JP2003315528A - Substrate integrated with color filter and method for manufacturing the same and display element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a substrate integrated with a color filter by which a color filter with high dimensional accuracy and a smooth surface is transferred to a substrate without generating defective transfer, the substrate integrated with the color filter and a display element using the same. <P>SOLUTION: The substrate 2 integrated with the color filter is manufactured by forming an electrode 20 for electrodeposition on a surface 10a of a rigid body auxiliary substrate 10 with smooth surfaces, forming an electrodeposition resin layer 30 containing a color filter 31, a black resin layer 32 and a transparent resin layer 33 on the surface of the electrode 20 for electrodeposition with an electrodeposition method, forming a resin substrate 150 by forming an unhardened resin layer 153 on the surface of the electrodeposition resin layer 30 and subsequently hardening it and releasing the electrodeposition resin layer 30 and the resin substrate 150 from the electrode 20 for electrodeposition at the interface between the electrode 20 for electrodeposition and the electrodeposition resin layer 30. The substrate 2 integrated with the color filter thus manufactured is provided with the color filter with the high dimensional accuracy and the smooth surface. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display element and an organic electroluminescent (Electroluminescent; Abbreviation: E) used for a mobile phone, an electronic notebook, a personal digital assistant, a notebook personal computer and the like.
The present invention relates to a display element such as an L) element, a color filter integrated substrate used therefor, and a method for manufacturing the same.

[0002]

2. Description of the Related Art In display elements such as liquid crystal display elements and organic EL elements, which are widely used in mobile phones, electronic notebooks, personal digital assistants, notebook type personal computers, etc., in the visible light region represented by a glass substrate. A transparent substrate is used. In particular, in a display element used in a mobile phone, an electronic notebook, a mobile information terminal, or the like, a resin substrate such as a plastic substrate or a film substrate is used instead of a glass substrate for the purpose of thinning and lightweighting. In addition to the display of character information, display devices are required to display image information, especially color images, in accordance with the development of information equipment. As a display device capable of displaying a color image, a micro color filter type color liquid crystal display device in which a micro color filter (hereinafter, also simply referred to as “color filter”) is formed on a substrate surface is widely produced. .

As a method for forming a color filter on the surface of a substrate, a printing method, an electrodeposition method, a transfer method and the like have been proposed. Although these color filter forming methods are effective when using a glass substrate, a resin substrate is used because heat treatment for fixing the color filter to the substrate and a plurality of aqueous cleanings are required in the process. In this case, there are the following problems. The resin substrate has a linear expansion coefficient larger than that of an inorganic substance such as glass and expands hygroscopically. Therefore, the size repeats expansion and contraction according to temperature and humidity, and the size changes. The expansion and contraction are factors that reduce the dimensional stability inherent in the resin, reduce the dimensional accuracy when forming the color filter, and make it difficult to accurately form the color filter on the resin substrate. When the dimensional accuracy of the color filter is reduced, the positional accuracy of the color filter and the driving electrode is reduced when the display element is formed, and the color reproducibility is significantly reduced.

As a prior art for accurately forming a color filter on a resin substrate, a method of forming a color filter on a rigid substrate having a small linear expansion coefficient and transferring it to the resin substrate is disclosed in Japanese Patent Laid-Open No. 2000-180619 and JP 2
No. 000-121823.

In the technique disclosed in Japanese Patent Laid-Open No. 2000-180619, a glass substrate is used as a rigid substrate, a peeling layer made of polyimide is provided on the rigid substrate, and a color filter is formed on the peeling layer. After the resin substrate is bonded via the photocurable resin and the photocurable resin is photocured and adhered, at the interface between the release layer and the rigid substrate, the release layer, the color filter and the resin substrate are separated from the rigid substrate. By peeling off, the color filter formed on the rigid substrate is transferred to the resin substrate. By using a photocurable resin as the adhesive, it is possible to suppress thermal strain when the color filter formed on the rigid substrate is transferred to the resin substrate.

Further, in the technique disclosed in Japanese Patent Laid-Open No. 2000-121823, polyvinyl alcohol (abbreviation: PVA) having a saponification degree of 99 is formed on a rigid substrate.
Provided with a release layer made of a water-soluble polymer, a color filter is formed on the release layer, and a resin substrate is attached to the formed color filter with an adhesive, and then a color filter is formed. By peeling the color filter and the resin substrate from the release layer at the interface with the release layer, the color filter formed on the rigid substrate is transferred to the resin substrate.

[0007]

However, the above-mentioned prior art has a problem when the electrodeposition method is used for forming the color filter. That is, when an electrodeposition electrode is provided between the rigid substrate and the release layer or the release layer and a color filter is formed by using the electrodeposition method, a polymer such as polyimide or PVA that forms the release layer or the release layer. Since the material is insulative, the electrodeposition accuracy of the color filter is poor, and a color filter having excellent positional accuracy and resolution cannot be obtained.

Further, the above-mentioned Japanese Patent Laid-Open No. 2000-180619.
In the technology disclosed in the publication, since the wettability between the polyimide used for the release layer and the photocurable resin for adhesion is not good, it is formed on the exposed portion of the polyimide, that is, on the release layer made of polyimide. 5 of color filters
The photo-curable resin for bonding does not easily flow into the gap of about 10 μm. As a result, defects such as bubbles and pinholes are likely to occur in the gaps between the color filters.

An object of the present invention is to provide a method of manufacturing a color filter integrated substrate and a color filter integrated substrate, which can transfer a color filter having high dimensional accuracy and a smooth surface to a substrate without causing transfer failure. And to provide a display device using the same.

[0010]

The present invention provides a step of forming an electrodeposition electrode on one surface of a first substrate, and a color filter, a black resin and a transparent resin on the surface of the electrodeposition electrode. A step of forming a resin layer containing by an electrodeposition method,
Bonding a second substrate to the resin layer via an adhesive, and peeling the resin layer and the second substrate from the electrodeposition electrode at the interface between the electrodeposition electrode and the resin layer. And a method of manufacturing a color filter integrated substrate.

According to the present invention, the color filter-integrated substrate has a step of forming an electrodeposition electrode on one surface of the first substrate, and a color filter, a black resin, and a black resin on the surface of the electrodeposition electrode. A step of forming a resin layer containing a transparent resin by an electrodeposition method, a step of adhering a second substrate to the resin layer via an adhesive, and an interface between the electrodeposition electrode and the resin layer, It is manufactured through a step of separating the resin layer and the second substrate from the electrodeposition electrode. The surface of the electrodeposition electrode thus formed on one surface of the first substrate has the same surface roughness as the one surface of the first substrate because the thickness of the electrodeposition electrode is thin. . Since the resin layer including the color filter, the black resin and the transparent resin is formed on the surface of the electrodeposition electrode, at the interface between the electrodeposition electrode and the resin layer, from the electrodeposition electrode to the resin layer and The surface of the resin layer exposed by peeling off the two substrates is the surface roughness of the surface of the electrodeposition electrode, that is, the same surface roughness as one surface of the first substrate is transferred. Further, the resin layer,
Since the color filter, the black resin, and the transparent resin are included, when the resin layer and the second substrate are peeled from the electrodeposition electrode and the resin layer at the interface between the electrodeposition electrode and the resin layer, the resin layer forms the electrode layer. It does not remain on the surface of the wearing electrode. That is, the resin layer formed on the first substrate can be transferred to the second substrate without causing transfer failure. Therefore, a color filter integrated substrate having a color filter with high dimensional accuracy and a smooth surface can be manufactured by a simple means of using a substrate having a smooth surface as the first substrate.

The present invention also provides a step of forming an electrodeposition electrode on one surface of the first substrate, and an electrodeposition layer including a color filter, a black resin and a transparent resin on the surface of the electrodeposition electrode. A step of forming by a bonding method, a step of forming an uncured resin layer on the surface of the resin layer, and a step of curing the uncured resin layer to form a second substrate,
And a step of peeling the resin layer and the second substrate from the electrodeposition electrode at the interface between the electrodeposition electrode and the resin layer.

According to the present invention, the color filter-integrated substrate has a step of forming an electrodeposition electrode on one surface of the first substrate, and a color filter, a black resin, and a black resin on the surface of the electrodeposition electrode. A step of forming a resin layer containing a transparent resin by an electrodeposition method, a step of forming an uncured resin layer on the surface of the resin layer, and a step of curing the uncured resin layer to form a second substrate. And a step of peeling the resin layer and the second substrate from the electrodeposition electrode at the interface between the electrodeposition electrode and the resin layer.
The surface of the electrodeposition electrode thus formed on one surface of the first substrate has the same surface roughness as the one surface of the first substrate because the thickness of the electrodeposition electrode is thin. . Since the resin layer including the color filter, the black resin and the transparent resin is formed on the surface of the electrodeposition electrode, at the interface between the electrodeposition electrode and the resin layer, from the electrodeposition electrode to the resin layer and The surface of the resin layer exposed by peeling off the two substrates is the surface roughness of the surface of the electrodeposition electrode, that is, the same surface roughness as one surface of the first substrate is transferred. Further, the resin layer,
Since the color filter, the black resin, and the transparent resin are included, when the resin layer and the second substrate are peeled from the electrodeposition electrode and the resin layer at the interface between the electrodeposition electrode and the resin layer, the resin layer or the second layer is removed. The resin layer forming the two substrates does not remain on the surface of the electrodeposition electrode. That is, the resin layer formed on the first substrate can be transferred to the second substrate without causing transfer failure. Further, since the second substrate is formed by curing the uncured resin layer formed on the surface of the resin layer, the resin layer and the second substrate should be interposed with an adhesive. Without being strongly bonded, they are integrated. Therefore, by a simple means of using a substrate having a smooth surface as the first substrate, a color filter integrated substrate having a color filter having high dimensional accuracy and a smooth surface and having a strong adhesive force between the substrate and the color filter is provided. Can be manufactured.

The present invention is also a color filter integrated substrate manufactured by using the method for manufacturing a color filter integrated substrate.

According to the present invention, the color filter integrated substrate is manufactured by using the method for manufacturing the color filter integrated substrate. This makes it possible to obtain a color filter integrated substrate having a color filter with high dimensional accuracy and a smooth surface.

The present invention is also a display device including the color filter integrated substrate.

According to the present invention, the display element includes the color filter integrated type substrate having the color filter having the high dimensional accuracy and the smooth surface as described above. Therefore, the color filter integrated type substrate and the color filter integrated type are provided. The thickness of the layer formed between the counter substrate provided so as to face the substrate is uniform with little difference between the pixels and in the pixels. Therefore, a display element having excellent display uniformity can be obtained.

[0018]

1 (a) is a plan view showing a simplified structure of a color filter integrated substrate 1 according to a first embodiment of the present invention, and FIG. Figure 1 (a)
The section line I-I ′ of the color filter integrated substrate 1 shown in FIG.
3 is a cross-sectional view showing a cross-sectional structure in FIG.

In the color filter integrated type substrate 1, an electrodeposition resin layer 30 is formed on a resin substrate 50 with an adhesive layer 40 interposed therebetween. The electrodeposition resin layer 30 is red (abbreviation: R)
A color filter 31R, a green (abbreviation: G) color filter 31G, and a blue (blue; abbreviation: B) color filter 31B including a color filter 31 including three color filters, and a black resin obtained by electrodeposition of a black resin. Layer 32
And a transparent resin layer 33 formed by electrodeposition of a transparent resin, and an alignment mark 34 formed by electrodeposition of a resin provided in the transparent resin layer 33 independently of the periphery of the color filter 31 and containing a coloring agent such as a pigment. Including and

The black resin layer 32 has a function of a black mask for increasing the sharpness of each color, and surrounds each pixel, that is, the red color filter 31R, the green color filter 31G and the blue color filter of the color filter 31. It is provided so as to surround the periphery of 31B. As the black resin forming the black resin layer 32, for example, a resin containing a black colorant such as carbon black can be used.

The transparent resin layer 33 includes a color filter 31,
The black resin layer 31 and the alignment mark 34 are provided up to the end of the color filter integrated substrate 1 so as to surround the periphery thereof. By providing the transparent resin layer 33 around the color filter 31, the black resin layer 31, and the alignment mark 34, the color filter 31, the black resin layer 3
2 and the step between the portion where the alignment mark 34 is present and the portion where the alignment mark 34 is not present can be eliminated. As the transparent resin forming the transparent resin layer 33, for example, an acrylic resin can be used.

A method of manufacturing the color filter-integrated substrate 1 thus constructed will be described. 2 to 4 are cross-sectional views schematically showing the state of each step in manufacturing the color filter integrated substrate 1.

FIG. 2 is a view showing a state in which the electrodeposition electrode 20 and the electrodeposition resin layer 30 are formed on the rigid auxiliary substrate 10. First, the electrodeposition electrode 20 is formed by depositing a conductive electrode material on one surface 10a of the rigid auxiliary substrate 10 which is the first substrate.

As the rigid body auxiliary substrate 10, for example, a glass plate, a ceramic plate or a metal plate can be used. The rigid body auxiliary substrate 10 is preferably made of a material having a small linear expansion coefficient. The surface of the rigid body auxiliary substrate 10 is
It is preferable that the surface is a smooth surface having a surface roughness polished to such an extent that it can be used for an optical element (hereinafter, polishing performed to obtain such surface roughness is referred to as optical polishing).

As a conductive electrode material forming the electrodeposition electrode 20, for example, indium-tin alloy oxide (Indium) is used.
-Tin Oxide; abbreviation: ITO), tin oxide (chemical formula: Sn)
O ₂ ), metallic materials such as nickel, chromium, tungsten or tantalum, or a mixture or alloy thereof can be used. The electrodeposition electrode 20 is an ITO film formed by depositing these conductive electrode materials by, for example, a sputtering method, an electroless plating method, an electron beam evaporation method or an ion plate method, or a combination of these methods. Alternatively, it is formed as a transparent conductive film such as a Nesa film containing SnO ₂ as a main component, a metal thin film, an alloy thin film, or a multi-layer film including these thin films. Further, the electrodeposition electrode 20 is formed thin so that the thickness is about 100 to 300 nm. As described above, since the electrodeposition electrode 20 is thin, one surface 10a of the rigid auxiliary substrate 10 is
The surface 20 a of the electrodeposition electrode 20 formed on the top surface has the same surface roughness as the one surface 10 a of the rigid auxiliary substrate 10.

Then, an electrodeposition resin layer including a color filter 31, a black resin layer 32 made of a black resin, a transparent resin layer 33 made of a transparent resin, and an alignment mark 34 on the surface of the electrodeposition electrode 20 by an electrodeposition method. Form 30. The electrodeposition resin layer 30 includes a color filter 31, a black resin layer 32, a transparent resin layer 33, and an alignment mark 34.
Are sequentially formed so as to be in close contact with each other, so as to cover the entire surface of the electrodeposition electrode 20.

The electrodeposition resin layer 30 is formed, for example, as follows. First, the surface of the electrodepositing electrode 20 other than a predetermined portion of the red color filter 31R is covered with a mask, and a resin containing a red colorant or the like is electrodeposited to form the red color filter 31R. The surface of the electrodeposited electrode 20 other than the predetermined portions to be the red color filter 31R and the green color filter 31G thus formed is covered with a mask, and a resin containing a green colorant or the like is electrodeposited to form the green color filter 31G. Form. Similarly, a resin containing a blue colorant or the like is electrodeposited to form a blue color filter 31B, and a color filter 31 including a red color filter 31R, a green color filter 31G and a blue color filter 31B is formed. The surface of the electrodeposited electrode 20 other than the portion of the formed color filter 31 and the black resin layer 32, which is predetermined as much as possible, is covered with a mask, and the black resin is electrodeposited to form the black resin layer 32. A portion of the formed color filter 31 and the black resin layer 32, and the surface of the electrodeposition resin 20 other than the portion that is predetermined as the alignment mark 34 is covered with a mask, and a resin containing a coloring agent such as a pigment is electrodeposited. The alignment mark 34 is formed. The alignment mark 34 may be formed simultaneously with the black resin layer 32, the red color filter 31R, the green color filter 31G or the blue color filter 31B. A transparent resin is electrodeposited on the entire surface of the exposed electrodeposition electrode 20 to form a transparent resin layer 33. The transparent resin layer 33 includes the formed color filter 31 and the black resin layer 3
2 and the alignment mark 34 are formed up to the end of the substrate so as to surround the periphery. As a result, the entire surface of the electrodeposition electrode 20 is covered with the electrodeposition resin layer 30.

The thickness of each part of the electrodeposited resin layer 30, that is, the color filter 31, the black resin layer 32, the transparent resin layer 33 and the alignment mark 34 does not necessarily have to be the same, and may be adjusted according to the optical design. Each may have an independent thickness.

FIG. 3 is a view showing a state in which the resin substrate 50 is bonded to the electrodeposition resin layer 30 via the adhesive layer 40. On the surface of the formed electrodeposition resin layer 30, an adhesive layer 40 made of an adhesive such as epoxy resin, unsaturated polyester, or ultraviolet curable acrylic resin is formed. The resin substrate 50, which is the second substrate, is attached to the electrodeposition resin layer 30 via the formed adhesive layer 40. The resin substrate 50 preferably has sufficient light transmissivity. As the material of the resin substrate 50, for example, polyether sulfone, polycarbonate, epoxy resin, acrylic resin, or the like can be used.

FIG. 4 shows the electrodeposition electrode 20 to the adhesive layer 4
It is a figure which shows the state which peeled the electrodeposition resin layer 30 and the resin substrate 50 which were bonded together through 0. After the resin substrate 50 is attached to the electrodeposition resin layer 30 via the adhesive layer 40, the adhesive layer 40 is removed from the electrodeposition electrode 20 at the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30. The electrodeposition resin layer 30 and the resin substrate 50, which are bonded together via the interposition, are peeled off.
The color filter integrated substrate 1 is obtained as described above.

As described above, the electrodeposition resin layer 30 includes the color filter 31, the black resin layer 32 and the transparent resin layer 33, and is formed so as to cover the entire surface of the electrodeposition electrode 20, so that the electrodeposition electrode When the electrodeposition resin layer 30 and the resin substrate 50 are separated from the electrodeposition electrode 20 at the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30, the electrodeposition resin layer 30 causes the electrodeposition electrode layer 2 to be separated.
It does not remain on the zero surface 20a. That is, the electrodeposition resin layer 30 formed on the rigid auxiliary substrate 10 can be transferred to the resin substrate 50 without causing transfer failure.

In the color filter-integrated substrate 1 thus manufactured, the color filter 31 and the black resin layer 3 are provided.
2, the electrodeposition resin layer 30 including the transparent resin layer 33 and the alignment mark 34 has the same surface roughness as the one surface 10a of the rigid auxiliary substrate 10 as described above.
No. 0 surface 20a, the electrodeposition resin layer 30 and the resin substrate 50 are separated and exposed from the electrodeposition electrode 20 at the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30. The surface roughness of the surface 20a of the electrodeposition electrode 20, that is, the same surface roughness as the one surface 10a of the rigid auxiliary substrate 10 is transferred. Further, the electrodeposition resin layer 3 existing on the surface 30b of the electrodeposition resin layer 30
The steps between each part of 0 and the unevenness in each part are not exposed.

On the other hand, a color filter is formed on a release layer made of resin provided on the rigid auxiliary substrate, the resin substrate is attached to the formed color filter with an adhesive, and then the color filter is separated. When the color filter and the resin substrate are separated from the release layer at the interface with the mold layer and the color filter formed on the rigid auxiliary substrate is transferred to the resin substrate, the surface of the release layer is transferred to the surface of the color filter. Therefore, even if a substrate having a smooth surface is used as the rigid body auxiliary substrate, a color filter having a smooth surface cannot be formed on the resin substrate.

In the present embodiment, as described above, the surface 2 of the electrodeposition electrode 20 having the same surface roughness as the one surface 10a of the rigid auxiliary substrate 10 is used instead of the release layer made of resin.
Since the color filter 31 is formed on the surface 0a and transferred to the resin substrate 50, a color having high dimensional accuracy and a smooth surface is obtained by a simple means of using a substrate having a smooth surface as the rigid auxiliary substrate 10 which is the first substrate. The color filter integrated substrate 1 having the filter 31 can be manufactured.

In this embodiment, the resin substrate 50 made of resin is used as the second substrate used for the color filter integrated substrate 1, but the present invention is not limited to this, and it has sufficient light transmittance. A glass substrate or the like may be used. Further, when the resin substrate 50, which is the second substrate, is bonded to the electrodeposition resin layer 30 via the adhesive layer 40, a substrate in which nothing is formed is used, but the present invention is not limited to this. Devices such as thin film transistors (abbreviation: TFT) on the substrate without
A substrate on which wirings and pixel electrodes are formed may be used to manufacture a color filter integrated substrate in which elements, wirings and pixel electrodes are located between the color filter and the substrate.

FIG. 5 is a schematic sectional view showing a simplified structure of the color filter integrated substrate 2 according to the second embodiment of the present invention. The color filter-integrated substrate 2 of the present embodiment is similar to the color filter-integrated substrate 1 of the first embodiment, and corresponding parts are designated by the same reference numerals and description thereof will be omitted.

It should be noted that the electrodeposition resin layer 30 and the resin substrate 150 are adhered to each other without an adhesive.

A method of manufacturing the color filter integrated substrate 2 shown in FIG. 5 will be described. Since the method of manufacturing the color filter integrated substrate 2 of the present embodiment is similar to the method of manufacturing the color filter integrated substrate 1 of the first embodiment, description of similar steps will be omitted and different steps will be described. To do.

In this embodiment, the electrodeposition resin layer 30 in the manufacture of the color filter integrated substrate 1 of the first embodiment is used.
And a step of adhering the resin substrate 50 via the adhesive layer 40, and a step of peeling the electrodeposition resin layer 30 and the resin substrate 50 adhered via the adhesive layer 40 from the electrodeposition electrode 20. Instead of the step of forming the uncured resin layer 153 on the surface of the electrodeposition resin layer 30, and the uncured resin layer 153.
Is performed to form a resin substrate 150 which is a second substrate, and a step of peeling the electrodeposition resin layer 30 and the resin substrate 150 from the electrodeposition electrode 20 and the flat plate 152.

FIG. 6 is a view showing a state in which an uncured resin layer 153 is formed on the surface of the electrodeposition resin layer 30. In the same manner as in the first embodiment, the rigid auxiliary substrate 1 which is the first substrate
A frame 151 having a thickness of about 0.5 mm is formed in the vicinity of the peripheral portion of the electrodeposition resin layer 30 formed above As the material of the frame 151, glass fiber reinforced plastic, stainless steel plate, glass plate or the like can be used. Frame 151
The polished flat plate 152 is arranged so as to face the rigid auxiliary substrate 10 through. As the flat plate 152, a polished glass plate, a ceramic plate, a metal plate, or the like can be used. An uncured resin material to be the resin substrate 150 is injected into a space formed by the rigid body auxiliary substrate 10 and the flat plate 152 to form an uncured resin layer 153 on the surface of the electrodeposition resin layer 30. As an uncured product of the resin that serves as the resin substrate 150, an epoxy resin, a heat-resistant acrylic resin, a heat-resistant thermoplastic resin typified by molten polyether sulfone, a photocurable resin, a glycidyl methacrylate resin, a divinylbenzene resin, A styrene resin or a methacrylic acid resin, or a copolymer thereof can be used. The formed uncured resin layer 153 is cured to form the resin substrate 150 that is the second substrate. Thus, the resin substrate 150 is formed by curing the uncured resin layer 153 formed on the surface of the electrodeposition resin layer 30, so that the electrodeposition resin layer 30 and the resin substrate 150 are bonded to each other. Firmly adheres and integrates without using an agent.

FIG. 7 shows an electrodeposition electrode 20 and a flat plate 152.
FIG. 4 is a diagram showing a state in which the resin substrate 150 and the electrodeposition resin layer 30 are cut after the electrodeposition resin layer 30 and the resin substrate 150 are peeled from FIG. After forming the resin substrate 150, the electrodeposition resin layer 30 and the resin substrate 150 are separated from the electrodeposition electrode 20 at the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30, and the flat plate 152 and the resin substrate 150 are separated from each other. At the interface, from the flat plate 152 to the resin substrate 150 and the electrodeposition resin layer 3
Peel 0. Since the electrodeposition resin layer 30 includes the color filter 31, the black resin layer 32, and the transparent resin layer 33 and is formed so as to cover the entire surface of the electrodeposition electrode 20, as in the first embodiment described above. When the electrodeposition resin layer 30 and the resin substrate 150 are separated from the electrodeposition electrode 20 at the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30, the electrodeposition resin layer 30 or the resin layer forming the resin substrate 150 is It does not remain on the surface 20a of the electrodeposition electrode 20.

Finally, the resin substrate 150 and the electrodeposition resin layer 30
And are cut to obtain a color filter integrated substrate 2 having a desired size.

In the color filter integrated substrate 2 thus manufactured, the electrodeposition electrode 20 and the electrodeposition resin layer 3 are formed.
0 from the electrodeposition electrode 20 to the electrodeposition resin layer 30
The surface 30a of the electrodeposition resin layer 30 exposed by peeling off the resin substrate 150 is the surface roughness of the surface 20a of the electrodeposition electrode 20, that is, a rigid body, as in the color filter integrated substrate 1 of the first embodiment. One surface 10 of the auxiliary substrate 10
The same surface roughness as a is transferred. Therefore, by the simple means of using a substrate having a smooth surface as the rigid auxiliary substrate 10 which is the first substrate, the color filter 31 having high dimensional accuracy and a smooth surface is provided, and the resin substrate 150 and the color filter 31 are combined. It is possible to manufacture the color filter integrated substrate 2 having a strong adhesive force.

As a display element according to the third embodiment of the present invention, a liquid crystal display element 6 having a color filter integrated substrate 3 manufactured in the same manner as the color filter integrated substrate 2 shown in FIG. 5 will be exemplified. FIG. 8 is a schematic sectional view showing a simplified configuration of the liquid crystal display element 6. Color filter integrated substrate 3 provided in the liquid crystal display element 6 of the present embodiment
Is similar to the color filter integrated substrate 2 of the second embodiment, and the corresponding portions are denoted by the same reference numerals and the description thereof will be omitted.

The liquid crystal display element 6 includes the color filter integrated substrate 3, the counter substrate 68 which is attached to the color filter integrated substrate 3 via the seal 65 so as to face the color filter integrated substrate 3, and the color filter integrated substrate 3 is electrodeposited. A smooth cured film 61 formed on the surface of the resin layer 30 and a transparent electrode 6 for driving a liquid crystal.
2, an alignment-treated alignment film 63, a liquid crystal layer 66 made of liquid crystal sandwiched between the color filter integrated substrate 3 and a counter substrate 68, a gap spacer 64 for adjusting the thickness of the liquid crystal layer 66, and a polarizing plate 67. It is an STN (Super Twisted Nematic) type liquid crystal display element configured to include and.

The liquid crystal display element 6 of the present embodiment has a color filter 31 having a high dimensional accuracy and a smooth surface as described above.
The color filter integrated substrate 3 having Therefore, the surface of the smoothing cured film 61, the transparent electrode 62, and the alignment film 63 formed on the surface of the electrodeposition resin layer 30 including the color filter 31 hardly has irregularities, and the color filter integrated type substrate 3 and the counter substrate. The cell thickness, which is the thickness of the liquid crystal layer 66 formed between the liquid crystal layer 68 and the liquid crystal layer 68, is uniform with little difference between and within the pixels. If the surface of the color filter is not smooth and the cell thickness is not uniform,
In particular, when STN liquid crystal is used, the electro-optical characteristics change due to the steps of the color filter, which is not preferable. Therefore, by using the color filter integrated substrate 3 having the color filter 31 having a high dimensional accuracy and a smooth surface as described above, the liquid crystal display element 6 having excellent display uniformity can be obtained.

A method of manufacturing the liquid crystal display element 6 shown in FIG. 8 will be described. First, the color filter integrated substrate 3 is manufactured in the same manner as in the second embodiment. After applying, for example, a thermosetting acrylic resin onto the surface of the electrodeposition resin layer 30 of the manufactured color filter integrated substrate 3 by spin coating,
By heat curing, the smooth cured film 61 is formed. The material of the smooth cured film 61 is not limited to the thermosetting acrylic resin, and epoxy resin or water glass may be used.

On the surface of the formed smooth-cured film 61, ITO having a thickness of 140 nm is formed by a sputtering method or the like.
The ITO film is formed so that
The transparent electrode 62 for driving the liquid crystal is formed by patterning the TO film. The transparent electrode 62 may be formed of a Nesa film containing SnO ₂ as a main component, or formed as a multilayer film by providing a film of an oxide or nitride of silicon, aluminum or titanium under the ITO film or the Nesa film. You may. As described above, in the color filter integrated substrate 3 of the present embodiment, the end of the color filter integrated substrate 3 is arranged so that the transparent resin layer 33 surrounds the color filter 31, the black resin layer 32 and the alignment mark 34. Since the parts are provided, the alignment at the time of patterning for forming the transparent electrode 62 can be easily performed. Next, an alignment film 63 is formed on the transparent electrode 62, and baking and alignment treatment are performed. Similarly, the transparent electrode 62 and the alignment film 6 subjected to the alignment treatment are formed on the counter substrate 68.
3 is formed.

A gap spacer 64 is provided between the color filter integrated substrate 3 on which the alignment film 63 is formed and the counter substrate 68.
The color filter integrated substrate 3 and the counter substrate 68 are attached to each other with the seal 65 sandwiched therebetween. Liquid crystal is injected into a space formed by the counter substrate 68 and the color filter integrated substrate 3 to form a liquid crystal layer 66, and a polarizing plate 67 is formed on the surface of the counter substrate 68. The liquid crystal display element 6 is obtained as described above.

[Examples] The present invention will be described in more detail with reference to the following examples, but the materials used for the respective parts,
The thickness of each part and the method of forming each part are not limited to this.

Example 1 The color filter integrated type substrate 2 shown in FIG. 5 is manufactured.

An optically polished glass substrate having a thickness of 10 mm is used as the rigid auxiliary substrate 10, and the rigid auxiliary substrate 10 is
ITO was formed into a film having a thickness of 200 nm by a sputtering method to form an electrodeposition electrode 20.

On the surface of the electrodeposited electrode 20 thus formed, Table 1
By electrodepositing the colorant and resin shown in (1), the color filter 31 including the red color filter 31R, the green color filter 31G, and the blue color filter 31B, the black resin layer 32 including the black resin, the alignment mark 34, and the transparent resin The transparent resin layer 33 is sequentially formed to form the electrodeposition resin layer 30. The thickness of each of the color filter 31, the black resin layer 32, the transparent resin layer 33, and the alignment mark 34 was 2 μm.

[0054]

[Table 1]

A frame 1 made of glass fiber reinforced plastic having a thickness of 0.5 mm is provided near the periphery of the electrodeposition resin layer 30.
51 was formed. Rigid auxiliary substrate 10 through frame 151
Plate 1 made of a glass substrate polished so as to face
52 was arranged. An uncured epoxy resin was injected into the space formed by the rigid auxiliary substrate 10 and the flat plate 152 to form an uncured resin layer 153. The uncured resin layer 153 thus formed was heated and cured at 200 ° C. for 3 hours to form the resin substrate 150.

At the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30, the electrodeposition resin layer 30 and the resin substrate 150 are separated from the electrodeposition electrode 20, and the flat plate 152 and the resin substrate 15 are separated.
At the interface with 0, the resin substrate 150 and the electrodeposition resin layer 30 were peeled off from the flat plate 152. The color filter integrated substrate 2 shown in FIG. 5 was manufactured as described above.

(Comparative Example 1) On a resin substrate 80 made of epoxy resin, in the same manner as in Example 1, a color filter 81 made up of a red color filter 81R, a green color filter 81G and a blue color filter 81B and a black resin. An electrodeposition resin layer 83 including the black resin layer 82 was formed. As described above, the color filter integrated substrate 8
Was manufactured.

(Evaluation 1) FIG. 9A shows the color filter 3 of the color filter integrated substrate 2 manufactured in the first embodiment.
FIG. 9 is a diagram showing a surface profile of the electrodeposition resin layer 30 including the black resin layer 32, the transparent resin layer 33, and the alignment mark 34. FIG. 9B is a color filter integrated substrate 8 manufactured in Comparative Example 1. FIG. 3 is a diagram showing a simplified cross-sectional structure of FIG. 2 and a surface profile of an electrodeposition resin layer 83.

From FIG. 9, the surface of the electrodeposition resin layer 30 of the color filter integrated substrate 2 manufactured in Example 1 is the same as in Comparative Example 1.
It was found that it was extremely smooth as compared with.

Comparative Example 2 A color filter-integrated substrate was manufactured in the same manner as in Example 1 except that the transparent resin layer 33 was not formed.

However, when the electrodeposition resin layer 30 and the resin substrate 150 are separated from the electrodeposition electrode 20 at the interface between the electrodeposition electrode 20 and the electrodeposition resin layer 30, the alignment mark 34 of the electrodeposition resin layer 30 is removed. It remains on the surface 20a of the electrodeposition electrode 20. Further, the epoxy resin forming the resin substrate 150 is fixed to the electrodeposition electrode 20, bulk breakdown occurs inside the resin substrate 150, and the electrodeposition electrode 20 and the resin substrate 150 cannot be separated cleanly, A part of the epoxy resin forming the resin substrate 150 remains on the surface 20a of the electrodeposition electrode 20.

Example 2 A thermosetting acrylic resin was applied on the surface of the electrodeposition resin layer 30 of the color filter-integrated substrate 2 manufactured in Example 1 by spin coating, and then 15
Heat cure by heating at 0 ° C for 120 minutes,
A smooth cured film 61 was formed.

Comparative Example 3 A smooth cured film 84 was formed on the electrodeposition resin layer 83 of the color filter integrated substrate 8 manufactured in Comparative Example 1 in the same manner as in Example 2.

(Evaluation 2) FIG. 10A is a diagram showing the surface profile of the smooth cured film 61 formed in Example 2, and FIG. 10B is the smooth cured film 8 formed in Comparative Example 3.
4 is a diagram showing a state in which a smoothing hardened film 84 is formed on the surface profile of FIG.

From FIG. 10, it was found that the surface of the smooth-cured film 61 formed in Example 2 had almost no unevenness and was smoother than that of the smooth-cured film 84 formed in Comparative Example 3. On the surface of the smooth cured film 84 formed in Comparative Example 3,
There was unevenness reflecting the surface roughness of the surface of the electrodeposition resin layer 83.

[0066]

As described above, according to the present invention, a color filter integrated substrate having a color filter having high dimensional accuracy and a smooth surface is obtained by a simple means of using a substrate having a smooth surface as the first substrate. Can be manufactured.

Further, according to the present invention, by the simple means of using a substrate having a smooth surface as the first substrate, a color filter having a high dimensional accuracy and a smooth surface is provided, and the adhesive force between the substrate and the color filter is provided. It is possible to manufacture a substrate with a strong color filter.

Further, according to the present invention, it is possible to obtain a color filter integrated substrate having a color filter having a high dimensional accuracy and a smooth surface.

Further, according to the present invention, the thickness of the layer formed between the color filter integrated type substrate and the counter substrate provided so as to face the color filter integrated type substrate is set between pixels and between pixels. Since there is almost no difference in the inside and the display is uniform, a display element having excellent display uniformity can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a simplified configuration of a color filter integrated substrate 1 according to a first embodiment of the present invention.

FIG. 2 is a view showing a state in which an electrodeposition electrode 20 and an electrodeposition resin layer 30 are formed on a rigid body auxiliary substrate 10.

FIG. 3 is a diagram showing a state in which a resin substrate 50 is attached to an electrodeposition resin layer 30 via an adhesive layer 40.

FIG. 4 is a diagram showing a state in which an electrodeposition resin layer 30 and a resin substrate 50, which are bonded together via an adhesive layer 40, are separated from the electrodeposition electrode 20.

FIG. 5 is a schematic sectional view showing a simplified configuration of a color filter integrated substrate 2 according to a second embodiment of the present invention.

FIG. 6 shows an uncured resin layer 1 on the surface of an electrodeposition resin layer 30.
It is a figure which shows the state which formed 53.

FIG. 7 is a view showing a state in which the resin substrate 150 and the electrodeposition resin layer 30 are cut after the electrodeposition resin layer 30 and the resin substrate 150 are separated from the electrodeposition electrode 20 and the flat plate 152.

FIG. 8 is a schematic sectional view showing a simplified configuration of a liquid crystal display element 6.

9 is a surface profile of the electrodeposition resin layer 30 of the color filter integrated substrate 2 manufactured in Example 1, and a simplified cross-sectional structure and electrodeposition resin layer of the color filter integrated substrate 8 manufactured in Comparative Example 1. FIG. It is a figure which shows the surface profile of 83.

10 is a surface profile of a smooth cured film 61 formed in Example 2 and a smooth cured film 8 formed in Comparative Example 3. FIG.
4 is a diagram showing a state in which a smoothing hardened film 84 is formed on the surface profile of FIG.

[Explanation of symbols]

1,2,3 color filter integrated substrate 6 Liquid crystal display element 10 Rigid auxiliary board 20 Electrode for electrodeposition 30 Electrodeposited resin layer 31 color filter 31R Red color filter 31G green color filter 31B blue color filter 32 Black resin layer 33 Transparent resin layer 34 Alignment mark 40 adhesive layer 50 resin substrate 61 Smooth cured film 62 transparent electrode 63 Alignment film 64 gap spacer 65 seals 66 Liquid crystal layer 67 Polarizer 68 Counter substrate 150 resin substrate 151 frames 152 flat plate 153 uncured resin layer

Claims (4)

[Claims] 1. A step of forming an electrodeposition electrode on one surface of a first substrate, and a resin layer containing a color filter, a black resin and a transparent resin on the surface of the electrodeposition electrode by an electrodeposition method. A step of forming, a step of adhering a second substrate to the resin layer with an adhesive, and an interface between the electrodeposition electrode and the resin layer, from the electrodeposition electrode to the resin layer and the second substrate And a step of peeling off the color filter integrated substrate. 2. A step of forming an electrodeposition electrode on one surface of a first substrate, and a resin layer containing a color filter, a black resin and a transparent resin on the surface of the electrodeposition electrode by an electrodeposition method. A step of forming, a step of forming an uncured resin layer on the surface of the resin layer, a step of curing the uncured resin layer to form a second substrate, the electrodeposition electrode and the resin A step of peeling the resin layer and the second substrate from the electrodeposition electrode at the interface with the layer, the method for manufacturing a color filter integrated substrate. 3. A color filter-integrated substrate manufactured by using the method for manufacturing a color filter-integrated substrate according to claim 1. 4. A display device comprising the color filter integrated substrate according to claim 3.