JP2001167698A - Method of manufacturing substrate having barrier rib - Google Patents

Abstract

(57) [Summary] A substrate having a high-precision barrier rib used for a gas discharge display panel such as a plasma display panel is provided.
It is to provide a simple and low-cost manufacturing method. SOLUTION: In a method for manufacturing a substrate having a barrier rib by forming a barrier rib while coating a paste on a substrate with a roll having a groove, the method comprises cooling the roll, forming the roll by heating or forming the roll. Either a method in which a voltage is applied to the mold or a method in which a solvent is sprayed on the shaped paste to form the paste is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method of manufacturing a substrate having barrier ribs (partitions), and more particularly to a method of manufacturing a substrate having high-precision barrier ribs used for a gas discharge display panel such as a plasma display panel. .

[0002]

2. Description of the Related Art In a gas discharge display panel such as a plasma display, for example, as shown in FIG. 7, a large number of barrier ribs 102 are formed on one surface of a back plate 101, and cells 103 are formed between the barrier ribs 102. A substrate provided with an electrode 104 on the bottom surface is referred to as a substrate 105. This substrate 1
On the other hand, a phosphor is applied to the inner wall surface 106 of the cell 103 while the front plate 108 having the electrode 107 is
A gas discharge display panel is formed by joining the barrier rib 102 of FIG.

Conventionally, as a method of forming a barrier rib in a gas discharge display panel such as a plasma display panel, a screen printing method, a sand blast method, a photosensitive paste method, a lift-off method, a mold pressing method, and the like are known.

In these methods, in the screen printing method, first, a glass paste pattern is printed on a substrate by screen printing and dried. After repeating such a process to form a protrusion having a predetermined height, the protrusion is fired to form a barrier rib. However, such a method has poor pattern width accuracy and a large pattern pitch shift,
There has been a problem that it is difficult to cope with high definition and large screen of the display panel.

In the sand blast method, first, a glass paste having a predetermined thickness is coated on a substrate, and a portion where a barrier rib is to be formed is masked with a photosensitive resin. next,
After removing unnecessary portions not covered by the mask by sandblasting, the remaining convex portions are baked to form barrier ribs. In this method, since much of the glass paste is discarded, there is a problem that the utilization efficiency of the material is low, the blast material is difficult to reuse, and the cost is high.

In the photosensitive paste method, after coating a paste containing a photosensitive resin component, a portion corresponding to a barrier rib is exposed and insolubilized. Next, after the unnecessary portion is removed by development, the remaining convex portion is baked to form a barrier rib.
This method has a problem that the utilization efficiency of the paste is low and it is difficult to form a barrier rib having a predetermined height at a time. Furthermore, since the photosensitive resin has poor thermal decomposability, when a paste containing the photosensitive resin is baked,
Resin residues tend to remain in the barrier ribs, and there is a problem that the remaining resin residues as impurities cause deterioration in the display performance of the gas discharge display panel.

In the lift-off method, first, a photosensitive resin is coated, and then the photosensitive resin in a portion where a barrier rib is to be formed is removed by exposure and development. This is repeated to form a concave portion having a predetermined depth. Next, the recess is filled with a paste, the photosensitive resin is removed, and the filled paste is baked to form a barrier rib. In this method, there is a problem that the cost of the photosensitive resin is high, and it is difficult to form a barrier rib having a required height with a single coating of the photosensitive resin.

In the mold pressing method, a paste is poured into a mold having the shape of a barrier rib, transferred to a substrate, and then baked to form a barrier rib. In this method, it is necessary to manufacture a mold having the same size as the display panel, so that there is a problem that the cost of the mold is high and the positional accuracy is not good due to a difference in thermal expansion coefficient between the mold and the substrate.

As another method of forming barrier ribs, Japanese Patent Application Laid-Open No. 10-302614 discloses a method in which a glass paste is coated on a substrate, and a roll having grooves in the form of barrier ribs is pressed against the coating to apply the coating to the barrier ribs. A method has been proposed in which, after shaping into a shape as described above, it is fired to form a barrier rib. This method has a feature that the barrier rib precursor having a predetermined height can be formed by one molding with high utilization efficiency of the glass paste, and the number of steps is small, so that the barrier rib can be formed at low cost. However, in this method, when a paste having high fluidity and good moldability is used, after the barrier rib precursor is formed by the grooved roll, the paste flows and loses its shape, and a barrier rib having an accurate shape cannot be formed. There was a problem.

On the other hand, when a paste having low fluidity is used,
Even when pressed with a grooved roll, there is a problem that the paste does not flow to the depth of the groove and only a blunt barrier rib precursor can be formed. In this case, when the roll pressure is increased in order to make the paste flow to the depth of the groove of the roll, the substrate is deformed and the positional accuracy is deteriorated, and the entire apparatus also needs to be high in strength, which increases the cost. There was a problem. In the method of forming with such a grooved roll, even if the viscosity of the paste is adjusted, the barrier rib precursor having a predetermined height is formed, and the formed barrier rib precursor is formed into a predetermined shape without flowing after forming. There has been a problem that it is difficult to achieve compatibility with maintaining the shape.

[0011] As a method for maintaining the flowability of forming a barrier rib precursor having a predetermined height in the paste, and reducing the flowability after molding to maintain the shape of the barrier rib precursor,
After coating the paste with the solvent remaining, it is molded with a grooved roll heated to a high temperature and shaped, while the solvent is evaporated and the molded paste is hardened to lose the fluidity. Japanese Patent Laid-Open Publication No. HEI 1 (1999) -1995 discloses a method of coating a paste containing a water-soluble resin, and then irradiating ultraviolet rays during roll forming to harden the paste to lose fluidity.
No. 0-188793. However, in the method of evaporating the solvent by a heating roll, the temperature of the roll is as high as 200 to 300 [deg.] C., a large amount of energy is required for heating the roll, and the heat insulation of the roll is required. However, there was a problem that the cost of the method became high. Curing with ultraviolet light takes a long time, it takes a long time to mold, and the productivity is low, and the resin cured by ultraviolet light tends to remain during baking, deteriorating the performance of display elements as impurities in barrier ribs. There was a problem of letting it.

[0012]

In manufacturing a gas discharge display panel such as a plasma display panel, it is necessary to form a barrier rib for a display cell. In a conventional method for forming a barrier rib, for example, a screen printing method, the accuracy of the pattern width is poor, a plurality of overlapping printings are required to form a barrier rib having a predetermined height, and the pattern pitch shift is large. In the sandblasting method, material utilization efficiency is low. In the photosensitive paste method, the utilization efficiency of the paste is low, and it is difficult to form a barrier rib having a predetermined height at one time, and a thermal decomposition residue of the photosensitive resin remains in the barrier rib. Also, in the lift-off method, the cost of the photosensitive resin is high, and it is difficult to form a barrier rib having a predetermined height at one time. In the die press method, the cost of the die is high and the positional accuracy is poor. As described above, the conventional method for forming the barrier rib has various problems. Further, in the method in which a glass paste is applied to a substrate and then pressed by a roll having a groove to form the paste, there is a problem that the paste easily flows and is deformed after the molding. The method of evaporating the solvent with a heating roll that solves this problem has a problem that the roll temperature is high and the apparatus cost is high. Also, in the method using a photosensitive paste that solves the above-described problem, there is a problem in that the thermal decomposition residue of the resin in the photosensitive paste remains in the barrier ribs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is capable of accurately forming a barrier rib having a predetermined height in a small number of steps and manufacturing a substrate having a barrier rib having a high material use efficiency. It provides a method.

[0014]

According to the first method of manufacturing a substrate having barrier ribs according to the present invention, a predetermined amount of a paste composed of a mixture of a ceramic filler, a glass powder, a binder and an organic solvent is caused to flow down onto the substrate. Pressure is applied to the paste while rotating a cooled roll having grooves in the form of barrier ribs to coat the paste on the substrate and simultaneously form a barrier rib precursor.

The method of manufacturing a substrate having a second barrier rib according to the present invention is the method of manufacturing a substrate having the first barrier rib described above, wherein the paste is cooled by setting the roll temperature to be at least about 20 ° C. lower than the paste temperature. While forming the barrier rib precursor.

According to a third method of manufacturing a substrate having barrier ribs according to the present invention, a predetermined amount of a paste composed of a mixture of a ceramic filler, glass powder, a binder and an organic solvent is placed on a substrate to form a barrier rib-shaped groove. Pressure is applied to the paste while rotating a roll heated to a temperature at which the paste flows, so that the paste is coated on the substrate and a barrier rib precursor is formed at the same time.

According to the fourth method of manufacturing a substrate having barrier ribs according to the present invention, in the method of manufacturing a substrate having third barrier ribs described above, the roll temperature is higher by about 20 to 30 ° C. than the temperature of the paste installed on the substrate. That is, the barrier rib precursor is formed while flowing the paste when the paste is in contact with the roll.

According to a fifth method of manufacturing a substrate having barrier ribs according to the present invention, a paste comprising a mixture of a ceramic filler, a glass powder, a binder and an organic solvent is caused to flow on the substrate by a predetermined amount to form a barrier rib-shaped groove. Pressure is applied to the paste while rotating the roll having the barrier rib precursor formed at the same time as coating the paste on the substrate, and immediately after this, the solvent having low solubility in the binder and compatible with the organic solvent is used as the solvent. Spray coating on the barrier rib precursor.

According to a sixth aspect of the present invention, there is provided a method for producing a substrate having a barrier rib, comprising a mixture of a ceramic filler, a glass powder, a binder and an organic solvent, the paste of a negative electrorheological fluid whose viscosity is reduced by applying a voltage. Is placed on the substrate in a predetermined amount, pressure is applied to the paste while rotating a roll having a voltage having a barrier rib-shaped groove, and the paste is coated on the substrate and simultaneously a barrier rib precursor is formed. .

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below.
This will be described in detail with reference to the drawings.

Embodiment 1 FIG. 1 is a schematic view showing each step of forming a barrier rib precursor in a method for manufacturing a substrate having barrier ribs according to the first embodiment. FIG. 2 is a schematic view of a roll having a circumferential groove. FIG. 3A is a schematic top view of a substrate having a formed barrier rib, and FIG. 3B is a schematic view of a cross section taken along line CC of the schematic top view. In the figure, 1 is a substrate, 2 is a paste, 3 is a barrier rib precursor, 4 is a barrier rib, 5 is a substrate having a barrier rib,
10 is a molding device, 11 is a support, 12 is a roll, 13 is a circumferential groove, and 14 is a cooling unit.

In the present embodiment, first, a paste 2 is prepared by mixing a ceramic powder, a glass powder, a binder and a solvent and flowing at 50 ° C. or higher. Next, as shown in FIG. 1, the substrate 1 preheated to 50 to 60 ° C.
(A). Next, 50-60 ° C
Paste 2 in a fluidized state by heating to 50-60 ° C.
At the same time as flowing down to the end of the substrate 1 which has been preheated, and at a predetermined interval corresponding to the barrier rib 4, a circumferential groove 1 having a predetermined width and a predetermined depth.
The roll 12 having the roller 3 is rotated while pressing against the paste 2 (b). At this time, the roll 12 is cooled to 10 ° C. or lower by the refrigerant from the cooling unit 14, and the paste 2 is coated on the substrate 1 and cooled to room temperature (25 ° C.) or lower. Paste 2
At the time of molding by the roll 12, it has sufficient fluidity,
It enters the circumferential groove 13 of the roll 12 and is shaped into the barrier rib precursor 3. When the paste 2 is formed by a roll, it is cooled, its viscosity increases, and the shape of the barrier rib precursor 3 is maintained. Next, after the solvent is dried, the substrate 5 having barrier ribs of predetermined dimensions with excellent precision is formed by a baking treatment at 450 to 600 ° C. for 10 minutes.

Here, the pressing force of the roll 12 is, for example,
The contact length of the roll 12 with the paste 2 in the axial direction is about 0.5 to 5 kg per 1 cm, preferably 0.5 to 5 kg.
About 2.5kg, 50-500 for 100cm contact length
kg, preferably 50-250 kg. That is,
Since the fluid paste 2 is used at the time of molding, the barrier rib precursor 3 can be molded with a small pressing force.

The material of the roll 12 is paste 2
From the viewpoints of ease of cooling and wear resistance to a large amount of hard particles contained in the paste 2, metals are preferable, and for example, stainless steel, hardened steel whose surface is hard chromium-plated, or high-strength steel is preferable. further,
In order to improve the releasability of the paste 2 and the roll 12,
Rolls coated with ethylene tetrafluoride resin can also be used.

The glass powder for the paste 2 is a low melting point glass frit containing PbO as a main component. This low-melting glass frit contains PbO as a main component in an amount of 50% or more, and prevents Al2O3, B2O3, SiO2, MgO, C
Those containing aO, SrO, BaO and the like are generally used. The softening point of the low melting glass frit is 350-65
Those at 0 ° C. are preferred. Softening point of glass frit is 65
If the temperature exceeds 0 ° C., it is necessary to raise the firing temperature, and it takes a long time to raise the temperature during firing, and the production time is undesirably long. It is not preferable because the frit is fused and a gap is formed in the barrier rib 4.

The paste 2 also contains a ceramic filler to stabilize the shape during firing. As the ceramic filler, those that do not soften at a firing temperature of about 500 to 650 ° C. can be widely used, and ceramic fillers such as alumina, magnesia, calcia, cordierite, silica, mullite, zircon, and zirconia are preferably used.

The content of the low melting point glass in the inorganic component composed of the ceramic filler and the glass powder is 50 to 80.
%, More preferably 50 to 70% by weight. If the content is too large, it will be difficult to maintain shape by firing. On the other hand, if the amount is too small, the gaps between the ceramic fillers cannot be sufficiently filled, and the compactness deteriorates, and at the same time, the mechanical strength after firing decreases, resulting in chipping during panel sealing.

It is necessary that the binder burn, decompose and vaporize at a low temperature, and that no carbides remain in the barrier ribs 4. Cellulosic resin,
Or, methyl (meth) acrylate, ethyl (meth) acrylate, normal butyl (meth) acrylate, isobutyl (meth) acrylate, isopropyl (meth)
Acrylic resin composed of a polymer or copolymer such as acrylate, 2-ethylmethyl (meth) acrylate, and 2-hydroxyethyl (meth) acrylate;
α-Methylstyrene, polyvinyl alcohol, polybutene and the like are preferably used. The resin used for these binders is 2.5 to 5.0% by weight based on the inorganic component.
It is preferable to add them in a ratio of the order. This ratio is 2.5
If the amount is less than 5% by weight, the fluidity of the paste 2 is poor, and the barrier rib precursor 3 with high accuracy cannot be formed.
If more, the paste 2 flows too much at the time of molding, and even if the barrier rib precursor 3 is molded while cooling with a roll,
The barrier rib precursor 3 flows and cannot maintain the shape.

The solvent used for the paste 2 is preferably a good solvent for the binder resin used.
Terpineol, butyl carbitol acetate, butyl carbitol and the like are preferably used. The ratio of the solvent added to the paste 2 is 5 to 10% by weight based on the inorganic component.
Is preferred. If the proportion of the solvent is too small, the viscosity of the paste 2 becomes too high, and air bubbles remain in the barrier rib precursor 3. On the other hand, if the amount is too large, the fluidity of the paste 2 increases, and the shape of the barrier rib precursor 3 cannot be maintained.

Embodiment 2 FIG. FIG. 4 is a schematic view showing each step of forming a barrier rib precursor in the method for manufacturing a substrate having barrier ribs according to the second embodiment. In FIG. 4, reference numeral 15 denotes a heating unit.

In this embodiment, first, a paste 2 is prepared by mixing a ceramic powder, a glass powder, a binder and a solvent and flowing at a temperature of 50 ° C. or higher. Next, as shown in FIG. 4, the substrate 1 is set on the support 11 of the molding apparatus 10 (a). Next, the paste 2 heated to a temperature of 50 to 60 ° C. to be in a fluidized state is allowed to flow down to the end of the substrate 1 at room temperature (25 ° C.). 2 is provided (b). Next, a roll 12 having a circumferential groove 13 having a predetermined width and depth at a predetermined interval corresponding to the barrier rib 3 is rotated while being pressed against the paste 2 (c). At this time, the roll 12 is heated by the heat medium from the heating unit 15 to the temperature (25
C.), the paste 2 is heated to a temperature higher by 20 to 30 ° C., and the paste 2 is coated on the substrate 1 and heated. That is, the paste 2 is heated by being brought into contact with the roll 12, and the viscosity thereof is reduced.
And is shaped into the barrier rib precursor 3. After the molding, the temperature of the paste 2 decreases, and the shape is maintained. Next, after drying the solvent, 450 to 6
By performing the baking treatment at 00 ° C. for 10 minutes, the substrate 5 having barrier ribs of a predetermined size with high accuracy is formed.

In the present embodiment, in the step (b) of forming the barrier rib precursor, the paste 2 which has been heated to 50 to 60 ° C. and is in a fluid state is allowed to flow down onto the substrate 1 and the paste 2 is accumulated. Is provided at the end of the substrate 1, but the putty paste 2 in a high viscosity at room temperature may be directly placed at the end of the substrate 1.

The pressing force of the roll 12 and the material of the roll 12 used in this embodiment are the same as those in the first embodiment.
That is, since the roll is made of a metal having a high hardness, the roll has excellent heat conductivity and the paste can be easily heated. In addition, since the paste is heated at the time of molding, and the fluidity is developed, the barrier rib precursor 3 can be molded with a low pressing force. Furthermore, paste 2 used in the present embodiment
The glass powder, the ceramic filler, the resin of the binder, and the solvent are the same as those in the first embodiment.

Third Embodiment FIG. 5 is a schematic diagram showing each step of forming a barrier rib precursor in a method of manufacturing a substrate having a barrier rib according to a third embodiment. In FIG. 5, reference numeral 16 denotes a solvent spray unit; 17 is a nozzle.

In the present embodiment, first, a ceramic powder, a glass powder, a binder and a solvent are mixed at room temperature (2.
5 ° C.) is prepared. Next, as shown in FIG. 5, the substrate 1 is set on the support 11 of the molding apparatus 10 (a). Next, this paste 2 was placed at room temperature (25
C), and at the same time, a roll 12 having a circumferential groove 13 having a predetermined width and depth at a predetermined interval corresponding to the barrier rib 4 is rotated while being pressed against the paste 2 and pressed. (B). Next, the solvent spray unit 1 is added to the barrier rib precursor 3 immediately after being formed from the roll 12.
From the nozzle 17 of No. 6, a solvent that dissolves in the solvent used for the paste 2 but does not dissolve in the binder of the paste 2 is sprayed (c). That is, since the paste 2 has fluidity, the paste 2 is coated on the substrate 1 by a roll and enters the circumferential groove 13 to form the barrier rib precursor 3.
It is shaped into a shape. And the solvent spray unit 1
The binder resin on the surface of the barrier rib precursor reduces the solubility in the solvent by the solvent sprayed from the nozzle 17 of No. 6, and the barrier rib precursor 3 is formed into a film on its surface, and the shape is maintained. Next, after the solvent is dried, a substrate 5 having barrier ribs having predetermined dimensions with excellent precision is formed by a baking treatment at 450 to 600 ° C. for 10 minutes.

The pressing force of the roll 12 and the material of the roll 12 used in the present embodiment are the same as those in the first embodiment.
Further, the glass powder of the paste 2, the ceramic filler, the resin of the binder, and the solvent used in the present embodiment are the same as those in the first embodiment. However, the ratio of the amount of the solvent used for the binder is more than 10% by weight and up to 25% by weight based on the inorganic component. If the ratio of the solvent used for the binder is 10% by weight or less, the fluidity of the paste 2 at room temperature is poor, and if it exceeds 25% by weight, the precipitation of inorganic components such as glass powder occurs in the barrier rib precursor 3. In addition, it becomes difficult to maintain the shape of the barrier rib precursor 3 and the barrier ribs 4 during firing.
Of the barrier ribs 4 is deteriorated, and the accuracy of the barrier ribs 4 is deteriorated.

The spraying solvent used in the present embodiment is a solvent which is soluble in the solvent used for the paste 2 but is insoluble in the binder of the paste 2, and is preferably methyl alcohol, ethyl alcohol, propyl Alcohols such as alcohols, or mixed solvents of these alcohols and water are used. However, the solvent is not limited to these solvents as long as it is soluble in the solvent used for the paste 2 but is not soluble in the binder of the paste 2.

Embodiment 4 FIG. FIG. 6 is a schematic view showing each step of forming a barrier rib precursor in the method for manufacturing a substrate having barrier ribs according to the fourth embodiment. In FIG. 6, reference numeral 18 denotes an electrode, and 19 denotes a power supply unit.

In the present embodiment, first, a paste 2 of a negative electrorheological fluid whose viscosity is reduced by applying a voltage obtained by mixing a ceramic powder, a glass powder, a binder and a solvent is prepared. Next, as shown in FIG. 6, the substrate 1 having electrodes around it is placed on a support 11 of a molding apparatus 10 (a). Next, the paste 2 which has a high viscosity at room temperature and does not flow naturally is placed on one end of the substrate 1 in a state of being in contact with the electrode 18 (b). Next, a roll 12 having a circumferential groove 13 having a predetermined width and depth at a predetermined interval corresponding to the barrier rib 4 is rotated while being pressed against the paste 2 (C). At this time, a voltage is applied between the roll 12 and the electrode 18, the viscosity of the paste 2 decreases, the paste 2 enters the circumferential groove 13 of the roll 12, and is shaped into the barrier rib precursor 3. Is done. Further, when the roll 12 separates from the paste 2, the voltage application is stopped, and the paste 2 is removed.
Increases, and the shape of the barrier rib precursor 3 is maintained. That is, by using a negative electrorheological fluid for the paste 2 and applying a voltage between the roll 12 and the electrode 18 at the time of molding, the viscosity of the paste 2 is reduced at the time of molding, and the paste 2 is formed into a barrier rib precursor 3 shape. Shaped.
After the molding, the application of the voltage is removed and the viscosity of the paste 2 is increased, and the shape of the barrier rib precursor 3 is maintained. Next, after drying the solvent, the substrate 5 having barrier ribs of a predetermined size is formed by a baking treatment at 450 to 600 ° C. for 10 minutes.

The pressing force of the roll 12 used in the present embodiment is the same as in the first embodiment. The material of the roll is preferably a metal, for example, stainless steel, hardened steel with hard chrome plating on the surface, or high-strength steel is suitable. That is, the roll 12 is a metal, which is preferable for applying a voltage to the paste 2 to reduce its viscosity. Further, the glass powder and the ceramic filler used in the paste 2 of the present embodiment are the same as those of the first embodiment.

In the present embodiment, the binder used for paste 2 is a weight ratio of a cellulose resin such as ethyl cellulose, methyl cellulose, nitrocellulose, cellulose acetate, cellulose propionate, cellulose butyrate and an alcohol-modified polyurethane resin. Those blended at a ratio of 2: 1 are preferably used. The compounding amount is the same as in the first embodiment. The solvent used for paste 2 is the same as that in the first embodiment.

In the present embodiment, the roll 12 and the electrode 18
During this time, a voltage of 1 to 5 kv is applied. If the voltage is less than 1 kv, the viscosity of the paste 2 is small and the formation of the barrier rib precursor 3 becomes difficult. Conversely, if the voltage is higher than 5 kv, a short circuit occurs between the roll 12 and the electrode 18, which is not preferable.

[0043]

Next, the present invention will be described in more detail with reference to examples. Example 1. 70 parts by weight of a glass powder mainly composed of lead oxide, 20 parts by weight of a ceramic filler composed of alumina and 10 parts by weight of silica, 3 parts by weight of a binder resin of ethyl cellulose, and 8 parts by weight Of butyl carbitol in a solvent. Next, this paste is heated to 50 ° C., and is poured by a predetermined amount onto a substrate preheated to 50 ° C. set on the support of the molding apparatus described in the first embodiment.

Next, the diameter is 20 cm and the length is 10 cm.
0cm, 80μm wide at the opening and 50μ wide at the bottom
The paste flowing down on the substrate is formed using a stainless steel roll having a groove having a depth of 180 μm and a depth of 180 μm. In this case, the pressing force of the roll is 1 cm in contact length with the paste.
The weight of the roll is 1 kg, that is, 100 kg, and the temperature of the roll is 10 ° C., which is cooled by the refrigerant of the cooling unit. After drying the solvent of the barrier rib precursor formed by such a method, it is baked at 500 ° C. for 10 minutes to obtain a substrate having barrier ribs. The shape of the barrier ribs in the obtained substrate having barrier ribs was 130 μm in height and 80 μm in width at the intermediate height.

Embodiment 2 FIG. A paste similar to that of Example 1 is prepared. Next, this paste is heated to 50 ° C., and then flows down by a predetermined amount onto a normal-temperature substrate set on the support of the molding apparatus described in the second embodiment. The paste is allowed to stand until the temperature of the paste falls to room temperature.

Next, the diameter is 20 cm and the length is 10 cm.
0cm, 80μm wide at the opening and 50μ wide at the bottom
The paste placed on the substrate is formed using a stainless steel roll having a groove having a depth of 180 μm and a depth of 180 μm. In this case, the pressing force of the roll is 1 c in contact length with the paste.
0.8 kg per m, that is, 80 kg, and the temperature of the roll is 50 ° C., being heated by the heating medium of the heating unit. After drying the solvent of the barrier rib precursor formed by such a method, it is baked at 500 ° C. for 10 minutes to obtain a substrate having barrier ribs. The shape of the barrier ribs in the obtained substrate having barrier ribs was 130 μm in height and 80 μm in width at the intermediate height.

Example 3. 70 parts by weight of a glass powder mainly composed of lead oxide, 20 parts by weight of a ceramic filler composed of alumina and 10 parts by weight of silica, 3 parts by weight of a binder resin of ethyl cellulose, A paste composed of 15 parts by weight of a solvent of butyl carbitol is prepared. Next, a predetermined amount of this paste is allowed to flow on a substrate at normal temperature set on the support base of the molding apparatus described in the third embodiment.

Next, the diameter is 20 cm and the length is 10 cm.
0cm, 80μm wide at the opening and 50μ wide at the bottom
The paste flowing down on the substrate is formed using a stainless steel roll having a groove having a depth of 180 μm and a length of 180 μm. In this case, the pressing force of the roll is 1 c in contact length with the paste.
0.8 kg per m, that is, 80 kg, and the temperature of the roll is room temperature (25 ° C.). Next, 50% by weight of a barrier rib precursor immediately after being shaped by a roll was added to the barrier rib precursor from a nozzle of a spray unit provided in a molding apparatus.
Is sprayed with a mixed solvent of ethyl alcohol and 50% by weight of water to maintain the shape of the barrier rib precursor. After drying the solvent of the barrier rib precursor formed by such a method,
After baking at 500 ° C. for 10 minutes, a substrate having barrier ribs is obtained. The shape of the barrier ribs in the obtained substrate having barrier ribs was 125 μm in height and 85 μm in width at the intermediate height.

Example 4. 70 parts by weight of a glass powder mainly composed of lead oxide, a ceramic filler consisting of 20 parts by weight of alumina and 10 parts by weight of silica, 2 parts by weight of ethyl cellulose and 1 part by weight of A negative electrorheological fluid paste comprising a binder resin comprising an alcohol modified polyurethane resin and a solvent of 8 parts by weight of butyl carbitol is prepared. Next, this paste is heated to 50 ° C., and is flowed down and set at a predetermined amount on one end of a normal-temperature substrate set on the support base of the molding apparatus described in the fourth embodiment. The paste is allowed to stand until the temperature of the paste falls to room temperature. At this time, the paste is placed so as to be in contact with the electrodes on the substrate.

Next, the diameter is 20 cm and the length is 10 cm.
0cm, 80μm wide at the opening and 50μ wide at the bottom
The paste placed on the substrate is formed using a stainless steel roll having a groove having a depth of 180 μm and a depth of 180 μm. In this case, the pressing force of the roll is 1 c in contact length with the paste.
The weight is 1.5 kg per m, that is, 150 kg, and the temperature of the roll is normal temperature (25 ° C.). The temperature of the roll is room temperature, but a voltage of 2 kv is applied between the roll and the electrode. By applying the voltage, the viscosity of the paste is reduced, and the barrier rib precursor is formed. After drying the solvent of the barrier rib precursor formed by such a method, 5
Firing at 00 ° C. for 10 minutes gives a substrate having barrier ribs. The shape of the barrier rib in the obtained substrate having the barrier rib has a height of 130 μm and an intermediate height of 80 μm.
μm.

The manufacturing method of the present invention described above is applicable not only to a substrate having barrier ribs used for a gas discharge display panel such as a plasma display panel but also to a precision barrier rib for various members such as an ink jet printer head and a member for optical communication. Applicable.

[0052]

According to the first method for manufacturing a substrate having barrier ribs according to the present invention, a paste comprising a mixture of a ceramic filler, a glass powder, a binder and an organic solvent is flowed down a predetermined amount onto a substrate to form a barrier rib. Applying pressure to the paste while rotating a cooled roll having grooves, coating the paste on the substrate and simultaneously forming a barrier rib precursor, and shaping the barrier rib precursor while cooling the paste. Therefore, the temperature of the formed barrier rib precursor is lowered, the viscosity becomes higher than before the molding, and it becomes difficult to flow.Therefore, the shape of the barrier rib precursor is maintained, the barrier rib is narrow, the height is high, and the barrier rib is excellent in shape accuracy. Is obtained.

The method of manufacturing a substrate having a second barrier rib according to the present invention is the same as the method of manufacturing a substrate having the first barrier rib described above, except that the roll temperature is set to be lower than the paste temperature by at least about 20 ° C. to cool the paste. The barrier rib precursor is formed while cooling with a roll having a temperature sufficiently lower than the paste temperature, so that the formed barrier rib precursor is cooled down before molding. Since the viscosity becomes higher and the flow becomes harder, the shape of the barrier rib precursor is maintained, and a substrate having a narrow width, a high height, and a barrier rib having excellent shape accuracy can be obtained.

According to the third method of manufacturing a substrate having barrier ribs according to the present invention, a predetermined amount of a paste composed of a mixture of a ceramic filler, glass powder, a binder and an organic solvent is placed on a substrate to form a barrier rib-shaped groove. Pressure is applied to the paste while rotating a roll heated to a temperature at which the paste flows, thereby coating the paste on the substrate and simultaneously forming the barrier rib precursor. Since the paste temperature is high, the paste reduces the viscosity, the width of the roll surface is narrow, and the roll can be inserted into a deep groove. can get.

According to the fourth method for manufacturing a substrate having barrier ribs according to the present invention, in the method for manufacturing a substrate having third barrier ribs described above, the roll temperature is raised by about 20 to 30 ° C. higher than the temperature of the paste installed on the substrate. Setting the barrier rib precursor while flowing the paste at the time of contact with the roll. Since the temperature of the roll is high at the time of molding, the paste has a reduced viscosity and the width of the roll surface is reduced. Thus, a substrate having a narrow, deep groove, a narrow width, a high height, and a barrier rib having excellent shape accuracy can be obtained.

According to a fifth method of manufacturing a substrate having barrier ribs according to the present invention, a predetermined amount of a paste composed of a mixture of a ceramic filler, a glass powder, a binder and an organic solvent is allowed to flow onto the substrate to form barrier rib-shaped grooves. Pressure is applied to the paste while rotating the roll having the barrier rib precursor formed at the same time as coating the paste on the substrate, and immediately after this, the solvent having low solubility in the binder and compatible with the organic solvent is used as the solvent. By spraying the barrier rib precursor, the solvent is sprayed on the barrier rib precursor to form a film on the barrier rib precursor surface, the shape of the barrier rib precursor is maintained, and the barrier rib with excellent precision is formed. Is obtained.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a substrate having a barrier rib, comprising a mixture of a ceramic filler, a glass powder, a binder and an organic solvent, the paste of a negative electrorheological fluid having a viscosity reduced by voltage application. Is placed on the substrate in a predetermined amount, pressure is applied to the paste while rotating a roll having a voltage having a barrier rib-shaped groove, and the paste is coated on the substrate while simultaneously forming a barrier rib precursor. When a voltage is applied to the paste by the roll, the paste reduces the viscosity, the width of the roll surface is narrow, and the paste can enter a deep groove, and a substrate having a barrier rib with excellent precision. Is obtained.

[Brief description of the drawings]

FIG. 1 is a schematic view showing each step of forming a barrier rib precursor in a method for manufacturing a substrate having barrier ribs according to Embodiment 1 of the present invention.

FIG. 2 is a schematic view of a roll having a circumferential groove according to the present invention.

FIG. 3 is a schematic view of a substrate having a formed barrier rib of the present invention.

FIG. 4 is a schematic diagram showing each step of molding a barrier rib precursor in a method for manufacturing a substrate having barrier ribs according to Embodiment 2 of the present invention.

FIG. 5 is a schematic view showing each step of forming a barrier rib precursor in a method for manufacturing a substrate having barrier ribs according to Embodiment 3 of the present invention.

FIG. 6 is a schematic view showing each step of molding a barrier rib precursor in a method for manufacturing a substrate having barrier ribs according to Embodiment 4 of the present invention.

FIG. 7 is a configuration diagram of a gas display panel.

[Explanation of symbols]

1 substrate, 2 paste, 3 barrier rib precursor, 4
Barrier ribs, 5 Substrate with barrier ribs, 10 Molding device, 11 Support, 12 Roll, 13 Circumferential groove, 1
4 cooling unit, 15 heating unit, 16 solvent spray unit, 17 nozzles, 18 electrodes, 19 power supply unit

Claims (6)

[Claims] 1. A predetermined amount of a paste composed of a mixture of a ceramic filler, a glass powder, a binder and an organic solvent is allowed to flow down onto a substrate, and pressure is applied to the paste while rotating a cooled roll having barrier rib-shaped grooves. In addition,
A method for manufacturing a substrate having barrier ribs, comprising coating the paste on the substrate and simultaneously forming a barrier rib precursor. 2. Roll temperature is approximately 20 ° C. lower than paste temperature.
2. The method for manufacturing a substrate having barrier ribs according to claim 1, wherein the barrier rib precursor is formed while setting the temperature to a low value and cooling the paste. 3. A roll having a predetermined amount of a paste composed of a mixture of a ceramic filler, a glass powder, a binder and an organic solvent placed on a substrate, having a barrier rib-shaped groove, and heated to a temperature at which the paste flows. Applying a pressure to the paste while rotating the substrate to coat the paste on the substrate and simultaneously form a barrier rib precursor. 4. The barrier rib precursor is formed while setting the roll temperature at about 20 to 30 ° C. higher than the temperature of the paste set on the substrate, and flowing the paste at the time of contact with the roll. 4. A method for manufacturing a substrate having the barrier rib according to 3. 5. A paste comprising a mixture of a ceramic filler, a glass powder, a binder and an organic solvent is flowed down a predetermined amount onto a substrate, and pressure is applied to the paste while rotating a roll having barrier rib-shaped grooves. At the same time as coating the paste on the substrate, a barrier rib precursor is formed, and immediately thereafter, a barrier rib having a low solubility in the binder and spray-coating the barrier rib precursor with a solvent compatible with the organic solvent is used. Of manufacturing a substrate having the same. 6. A predetermined amount of a paste of a negative electrorheological fluid, which is composed of a mixture of a ceramic filler, a glass powder, a binder and an organic solvent, and whose viscosity is reduced by applying a voltage, is placed on a substrate to form a barrier rib-shaped groove. A method for manufacturing a substrate having barrier ribs, comprising applying pressure to the paste while rotating a roll to which a voltage is applied, coating the paste on the substrate and simultaneously forming a barrier rib precursor.