JP2000185938A - Ceramic paste for forming ceramic capillary rib - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make ceramic capillary ribs simply and accurately formable through reduced process steps without wasteful use of raw materials. SOLUTION: The ceramic paste can form ceramic capillary ribs through the plastic deformation. The ceramic paste for forming the paste membrane comprises 30-95 wt.% of glass powder or glass and ceramic mixed powder, 0.3-15 wt.% of resin and 3-70 wt.% of a solvent. The solvent comprises a mixture of solvent, plasticizer, dispersing agent and defoaming agent. In a preferred embodiment, the resin is a self-curing resin, a thermosetting resin or a photo- setting resin. After the paste is coated, the foams are removed from the paste membrane by the defoaming agent, then the membrane is self-cured, thermally cured or photo-cured to a proper hardness. At this state, the blade 12 is thrust to the membrane and is allowed to move in a certain direction relatively to the paste membrane 11 to effect the plastic deformation of the membrane and the objective ceramic capillary ribs 13 are formed, thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a PDP (plasma d
isplay panel: plasma display panel), PAL
A ceramic paste for forming a ceramic capillary rib in a manufacturing process of an FPD (flat panel display) such as a C (plasma addressed liquid crystal display), a ceramic rib made from the capillary rib, and the ceramic rib are provided. It is about FPD.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, a ceramic rib is laminated on a glass substrate 1 many times by positioning a rib forming paste 2 containing glass powder in a predetermined pattern by a thick film printing method. It is coated, dried and fired, and is formed on the substrate 1 at a predetermined interval. The height H of the rib 8 is usually 100 to 300 μm, and the width W of the rib is usually 5
The width S of the cell 9 sandwiched between the ribs is usually about 100 to 300 μm.

[0003]

However, in the above-described conventional method of forming a ceramic rib by the thick film printing method, the width W of the rib is relatively narrow, about 50 to 100 μm, and the paste tends to drip after printing. The thickness of the single coating must be suppressed to about 10 to 20 μm after firing. As a result, in this method, the height H is 100 to 300.
In order to form a rib having a thickness of μm, it is necessary to repeatedly apply the thick film as many as 10 to 20 times, and H / W is obtained by dividing the height H of the rib after the upper coating by the width W of the rib. 1.5-
Since it is as large as about 4, there is a disadvantage that it is difficult to form ribs with high accuracy even when alignment is sufficiently performed during thick film printing. An object of the present invention is to provide a ceramic paste capable of forming a ceramic capillary rib simply and accurately with a small number of steps and no waste of material. It is another object of the present invention to provide a ceramic rib made from the capillary rib and an FPD having the ceramic rib.

[0004]

The invention according to claim 1 is
A ceramic paste capable of forming a ceramic capillary rib by plastic deformation, wherein 30 to 95% by weight of glass powder or glass / ceramic mixed powder, 0.3 to 15% by weight of resin, and 3 to 70% by weight of solvent. And a solvent is a mixture of a solvent, a plasticizer, a dispersant, and a defoaming agent. In the ceramic paste according to claim 1, the viscosity is 1000 to 5 by blending the paste as described above.
A paste of 000,000 cps can be obtained. If the resin in the paste is a self-curable resin, a thermosetting resin or a photocurable resin, by self-curing, thermosetting or photocuring the paste film after applying the paste,
The ceramic capillary rib formed on the substrate can be prevented from dripping and the ceramic capillary rib can be formed with high precision. The paste has a viscosity of 5,000 to 3
00,000 cps is preferred, and 10,000 to 10
000 cps is more preferred. By including the defoaming agent in the solvent, bubbles can be removed from the paste film before plastic deformation, and voids in the plastic material after plastic deformation and fine dents on the surface of the plastic material are eliminated.

As shown in FIG. 1, the invention according to claim 2 is the invention according to claim 1, wherein plastic deformation is performed by piercing a ceramic paste film 11 with a blade 12 having predetermined comb teeth 12b. 12 is a ceramic paste that is performed by moving the paste film 12 in a fixed direction relative to the paste film 11. In the ceramic paste according to the second aspect, the plastic deformation is performed by moving the blade 12 in a fixed direction relative to the paste film 11 with the comb teeth 12b piercing the paste film 11. That is, since the ceramic paste in the portion of the paste film 11 corresponding to the comb teeth 12b of the blade 12 moves or is swept away into the gap between the comb teeth 12b, the paste film 11 is deformed into the shape of the gap between the comb teeth 12b. The shape of the gap between the comb teeth 12b is maintained. As a result, the ceramic capillary rib 13 is formed on the surface of the substrate 10.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the resin is a self-curing resin that undergoes a polymerization reaction with a solvent and increases the viscosity of the paste with the passage of time. It is a ceramic paste containing a curable resin. Since the viscosity of the paste increases when left after application by including this self-curing resin, the viscosity of the paste before application can be reduced to improve coatability,
In addition, defoaming with a defoaming agent after application is easily performed.

The invention according to claim 5 is the invention according to claim 1 or 3, wherein the resin is a thermosetting resin or a photocurable resin, or a thermosetting resin or a photocurable resin is used. It is characterized by including. In the ceramic paste according to the fifth aspect, even without the self-curable resin according to the fourth aspect, by including a thermosetting resin in the resin,
When the paste film before the formation of the ceramic capillary rib after application is dried, the thermosetting resin functioning as a binder is cured, and the viscosity of the paste can be increased.
Similarly, by including a photo-curable resin in the resin, the above-described photo-curable resin functioning as a binder is cured by irradiating the paste film with ultraviolet rays for a predetermined time, thereby increasing the viscosity of the paste. Thereby, the viscosity of the paste before application can be reduced to improve coatability, and defoaming by the defoaming agent after application can be easily performed.

Further, a phenol resin is used as a thermosetting resin,
1 selected from the group consisting of urea resin, melamine resin, alkyd resin, silicone resin, furan resin, unsaturated polyester resin, epoxy resin and polyurethane resin
It is preferable to use one or more resins, and one or more resins selected from the group consisting of a benzophenone resin, a dibenzylketone resin, a diethylthioxanthone resin, an anthrone resin and a dibenzosuberone resin as the photocurable resin. Is preferred. In this specification, "ceramic capillary" means most of the resin and solvent after applying the ceramic paste containing the glass powder or the glass-ceramic mixed powder of the present invention, the resin, the solvent, the plasticizer and the dispersant. It means a state in which the plasticizer and the dispersant remain. "Ceramic green" refers to a state in which glass powder or glass-ceramic mixed powder, resin, plasticizer, and dispersant remain, and most of the solvent does not remain.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a ceramic paste rib 11 is formed by applying a ceramic paste on the surface of a substrate 10.
Is formed on the surface of the substrate 10 by piercing a comb tooth 12b formed on the blade 12 and moving the blade 12 or the substrate 10 in a certain direction while the edge 12a of the blade 12 is in contact with the surface of the substrate 10. The ceramic paste is a paste containing a glass powder or a glass-ceramic mixed powder, a resin as an organic binder, and a solvent (a solvent, a plasticizer, a dispersant, and a defoaming agent), and the glass powder is SiO ₂ , ZnO, PbO, or the like. And its softening point must be 300 ° C. to 600 ° C.

The glass / ceramic mixed powder is Si
A glass powder containing O ₂ , ZnO, PbO or the like as a main component;
It contains a ceramic powder such as alumina, cordierite, mullite, forsterite or the like which serves as a filler, and this ceramic powder makes the thermal expansion coefficient of the rib 13 formed equal to the thermal expansion coefficient of the glass substrate 10. Therefore, it is mixed to improve the strength of the fired ceramic rib. The content of the ceramic powder is preferably 60% by volume or less. When the content of the ceramic powder exceeds 60% by volume, the ribs become porous, which is not preferable. In addition, it is preferable that the particle diameters of the glass powder and the ceramic powder are each 0.1 to 30 μm. When the particle diameter of the glass powder and the ceramic powder is less than 0.1 μm, the glass powder and the ceramic powder are apt to agglomerate and the handling thereof becomes complicated. On the other hand, if the thickness exceeds 30 μm, a desired rib 13 cannot be formed when the blade 12 described later moves.

The ceramic paste contains 30 to 95% by weight of glass powder or glass-ceramic mixed powder, 0.3 to 15% by weight of resin, and 3 to 70% of solvent (solvent, plasticizer, dispersant and defoamer). % By weight. Also, 70 to 90% by weight of glass powder or glass / ceramic mixed powder, 0.5 to 3.5% by weight of resin, and 7 to 20% by weight of solvent (solvent, plasticizer, dispersant and defoamer) It is preferable to mix them. The reason why the glass powder or the glass-ceramic mixed powder is limited to the range of 30 to 95% by weight is as follows.
If the amount is less than 0% by weight, it becomes difficult to obtain a ceramic capillary rib having a predetermined shape using a blade,
This is because it is difficult to uniformly apply the paste to the substrate surface if the ratio exceeds the above range. 0.3 to 15% by weight of resin
If the amount is less than 0.3% by weight, it becomes difficult to obtain a ceramic capillary rib having a predetermined shape using a blade. If the amount exceeds 15% by weight, the paste is uniformly applied to the substrate surface. Is difficult, and there is a problem that the organic matter remains in the fired ceramic rib. Further, the solvent is limited to the range of 3 to 70% by weight because if it is less than 3% by weight, it becomes difficult to uniformly apply the paste on the substrate surface. This is because it becomes difficult to obtain a ceramic capillary rib having the shape of. By mixing the paste as described above, the viscosity becomes 1000 to 5
A paste of 000,000 cps can be obtained, and the ceramic capillary ribs 13 formed on the substrate can be prevented from dripping and the ceramic capillary ribs 13 can be formed with high accuracy.

The resin has a function as a binder, is easily decomposed by heat, and is a polymer having a high viscosity when dissolved in a solvent, and examples thereof include ethyl cellulose, acryl, and polyvinyl butyral. Further, the resin is preferably a self-curing resin that undergoes a polymerization reaction with a solvent and increases the viscosity of the paste over time, or contains a self-curing resin. Preferably, the resin is a thermosetting resin or a photocurable resin, or contains a thermosetting resin or a photocurable resin. The self-curing resin, the thermosetting resin, and the light-curing resin may be used alone or in combination of two or more. Examples of the combination of the self-curable resin and a solvent that undergoes a polymerization reaction therewith include a water-soluble epoxy resin and triethylenetetramine, PVA and formaldehyde, or a water-insoluble epoxy resin and xylenediamine. As the thermosetting resin, phenol resin, urea resin, melamine resin, alkyd resin, silicone resin, furan resin, unsaturated polyester resin,
One or more resins selected from the group consisting of an epoxy resin and a polyurethane resin are used, and a benzophenone resin, a dibenzyl ketone resin,
It is preferable to use one or more resins selected from the group consisting of a diethylthioxanthone resin, an anthrone resin and a dibenzosuberone resin.

As the solvent, alcohol-based, ether-based,
An organic solvent such as an aromatic solvent or water may be used. The organic solvent is preferably an alcohol or an ether. Preferred alcohols include triethylene glycol, α-terpineol, and the like. Preferred ethers include diethyl ether. Examples of the plasticizer include glycerin and dibutyl phthalate, and examples of the dispersant include benzene and sulfonic acid. The defoaming agent is also called an antifoaming agent. As the defoaming agent, silicone oil,
Sorbitan fatty acid esters, polyoxyalkylene alkyl ethers and the like can be mentioned. By configuring the ceramic paste in this manner, bubbles can be removed from the paste film after application, and a paste having a predetermined viscosity can be obtained, so that the ceramic capillary ribs 13 formed on the substrate 10 are dripped. By suppressing and firing, the ceramic ribs can be formed with high accuracy.

The application of the ceramic paste to the surface of the substrate 10 is performed by an existing means such as a roller coating method, a screen printing method, a dip method or a doctor blade method. After the paste film 11 is formed on the substrate 10, the defoaming agent acts in about one hour to release bubbles from the paste film 11. If the paste contains a self-curable resin, a thermosetting resin, or a photocurable resin, the paste film may be left standing, heated, or irradiated with ultraviolet rays before the blade 12 is stabbed with the paste film 11. In addition, since the viscosity of the paste increases, the viscosity of the paste before application can be reduced to improve coatability, and defoaming by the defoaming agent after application can be easily performed.

When the ceramic paste contains a self-curable resin and a solvent that undergoes a polymerization reaction with the self-curable resin, the viscosity of the resin becomes 10,
After applying a paste of 000 to 100,000 cps to form a paste film 11, the paste film 11 is left in the air at room temperature for 10 to 120 minutes. The polymerization reaction between the self-curing resin and the solvent allows the paste film to have a hardness suitable for forming the capillary rib even if the paste has a relatively low viscosity. When thermosetting resin is included in the ceramic paste, the viscosity is 10,000 to 100,000 c.
After applying a ps paste to form a paste film 11, this paste film 11
Dry for ~ 60 minutes. As a result, the thermosetting resin having a function as a binder is cured, so that the paste film has a hardness suitable for forming the capillary rib even if the paste has a relatively low viscosity. When the photo-curable resin is included in the ceramic paste, the viscosity is 10,000 to 100,000.
Immediately after the paste of 0 cps is applied to form the paste film 11, ultraviolet rays of a predetermined wavelength (for example, 256 nm) are irradiated for 0.5 to 10 minutes. At this time, since the photocurable resin having a function as a binder is cured, the paste film has a hardness suitable for forming the capillary rib even if the paste has a relatively low viscosity. After the paste film 11 has a predetermined hardness by the above-described self-curing, heat-curing or light-curing method, the paste film 11 is plastically deformed by a blade 12 to form a ceramic capillary rib 13. Since bubbles in the paste film are eliminated and the paste film has a predetermined hardness, a high-definition ceramic capillary rib 13 is formed by the blade 12 described below.

The substrate 10 on which the paste film 11 is formed
The blade 12 to be brought into contact with the surface has a plurality of comb teeth 12b.
Are formed at equal intervals and in the same direction. This blade 1
2 is made of metal, ceramic or plastic, etc. which does not react with the paste or be dissolved in the paste,
Particularly, from the viewpoints of dimensional accuracy and durability, ceramic or an alloy based on Fe, Ni, or Co is preferable. The gap between each comb tooth 12b is formed in accordance with the cross-sectional shape of the ceramic capillary rib 13 formed by the blade 12. As shown in FIGS. 3 and 4, the blade 12 in the present embodiment is formed of stainless steel having a thickness t of 0.1 mm, and the pitch P of the comb teeth 12b is 30.
0 μm, and the depth h of the gap between the comb teeth 12 b is 300
μm.

Here, the blade 12 has a thickness t of 0.0
When the pitch of the comb teeth 12b is P, the gap between the comb teeth 12b is w, and the depth of the gap is h, 0.03 mm ≦ h ≦ 1.0 mm and 1 mm or more and 3.0 mm or less. In a relationship of w / P ≦ 0.9, the pitch P of the comb teeth 12b is preferably 50 μm or more. The ceramic capillary rib 13 formed by the blade 12 satisfying these conditions is tightened by subsequent drying and firing, and a dense ceramic rib having a desired gap between the ribs can be obtained. Further, the shape of the gap between the comb teeth 12b is not limited to the case where the gap is formed as shown in FIG.
May be trapezoidal or inverted trapezoidal. If the shape of the gap between the comb teeth 12b is trapezoidal, it is possible to form the ceramic capillary rib 13 suitable for applications with a wide opening, and if the shape of the gap between the comb teeth 12b is inverted trapezoidal, the top of the rib can be formed. Can form the ceramic capillary rib 13 which is flattened in a wide area.

Returning to FIG. 1, the formation of the ceramic capillary ribs 13 by the blade 12 having such a structure is performed by piercing the comb teeth 12b of the blade 12 with the paste film 11 and bringing the edge 12a into contact with the surface of the substrate 10. Then, the substrate 10 is fixed and the blade 12 is moved in a certain direction as shown by a solid arrow in FIG.
Is fixed, and the paste film 11 is plastically deformed by moving the substrate 10 in a certain direction as shown by a broken line arrow in FIG. That is, the portion of the paste applied to the surface of the substrate 10 corresponding to the comb teeth 12b of the blade 12 is moved or swept into the gap between the comb teeth 12b, and only the paste located in the gap between the comb teeth 12b is moved. Remain on the substrate 10 to form the ceramic capillary rib 13 on the surface of the substrate 10. If the depth of the grooves of the comb teeth is larger than the thickness of the paste film 11, the blade 12
Alternatively, the paste swept when moving the glass substrate 10 enters the groove, and the ceramic capillary rib 13 having a height equal to or greater than the thickness of the paste film 11 can be formed. After forming the ceramic capillary ribs 13, the ceramic green ribs are formed by drying at 100 to 200 ° C. for 10 to 30 minutes in the air to form a ceramic green rib.
Heat at ~ 400 ° C for 30 minutes to 3 hours, and further in air
By firing at 0 to 580 ° C. for 10 to 30 minutes, the ceramic rib 14 shown in FIG. 2 is obtained. A ceramic rib is formed by drying and firing the ceramic capillary rib, and a PD (not shown) is formed using the ceramic rib.
An FPD such as P or PALC can be manufactured.

As shown in the enlarged circle of FIG. 2, the ceramic rib 14 formed on the substrate 10 as described above has a height H of the rib 14 and a height (１ ／) H. width W _C of the ribs 14 where, when the height (3/4) width W _M and the height of the ribs 14 where the H (9/10) the width of the rib 14 where the H W _T , H, W _C , W _M, and W _T , the variation represented by (maximum value−average value) / average value is 5% or less, and the aspect ratio represented by H / W _C is 1. It is preferably 5 to 10. When the aspect ratio is 1.5 to 10, an extremely fine ceramic rib 14 can be obtained.

FIGS. 5 and 6 show a second embodiment of the present invention. 5 and 6, the same reference numerals as those in FIGS. 1 and 2 indicate the same parts. In this embodiment, the comb teeth 12b of the blade 12 are pierced into the paste film 11 formed on the surface of the substrate 10 in the same manner as in the first embodiment, and the edge 12a of the blade 12 is moved from the surface of the substrate 10 to a predetermined position. By moving the blade 12 or the substrate 10 in a certain direction while the height is levitated, the paste film 11 is plastically deformed,
A ceramic capillary layer 22 is formed on the surface of the substrate 10, and a ceramic capillary rib 23 is formed on the ceramic capillary layer 22. The components of the paste and the method of applying the paste are configured in the same manner as in the first embodiment.

As shown in FIG. 5, the ceramic capillary rib 23 is formed by the blade 12 by fixing the substrate 10 with the edge 12a of the blade 12 floating at a predetermined height from the surface of the substrate 10 on which the paste film 11 is formed. This is performed by moving the blade 12 in a certain direction as shown by a solid arrow, or by moving the substrate 10 in a certain direction as shown by a broken arrow with the blade 12 fixed.
By this movement, the paste from the surface of the substrate 10 to a predetermined height remains on the surface of the substrate and remains on the ceramic capillary layer 2.
2, and the portion of the paste above the ceramic capillary layer 22 corresponding to the comb teeth 12b of the blade 12 is moved or swept into the gap between the comb teeth 12b, and only the paste located in the gap between the comb teeth 12b is removed. Ceramic capillary ribs 23 are formed on the ceramic capillary layer 22 while remaining on the ceramic capillary layer 22.

Next, an insulating layer 24 is formed on the substrate 10 shown in FIG. 5 from the ceramic capillary layer 22 and the ceramic capillary ribs 23 in the same manner as in the first embodiment. Ceramic rib 2
5 are formed. As shown in the enlarged circle of FIG. 6, the ceramic rib 25 formed on the insulating layer 24
H is the height of 5 and the rib 2 at the height (1/2) H
5 width of W _C, when the height (3/4) width W _M and the height of the ribs 25 where the H (9/10) the width of the rib 25 where the H W _T, H, 5% of variation represented by (maximum value−average value) / average value of W _C , W _M, and W _T
In the following, the aspect ratio represented by H / W _C is 1.
It is preferably 5 to 10. Aspect ratio 1.5
When the ratio is from 10 to 10, an extremely high-definition ceramic rib 25 can be obtained.

[0023]

Next, examples of the present invention will be described in detail together with comparative examples. <Example 1> having an average particle diameter of 1μm PbO-SiO ₂ -B ₂ O
80% by weight of the ₃ series glass powder and 20% by weight of alumina powder having an average particle size of 0.5 μm as a ceramic filler were prepared, and both were sufficiently mixed. This mixed powder, a self-curing resin / a water-soluble epoxy resin as a solvent / a mixed resin of triethylenetetramine and ethylcellulose,
A solvent and a solvent were blended at a weight ratio of 75/1/24 and sufficiently kneaded to obtain a ceramic paste. The solvent was prepared by mixing α-terpineol as a solvent, glycerin as a plasticizer, sulfonic acid as a dispersant, and silicone oil as a defoaming agent. In a state where a soda lime-based rectangular glass substrate 10 having a diagonal dimension of 40 inches and a thickness of 3 mm is fixed, the paste is applied to the glass substrate 10 by screen printing as shown in FIG. 3
A paste film 11 was formed by coating at a thickness of 00 μm.

On the other hand, the pitch P of the comb teeth 12b is 300 μm.
m, the gap w between the comb teeth 12b was 150 μm, the depth h was 300 μm, and the thickness t was 0.1 mm. The blade 12 made of stainless steel was prepared (FIGS. 3 and 4). After applying the paste and leaving it at room temperature for one hour in the air, the comb teeth 12b of the blade 12 are stabbed into the paste film with the glass substrate fixed, and the edge 12a is brought into contact with the glass substrate 10 By moving the blade 12 in a fixed direction in the direction indicated by the solid arrow in FIG.
A ceramic capillary rib 13 was formed on the zero surface.

Example 2 PbO having an average particle size of 0.5 μm
80 wt% of —SiO ₂ —B ₂ O ₃ -based glass powder and 20 wt% of alumina powder having an average particle diameter of 0.5 μm as a ceramic filler were prepared, and both were sufficiently mixed to prepare a mixed powder. . On the other hand, 80% by weight of a phenol resin (thermosetting resin) and 20% by weight of ethyl cellulose were prepared, and both were sufficiently mixed to prepare a mixed resin.
The mixed powder, the mixed resin and the solvent were mixed in a weight ratio of 80/3 /
The mixture was mixed at a ratio of 17 and sufficiently kneaded to obtain a ceramic paste. The solvent was prepared by mixing triethylene glycol as a solvent and sorbitan fatty acid ester as a defoaming agent. This paste was applied on the same glass substrate as in Example 1 in the same manner as in Example 1 to form a paste film.
After the paste film was left at 80 ° C. for 1 hour in the air, the paste film was stabbed and moved to plastically deform the paste film, thereby forming a ceramic capillary rib on the substrate surface.

Example 3 PbO-S having an average particle size of 3 μm
80% by weight of iO ₂ -B ₂ O ₃ -based glass powder and 20 particles of alumina powder having an average particle size of 1 μm as a ceramic filler.
% By weight, and both were sufficiently mixed. This mixed powder, a benzophenone resin (photocurable resin), and a solvent were mixed at a weight ratio of 90 / 0.5 / 9.5, and kneaded sufficiently to obtain a ceramic paste. The solvent was prepared by mixing α-terpineol as a solvent and polyoxyalkylene alkyl ether as a defoaming agent. This paste was applied on the same glass substrate as in Example 1 in the same manner as in Example 1 to form a paste film. After irradiating ultraviolet rays having a wavelength of 256 nm for one minute, the paste film was moved by sticking a blade, and the paste film was plastically deformed, thereby forming a ceramic capillary rib on the substrate surface.
Note that the process was performed in an atmosphere in which ultraviolet rays were blocked until a paste film was formed.

Comparative Example 1 As shown in FIG. 7, a rib forming paste 2 containing glass powder, an organic binder and a solvent and having a viscosity of 50,000 cps was screen-printed on a soda-lime glass substrate 1 by a screen printing method. And printing at 150 ° C. for 10 minutes was repeated 12 times to perform recoating. This overcoating was set so that the height H of the ceramic green rib 2 was 200 μm. As the rib forming paste, SiO ₂ ,
Glass powder mainly composed of ZnO and PbO and Al ₂ O ₃
And powder. Ethyl cellulose was used as the organic binder, and α-terpineol was used as the solvent. Thus, the ceramic green ribs 2 were formed at predetermined intervals (the width S of the cell 9). Next, the structure in which the ceramic green ribs 2 were formed on the substrate 1 was heat-treated at 550 ° C. for 1 hour in the air, thereby forming the ceramic ribs 8 having a height H of about 170 μm on the substrate 1.

<Comparative Test and Evaluation> Examples 1 and 2
The ceramic capillary rib 13 formed on the substrate 10 of the third embodiment is dried at 150 ° C. for 20 minutes in the air to remove the solvent, thereby forming a ceramic green rib (not shown). After heating at 60 ° C. for 60 minutes, it was fired at 550 ° C. in the air for 10 minutes to form a ceramic rib 14. Any one of the ceramic ribs 14 of Examples 1 to 3 obtained by firing in this manner.
The height H and the width were measured for 00 pieces and 100 arbitrary pieces of the ceramic ribs 8 obtained in Comparative Example 1 as follows. As shown in FIG. 2, the measurement of the width of 100 arbitrary ceramic ribs on the substrates of Examples 1 to 3 and Comparative Example 1 was based on the height (1/2) when the height of the ceramic rib was H. ) and the width W _C of the ribs of the place of H, height (3
/ 4) and the width W _M of the ribs of the place of H, height (9/10)
The measurement was performed by measuring the width W _T of the rib at H. Also after calculating the average value of these measured values, H, W _C, respectively (the maximum value or the minimum value - average value) of W _M and W _T were calculated variation represented by / average value. Table 1 shows the results of Examples 1 to 3 in comparison with the results of Comparative Example 1.

[0029]

[Table 1]

As is clear from Table 1, in Examples 1 to 3, as compared with Comparative Example 1, after the paste film was formed, the paste film was defoamed, and each of the self-curing, heat-curing, and light-curing functions was performed. Since the paste film had an appropriate hardness, it was found that ceramic ribs with small variations in height and width could be formed on the substrate.

[0031]

As described above, according to the present invention, a ceramic capillary rib is formed by plastically deforming a ceramic paste. Therefore, when a predetermined external force is applied to a paste having a predetermined viscosity, a desired paste can be obtained. Even when the ceramic capillary rib is deformed into a shape and the external force is removed, the ceramic paste does not return to its original shape, and the shape of the ceramic capillary rib is maintained after the deformation. Further, if the ceramic paste is configured to contain 30 to 95% by weight of glass powder or glass / ceramic mixed powder, 0.3 to 15% by weight of resin, and 3 to 70% by weight of solvent, a predetermined viscosity is obtained. Can be obtained, and dripping of the ceramic capillary rib can be suppressed. As a result, the ceramic capillary rib can be formed simply and accurately with a small number of steps without waste of material. In addition, when the plastic deformation is performed by moving the blade in a fixed direction relative to the paste film while the comb teeth are pierced in the paste film, the paste in the portion of the paste film corresponding to the comb teeth of the blade is formed. Since the paste film moves or is swept into the gap between the comb teeth, the paste film is deformed into the shape of the gap between the comb teeth, and is maintained in the shape of the gap between the comb teeth. As a result, the ceramic capillary rib can be formed simply and accurately with a small number of steps in the same manner as described above without waste of material.

If a self-curing resin is used as the above resin, the resin will polymerize and react with a solvent when left after application of the paste, so that the resin hardens. Can be. If the resin is configured to include a thermosetting resin, the thermosetting resin functioning as a binder is cured at the time of heating after application of the paste, so that the paste film can be appropriately moderated before contacting with a blade. Can be hard. Further, if the resin is configured to include a photocurable resin, the photocurable resin functioning as a binder is cured by irradiating the paste film after applying the paste with ultraviolet light for a predetermined time, so that the paste film Can be moderately hardened. As a result, when the paste film is swept by the blade, a ceramic capillary rib having a small width variation is formed. When the ceramic capillary rib of the present invention is dried and fired, a high-definition ceramic rib can be formed.
PD is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state of forming a ceramic capillary rib according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a ceramic rib obtained by drying, heating, and firing the ceramic capillary rib in the cross section along the line AA in FIG. 1;

FIG. 3 is a front view of the blade.

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a perspective view corresponding to FIG. 1 and showing a state of forming a rib with a ceramic capillary layer according to a second embodiment of the present invention.

6 is a cross-sectional view corresponding to FIG. 2 showing a ceramic rib with an insulating layer obtained by drying, heating, and firing the rib with a ceramic capillary layer in a cross section taken along line BB of FIG. 5;

FIG. 7 is a sectional view showing the formation of a conventional ceramic rib in the order of steps.

[Explanation of symbols]

 Reference Signs List 10 glass substrate 11 ceramic paste film 12 blade 12a edge 12b comb tooth 13,23 ceramic capillary rib 14,25 ceramic rib 22 ceramic capillary layer 24 insulating layer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshio Kanda 1-297 Kitabukurocho, Omiya-shi, Saitama Mitsubishi Materials Research Institute (72) Inventor Yoshiro Kuromitsu 1-297 Kitabukurocho, Omiya-shi, Saitama Mitsubishi Materials F-term in the Research Institute, Inc. (reference)

Claims (9)

[Claims] 1. A ceramic paste capable of forming ceramic capillary ribs by plastic deformation, wherein glass powder or glass / ceramic mixed powder is 30 to 9%.
5% by weight, 0.3 to 15% by weight of resin and 3 to 5% by weight of solvent
70% by weight, wherein the solvent is a mixture of a solvent, a plasticizer, a dispersant, and a defoaming agent, wherein the ceramic paste for forming a ceramic capillary rib is provided. 2. A blade (12) having predetermined comb teeth (12b) is stabbed into the ceramic paste film (11) by plastic deformation,
The ceramic paste according to claim 1, wherein the ceramic paste is performed by moving the blade (12) in a fixed direction relative to the paste film (11). 3. The ceramic paste according to claim 1, wherein the resin is a self-curing resin that undergoes a polymerization reaction with a solvent to increase the viscosity of the paste over time, or contains a self-curing resin. 4. The resin and the solvent are a water-soluble epoxy resin and triethylenetetramine, PVA and formaldehyde, or a water-insoluble epoxy resin and xylenediamine.
The described ceramic paste. 5. The ceramic paste according to claim 1, wherein the resin is a thermosetting resin or a photocurable resin, or contains a thermosetting resin or a photocurable resin. 6. The thermosetting resin is one or two selected from the group consisting of phenolic resins, urea resins, melamine resins, alkyd resins, silicone resins, furan resins, unsaturated polyester resins, epoxy resins and polyurethane resins. The ceramic paste according to claim 5, which is the above resin. 7. The photocurable resin is one or more resins selected from the group consisting of benzophenone resins, dibenzylketone resins, diethylthioxanthone resins, anthrone resins, and dibenzosuberone resins. Ceramic paste. 8. A ceramic rib formed by drying and firing a ceramic capillary rib formed using the ceramic paste according to claim 1. 9. A PDP having the ceramic rib according to claim 8.