 μm, and a pitch of 420 μm, but is not limited to this size.

The barrier-forming composition described in claims 5 and 6 can be absorbed by the barrier-forming intaglio described in the present specification as well as the barrier-forming composition described in claim 1. It also refers to other barrier-forming compositions using a solvent.

As described above, according to the present invention, it is possible to form a high-precision and high-density barrier on the back plate of a plasma display panel using the intaglio transfer method.

[0026]

1 to 12 show steps of a method of forming a barrier of a plasma display panel according to this embodiment.

<Example 1> First, a slurry is prescribed.
The composition of the slurry was as follows. Low melting glass frit 63 parts by weight B ₂ O ₃ 3 parts by weight SiO ₂ 35 parts by weight PbO 56 parts by weight ZrO ₂ 3 parts by weight Al ₂ O ₃ 2 parts by weight CaO 1 part by weight Al ₂ O ₃ 10 parts by weight Water 20 parts by weight Polyvinyl alcohol 2 parts by weight Methylcellulose 3 parts by weight Butylbenzyl phthalate 1 part by weight Allylsulfonic acid 1 part by weight

A gypsum mold is used as an intaglio for forming a barrier. The plaster mold was made by casting a mixture of calcined gypsum and water into the mold. As shown in FIG. 1, a slurry 10 having the above composition is poured into a recess of a barrier-forming intaglio 11 by a squeegee 12. The glass substrate 13 is pressed against the upper part of the intaglio for barrier formation, and is inverted as shown in FIG.

Next, after the water absorption of the slurry proceeds, the intaglio for barrier formation is lifted as shown in FIG. 3, and the pattern 14 is transferred to the substrate. This is baked at 580 ° C. for 20 minutes to obtain a width of 100 μm and a height of 120 μm as shown in FIG.
m barriers 15 could be produced.

<Example 2> First, a prescription of a slurry is made. The composition of the slurry was as follows. Low-melting glass frit 55 parts by weight B ₂ O ₃ 3 parts by weight SiO ₂ 35 parts by weight PbO 56 parts by weight ZrO ₂ 3 parts by weight Al ₂ O ₃ 2 parts by weight CaO 1 part by weight Al ₂ O ₃ 10 parts by weight of water 20 parts by weight Polyvinyl alcohol 3 parts by weight Methyl cellulose 5 parts by weight Ethyl cellulose 5 parts by weight Butylbenzyl phthalate 1 part by weight Allylsulfonic acid 1 part by weight

After applying the adhesive layer 16 to the glass substrate 13 to a thickness of 10 μm using an applicator, as shown in FIG. 5, a slurry is applied by screen printing. Next, FIG.
The plaster mold is pressed from above as shown in FIG.

Next, after the water absorption of the slurry proceeds, the intaglio is lifted as shown in FIG. 7, and the pattern 14 is transferred to the substrate. By baking this at 580 ° C. for 20 minutes, the adhesive layer was evaporated, and the width was 100 μm and the height was 12 μm as shown in FIG.
The barrier 15 having a thickness of 0 μm was able to be manufactured.

<Example 3> First, a prescription for the slurry is made. The composition of the slurry was the composition described in [0021] of Example 1.

The gypsum mold is used for an intaglio for forming a barrier.
A silicone resin is sprayed on a part of the gypsum mold as shown in FIG. This resin was sprayed in a small amount so as not to impair the water absorption of the plate. Next, the slurry 10 having the above composition is poured into the recess of the barrier-forming intaglio 11 by the squeegee 12. The glass substrate 13 is pressed against the upper part of the intaglio for barrier formation, and is inverted as shown in FIG.

Next, after the water absorption of the slurry has progressed, FIG.
The pattern 14 is transferred to the substrate by lifting up the intaglio for barrier formation as described above. This was baked at 580 ° C. for 20 minutes to obtain a width of 100 μm and a height of 120 μm as shown in FIG.
m barriers 15 could be produced.

[0036]

According to the method for forming a barrier of a plasma display panel of the present invention, by utilizing an intaglio having a property of absorbing a solvent in a composition for forming a barrier, there is no need to use a thermosetting or photocuring technique. Then, the transfer of the composition for forming a barrier having excellent releasability and retentivity can be performed. In addition, according to this method, good line width accuracy (100 μm) can be obtained, and dimensional change after pattern firing is small (20% or less).
Therefore, it is possible to provide a method for manufacturing a high-precision and high-density plasma display rear panel barrier.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a slurry embedding process according to one embodiment of the present invention.

FIG. 2 is a cross-sectional view illustrating a barrier pattern transfer process according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating a barrier pattern transfer process according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a barrier according to one embodiment of the present invention.

FIG. 5 is a cross-sectional view of a slurry applying step according to one embodiment of the present invention.

FIG. 6 is a cross-sectional view illustrating a step of forming a barrier pattern according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating a step of forming a barrier pattern according to an embodiment of the present invention.

FIG. 8 is a sectional view of a barrier according to one embodiment of the present invention.

FIG. 9 is a sectional view of a slurry embedding step according to an embodiment of the present invention.

FIG. 10 is a cross-sectional view of a barrier pattern transfer step according to one embodiment of the present invention.

FIG. 11 is a cross-sectional view of a barrier pattern transfer step according to one embodiment of the present invention.

FIG. 12 is a cross-sectional view of a barrier according to one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10: mud 11: intaglio for barrier formation 12: squeegee 13: glass substrate 14: mud 15: barrier 16: adhesive layer 17: silicone rubber

Claims (7)

[Claims] 1. A composition for forming a barrier of a plasma display panel, wherein water is used as a solvent. 2. An intaglio plate for forming a barrier of a plasma display panel, wherein the intaglio plate is formed of a material having a property of absorbing a solvent of a composition for forming a barrier of the plasma display panel and has a predetermined pattern of concave portions. 3. The intaglio for barrier formation according to claim 2, wherein the material having a property of absorbing the solvent of the composition for barrier formation of a plasma display panel is gypsum. 4. An intaglio for barrier formation, comprising the intaglio for barrier formation according to claim 2 and a release layer formed in a concave portion of the intaglio for barrier formation. 5. A barrier-forming intaglio according to claim 2 or 4, wherein after filling the recess-forming composition with the barrier-forming composition, a solvent contained in the barrier-forming composition is absorbed by the barrier-forming intaglio. A method for forming a barrier of a plasma display panel, comprising: curing a barrier-forming composition; transferring the cured product onto a substrate; and baking to form a barrier. 6. A barrier-forming composition is applied on a substrate, and the recessed surface side of the barrier-forming intaglio according to claim 2 or 4 is pressed against the substrate on which the barrier-forming composition has been applied. Is filled with the barrier-forming composition, the solvent in the barrier-forming composition is absorbed by the barrier-forming intaglio, and the barrier-forming composition is cured. Forming a barrier pattern by forming a barrier pattern and baking the same. 7. A plasma display panel, wherein a barrier is formed by the barrier forming method according to claim 5.