JP2000185937A - 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: A blade 12 having prescribed comb teeth 12b is thrust into the ceramic paste membrane 11 and the blade 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 is formed thereby. The ceramic paste for forming the paste membrane comprises 3095 wt.% of glass powder or glass and ceramic mixed powder, 0.3-15 wt.% of resin and 3-70 wt.% of a solvent.

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
This is a ceramic paste capable of forming a ceramic capillary rib by plastic deformation. In the ceramic paste according to claim 1, when a predetermined external force is applied to a paste having a predetermined viscosity, the paste is deformed into a ceramic capillary rib having a desired shape, and the paste returns to its original state even when the external force is removed. Instead, the shape of the ceramic capillary rib is maintained after deformation.

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, the paste of the portion of the paste film 11 corresponding to the comb teeth 12b of the blade 12
Is moved or swept away, the paste film 11 is deformed into the shape of the gap between the comb teeth 12b, and is maintained in the shape of the gap between the comb teeth 12b. As a result, the substrate 1
A ceramic capillary rib 13 is formed on the zero surface.

The invention according to claim 3 is the invention according to claim 1 or 2, further comprising 30 to 95% by weight of glass powder or glass / ceramic mixed powder and 0.3 to 1% of resin.
It is characterized in that it contains 5% by weight and the solvent contains 3 to 70% by weight. In the ceramic paste according to the third aspect, a paste having a viscosity of 1000 to 500,000 cps can be obtained by blending the paste as described above, thereby suppressing dripping of the ceramic capillary rib formed on the substrate. To form a ceramic capillary rib with high precision. The paste has a viscosity of 5,000 to 50.
10,000 cps is preferred, and 10,000 to 300,
000 cps is more preferred.

The invention according to claim 4 is the invention according to claim 3, wherein the resin is a thermosetting resin or a photocurable resin, or contains a thermosetting resin or a photocurable resin. It is characterized by. In the ceramic paste according to the fourth aspect, if a thermosetting resin is included in the resin, the thermosetting resin functioning as a binder is hardened when the ceramic capillary rib is dried. Deformation can be prevented. If the resin includes a photocurable resin, the photocurable resin functioning as a binder is cured by irradiating the ceramic capillary rib with ultraviolet light for a predetermined time, so that the deformation of the ceramic capillary rib can be prevented.

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 (solvent, plasticizer, and dispersant).
₂ , with ZnO, PbO, etc. as main components and a softening point of 3
It is necessary that the temperature be between 00C and 600C.

The glass / ceramic mixed powder is Si
A glass powder containing O ₂ , ZnO, PbO or the like as a main component;
And a ceramic powder such as alumina, cordierite, mullite, and forsterite, which serves as a filler. The ceramic powder has a coefficient of thermal expansion of the ceramic rib when the formed capillary rib 13 is dried and fired. In order to make it equal to the coefficient of thermal expansion of 10,
And in order to improve the strength of the ceramic rib after firing. 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. When the thickness exceeds 30 μm, a blade 1 described later is used.
There is a problem that a desired rib 13 cannot be formed when the second member 2 is moved.

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% by weight of solvent (solvent, plasticizer and dispersant). Is preferred. In addition, glass powder or glass-ceramic mixed powder
It is more preferable to mix 90 to 90% by weight, 0.5 to 3.5% by weight of a resin, and 7 to 20% by weight of a solvent (solvent, plasticizer and dispersant). The reason that the glass powder or the glass-ceramic mixed powder is limited to the range of 30 to 95% by weight is that if it is less than 30% by weight, it becomes difficult to obtain a ceramic capillary rib having a predetermined shape using a blade.
If the content is more than the weight percentage, it becomes difficult to uniformly apply the paste to the substrate surface. 0.3 to 15 of resin
If the content is limited to the range of less than 0.3% by weight, it is difficult to obtain a ceramic capillary rib having a predetermined shape using a blade if the content is less than 0.3% by weight, and if it exceeds 15% by weight, the paste is uniformly applied to the substrate surface. This is because it is difficult to perform the heating, and there is a problem that the organic substance 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 100
A paste of 0 to 500,000 cps can be obtained, and the ceramic capillary rib 13 formed on the substrate can be obtained.
The sagging can be suppressed and the ceramic capillary rib 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. Preferably, the resin is a thermosetting resin or a photocurable resin, or contains a thermosetting resin or a photocurable resin. As the thermosetting resin, one or more resins 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 It is preferable that 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 are used as the photocurable resin.

The solvent is an organic solvent having relatively low volatility at room temperature or water. Examples of the organic solvent include α-terpineol, butyl carbitol acetate, and ether solvents. Examples of the plasticizer include glycerin and dibutyl phthalate, and examples of the dispersant include benzene and sulfonic acid. By configuring the ceramic paste in this manner, a paste having a predetermined viscosity can be obtained, and the ceramic ribs 13 formed on the substrate 10 are suppressed and dripped to form ceramic ribs with high precision. be able to.

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, it is desirable to leave the paste film 3 to 6 hours to increase the viscosity of the paste film to a predetermined viscosity. A plurality of comb teeth 12b are formed at equal intervals and in the same direction on the blade 12 that comes into contact with the surface of the substrate 10 on which the paste film 11 is formed. The blade 12 is made of a metal, ceramic, plastic, or the like that does not react with the ceramic paste or is dissolved in the ceramic paste. In particular, from the viewpoint of dimensional accuracy and durability, ceramic or an alloy based on Fe, Ni, or Co is used. 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 0.5 mm, the pitch P of the comb teeth 12 b is 500 μm, and the comb teeth 12 b
Is formed to have a depth h of 500 μm.

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 ceramic capillary rib 13 is formed by the blade 12 having the above-described configuration, and the comb teeth 12b of the blade 12 are pierced into the paste film 11, and the edge 12a is brought 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. The ceramic capillary rib is dried and fired to form a ceramic rib, and an FPD such as a PDP (not shown) or a PALC (not shown) can be manufactured using the ceramic rib.

Next, a method for manufacturing a ceramic rib from the ceramic capillary rib 13 will be described. When the ceramic capillary rib 13 is formed from the paste film 11 containing a thermosetting resin,
By drying at 10 ° C. for 10 to 30 minutes, a ceramic green rib (not shown) is obtained. At this time, since the thermosetting resin having a function as a binder is cured, the deformation of the ceramic green rib is prevented. After drying, the ceramic ribs 14 are heated in the air at 300 to 400 ° C. for 30 minutes to 3 hours to remove the binder, and then fired in the air at 520 to 580 ° C. for 10 to 30 minutes to form the ceramic ribs 14 shown in FIG.

When a ceramic capillary rib 13 is formed from a paste film 11 containing a photocurable resin, a paste is applied to a substrate 10 to form a paste film 11, and the paste film 11 is plastically deformed by a blade 12 to form a ceramic film. The steps up to the formation of the capillary rib 13 are performed in an atmosphere in which ultraviolet rays are blocked. After the formation of the ceramic capillary rib 13, a predetermined wavelength (for example, 2
(56 nm) for 1 to 10 minutes. At this time, the photocurable resin having a function as a binder is cured, so that the deformation of the ceramic green rib is prevented. Thereafter, the ceramic ribs are dried in the same manner as described above to form ceramic green ribs, heated in the same manner as described above to remove the binder, and further fired in the same manner as described above to obtain the ceramic ribs 14 shown in FIG.

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 2 to 2. It is preferably 10. When the aspect ratio is 2 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, a comb tooth 12b formed on at least a part of the periphery of the blade 12 is pierced into the ceramic paste film 11 formed by applying the ceramic paste on the surface of the substrate 10, and the edge 12a of the blade 12 is pierced. The blade 12 or the substrate 10 is moved in a predetermined direction while floating the paste film 11 from the surface of the substrate 10 at a predetermined height to plastically deform the paste film 11, so that the ceramic capillary layer 22 and the ceramic capillary layer 22 The ceramic capillary rib 23 is formed on the substrate. 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, a method for manufacturing a ceramic rib from the ceramic capillary layer 22 and the ceramic capillary rib 23 will be described. When the ceramic capillary layer 22 and the ceramic capillary rib 23 are formed from the paste film 11 containing a thermosetting resin, the ceramic capillary layer 22 and the ceramic capillary rib 23 are dried in air at 100 to 200 ° C. for 10 to 30 minutes to form a ceramic green. Layers and ceramic green ribs (not shown). At this time, since the thermosetting resin having a function as a binder is cured, the deformation of the ceramic green layer and the ceramic green rib is prevented. After drying, 300 ~ in air to remove the binder
Heat at 400 ° C for 30 minutes to 3 hours.
By baking at 580 ° C. for 10-30 minutes, FIG.
Are formed on the insulating layer 24 and the ceramic rib 25 formed on the insulating layer 24.

When a ceramic capillary layer 22 and a ceramic capillary rib 23 are formed from a paste film 11 containing a photocurable resin, a paste is applied on a substrate 10 to form a paste film 11, and the paste film 11 is The steps from plastic deformation to the formation of the ceramic capillary layer 22 and the ceramic capillary rib 23 are performed in an atmosphere in which ultraviolet rays are blocked. After the formation of the ceramic capillary layer 22 and the ceramic capillary rib 23, ultraviolet rays having a predetermined wavelength (for example, 256 nm) are irradiated for 1 to 10 minutes. At this time, the photocurable resin having a function as a binder is cured, so that the deformation of the ceramic green layer and the ceramic green rib is prevented. Thereafter, drying is performed in the air in the same manner as above to form a ceramic green layer and a ceramic green rib, and heating is performed in the air to remove the binder in the same manner as described above, and further firing is performed in the air in the same manner as described above. The insulating layer 24 is formed on the substrate 10 shown in the figure, and the ceramic rib 25 is formed on the insulating layer 24.

As shown in the enlarged circle of FIG. 6, the height of the rib 25 is H, and the height of the rib 25 is (（) H. width W _C of, 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, W _C, each of W _M and W _T (maximum value - average value) / variance represented by the average value is not more than 5%, the aspect ratio expressed by H / W _C is 2-10
It is preferred that When the aspect ratio is 2 to 10, an extremely fine ceramic rib 25 can be obtained.

[0025]

Next, examples of the present invention will be described in detail together with comparative examples. <Example 1> having an average particle size of 2μm 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 phenol resin (thermosetting resin), and ethylene glycol diethyl ether were blended at a weight ratio of 80 / 0.8 / 19.2, and sufficiently kneaded to obtain a ceramic paste. 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 onto the glass substrate 10 by a roller coating method as shown in FIG. 500μm thick
To form a paste film 11.

On the other hand, the pitch P of the comb teeth 12b is 500 μm.
m, the gap w between the comb teeth 12b was 100 μm, the depth h was 500 μm, and the thickness t was 0.5 mm. A blade 12 made of stainless steel was prepared (FIGS. 3 and 4). With the glass substrate fixed, this blade 12
The comb teeth 12b are pierced into the paste film, and the edge 1
The ceramic capillary rib 13 is formed on the surface of the substrate 10 by moving the blade 12 in a certain direction in the direction indicated by the solid line arrow in FIG. did.

Example 2 PbO-S having an average particle size of 1 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 to prepare a mixed powder. On the other hand, 80% by weight of ethyl cellulose and 20% by weight of an epoxy resin (thermosetting resin) were prepared, and both were sufficiently mixed to prepare a mixed resin. The above mixed powder, mixed resin and α-terpineol (solvent) are mixed in a weight ratio of 7
The mixture was mixed at a ratio of 0/10/20 and sufficiently kneaded to obtain a ceramic paste. This paste is applied on the same glass substrate as in Example 1 in the same manner as in Example 1 to form a paste film, and the paste film is moved by sticking with a blade, and the paste film is plastically deformed. Was formed with ceramic capillary ribs.

<Embodiment 3> Instead of α-terpineol,
A ceramic capillary rib was formed on the substrate surface in the same manner as in Example 2 except that the same amount of water was used.

Example 4 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 ethylene glycol diethyl ether (solvent) were mixed at a weight ratio of 90 /
It was blended at a ratio of 0.5 / 9.5 and kneaded well to obtain a ceramic paste. This paste is applied on the same glass substrate as in Example 1 in the same manner as in Example 1 to form a paste film, and the paste film is moved by sticking with a blade, and the paste film is plastically deformed. Was formed with ceramic capillary ribs. The above steps were performed in an atmosphere in which ultraviolet rays were blocked.

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 ps 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 , Z
A glass powder mainly composed of nO and PbO and an Al ₂ O ₃ powder are included. 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, 2 and 3
Ceramic capillary rib 13 formed on the substrate 10
Was dried in air at 150 ° C. for 20 minutes to remove the solvent, thereby forming a ceramic green rib (not shown).
After heating at 350 ° C. for 60 minutes to remove the binder, the ceramic ribs were fired at 550 ° C. for 10 minutes in the atmosphere. The ceramic capillary rib 13 in Example 4 was irradiated with ultraviolet light having a wavelength of 256 nm for 1 minute, and then dried in air at 150 ° C. for 20 minutes to remove the solvent, thereby forming a ceramic green rib. After heating at 350 ° C. for 60 minutes, 55
The resultant was fired at 0 ° C. for 20 minutes to obtain a ceramic rib. The ceramic ribs 1 of Examples 1 to 3 obtained by firing in this manner
4 and the arbitrary 100 ceramic ribs 8 obtained in Comparative Example 1, the height H
And the width were measured as follows.

As shown in FIG. 2, the width of 100 arbitrary ceramic ribs on the substrates of Examples 1 to 4 and Comparative Example 1 was measured by measuring the height (H) of the ceramic ribs. 1/2) rib width W _C of at the H, the height (3 /
4) The width W _M of the rib at H and the height (9/10) H
The measurement was carried out by measuring the width W _T of the rib at the point (1). After calculating the average of these measurements,
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. Tables 1 and 2 show the results of Examples 1 to 4 in comparison with the results of Comparative Example 1.

[0033]

[Table 1]

[0034]

[Table 2]

As is clear from Tables 1 and 2, the results of Examples 1 to 4 indicate that ceramic capillary ribs can be effectively formed on a substrate by using the ceramic paste of the present invention. In Examples 1 to 3, the ceramic ribs can be obtained by drying the ceramic capillary ribs, heating them for binder removal, and subsequently firing them. After forming the ceramic capillary ribs, it was found that the ceramic ribs can be obtained by irradiating ultraviolet rays only for a predetermined time, and further drying and firing.
It has been found that ceramic ribs can be easily obtained with less steps and less waste than in Comparative Example 1. Furthermore,
Since the aspect ratio of the ceramic rib obtained by drying, heating and firing, or by irradiating, drying and firing the ceramic capillary rib is 2 to 10, an extremely accurate ceramic rib can be obtained by the present invention. It turned out that.

[0036]

As described above, according to the present invention, the ceramic paste is plastically deformed to form the ceramic capillary rib. Therefore, when a predetermined external force is applied to the ceramic paste having a predetermined viscosity, the ceramic paste is formed. Even if the ceramic capillary rib is deformed into a desired shape and the external force is removed, the paste does not return to its original shape, and the ceramic capillary rib is maintained in the deformed shape. As a result, the ceramic capillary rib can be formed simply and accurately with a small number of steps without waste of material. Also, when 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 ceramic paste film, the paste in the portion of the paste film corresponding to the comb teeth of the blade can be obtained. 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.

Further, if the ceramic paste is constituted so as 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 paste having a predetermined viscosity can be obtained, and the ceramic capillary rib can be formed with high precision by suppressing dripping of the ceramic capillary rib. Further, if the resin includes a thermosetting resin, the thermosetting resin functioning as a binder is cured when the ceramic capillary rib is dried, so that deformation of the dried ceramic green rib can be prevented. Further, if the resin is configured to include a photo-curable resin, the photo-curable resin functioning as a binder is cured by irradiating the ceramic capillary ribs with ultraviolet light for a predetermined time, thereby preventing deformation of the ceramic capillary rib. it can. If the ceramic capillary rib of the present invention is dried and fired, a high-definition ceramic rib can be formed, and if this ceramic rib is used for an FPD, a high-quality FPD can be 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

Continued on the front page (72) Inventor Hiroki Hirata 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Inside Mitsubishi Materials Corporation Research Laboratory (72) Inventor Seiji Toyoda 1-297 Kitabukurocho, Omiya City, Saitama Prefecture Mitsubishi Materials Corporation In the laboratory (72) Inventor Yoshio Kanda 1-297 Kitabukuro-cho, Omiya-shi, Saitama Mitsubishi Materials Corporation Research Laboratory F-term (reference) 2H089 HA36 QA12 QA13 4G062 AA08 AA09 AA15 BB04 MM07 MM12 PP03 PP05 PP13 PP14 5C040 GF02 GF18GF19 JA02 JA11 JA20 KA09 KA11 KA15 KA16 KB02 KB03 KB11 KB19 KB28 LA17 MA24 MA26

Claims (8)

[Claims] 1. A ceramic paste capable of forming a ceramic capillary rib by plastic deformation. 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 glass powder or the glass-ceramic mixed powder is 30 to 95% by weight, and the resin is 0.3 to 15% by weight.
The ceramic paste according to claim 1, wherein the solvent contains 3 to 70% by weight. 4. The ceramic paste according to claim 3, wherein the resin is a thermosetting resin or a photocurable resin, or contains a thermosetting resin or a photocurable resin. 5. The thermosetting resin is one or two selected from the group consisting of phenol 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 4, which is the above resin. 6. 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. 7. A ceramic rib obtained by drying and firing a ceramic capillary rib formed using the ceramic paste according to claim 1. 8. An FPD having the ceramic rib according to claim 7.