JP2004354433A - Method of manufacturing panel substrate on color filter side for liquid crystal display device, panel substrate on color filter side for liquid crystal display device, and color filter printer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a panel substrate on the color filter side for a liquid crystal display device by which a spacer part is inexpensively and certainly arranged on a counter substrate and smoothness of e.g. +0.2-(-0.2) μm is attained for a surface of the counter substrate except for the spacer part, the panel substrate on the color filter side for the liquid crystal display device and a color filter printer. <P>SOLUTION: The method for manufacturing the panel substrate on the color filter side for the liquid crystal display device comprising the counter substrate with the color filter and the spacer part formed thereon, characterized by forming the spacer part by pressing at least a part of a color filter material, is provided. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a color filter side panel substrate for a liquid crystal display device having a spacer portion for adjusting the thickness of a liquid crystal in a liquid crystal display device, and a color filter printing device used for the manufacture.
[0002]
[Prior art]
The structure of the liquid crystal panel is a structure in which liquid crystal is sealed between two panel substrates provided with required functions such as an electrode wiring, a thin film transistor, and a color filter. The spacer is for keeping the thickness of the liquid crystal layer constant. The display characteristics of the liquid crystal are as follows: The driving mode of the liquid crystal is any of a twisted nematic (TN) mode, a super twisted nematic (STN) mode, a lateral electric field (IPS) mode, a vertical alignment (VA) mode, an optical compensation bend (OCB) mode, and the like. Also greatly depends on the thickness of the liquid crystal layer. Therefore, a method for precisely controlling the thickness of the liquid crystal layer is required, and for example, an accuracy of ± 0.2 μm is required. Therefore, not only the spacer but also the surface in contact with the liquid crystal layer is required to have the same degree of flatness. For example, when the color filter has a structure in contact with the liquid crystal layer, similar accuracy is required for the flatness of the surface of the color filter. In addition, there is a configuration in which an overcoat layer or a transparent conductive film is provided on the color filter. In this case, the surface of the overcoat layer or the surface of the transparent conductive angle is required to have the same planar accuracy.
[0003]
A conventionally widely used spacer is a glass or plastic spherical body (bead ball) having a diameter of 3 to 10 μm as shown in Patent Document 1. Before assembling the panel, a spherical body (bead ball) of a predetermined size is scattered on one panel substrate, and then combined with the other panel substrate and sealed with one peripheral portion left or sealed. A liquid crystal panel is assembled by a method in which a hole is made in one place after the stop, liquid crystal is injected from that part, and then completely sealed.
[0004]
[Patent Document 1]
JP-A-9-160051
[0005]
As an example of a schematic cross-sectional view of a liquid crystal panel using a bead ball as a spacer, a thin-film transistor (TFT) type active matrix type is represented by a cross-sectional view of a transverse electric field type and a cross-sectional view of a twisted nematic type. It is shown in FIG.
[0006]
In FIGS. 14 and 15, a panel substrate on which a color filter is formed is often referred to as a counter substrate with respect to a panel substrate on which a thin film transistor is formed. In FIG. 15, an electrode formed on a counter substrate is often called a counter electrode.
[0007]
The problem with the method of using bead balls for the spacers 13 is that, first, it is difficult to make the distribution of the bead ball spacers in the panel uniform or to distribute them to predetermined portions without excess or deficiency. The larger the size of the liquid crystal panel, the longer the injection time of the liquid crystal becomes, which is a bottleneck in production. Further, if a bead ball is present in a pixel, the display quality is adversely affected.
[0008]
Therefore, a method of forming a photoresist pattern of a predetermined shape using a photoresist and using the photoresist pattern as a spacer has been partially put to practical use. Patent Documents 2 and 3 are shown as typical examples.
[0009]
[Patent Document 2]
JP-A-11-337984
[0010]
[Patent Document 3]
JP 2001-125113 A
[0011]
In this case, the photoresist spacer 12 is included in what is called a post spacer due to its shape, but its planar shape is, for example, about 12 ± 2.0 μm in diameter and 2.5 to 4.0 ± 0.2 μm in height. is there. Usually, it is formed after attaching the counter electrode. The advantage of using a photoresist spacer formed in this way is that instead of injecting liquid crystal through holes, it is applied to one counter substrate before assembly, and then the other counter substrate is overlaid. Can greatly improve productivity.
[0012]
The advantage of this method is that the thickness of the liquid crystal layer = the thickness of the photoresist spacer formed by the photoresist can be controlled quite strictly, and the arrangement can be strictly specified. Since it is provided on a black matrix, there is no adverse effect on display quality.
[0013]
However, in order to strictly control the gap of the liquid crystal, it is necessary not only to strictly control the thickness of the photoresist spacer, but also that the surface in contact with the liquid crystal be strictly smooth. For example, in a structure where a color filter is exposed, the surface thereof is required to have a high degree of smoothness of the same level or less.
[0014]
For this reason, also in a color filter side panel substrate for a liquid crystal display device which is a panel substrate on which a color filter is formed, a smoothing (flattening) layer is formed on the color filter, Pressing and polishing are performed.
[0015]
FIG. 16 shows a manufacturing process of a color filter side panel substrate for a liquid crystal display device having an active matrix structure of a thin film transistor (TFT) in which a counter electrode is provided on the color filter side in this case. FIG. 12 shows a conventional twisted nematic type (TN type) in a schematic cross section of a completed type liquid crystal panel, and FIG. 13 shows a lateral electric field type (hereinafter referred to as an IPS type).
[0016]
First, a counter substrate having a black matrix formed on a glass substrate is prepared (a). From above, a pigment dispersion resist 28 of a first color (for example, R) is applied to the entire surface (b), exposed through a photomask 29 (c), and developed to form a color filter of a first color. An R color portion 7R is formed (d). Similarly, the color filter 7 is formed by applying the second color (for example, G) and the third color (for example, B) by pigment resist application, exposure, and development (e). At that time, the color layer is made to slightly overlap with the black stripe or the black matrix. By providing an overcoat layer 10 thereon, the surface is smoothed (f), a counter electrode 16 made of ITO is provided (g), and then a photosensitive resin is applied, exposed and developed as necessary to form a photo. The resist spacer 12 was formed on a black stripe or a black matrix (h). Finally, an alignment film was formed.
[0017]
However, the method using this photolithography was expensive.
[0018]
Therefore, a printing method is being studied as a method of manufacturing a color filter for cost reduction.
[0019]
However, when formed by a printing method, the cross-sectional shape of the color filter often becomes skewed, and therefore, the smoothness of the surface of the color filter may be insufficient. In addition, the overlapping portion is generally thicker than the other portions even if the printing method is not used.
[0020]
When the smoothness of the surface of the color filter is insufficient as described above, pressing, polishing, or forming an overcoat layer before solidifying the color filter as in Patent Documents 4, 5, and 6 can be performed. And a step of smoothing the surface.
[0021]
[Patent Document 4]
Japanese Patent No. 261492
[0022]
[Patent Document 5]
JP-A-6-939
[0023]
[Patent Document 6]
JP-A-6-34808
[0024]
[Patent Document 7]
JP 2000-28824 A
[0025]
[Problems to be solved by the invention]
The production of a color filter side panel substrate for a liquid crystal display device having a spacer for adjusting the thickness of the liquid crystal in the liquid crystal panel can be achieved inexpensively and reliably by forming a spacer portion together with a color filter, an overcoat layer, or both on a counter substrate. In addition, there is a demand for a manufacturing method capable of achieving a high-performance smoothness of, for example, about ± 0.2 μm or less on the surface other than the spacer if possible, and a color filter printing apparatus used for the manufacturing.
[0026]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a method of manufacturing a color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate. It is intended to provide a method for manufacturing a color filter side panel substrate for a liquid crystal display device, wherein a spacer portion is formed by pressing.
[0027]
According to a fifth aspect of the present invention, there is provided a color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate, at least a part of the color filter material is pressed. The present invention provides a color filter-side panel substrate for a liquid crystal display device, wherein a spacer portion is formed.
[0028]
This makes it possible to reduce the number of steps by simultaneously performing the step of smoothing the surface of the color filter and the step of forming the spacer portion, and eliminates the need to use a photosensitive material for the spacer. Is also cheaper.
[0029]
According to a second aspect of the present invention, there is provided a method for manufacturing a color filter side panel substrate for a liquid crystal display device in which a color filter, a spacer portion and an overcoat layer are provided on a counter substrate. A method of manufacturing a color filter side panel substrate for a liquid crystal display device, characterized in that a part of the substrate is pressed to form a spacer portion.
[0030]
According to a sixth aspect of the present invention, there is provided a color filter-side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate, at least a part of the overcoat material is pressed. The present invention provides a color filter-side panel substrate for a liquid crystal display device, wherein a spacer portion is formed.
[0031]
This makes it possible to reduce the number of steps by simultaneously performing the step of forming the overcoat layer and the step of forming the spacer portion, and eliminates the need to use a photosensitive material for the spacer, thereby reducing the material cost. It is cheaper.
[0032]
According to a third aspect of the present invention, the method for providing a color filter material is a printing method, and the press for forming the spacer portion also serves to flatten the color filter portion. A method for manufacturing a color filter side panel substrate for a liquid crystal display device according to claim 1 is provided.
[0033]
According to a seventh aspect of the present invention, the color filter material is provided by a printing method, and the color filter portion is flattened by a press forming the spacer portion. 6. A color filter-side panel substrate for a liquid crystal display device according to claim 5, wherein:
[0034]
This makes it possible to use the overlapping of the ink with the adjacent pixels in the color filter by the conventional printing method and the rise of the ink in the peripheral portion due to the rise of the blacks matrix or the black stripe as a spacer portion, which is efficient. It is a simple manufacturing process.
[0035]
According to a fourth aspect of the present invention, there is provided a color filter for a liquid crystal display device according to the second aspect, wherein the press forming the spacer portion also serves to flatten an overcoat layer. A method for manufacturing a side panel substrate is provided.
[0036]
According to an eighth aspect of the present invention, there is provided the liquid crystal display device according to the sixth aspect, wherein the overcoat layer is flattened by a press for forming the spacer portion. A color filter-side panel substrate is provided.
[0037]
According to a ninth aspect of the present invention, there is provided a color filter printing apparatus comprising a press die having a concave portion in a spacer portion and a press mechanism.
[0038]
This makes it possible to provide a color filter and a spacer portion on the opposing substrate as an integrated process, thereby simplifying the working process.
[0039]
According to a tenth aspect of the present invention, there is provided a color filter printing apparatus having a printing mechanism and a press mechanism overcoat material application mechanism.
[0040]
This makes it possible to provide the color filter and the spacer portion on the opposing substrate as an integrated process including the process of forming the overcoat layer, thereby simplifying the working process.
[0041]
BEST MODE FOR CARRYING OUT THE INVENTION
In a method for manufacturing a color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate, at least a part of the color filter material is pressed to form a spacer portion. According to the method for manufacturing a color filter side panel substrate for a liquid crystal display device, at least a part of the color filter material is pressed on the color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate. And a color filter-side panel substrate for a liquid crystal display device characterized by having a spacer portion formed thereon.
[0042]
There are various types of opposing substrates depending on the structure of the liquid crystal display device.Even if the opposing substrate includes one or several types of a black matrix, a black stripe, an opposing electrode, a polarizing plate, an alignment film, a TFT, etc. It may be possible to consider or omit attaching these structures later with a glass plate.
[0043]
The color filters may be of three colors such as RGB and YMC, or of four colors including black for matrix and stripes. The color filter in the present invention may be provided by a photolithography method using a photosensitive resin, but since the pressing step also serves as a smoothing step, the effect is great when provided by a printing method.
[0044]
It should be noted that the position where the color filter material is provided before the pressing is, after all, pressed afterward, so that it is not necessary to perform fine positioning. Therefore, it is only necessary that most of the alignment provided in the frame is not performed so as to cover the entire surface of the pixel within the frame separated by the black stripe. In addition, generally, unless it is provided at a position protruding to an adjacent pixel after pressing, even if it is slightly hung in a black stripe or a black matrix, alignment to a pixel is generally performed. It does not matter if it is determined. In short, if the color filter material is provided at a position where the color filter material does not come out after the press up to the pixel adjacent to the pixel where the color filter is provided after the press, it may be determined that the color filter material is almost matched.
[0045]
The color filter-side panel substrate for a liquid crystal display device may be one in which a color filter and a spacer portion are provided on the above-described counter substrate, or one in which an overcoat layer is provided on the color filter. Further, in order to manufacture a liquid crystal display device using the color filter side panel substrate for the liquid crystal display device, before that, an alignment film, a counter electrode, a scanning electrode, a polarizing plate, etc. are applied to any surface as post-processing, Naturally, the surface may be subjected to orientation processing.
[0046]
There are various types of color filter ink as a color filter material when a color filter is provided in a printing process. The solvent-free type hardly shrinks in volume even when cured. In the case of this type of ink, it is necessary to press in a state where the viscosity is high enough not to deform after removing the press die, or to cure during the press. If a photocurable ink is used as the ink, it is possible to adjust the amount of light before exposure and to expose the ink to obtain a curing degree suitable for the press. Then, after the press, the film is further exposed to light and is completely cured, so that the color filter material becomes a color filter.
[0047]
A similar method is possible even if a thermosetting ink is used, but it takes a long time to cure, so it is preferable to cure at a different place instead of at a printing machine or a press machine. Further, a photo-curable and thermo-curable ink can also be used. For example, the ink can be designed such that the ink is light-cured before pressing to obtain a viscosity suitable for the press, and the color filter material is heat-cured after pressing so that the hardness or the like satisfies the specifications as a color filter.
[0048]
On the other hand, when the solvent containing the solvent evaporates, the volume of the color filter material decreases. In general, the thickness is reduced without changing the width because it is attached to the glass substrate. The degree may be reduced by, for example, about 40%. In such a case, even after the solvent is evaporated by changing the composition or physical properties of the ink, the ink is deformed by pressing. In other words, the volume is not reduced thereafter, but it can be press-deformed and can be cured so that the required performance as a color filter can be satisfied thereafter.
[0049]
For example, a composition capable of being cured by ultraviolet light or heat is used. Alternatively, a mixture of a high-boiling solvent and a low-boiling solvent is used, and when the low-boiling solvent evaporates and the high-boiling solvent does not evaporate, press deformation is possible, but volume shrinkage is small. There is also a way to make it quieter. There is also a method in which the material is heated to be flexible at the time of pressing to enable press deformation.
[0050]
Note that the same can be said for the overcoat material since the volume decreases when the solvent in the overcoat material evaporates. In particular, in the case of the overcoat material, it is often preferable to use a material obtained by removing the pigment component from the color filter material as the overcoat material.
[0051]
When a thermosetting ink or a curing agent-added ink is used, it takes a long time to cure, and during that time, it may not be possible to remove the press mold. In that case, a flat press die is used and left in a stacked state until it is cured. In this case, it is preferable to use the above-described flat press mold.
[0052]
In addition, even if there is a reduction in thickness after pressing, if the degree of the reduction can be accurately controlled, the shape of the pressing mold should not be limited to simply having only the spacer portion as the concave portion, but to the color on the black matrix. The shape of the portion for pressing the filter and the shape of the portion for pressing the other original color filter portions may be changed. That is, a press die having the cross-sectional view shown in FIG. 10 may be used. When this mold is used, as shown in FIG. 11, a color filter material is generally provided in accordance with the color filter (a), pressed (b), and dried to reduce the volume (thickness) (c). ), It is not necessary to press-deform after the volume (thickness) has been reduced.
[0053]
When an overcoat layer is required on the color filter, the overcoat layer can be formed on one surface after forming the spacer in this manner. If the thickness (height) of the part where the spacer is located is the same as that of the other parts, the thickness of the spacer to be formed first should be as specified, and if different, anticipate the degree of the difference. There is a method of changing the thickness (height) of the spacer. In this case, the color filter can be selected relatively freely, and the present invention can be applied even if provided by a method such as a photolithography method.
[0054]
Also, in the case of this method, the thickness of the overcoat layer near the spacer may deviate from a predetermined value. However, since the spacer portion is provided on the black matrix, the display quality is not reduced.
[0055]
As another problem, in a normal TN type liquid crystal display, an ITO layer is formed on a color filter. In this method, an ITO film is formed last. In this case, an ITO film may be formed on the top of the spacer. Depending on the cross-sectional shape of the spacer, an ITO film may be formed on the side surface. If the ITO film formed on the top or side surface has an adverse effect, it must be prevented from being formed or removed. However, as a disadvantageous effect, when a problem occurs in the insulating property of the opposing substrate, there is a method of providing an insulating layer on a required portion of the opposing substrate or on the spacer.
[0056]
As a method of preventing the ITO from being formed in the inconvenient portion, for example, there is a method of making the cross-sectional shape of the spacer larger at the upper portion than at the lower portion (substrate side), or at least making the same shape. Since the ITO is formed on the upper surface but not on the side surface, the problem of short circuit between the upper and lower substrates is avoided.
[0057]
As a removing method, for example, there is a method using a lift-off method. That is, first, a positive photoresist is applied to the entire surface before forming the ITO film, and the positive photoresist is left only in a portion where the ITO is to be removed using a photolithography. In this state, an ITO film is formed. Next, the entire surface is exposed to make the remaining positive resist soluble in a developing solution, and when the positive resist is removed by the developing solution, ITO on the resist is also removed. Further, it can be removed by a usual photolithography method. That is, after the ITO film is formed, an etching resist film is formed only at a place where ITO is required by a photolithographic method, and the exposed ITO film is removed with an etching solution. The etching resist film is dissolved in a solvent or stripped with a stripping solution. There is also a method in which a soluble film is formed on the upper surface of the spacer by a printing method or the like, and after forming the ITO, the soluble film is removed and the ITO is removed at the same time.
[0058]
Note that the color filter material before pressing must be provided at least on the pixel, but unlike the conventional color filter that separately forms a spacer portion, the blacks matrix or black stripe has an effect of raising the height, and the color filter material is adjacent to the black matrix. The swelling due to the overlap of the pixel with the color filter is not a problem because it becomes a spacer portion. Conversely, it may be preferable to provide more color filter material in a slightly elevated or overlapping manner than conventional color filters, as needed to build up the spacers, but the amount of spacers is small, In some cases, it is sufficient to calculate the same as in the past. Similarly, the plane position of the color filter material before pressing needs to be provided at least on the pixel, but since the color filter material on the boundary on the black matrix or black stripe serves as a spacer, fine alignment is performed. There is no problem if you do not.
[0059]
The color filter at this time does not have the above-mentioned photosensitivity or thermosetting property and does not contain a solvent, and may be any material as long as it can be formed by pressing.
[0060]
As for the pressing process, it is necessary to perform at least pressure and temperature conditions so that the spacer part is provided by the press and the surface becomes smooth, but this changes depending on the conditions such as color filter material and overcoat material. Therefore, it may be adjusted appropriately according to the material.
[0061]
For the press die, a material with little deformation or a material with little influence of deformation is selected to ensure accuracy. For example, various materials such as a silicone rubber lined with a metal plate can be employed. The plate may be a flat plate if it is small, but is preferably a roll in view of defoaming. When the press die is a flat plate, the method is not limited to the method of sequentially pressing from the end so that air bubbles do not remain inside, and there is also a method of winding a lithographic plate around a roll or the like to form.
[0062]
In this case, the cross-sectional shape of the concave portion is preferably an inverted trapezoid in which the opening is wider than the bottom surface from the viewpoint of ease of the pressing process. However, if a press die having rubber elasticity is used, it may be slightly trapezoidal. The depth is determined in consideration of the thickness of the liquid crystal layer plus the thickness finally contributing to the thickness by the post-processing of both panel boards, and the thickness reduction already described above.
[0063]
In order to improve the molding effect of the press, it is effective to cure the color filter material and the like in the pressed state, but a sufficient molding effect can be obtained without such a contrivance, and the molding can be removed from the press mold as it is. Such an ingenuity is not required if it is a thing.
[0064]
As a curing method, various curing methods such as ultraviolet curing, heat curing, and electron beam curing can be selected depending on conditions.
[0065]
Various methods can be selected for the method of removing from the press die, but in order to maintain the molded shape, when the press die is a flat plate shape, it is preferable to sequentially perform from the end.
[0066]
Further, the printing machine provided with the color filter material may be screen printing, planographic offset printing, or the like, but in order to maintain the accuracy of the height of the spacer portion, intaglio offset printing with high quantitativeness is preferable.
[0067]
【Example】
First, a press mold was prepared as follows.
[0068]
A photoresist (Microposit # 1400 manufactured by Shipleysha) was spin-coated on the glass substrate to form a film having a dry thickness of 4 μm. Exposure and development were performed using a photomask having all the necessary spacer patterns to obtain a matrix having spacer protrusions. A silicone rubber (TES3508 manufactured by Toshiba Silicone Co., Ltd.) to which a predetermined amount of a curing agent has been added is applied to the matrix, and a mirror-polished metal plate (42 alloy: iron-nickel alloy) having a thickness of 0.3 mm A polypropylene film having a thickness of 50 μm was laminated thereon, and a primer coated with a predetermined plastic primer was placed thereon so that no air bubbles could enter between them. Spacers were placed around the perimeter to maintain gap spacing, and the metal plate was taut. The thickness of the spacer was 2 mm. The size of the metal plate was such that all of the required spacers could be accommodated and the surrounding area could have a margin of 200 mm. This is to make the press die large enough to be roll-pressed using this.
[0069]
After the silicone rubber was cured, when the metal plate was lifted from the end, the layer of silicone rubber 21 was adhered to the metal plate 22 and peeled off the glass substrate. A depression corresponding to the protrusion of the resist was formed on the surface of the silicone rubber, and the press mold 20 was completed.
[0070]
Further, the press die 20 was wound around a press die setting roll 23 attached to printing as follows. The roll for setting the press die has the same basic structure as the blanket roll of the offset printing press, and a plate-shaped roll can be wound around the roll. That is, there is a cutout portion, and a plate-shaped object can be fastened and fixed there.
[0071]
Blankets were fixed on both sides in the pressing direction of the prepared press die. Next, the blanket was fixed by a tightening fixing portion in a cutout portion of the roll. A method for adjusting the pattern of the spacer portion of the press die so as to be at a predetermined position of the liquid crystal color filter will be described below.
[0072]
The color ink, which is the color filter material 8, is put into the spacer portion (recess) of the press die 20, and is rolled on the opposing substrate 3 placed at the position to be pressed. Then, the color filter material 8 is transferred to the facing substrate 3. That is the position where the desired spacer portion 6 is formed. The position of the XY-θ platen for fixing the opposing substrate 3 is moved (not shown) so that the position is a desired position.
[0073]
Next, a spacer portion was formed by pressing the color filter material as follows. (Explanation based on FIG. 1)
FIG. 1A shows a counter substrate on which a color filter material is formed by a printing method. The method for forming the color filter material is, for example, a method described in Patent Documents 4 and 6.
[0074]
That is, R, G, and B patterns of a color filter material are formed on the glass substrate 4 on which the black matrix 9 is formed by a printing method, and are pressed and smoothed. In FIG. 1a, the surface of the color filter material is not smooth, and the area where the black matrix is located is high. This is because after the smoothing, the solvent in the color filter ink, which is the color filter material, evaporates, resulting in formation. Shape. By devising the composition of the ink, the ink is so flexible that it can be pressed even after the solvent has evaporated. This state was pressed as shown in FIGS. 1b to c. As shown in FIGS. 7 and 8, the roll pressure was set to 5 kg / cm and the speed was set to 300 mm / sec by using a roll press machine in which the roll press mold 20 prepared by the above method was set.
[0075]
After pressing, the solvent of the color filter material 8 was volatilized, and then cured by an ultraviolet lamp 27 as shown in FIG. In this step, when the color filter material is a heat-curable type, the color filter material is heat-cured under the thermosetting conditions. The color filter 7 and the spacer portion 6 were formed to obtain the panel plate 2 for the color liquid crystal display device 1. The shape of the spacer portion 6 was substantially the same as the shape of the photoresist initially formed as a matrix of the spacer portion. Here, “substantially” means that the function of the spacer portion is the same as that of the conventional spacer.
[0076]
If a color filter ink that does not contain a solvent is used as the color filter material, the smoothing and the formation of the spacer portion can be performed simultaneously by using this roll press in the smoothing step after printing. it can.
[0077]
FIG. 4 is a schematic sectional view of a completed liquid crystal display device in the case of a thin film transistor (TFT) type active matrix type, FIG. 4 is a diagram of a conventional lower ITO type, and FIG. 5 is a diagram of an upper ITO type. FIG. 6 shows an electric field type diagram.
[0078]
FIG. 3 shows an example in which an overcoat layer 10 and a spacer portion 6 are provided using an overcoat material 11 on a color filter formed by a normal photolithography method using a similar pressing method. As an example of the overcoat layer in this case, for example, the one disclosed in Patent Document 7 can be used. After coating and evaporating the solvent, it is pressed to form a spacer portion and to smooth the overcoat layer.
[0079]
In general, since the overcoat layer needs to have a uniform thickness, the application method is limited, but according to the method of the present invention, the overcoat layer is smoothed by pressing. Therefore, a coating apparatus or a coating method with a slightly lower thickness accuracy may be used.
[0080]
According to the present invention, the surface other than the completed spacer portion has a smoothness of ± 0.2 μm or less, and the height of the spacer portion is within the specification value ± 0.2 μm.
[0081]
【The invention's effect】
According to the present invention, a color filter side panel substrate for a liquid crystal display device using a color filter material or an overcoat material as a spacer can be provided. Further, the manufacture of a color filter side panel substrate for a liquid crystal display device having a spacer portion for adjusting the thickness of the liquid crystal in the liquid crystal display device, the color filter on the counter substrate, the overcoat layer, or a spacer portion together with both, A manufacturing method and a color filter printing apparatus used in the manufacturing method, which can be provided inexpensively and reliably and can achieve high-performance smoothness of, for example, about ± 0.2 μm or less on the surface other than the spacer portion, can be provided.
[Brief description of the drawings]
FIG. 1 is a conceptual cross-sectional view showing a manufacturing process of a color filter side panel substrate for a liquid crystal display device obtained by the present invention.
FIG. 2 is a conceptual sectional view showing a color filter side panel substrate for a liquid crystal display device obtained by the present invention.
3 is a conceptual sectional view showing a color filter side panel substrate for a liquid crystal display device obtained by the present invention, which is different from the example of FIG.
FIG. 4 is a conceptual sectional view showing a color liquid crystal display device using a color filter side panel substrate for a liquid crystal display device obtained by the present invention.
FIG. 5 is a conceptual sectional view showing a color liquid crystal display device using a color filter side panel substrate for a liquid crystal display device obtained by the present invention, which is different from the example of FIG.
FIG. 6 is a conceptual cross-sectional view showing a color liquid crystal display device using a color filter side panel substrate for a liquid crystal display device obtained by the present invention, which is different from the examples of FIGS.
FIG. 7 is a conceptual cross-sectional view showing a manufacturing process of a color filter side panel substrate for a liquid crystal display device obtained by the present invention when the press die is in a roll shape.
8 is a conceptual cross-sectional view showing a case where the cross-sectional direction in the manufacturing process of FIG. 7 is changed.
FIG. 9 is a conceptual sectional view showing a manufacturing process of a color filter side panel substrate for a liquid crystal display device obtained by the present invention when integrated with a printing process.
FIG. 10 is a conceptual cross-sectional view in the case where the press die has a shape that takes into account the volume reduction of the color filter material.
11 is a conceptual cross-sectional view showing a manufacturing process of a color filter side panel substrate for a liquid crystal display device when the press die of FIG. 10 is used.
FIG. 12 is a conceptual sectional view showing a conventional color liquid crystal display device using a color filter side panel substrate for a liquid crystal display device.
FIG. 13 is a conceptual sectional view showing a color liquid crystal display device using a conventional color filter side panel substrate for a liquid crystal display device different from the example of FIG.
FIG. 14 is a conceptual sectional view showing a color liquid crystal display device using a conventional color filter side panel substrate for a liquid crystal display device, which is different from the examples of FIGS. 12 and 13.
FIG. 15 is a conceptual sectional view showing a color liquid crystal display device using a conventional color filter side panel substrate for a liquid crystal display device different from the examples of FIGS. 12, 13 and 14;
FIG. 16 is a conceptual cross-sectional view showing a manufacturing process of a conventional color filter side panel substrate for a liquid crystal display device.
[Explanation of symbols]
1 ... color liquid crystal display
2 ・ ・ ・ Panel substrate
3 ... Counter substrate
4 ... glass substrate
5 ... liquid crystal
6 ・ ・ ・ Spacer part
7 ... color filter
7R: R color part of color filter
7G: G color part of color filter
7B: B color portion of the color filter
8 ··· Color filter material
8R: R color part of color filter material
8G: G color part of color filter material
8B: B color part of color filter material
9 ··· Black matrix
10 ... overcoat layer
11 ... overcoat material
12 Photoresist spacer
13 ... spacer
14 ・ ・ ・ Orientation film
15 ・ ・ ・ Polarizing plate
16 ··· Counter electrode
17 ... pixel electrode
18 ... thin film transistor
19 ... scanning electrode
20 ・ ・ ・ Press mold
21 ・ ・ ・ Silicon rubber
22 ... metal plate
23 ・ ・ ・ Roll for press type installation
24 ・ ・ ・ Inking roll
25 ・ ・ ・ Waterless version
25R ・ ・ ・ R color waterless version
25G ・ ・ ・ G color waterless version
25B ... B color waterless version
26 ... Blanket
27 ··· UV lamp
28 ... Pigment dispersed resist
29 Photomask
30 ... insulating layer
31 ··· Protective film

Claims (10)

In a method for manufacturing a color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate, at least a part of the color filter material is pressed to form a spacer portion. A method for manufacturing a color filter side panel substrate for a liquid crystal display device. In the method for manufacturing a color filter side panel substrate for a liquid crystal display device in which a color filter, a spacer portion, and an overcoat layer are provided on a counter substrate, at least a part of the overcoat material is pressed to form a spacer portion. A method for manufacturing a color filter side panel substrate for a liquid crystal display device, characterized by comprising the following: 2. The color filter for a liquid crystal display device according to claim 1, wherein the method of providing the color filter material is a printing method, and the press forming the spacer portion also serves to flatten the color filter portion. Manufacturing method of side panel substrate. 3. The method of manufacturing a color filter side panel substrate for a liquid crystal display device according to claim 2, wherein the press forming the spacer portion also serves to flatten the overcoat layer. In a color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate, at least a part of the color filter material is pressed to form a spacer portion. Color filter side panel substrate for liquid crystal display device. In a color filter side panel substrate for a liquid crystal display device in which a color filter and a spacer portion are provided on a counter substrate, at least a part of an overcoat material is pressed to form a spacer portion. Color filter side panel substrate for liquid crystal display device. 6. The liquid crystal display device according to claim 5, wherein the color filter material is provided by a printing method, and the color filter portion is flattened by a press forming the spacer portion. Color filter side panel substrate. 7. The color filter-side panel substrate for a liquid crystal display device according to claim 6, wherein the overcoat layer is flattened by a press forming the spacer portion. A color filter printing apparatus, comprising: a press die having a concave portion in a spacer portion; and a press mechanism. A color filter printing apparatus having a printing mechanism and a press mechanism overcoat material application mechanism.

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