JP2011112690A - Color filter substrate, method for manufacturing the color filter substrate, and display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter substrate whose height is uniform irrespective of an arrangement place of a spacer when forming the spacer by lamination of a coloring layer on a grating pattern-like black matrix on a boundary between pixels at a requested position for example. <P>SOLUTION: In the color filter substrate having a shading layer region forming a shading layer on a transparent substrate, a picture element region forming the coloring layer of a plurality of colors in an opening part divided with the shading layer region, and the spacer, the spacer laminates the coloring layer of the plurality of the colors in a prescribed shape and forms in the shading layer region between picture elements comprising the uppermost coloring layer of the spacer. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a color filter substrate having a spacer formed by laminating a light shielding layer and a colored layer, a method for producing the same, and a liquid crystal display device.

A liquid crystal display device has features such as a small size, a thin shape, a light weight, and low power consumption, and thus is widely used in various display devices such as a personal computer, a television device, and a mobile phone.
In such a liquid crystal display device, in order to maintain a predetermined thickness (cell gap) of the liquid crystal layer between both the color filter substrate and the thin film transistor (TFT) substrate, glass or resin spherical particles (beads) called a spacer are used. ) Or rods were scattered inside the cells.
Since this spacer exists as a foreign substance with respect to the liquid crystal, the alignment of the liquid crystal molecules in the vicinity of the spacer particles is disturbed, light leakage occurs in this portion, the contrast of the liquid crystal display device is lowered, and the display phase quality is adversely affected. It has a problem of affecting.

  As a technique for solving this problem, for example, by patterning a photosensitive resin layer by a photolithography method, a columnar resin spacer is formed on a black matrix in a lattice pattern at a desired position, for example, at a boundary between pixels. There has been proposed a method for forming the. Such a spacer is hereinafter referred to as a photo spacer.

  Since the photo spacer can be formed at a position avoiding the pixels, an improvement in display quality can be desired. The photospacer is generally formed by applying a photosensitive resin composition to the substrate surface, drying it, exposing it to light through a photomask having a predetermined fine pattern, developing it, and baking it.

  There has also been proposed a method of forming such a photo spacer by three-dimensionally laminating a plurality of colored layers two-dimensionally at a predetermined position on the light shielding layer.

  Even when the above photospacer is used, if the distance between the color filter substrate and the TFT substrate is not accurately maintained, a difference occurs in the thickness of the liquid crystal layer, resulting in coloring due to the difference in optical rotation characteristics of the liquid crystal, or partial In some cases, color unevenness may occur and display may not be performed correctly. In order to make the spacer height uniform, a method of changing the size of the pattern to be stacked depending on the arrangement location can be considered, but the design becomes complicated.

Techniques for forming a spacer for a liquid crystal display device by a photolithography technique are disclosed in Patent Documents 1 to 4.
Moreover, the technique which forms the spacer for liquid crystal display devices by superimposition of a colored layer is disclosed by patent documents 5-7.

JP 9-258192 A Japanese Patent Laid-Open No. 11-248921 JP 2001-201750 A Japanese Patent Laid-Open No. 2001-108813 JP-A-4-93924 JP-A-4-184423 JP 2007-212826 A

  When a spacer formed by stacking colored layers is formed on a black matrix having a lattice pattern at a desired position, for example, at the boundary between pixels, there is a problem that the height varies depending on the arrangement position of the spacer.

Accordingly, the inventors have conducted intensive research and found a means for stacking at a uniform height regardless of the location of the spacer when the spacer is formed on the lattice-patterned black matrix.
In order to solve the above-described problems, a first aspect of the present invention is that a light-shielding layer region on which a light-shielding layer is formed and a plurality of colored layers are formed in an opening section defined by the light-shielding layer region on a transparent substrate. In a color filter substrate provided with a pixel region and a spacer,
The spacer is formed by laminating a plurality of colored layers in a predetermined shape,
It is a color filter substrate characterized in that it is formed in a light shielding layer region between picture elements consisting of the uppermost colored layer of the spacer.

  According to a second aspect of the present invention, the spacer is continuous at a symmetrical position in the vertical direction from a dividing line that vertically cuts in the center on the same color pixel (one section of the colored layer region surrounded by the light shielding layer region). Alternatively, the color filter substrate according to claim 1, wherein the color filter substrate is alternately arranged at a distance smaller than ½ of the width of the picture element from the dividing line, and the height difference is less than 0.05 μm.

According to a third aspect of the present invention, a step of forming a light-shielding layer having a predetermined pattern having a spacer formation region on a transparent substrate, and coloring of a plurality of colors arranged two-dimensionally in the region partitioned by the light-shielding layer Forming a layer region;
Laminating a colored layer of a plurality of colors three-dimensionally in the spacer formation region of the light shielding layer,
In order to make the height of the spacer uniform, the position where the spacer that is three-dimensionally stacked in the spacer formation region is made to overlap the region of the colored layer to be formed last,
This is a method for manufacturing a color filter substrate.

  According to a fourth aspect of the present invention, there is provided a display device using the color filter substrate according to any one of the first and second aspects.

  According to the present invention, the height of the spacer of the color filter substrate manufactured using the method of forming the spacer on the light shielding layer by laminating a plurality of colored layers is made independent of the position on the transparent substrate. It becomes possible.

1 is a schematic plan view showing an example of a color filter substrate of the present invention. Sectional drawing at the time of cut | disconnecting by the X1-X1 line | wire of FIG. Sectional drawing at the time of cut | disconnecting by the X2-X2 line | wire in FIG. 1 in the state which coated blue after forming a red picture element and a green picture element. Sectional drawing at the time of cut | disconnecting by the X1-X1 line | wire in FIG. 1 in the state which coated blue after forming a red picture element and a green picture element. Sectional drawing at the time of cut | disconnecting by the X1-X1 line | wire in FIG. 1 in the state which has arrange | positioned the lamination | stacking spacer between blue picture elements, formed the red pattern and the green pattern, and was coated with blue. Sectional drawing at the time of cut | disconnecting by the X1-X1 line | wire in FIG. 1 in the state which has arrange | positioned the lamination | stacking spacer between blue picture elements, and formed the blue pattern after forming a red pattern and a green pattern. Sectional drawing at the time of cut | disconnecting by the X1-X1 line | wire in FIG. 1 in the state which arrange | positioned the lamination | stacking spacer between blue picture elements, formed the red pattern and the blue pattern, and was coated with green. Sectional drawing at the time of cut | disconnecting by the X1-X1 line | wire in FIG. 1 in the state which has arrange | positioned the lamination | stacking spacer between blue picture elements, and formed the green pattern after forming a red pattern and a blue pattern.

Hereinafter, a color filter substrate for a liquid crystal display device and a method for manufacturing the color filter substrate according to the present invention will be described.
First, the color filter substrate of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view showing an example of the color filter substrate of the present invention, and FIG. 2 is a cross-sectional view taken along line X1-X1.
The color filter substrate shown in FIGS. 1 and 2 is formed at the opening of the base material 1, the light shielding layer 4 formed on the base material 1 in a lattice pattern, and the light shielding layer BM on the base material 1, and the red ( R), green (G), and blue (B) are colored layers (picture elements) composed of three colored patterns 2R, 2G, and 2B, and a light shielding layer 4, a red pattern 3R, a green pattern 3G, and a blue pattern 3B are stacked. The laminated spacer 5 is provided.
In the example of FIG. 1, columnar spacers are arranged between the blue patterns 2B at symmetrical distances in the vertical direction from the dividing line that vertically cuts the blue pattern 3B indicated by Y1, Y2, and Y3. In order to make the cell gap of the liquid crystal display device uniform, the columnar spacer heights H (1) and H (2) need to be the same height.

  The present inventors can arrange any of the colors shown in FIG. 1 as an example, generally any color, but the height of the laminated spacers arranged at a symmetric distance perpendicular to the dividing line It was found that the color layers arranged so as to be sandwiched can be made more uniform by adding colors last.

Here, the reason why the height of the laminated spacer changes depending on the color order will be described.
FIG. 3 is a cross-sectional view taken along line X2-X2 in FIG. 1 in a state where the blue color is coated after forming the red picture element 2R and the green picture element 2G. Since there are the red picture element 2R and the green picture element 2G at both ends of the region where the blue picture element is formed, the height of the blue coating film surface from the base material 1 changes gradually. This tendency is the same in FIG. 4 showing a cross section taken along line X1-X1 in FIG. In FIG. 4, the laminated spacer is omitted.

Next, the case where the color order is changed will be described. When a laminated spacer is arranged between blue picture elements as shown in FIG. 1, a cross-sectional view when cutting along the X1-X1 line when forming a green pattern after forming a red pattern and finally coating blue is shown. FIG. The thicknesses A1 and A2 riding on each laminated spacer are the same. Therefore, as shown in FIG. 6, the respective stacked spacer heights H (3) and H (4) after patterning are equal. When the order of color entry is changed without changing the arrangement position of the laminated spacer, for example, when formed in the order of a red pattern, a blue pattern, and a green pattern, the thickness of the green coating film is as shown in FIG. It changes under the influence of already formed red and blue picture elements. That is, A3 is thick and A4 is thin. Therefore, as shown in FIG. 8, H (6) is lower than the patterned spacer height H (5).

Hereinafter, each configuration of the color filter substrate of the present invention will be described.
A. Black Matrix Layer and Colored Layer As a method for forming a color filter or a black matrix layer on a transparent substrate, a pigment dispersion method has become the mainstream. In the pigment dispersion method, a colored photosensitive resin coating layer in which a coloring material such as an organic pigment is dispersed is patterned by a known photolithography method to form a color filter, and pixels in a plurality of colored layers (red, green, blue, etc.). It is the method of forming.

The thickness of the black matrix layer is 1 to 3 μm, the width is 5 to 150 μm, and the film thickness (thickness) of the red, green and blue pixels is 1.5 to 3.5 μm (colored photosensitive resin The film thickness of the black matrix is 2.0 μm, the film thickness of each pixel is approximately 2.5 μm, and the film thickness of the overcoat layer is 1.5 μm. For example, the red layer formed on the black matrix has a thickness of about 1.86 μm, the green layer has a thickness of 1.54 μm, the blue layer has a thickness of about 1.23 μm, and the overcoat layer has a thickness of about 0.3 μm. , And a liquid crystal cell gap as a liquid crystal display device is within a range in which approximately 2 μm to 5 μm can be applied.

The black matrix layer is a light-shielding pattern formed between the pixels for improving the contrast of the liquid crystal display device, which is formed using a black resin. As a method for forming the black matrix layer, there is a method in which a black photosensitive resin is used to form a matrix by a photolithography method. Carbon black and a plurality of organic pigments can be used as the black color material.
The black photosensitive resin and the colored photosensitive resin used for forming the black matrix layer and the color filter are, for example, a pigment dispersed in a resin binder using a dispersant, and a monomer, an initiator, a sensitizer, It is prepared by adding a solvent or the like.

In the present embodiment, the black photosensitive resin and the colored photosensitive resin used for forming the black matrix layer and the color filter are mainly composed of a resin binder and an initiator, and the resin binder is photopolymerized, thermally polymerized, or photopolymerized. And undergoes three-dimensional crosslinking through thermal polymerization.
By three-dimensionally crosslinking the resin binder of the black matrix layer and the color filter, it is possible to suppress the thickness of the black matrix layer and the color filter from being reduced by a load in the panel assembling process.

  Examples of resin binders suitable for photopolymerization include acrylate resins, examples of resin binders suitable for thermal polymerization include epoxy resins, and examples of resin binders suitable for photopolymerization and thermal polymerization include epoxy acrylate resins. It is done.

  For the red pixel, for example, C.I. I. Pigment Red 7, 14, 41, 48: 2, 48: 3, 48: 4, 81: 1, 81: 2, 81: 3, 81: 4, 146, 168, 177, 178, 179, 184, 185, Red pigments such as 187, 200, 202, 208, 210, 246, 254, 255, 264, 270, 272, and 279 can be used, and a yellow pigment and an orange pigment can also be used in combination.

Examples of yellow pigments include C.I. I. Pigment Yellow 1, 2, 3, 4, 5, 6, 10, 12, 13, 14, 15, 16, 17, 18, 24, 31, 32, 34, 35, 35: 1, 36, 36: 1, 37, 37: 1, 40, 42, 43, 53, 55, 60, 61, 62, 63, 65, 73, 74, 77, 81, 83, 93, 94, 95, 97, 98, 100, 101, 104, 106, 108, 109, 110, 113, 114, 115, 116, 117, 118, 119, 120, 123, 126, 127, 128, 129, 138, 139, 147, 150, 151, 152, 153, 154, 155, 156, 161, 162, 164, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 179, 180 181,182,187,188,193,194,199,198,213,214, and the like.
Examples of the orange pigment include C.I. I. Pigment Orange 36, 43, 51, 55, 59, 61, 71, 73 and the like.

When the red pixel contains one or more of diketopyrrolopyrrole red pigment and anthraquinone red pigment among these pigments, it is easy to obtain any Rth (retardation (phase difference) value). Therefore, it is preferable.
This is because the diketopyrrolopyrrole red pigment can be made either positive or negative by devising the finer treatment, its absolute value can be controlled to some extent, and the anthraquinone red pigment This is because it is easy to obtain Rth close to 0 regardless of the miniaturization process.
The amount used is 10 to 90% by weight of the diketopyrrolopyrrole red pigment and 5 to 70% by weight of the anthraquinone red pigment based on the total weight of the pigment. From the viewpoint of contrast and the like, in particular, when focusing on the contrast, it is more preferable that the diketopyrrolopyrrole red pigment is 25 to 75% by weight and the anthraquinone red pigment is 30 to 60% by weight.

  For example, C.I. I. Green pigments such as Pigment Green 7, 10, 36, 37, and 58 can be used, and a yellow pigment can be used in combination. As the yellow pigment, the same pigments as those used for the red pixel can be used.

Examples of blue pixels include C.I. I. Pigment Blue 15, 15: 1, 15: 2, 15: 3, 15: 4, 15: 6, 16, 22, 60, 64, and the like can be used, and a purple pigment can be used in combination. Examples of purple pigments include C.I. I. Pigment Violet 1, 19, 23, 27, 29, 30, 32, 37, 40, 42, 50 and the like.
When the blue pixel contains at least one of a metal phthalocyanine blue pigment and a dioxazine purple pigment among these pigments, it is easy to obtain a retardation value close to 0.
The amount used is 40 to 100% by weight of the metal phthalocyanine blue pigment and 1 to 50% by weight of the dioxazine violet pigment based on the total weight of the pigment. It is preferable from a point, Furthermore, it is more preferable to make a metal phthalocyanine blue pigment 50 to 98 weight% and a dioxazine purple pigment 2 to 25 weight%. In the above, examples of the metal phthalocyanine blue pigment include C.I. I. Pigment Blue 15: 6, and dioxazine-based purple pigments include C.I. I. Pigment Violet 23 is preferable in terms of excellent light resistance, heat resistance, transparency, coloring power, and the like.

In addition, a color filter substrate can be produced by forming an overcoat layer, a transparent electrode layer, an alignment film, or the like on the light shielding portion, the colored layer, and the columnar spacer as necessary.
The overcoat layer is used for protecting the colored layer from mechanical external force, heat, and the like, and preventing elution of impurities caused by the pigment and dye contained in the colored layer. Properties required for this coating material include flatness for flattening the unevenness of the substrate, heat resistance, depolarization (contrast), transparency (transmittance in the visible light wavelength region), adhesion, and mechanical strength ( Hardness).

B. Spacer Spacer is used for controlling the cell gap of liquid crystal by laminating two or more colored layers on the black matrix layer. The number of colors to be superimposed is defined by the cell gap necessary for the liquid crystal display device, but preferably two to three colors.

  When the overcoat layer is simultaneously formed on the spacer portion and the colored pixel, the thickness of the overcoat layer laminated on the spacer portion is smaller than the thickness on the colored pixel. Therefore, if the spacer height is defined as the height from the surface on the colored pixel including the overcoat layer, the height of the spacer is lower after the overcoat layer is formed than before the overcoat formation. Specifically, the height of the laminated spacer from the glass substrate before forming the overcoat layer is 7.0 μm, the thickness of the colored layer is 2.5 μm, and the height of the laminated spacer from the glass substrate after forming the overcoat layer is Assuming that the thickness obtained by adding the coloring layer and the overcoat layer to 4.0 μm is 7.3 μm, the spacer height based on the colored pixel surface before the overcoat formation is 4.5 μm, and the spacer height after the overcoat formation is 3. 3 μm.

[Production of coloring material]
Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto. In the examples and comparative examples, “part” means “part by weight”.
The following were used as the coloring agents for coloring the coloring material used for producing the color filter.
Red pigment: C.I. I. Pigment Red 254 (“Ilgar Forred B-CF” manufactured by Ciba Specialty Chemicals) and C.I. I. Pigment Red 177 (“Chromophthal Red A2B” manufactured by Ciba Specialty Chemicals)
Green pigment: C.I. I. Pigment Green 58 (Dainippon Ink Chemical Co., Ltd.), and C.I. I. Pigment Yellow 150 ("Funcheon First Yellow Y-5688" manufactured by Bayer)
Blue pigment: C.I. I. Pigment Blue 15 (“Rionol Blue ES” manufactured by Toyo Ink) C.I. I. Pigment Violet 23 (BASF "Paliogen Violet 5890")
Red, green, and blue coloring materials were prepared using the respective pigments.
-Red coloring material After stirring and mixing the mixture of the following composition uniformly, it disperse | distributed with the sand mill for 5 hours using the glass bead of diameter 1mm, Then, it filtered with a 5 micrometer filter, and produced the dispersion of the red pigment.
Red pigment: C.I. I. Pigment Red 254 18 parts by weight Red pigment: C.I. I. Pigment Red 177 2 parts by weight Acrylic varnish (solid content 20%) 108 parts by weight Thereafter, a mixture having the following composition was stirred and mixed to be uniform and then filtered through a 5 μm filter to obtain a red colored material.
150 parts by weight of the above dispersion 13 parts by weight of trimethylolpropane triacrylate (“TMP3A” manufactured by Osaka Organic Chemical Industry Co., Ltd.)
Photoinitiator 3 parts by weight (“Irgacure 907” manufactured by Ciba Specialty Chemicals)
Sensitizer ("EAB-F" manufactured by Hodogaya Chemical Co., Ltd.) 1 part by weight Cyclohexanone 253 parts by weight, green coloring material The same method as that for the red coloring material was used so that the composition would be the following composition.
Green pigment: C.I. I. Pigment Green 58 16 parts by weight Yellow pigment: C.I. I. Pigment Yellow 150 8 parts by weight Acrylic varnish (solid content 20%) 102 parts by weight Trimethylolpropane triacrylate 14 parts by weight (“TMP3A” manufactured by Osaka Organic Chemical Industry Co., Ltd.)
Photoinitiator 4 parts by weight (“Irgacure 907” manufactured by Ciba Specialty Chemicals)
Sensitizer ("EAB-F" manufactured by Hodogaya Chemical Co., Ltd.) 2 parts by weight Cyclohexanone 257 parts by weight, blue coloring material Each of the compositions was prepared in the same manner as the red coloring material so that the composition was as follows.
Blue pigment: C.I. I. Pigment Blue 15 50 parts by weight Purple pigment: C.I. I. Pigment Violet 23 2 parts by weight Dispersant (“Solce Birds 20000” manufactured by Zeneca) 6 parts by weight Acrylic varnish (solid content 20%) 200 parts by weight Trimethylolpropane triacrylate 19 parts by weight (“TMP3A” manufactured by Osaka Organic Chemical Industry Co., Ltd.)
Photoinitiator 4 parts by weight (“Irgacure 907” manufactured by Ciba Specialty Chemicals)
Sensitizer ("EAB-F" manufactured by Hodogaya Chemical Co., Ltd.) 2 parts by weight Cyclohexanone 214 parts by weight

[Formation of colored layer]
A colored layer was formed using the obtained coloring material.
A red coloring material was applied to a glass substrate by spin coating so that the final film thickness (film thickness after exposure, development, and baking) was 2.5 μm. After drying for 60 seconds under a reduced pressure of 133 Pa, 50 mJ / cm ² of light from a high-pressure mercury lamp is irradiated through a striped photomask for forming a colored layer and developed with an alkali developer for 60 seconds to give a striped red color. A layer was obtained. Then, it baked at 230 degreeC for 30 minutes.
Next, the green coloring material was similarly applied by spin coating so that the finished film thickness was 2.5 μm. After drying for 60 seconds under a reduced pressure of 133 Pa, the green colored layer was obtained by exposing and developing through a photomask so that a pattern was formed at a position adjacent to the aforementioned red colored layer. Then, it baked at 230 degreeC for 30 minutes.
Further, in the same manner as red and green, the finished film thickness is 2.6 for the blue coloring material.
A blue colored layer adjacent to the red and green colored layers at μm was obtained. Thus, a color filter substrate having a striped colored layer of red, green and blue on the transparent substrate was obtained. Then, it baked at 230 degreeC for 30 minutes.

In addition, a pattern in which red, green, and blue layers are stacked on a black matrix between blue picture elements in the last color order is provided as a spacer. The spacer layer red layer was prepared using a 150 μm × 75 μm rectangular pattern, the green layer was formed using a 50 μm × 40 μm rectangular pattern, and the blue layer was formed using a 25 μm circular pattern mask. The green and blue layers of the spacer part were formed at positions where the center of the pattern was offset by 40 μm on the red side and 40 μm on the green side with respect to the dividing line of the blue picture element.
The width of the picture element at this time was 130 μm.

[Formation of overcoat layer]
The example of the resin composition for overcoat layer formation is shown below.
The rotor was placed in a sample bottle (200 ml) and placed on a magnetic stirrer. 37 g of cyclohexanone and 52 g of diethylene glycol dimethyl ether were placed in a sample bottle. While stirring, epoxy resin; ESF-300 (manufactured by Nippon Steel Chemical Co., Ltd .: bisphenolfluorene type epoxy resin, epoxy equivalent of 231 g / eq) 6 g, epoxy resin; EHPE3150 (manufactured by Daicel Chemical Industries, Ltd .: alicyclic type) Solid epoxy resin, 9 g of epoxy groups in the molecule, epoxy equivalent 170 g / eq) 2 g, epoxy resin; EOCN-1020 (Nippon Kayaku Co., Ltd. Orthocresol novolac type epoxy resin, epoxy equivalent 200 g / eq) 1
4 g was added and completely dissolved. Subsequently, 20 g of trimellitic anhydride was added as a curing agent and sufficiently stirred and dissolved, and then 0.10 g of dimethylcyclohexylamine was added as a curing accelerator. Further, 3.0 g of a silane coupling agent (S-510, manufactured by Chisso Corporation) and 0.12 g of a surfactant (manufactured by Sumitomo 3M; Fluorad FC-430) were added and sufficiently stirred and dissolved. Thus, the desired overcoat layer-forming resin composition was obtained.

  The overcoat layer forming resin composition is applied to a color filter substrate having a black matrix and a colored layer formed on a glass substrate, dried at 133 Pa for 60 seconds, pre-baked at 90 ° C. for 120 seconds, and then baked at 230 ° C. for 30 minutes. As a result, an overcoat layer was formed.

A pattern in which red, green, and blue layers were stacked on a black matrix between blue picture elements in the last color order was provided as a spacer. The spacer layer red layer was prepared using a 150 μm × 75 μm rectangular pattern, the green layer was formed using a 30 μm × 30 μm circular pattern, and the blue layer was formed using a 20 μm circular pattern mask. The green layer and blue layer of the spacer part were formed at positions where the center of the pattern was offset by 50 μm on the red side and 50 μm on the green side with respect to the dividing line of the blue picture element.
<Comparative Example 1>

A color filter substrate was produced in the same manner as in Example 1 except that a spacer was provided with a pattern in which red, green, and blue layers were laminated on a black matrix between green picture elements in the second color order. The green and blue layers of the spacer part were formed at positions where the center of the pattern was offset by 40 μm on the red side and 40 μm on the blue side with respect to the dividing line of the green picture element.
<Comparative example 2>

A color filter substrate was prepared in the same manner as in Example 2 except that a spacer was provided with a pattern in which red, green, and blue layers were laminated on a black matrix between green picture elements in the second color order. The green and blue layers of the spacer part were formed at positions where the center of the pattern was offset by 50 μm on the red side and 50 μm on the blue side with respect to the dividing line of the green picture element.
<Comparative Example 3>

A color filter substrate was produced in the same manner as in Example 1 except that a spacer was provided with a pattern in which red, green, and blue layers were laminated on a black matrix between red picture elements having the first color order. The green and blue layers of the spacer part were formed at positions where the center of the pattern was offset by 40 μm on the blue side and 40 μm on the green side with respect to the dividing line of the red picture element.
<Comparative example 4>

  A color filter substrate was prepared in the same manner as in Example 2 except that a pattern in which red, green, and blue layers were stacked on a black matrix between red picture elements having the first color order was used as a spacer. The green and blue layers of the spacer part were formed at positions where the center of the pattern was offset by 50 μm on the blue side and 50 μm on the green side with respect to the dividing line of the red picture element.

[Measurement of spacer height]
The height of the spacer after the overcoat layer was formed was measured with a stylus type fine shape measuring instrument ET4000A manufactured by Kosaka Laboratory. The measurement is performed by cutting the CF at a distance of about 300 μm from the spacer to expose the glass surface, and measuring 40 times while shifting the measurement distance in the x direction by 1 μm by 1000 μm and shifting it by 1 μm in the y direction. Profile. Since the spacer height for determining the cell gap is usually based on the surface of the overcoat layer formed on the colored picture element, the height from the highest point of the spacer to the surface of the overcoat layer on the green picture element is used. The value obtained by subtracting the height was defined as the spacer height.
* Width of picture element 130μm

  As in Examples 1 and 2, it was found that the stacking spacer height can be made uniform by forming the stacking spacer on the picture element having the last color order.

1: Color filter substrate 2R, 3R: Red pattern 2G, 3G: Green pattern 2B, 3B: Blue pattern 4: Light shielding layer 5: Laminated spacer

Claims (4)

In a color filter substrate comprising a light shielding layer region in which a light shielding layer is formed on a transparent substrate, a picture element region in which colored layers of a plurality of colors are formed in openings defined by the light shielding layer region, and a spacer. ,
The spacer is formed by laminating a plurality of colored layers in a predetermined shape,
A color filter substrate, wherein the color filter substrate is formed in a light shielding layer region between picture elements composed of a colored layer as an uppermost layer of a spacer.   The spacers are arranged continuously or alternately from the dividing lines in the vertical direction from the dividing line that vertically cuts in the center on the same color picture element (one section of the colored layer area surrounded by the light shielding layer area). The color filter substrate according to claim 1, wherein the color filter substrate is disposed at a distance smaller than ½ of the width, and a difference in height is less than 0.05 μm. On the transparent substrate, a step of forming a light shielding layer having a predetermined pattern having a spacer formation region, a step of forming a colored layer region of a plurality of colors arranged two-dimensionally in a region partitioned by the light shielding layer,
Laminating a colored layer of a plurality of colors three-dimensionally in the spacer formation region of the light shielding layer,
In order to make the height of the spacer uniform, the position where the spacer that is three-dimensionally stacked in the spacer formation region is made to overlap the region of the colored layer to be formed last,
A method of manufacturing a color filter substrate characterized by the above.   A display device using the color filter substrate according to claim 1.