JP2005321495A - Color filter for liquid crystal display device and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a color filter for a liquid crystal display device in which the filter is not peeled off from a transparent and electrically conductive film in a washing process after a photo-spacer is formed, no coloring pixel is crushed to make a gap between substrates uneven and no color irregularity is caused for the liquid crystal display device in a panel assembling process and no color irregularity due to strong local load is caused during utilization, and also to provide the manufacturing method of the color filter. <P>SOLUTION: A stripe-shaped coloring pixel 13RS on a light shielding layer 12 has a through-hole 17 and a photo-spacer 25S is provided to the through-hole. The color filter has through-holes which are formed by extending both of the end parts A of rectangular shaped coloring pixels 13RK that are adjacent to each other on the light shielding layer, and the photo-spacer is arranged in the through-hole. An alignment control protrusion 35 and the photo-spacer are simultaneously formed by using the same material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a color filter used in a liquid crystal display device, and more particularly to a color filter for a liquid crystal display device provided with a photo spacer having a spacer function.

  In the conventional liquid crystal display device technology, transparent spherical particles (beads) of glass or synthetic resin called spacers are dispersed to form a gap between substrates. Since this spacer is a transparent particle, if there is a spacer in the pixel with liquid crystal, light leaks through the spacer during black display, and between the substrates where the liquid crystal material is sealed Due to the presence of the spacer, the alignment of the liquid crystal molecules in the vicinity of the spacer is disturbed, light leakage occurs in this portion, and the contrast is lowered, which adversely affects the display quality.

As a technique for solving such a problem, for example, there is a method in which a photosensitive resin is used and a protrusion having a spacer function is formed at a position of a light shielding layer between pixels by a photofabrication method of partial pattern exposure to development. Proposed.
FIG. 1 is a partial cross-sectional view of a color filter for a liquid crystal display device showing such an example. In FIG. 1, a color filter (10) for a liquid crystal display device has a lattice-shaped light shielding layer (12), a colored pixel (13) having a color filter function, and a transparent conductive film (14) on a transparent substrate (11). A photo spacer (15) as a projection having a spacer function is formed on the transparent conductive film (14) above the lattice-shaped light shielding layer (12).
A number of such photospacers (15) having a horizontal sectional area of the same area and the same height are formed in the plane. Reference numeral (16) represents an opening as a pixel.

FIG. 2 is a partial cross-sectional view of a liquid crystal display device showing an example in which such a color filter (10) for a liquid crystal display device is used in a liquid crystal display device.
In FIG. 2, the liquid crystal display device (50) includes a liquid crystal display device color filter (10) and a counter substrate (20) in which a transparent conductive film (24) is formed on a transparent substrate (21), for example. It is configured.
In such a liquid crystal display device (50), since the photospacer (15) is formed at a position avoiding the inside of the pixel, in addition to the improvement in the contrast, the impact resistance as a liquid crystal display device is obtained. Will be improved.

  In the panel assembling process in which the color filter (10) for the liquid crystal display device and the counter substrate (20) are bonded to form a panel, a seal portion (not shown) is provided at the peripheral portion, With the gap of the counter substrate (20) as parallel as possible, a load is applied between the upper and lower surface plates, and the seal portion and the photo spacer are pressed and bonded.

FIG. 3A is a plan view showing an example of a color filter for a liquid crystal display device provided with a photospacer. This example is an example of a color filter for a liquid crystal display device in which striped colored pixels are formed as colored pixels in the vertical direction in FIG. Moreover, FIG.3 (b) is sectional drawing which expands and shows the YY 'line cross section of (a).
As shown in FIGS. 3A and 3B, this color filter for a liquid crystal display device has a lattice-shaped light shielding layer (12) and a colored pixel (13) having a color filter function on a transparent substrate (11). And a transparent conductive film (14) are sequentially formed, and a photospacer (15S) is formed on the transparent conductive film (14) via the colored pixels (13) above the lattice-shaped light shielding layer (12). It has been done.

This photospacer (15S) is a photospacer when stripe-like colored pixels are formed. The colored pixel (13) is composed of a red striped colored pixel (13RS), a green striped colored pixel (13GS), and a blue striped colored pixel (13BS). In (a), the vertical direction is the stripe length, and red, green, and blue are arranged in this order in the left-right direction. The striped colored pixels of each color located on the opening (16) function as a color filter.
In FIG. 3B, the height (H1) from the surface of the transparent conductive film (14) to the upper end of the photospacer (15S) is the inter-substrate gap when assembled as a panel.

  FIG. 4A is a plan view showing another example of a color filter for a liquid crystal display device provided with a photo spacer. This example is an example of a color filter for a liquid crystal display device in which rectangular colored pixels are formed as colored pixels so as to cover each opening (16) in FIG. 4A. FIG. 4B is an enlarged sectional view taken along the line Y-Y ′ in FIG. As shown in FIGS. 4A and 4B, this color filter for a liquid crystal display device has a lattice-shaped light shielding layer (12) and a colored pixel (13) having a color filter function on a transparent substrate (11). And a transparent conductive film (14) are sequentially formed, and a photospacer (15K) is formed on the lattice-shaped light shielding layer (12) via the transparent conductive film (14).

This photo spacer (15K) is provided on the transparent conductive film (14) without the colored pixel (13), and is a photo spacer when a rectangular colored pixel is formed. The colored pixel (13) is composed of a red rectangular colored pixel (13RK), a green rectangular colored pixel (13GK), and a blue rectangular colored pixel (13BK). The rectangular colored pixels of each color are shown in FIG. In (a), it arrange | positions in order of red, green, and blue in the left-right direction so that each opening part (16) may be covered to an up-down direction.
In FIG. 4B, the height (H2) from the surface of the transparent conductive film (14) to the upper end of the photo spacer (15K) is the inter-substrate gap when assembled as a panel.

The size and shape of the photo spacers (15S, 15K) are rounded rectangles with a horizontal cross section of about 13 × 19 μm, or rounded diamonds with diagonal lengths (20 × 20 μm) to (15 × 15 μm). Many were used.
In recent years, with high definition and high quality of liquid crystal display devices, photo spacers are also required to have a fine size. The size and shape of the liquid crystal display device are circular with a horizontal cross section of about 12 × 12 μm and about 8 × 8 μm. It has changed to a circle.

  However, when the size and shape of the photo spacer becomes smaller than a circle of about 8 × 8 μm, the adhesion with the transparent conductive film is reduced, and the cleaning step, the inspection step, or the liquid crystal display device after forming the photo spacer is reduced. In the cleaning process in the panel assembling process, a part of the photo spacer may be peeled off from the transparent conductive film.

  Further, in the panel assembling process, when a pressure is applied to the color filter for a liquid crystal display device provided with a photo spacer, the load becomes uneven and a locally strong load may be applied. This locally strong load pushes the photo spacer into the colored pixel, and the colored pixel into which the photo spacer is pushed in is destroyed through plastic deformation.

FIG. 5 is a cross-sectional view for explaining such a situation. As shown in FIG. 5, when a strong load indicated by a white thick arrow is applied to the photospacer (15S), the red striped colored pixel (13RS) is crushed, and the photospacer (15S) from the surface of the transparent conductive film (14). ) The height (H1) up to the upper end becomes a height (H3) that is lower by the amount crushed.
This change in height makes the gap between the substrates non-uniform and causes color unevenness in the liquid crystal display device.

Also, when using a liquid crystal display device, if a finger touches the surface of the liquid crystal display device and a strong load is applied locally, the colored pixels into which the photo spacer has been pressed are similarly crushed and local color unevenness occurs. Sometimes.
In order to avoid the occurrence of color unevenness due to a locally strong load during use, it is desired to increase the pressure resistance load associated with the photo spacer.

The phenomenon of color unevenness due to the load occurs in the color filter for liquid crystal display device having the configuration shown in FIG. 3, and does not occur in the color filter for liquid crystal display device having the configuration shown in FIG.
That is, as shown in FIG. 3, the photo spacer (15S) at this time has a lattice-shaped light shielding layer (12), a colored pixel (13), and a transparent conductive film (14) on a transparent substrate (11). This is because they are sequentially formed and formed on the transparent conductive film (14) through the colored pixels (13) above the lattice-shaped light shielding layer (12).

On the other hand, in the configuration shown in FIG. 4, the colored pixel (13) does not exist below the photospacer (15K), and the lattice-shaped light shielding layer (12) is sufficiently hard, and the photospacer (15K) due to the strong load described above. Will not be pushed.
JP 2003-330011 A

  The present invention has been made to solve the above problems, and in a color filter for a liquid crystal display device provided with a photospacer, even if the size and shape of the photospacer is a circle of about 8 × 8 μm. In the cleaning process after the formation of the photospacer, the transparent conductive film is not peeled off, and in the panel assembly process, the colored pixels are crushed to make the gap between the substrates non-uniform, resulting in uneven color in the liquid crystal display device. It is an object of the present invention to provide a color filter for a liquid crystal display device that does not generate color unevenness and the like even when a strong load is applied locally when the liquid crystal display device is used. It is. Another object of the present invention is to provide a method for producing the color filter for a liquid crystal display device.

  The present invention relates to a color filter for a liquid crystal display device in which a lattice-shaped light shielding layer, a stripe colored pixel, a transparent conductive film, and a photospacer are sequentially formed on a transparent substrate. A color filter for a liquid crystal display device having a through hole for a photo spacer, wherein the photo spacer is provided in the through hole.

  The present invention also relates to a color filter for a liquid crystal display device in which a lattice-shaped light shielding layer, a rectangular colored pixel, a transparent conductive film, and a photospacer are sequentially formed on a transparent substrate. A color filter for a liquid crystal display device having a through hole for a photo spacer formed by extending both end portions of shape-colored pixels, and the photo spacer is provided in the through hole.

The present invention also provides a color filter for a liquid crystal display device, wherein the color filter for a liquid crystal display device according to the above invention has an alignment control protrusion.

  The present invention also provides the color filter for a liquid crystal display device according to the above invention, wherein the alignment control protrusion and the photo spacer are formed simultaneously using the same material.

Further, according to the present invention, a grid-like light shielding layer, a stripe colored pixel, a transparent conductive film, and a photospacer are sequentially formed on a transparent substrate, and the stripe colored pixel on the light shielding layer is a through hole for the photospacer. In a method of manufacturing a color filter for a liquid crystal display device having a hole and a photo spacer provided in the through hole, 1) When forming a stripe-shaped colored pixel on a transparent substrate on which a lattice-shaped light shielding layer is formed In addition, a through hole for the photo spacer is formed in the stripe-like colored pixel at the position where the photo spacer is provided on the light shielding layer,
2) forming a transparent conductive film on the entire surface of the transparent substrate in which the through holes are formed;
3) A photo spacer is provided in the through hole via a transparent conductive film,
A color filter manufacturing method for manufacturing a color filter for a liquid crystal display device.

In the present invention, a lattice-shaped light shielding layer, a rectangular colored pixel, a transparent conductive film, and a photospacer are sequentially formed on a transparent substrate, and mutually adjacent end portions of rectangular colored pixels on the light shielding layer. In the method for producing a color filter for a liquid crystal display device, which has a through hole for a photo spacer formed by extending both, and the photo spacer is provided in the through hole.
1) When a rectangular colored pixel is formed on a transparent substrate on which a lattice-shaped light shielding layer is formed, the rectangular colored pixels adjacent to each other on the light shielding layer are arranged at positions where photo spacers are provided on the light shielding layer. Form a through-hole for the photospacer with both ends extended,
2) forming a transparent conductive film on the entire surface of the transparent substrate in which the through holes are formed;
3) A photo spacer is provided in the through hole via a transparent conductive film,
A color filter manufacturing method for manufacturing a color filter for a liquid crystal display device.

  According to the present invention, in the method for producing a color filter for a liquid crystal display device according to the above invention, 3) the liquid crystal display device is characterized in that an alignment control protrusion is provided before or after the photo spacer is provided in the through hole. It is a manufacturing method of a color filter.

  The present invention also provides a method for producing a color filter for a liquid crystal display device according to the above invention, wherein 3) when a photo spacer is provided in the through hole, a photosensitive resin composition for alignment control protrusion is used, and the photo spacer And a protrusion for controlling the alignment are simultaneously formed. A method for manufacturing a color filter for a liquid crystal display device.

  In the present invention, the striped colored pixels on the light shielding layer have through holes for photo spacers, and the photo spacers are provided in the through holes, or the adjacent rectangular colored pixels on the light shielding layer are mutually connected. Since it is a color filter for a liquid crystal display device having a through hole for a photospacer with both ends extended, and the photospacer is provided in this throughhole, the size and shape of the photospacer is approximately 8 Even if it becomes a circle of about 8 μm, it will not be peeled off from the transparent conductive film in the cleaning process after the formation of the photo spacer, and the colored pixels are crushed in the panel assembling process to make the gap between the substrates uneven. Shall not cause color unevenness in the liquid crystal display device, and a locally strong load when the liquid crystal display device is used. A color filter for a liquid crystal display device that does not cause color unevenness even when applied.

  In addition, the present invention provides the color filter for a liquid crystal display device, wherein the color filter for the liquid crystal display device has an alignment control protrusion, or the alignment control protrusion and the photo spacer are formed simultaneously using the same material. As a result, uniform alignment control protrusions can be obtained, or the cost for forming uniform alignment control protrusions can be greatly reduced, and an inexpensive color for liquid crystal display devices provided with photo spacers and alignment control protrusions. It becomes a filter.

Hereinafter, a color filter for a liquid crystal display device according to the present invention will be described in detail based on an embodiment thereof.
FIG. 6A is a cross-sectional view schematically showing a portion of a color filter for a liquid crystal display device according to the present invention provided with a photo spacer. FIG. 6B is a plan view. This part is a part corresponding to the YY ′ line cross section in the example shown in FIG. That is, striped colored pixels are formed as colored pixels in the vertical direction as shown in FIG.

As shown in FIGS. 6 (a) and 6 (b), the color filter for a liquid crystal display device according to the present invention has a lattice-shaped light shielding layer (12), stripe colored pixels (13′RS) on a transparent substrate (11). ), A transparent conductive film (14), and a photospacer (25S) are sequentially formed. The striped colored pixel (13'RS) shown in FIG. 6 is a red striped colored pixel, and the striped colored pixel (13'RS) has a through hole (17) for a photospacer. A photospacer (25S) is provided in the hole (17) through a transparent conductive film.
In FIG. 6A, the height (H4) from the surface of the transparent conductive film (14) to the upper end of the photo spacer (25S) is the inter-substrate gap when assembled as a panel.

In the method of manufacturing the color filter for the liquid crystal display device shown in FIG. 6, first, when the red stripe colored pixels (13′RS) are formed on the transparent substrate on which the lattice-shaped light shielding layer (12) is formed, for example, When the photosensitive resin composition used for forming the red striped colored pixel (13'RS) is negative, a photomask having a light-shielding portion at a portion corresponding to the through hole (17) is used as the photomask. A through-hole (17) for a photospacer is formed at a position where a photospacer of a striped colored pixel on the light shielding layer is provided by exposure through a photomask and development processing.
Next, a transparent conductive film (14) is formed on the entire surface of the transparent substrate on which the through hole (17) is formed, and subsequently, a photo spacer (25S) is provided in the through hole (17) to provide a color for a liquid crystal display device. This is a manufacturing method for manufacturing a filter.

  As shown in FIG. 6, in the color filter for a liquid crystal display device according to the present invention, a photospacer (25S) is a through hole (13'RS) formed in a red striped colored pixel (13'RS) on a light shielding layer (12). 17), the through hole (17) acts as an anchor. Therefore, it does not peel off from the transparent conductive film (14) in the cleaning step after the formation of the photospacer.

Conventionally, for example, an ultrasonic device having a frequency of 40 kHz and 60 W has been used in the cleaning process after the formation of the photospacer. On the red stripe-like colored pixels having no through holes as shown in FIG. Photo spacers with a diameter of 8 μm and a height of about 5 μm provided through a transparent conductive film are peeled off by washing treatment with a water-soluble detergent for 15 minutes and with pure water for about 5 minutes. It was happening.
In the photo spacer (25S) shown in FIG. 6, it is confirmed by the example that the photo spacer is not peeled off under the above conditions.

  Further, in the color filter for a liquid crystal display device according to the present invention shown in FIG. 6, the photospacer (25S) is provided on the hard light-shielding layer (12) without the red striped colored pixel (13'RS). Therefore, in the panel assembling process, the colored pixels are crushed to make the gap between the substrates non-uniform, and the liquid crystal display device does not cause color unevenness. Further, when the liquid crystal display device is used, color unevenness does not occur even when a strong load is applied locally.

  FIG. 7A is a cross-sectional view schematically showing an example of a color filter for a liquid crystal display device according to claim 2. FIG. 7B is a cross-sectional view. This portion corresponds to a cross section taken along line Y-Y ′ in another example shown in FIG. That is, rectangular colored pixels as the colored pixels are formed in the vertical direction so as to cover each opening as shown in FIG.

As shown in FIGS. 7A and 7B, this color filter for a liquid crystal display device has a lattice-shaped light shielding layer (12), a rectangular colored pixel (13′RK), a transparent substrate (11), A transparent conductive film (14) and a photospacer (25K) are sequentially formed.
The rectangular colored pixel (13′RK) shown in FIG. 7 is a red rectangular colored pixel, and the red rectangular colored pixel (13′RK) has a through hole (17) for a photospacer. A photospacer (25K) is provided in the through hole (17) through a transparent conductive film (14).

This through hole (17) is a through hole formed by extending both ends (A) of the red rectangular colored pixels (13RK) adjacent to each other on the light shielding layer (12) shown in FIG. It is. The ends of the portions other than the end portion (A) extended to form the through holes (17) are further extended to each other as shown by reference numeral (18) in FIG. It has become.
In FIG. 7B, the height (H5) from the surface of the transparent conductive film (14) to the upper end of the photospacer (25K) is the inter-substrate gap when assembled as a panel.

In the manufacturing method of the color filter for the liquid crystal display device shown in FIG. 7, first, when the red rectangular colored pixel (13′RK) is formed on the transparent substrate on which the lattice-shaped light shielding layer (12) is formed, for example, When the photosensitive resin composition used to form the red rectangular colored pixel (13′RK) is negative, the portion corresponding to the end (A) so as to form the through hole (17) as a photomask. Using a photomask having a light-shielding portion extending from the light-shielding layer, the end portions of the rectangular colored pixels adjacent to each other on the light-shielding layer at the position where the photospacer on the light-shielding layer is provided by exposure and development processing through the photomask The through-hole (17) for the photo spacer is formed by extending both of the two.
Next, a transparent conductive film (14) is formed on the entire surface of the transparent substrate on which the through hole (17) is formed, and subsequently, a photo spacer (25K) is provided in the through hole (17) to provide a color for a liquid crystal display device. This is a manufacturing method for manufacturing a filter.

  As shown in FIG. 7, in the color filter for a liquid crystal display device according to the present invention, a photo spacer (25K) is a through hole (13'RK) formed in a red rectangular colored pixel (13'RK) on a light shielding layer (12). 17), the through hole (17) acts as an anchor in the same manner as the through hole (17) shown in FIG. Therefore, it does not peel off from the transparent conductive film (14) in the cleaning step after the formation of the photospacer.

In the color filter for a liquid crystal display device shown in FIG. 7, the photo spacer (25K) is originally provided on the hard light-shielding layer (12) without the red stripe colored pixels (13′RK). Therefore, in the panel assembling process, the colored pixels are crushed to make the gap between the substrates non-uniform, and the liquid crystal display device does not cause color unevenness. Further, when the liquid crystal display device is used, color unevenness does not occur even when a strong load is applied locally.

FIG. 8 is an explanatory diagram showing an example of a tapered through hole (17 ′) having a lower diameter smaller than an upper diameter, that is, a side wall of the through hole as a slope.
This tapered through hole (17 ') is formed in a red stripe-shaped colored pixel (13'RS), and a photo spacer (25S) is provided in the tapered through hole (17') to indicate by a white arrow. The stress accompanying the lateral strain generated by the load from above the photospacer (25S) can be dispersed in the red stripe-shaped colored pixel (13'RS), and the withstand pressure load associated with the photospacer becomes strong. .

In addition, the present invention is characterized in that the color filter for a liquid crystal display device has an alignment control protrusion.
In conventional liquid crystal display devices, in order to uniformly align the liquid crystal molecules, polyimide is applied in advance on the transparent conductive film provided on both substrates sandwiching the liquid crystal, and the surface is uniformly rubbed. Process it.
However, in TN type liquid crystal used in many liquid crystal display devices, in principle, it is difficult to obtain a wide viewing angle. In a halftone display state, light leaks at an oblique viewing angle, and the contrast is lowered and displayed. Quality deteriorates. That is, there is a problem that the viewing angle with good contrast is narrow.

  As one technique for solving such a problem, the liquid crystal molecules in one pixel are controlled so that the alignment direction of the liquid crystal molecules is not a single direction but a plurality of directions, and uniform halftone display is performed in a plurality of directions. In other words, an alignment-divided vertical alignment liquid crystal display (MVA, Multi-domain Vertical Alignment-LCD) having a wide viewing angle has been developed.

FIG. 9 explains the principle of this MVA-LCD. In the state at the time of voltage application, as shown by the white arrow, the liquid crystal molecules between the alignment control protrusion (22a) and the alignment control protrusion (23) in one pixel are inclined diagonally to the left in the figure, and the alignment control is performed. The liquid crystal molecules between the protrusions (23) and the alignment control protrusions (22b) are inclined obliquely to the right. That is, the alignment of the liquid crystal molecules is controlled by providing protrusions instead of the rubbing treatment.
In the example shown in FIG. 9, one pixel is divided into two, and the tilt direction of liquid crystal molecules is two in one pixel, and the liquid crystal display device is excellent in viewing angle characteristics.

10A and 10B are an enlarged plan view and a cross-sectional view illustrating one pixel of an example of a color filter used in the MVA-LCD. In this example, the alignment control protrusion (83) is bent 90 ° within one pixel.
FIGS. 11A and 11B are a plan view and a cross-sectional view showing an enlarged view of one pixel of another example. As shown in FIGS. 11A and 11B, another example is a color filter in which an alignment control protrusion 93 having a circular planar shape is formed.
In the liquid crystal display device using such a color filter, when a voltage is applied, the liquid crystal molecules are inclined in an infinite direction, that is, one pixel is divided infinitely, as shown in FIG. Thus, a liquid crystal display device having excellent viewing angle characteristics is obtained.

The cross-sectional shape of the alignment control projection (83) having the planar shape of stripe shape along the line AA ′ is, for example, a triangle or a kamaboko shape, and its width (W2) is about 6 to 20 μm and height (H6). Is about 1.2 to 1.4 μm. Further, the width (W3) and the height (H7) of the alignment control protrusion (93) having a circular planar shape are approximately the same as each of the stripe-shaped alignment control protrusions (83).

FIG. 12 is a cross-sectional view showing an example of a color filter for a liquid crystal display device according to the present invention having alignment control protrusions. This color filter for a liquid crystal display device is the color filter for a liquid crystal display device shown in FIG. 6 according to claim 1 and provided with alignment control projections (35).
A through hole is not provided below the alignment control protrusion (35), but the height (H8) of the alignment control protrusion (35) is about 1.2 to 1.4 μm as described above. Since it is high, it will not be peeled off by the cleaning process after forming the alignment control protrusion.

For the coating liquid used for forming the alignment control protrusions (35), for example, a photosensitive resin composition for alignment control protrusions disclosed in JP-A-2003-330011 is preferably used.
Conventionally, the alignment control protrusions were formed by forming a pattern with a rectangular cross-section using a positive resist and reflowing this rectangular pattern by heat melting to obtain a uniform shape. It is difficult to obtain a simple alignment control protrusion.
The photosensitive resin composition is a photosensitive resin composition containing an alkali-soluble resin, a photopolymerizable monomer, and a photopolymerization initiator as main components. As the alkali-soluble resin, a (meth) acrylic resin is recommended, and as the photopolymerizable monomer, a group of polyfunctional acrylates is recommended. In particular, as the photopolymerization initiator, a thioxanthone photopolymerization initiator is used as an α-aminoketone-based light. It is recommended to use it together with a polymerization initiator. Thereby, it is possible to satisfactorily form the cross-sectional shape of the alignment control projection.

13 (a) to 13 (d) show a method of manufacturing a color filter for a liquid crystal display device according to claim 7, that is, a color filter for a liquid crystal display device provided with alignment control protrusions (35) shown in FIG. It is process drawing explaining an example of this manufacturing method.
In this manufacturing method, as shown in FIG. 13A, first, a grid-like light shielding layer (12), a red stripe colored pixel (13′RS) provided with a through hole, and a transparent conductive film (14). The coating film (30) of the photosensitive resin composition for the alignment control protrusions is provided on the transparent substrate (11) on which is formed.

Next, exposure and development are performed through a photomask (PM1) having a portion corresponding to the alignment control protrusion as a transmission portion, thereby providing alignment control protrusions (35) (FIGS. 13B to 13C). .
Subsequently, a coating film is formed using a photosensitive resin composition for a photospacer, and exposure and development are performed through a photomask (not shown) to provide a photospacer (25S) (FIG. 13 (d)). It is a manufacturing method.

  The invention according to claim 8 is characterized in that when the photo spacer is provided in the through hole, the photo spacer and the alignment control protrusion are formed at the same time by using the photosensitive resin composition for the alignment control protrusion. . That is, the manufacturing of the color filter for a liquid crystal display device shown in FIG. 12 that simultaneously forms the photo spacer (25S) and the alignment control projection (35) of the color filter for the liquid crystal display device provided with the alignment control projection (35). Is the method.

FIG. 14 is a cross-sectional view illustrating an example of a photomask used in the method for manufacturing a color filter for a liquid crystal display device according to an eighth aspect. The photomask (PM2) shown in FIG. 14 includes a pattern part (a) that transmits UV light, a pattern part (b) that transmits semi-transparent light, and a light shielding part (c) that blocks UV light. .
No thin film is formed on the transparent pattern portion (a) on the transparent substrate (31), and the transmissible pattern portion (b) has, for example, a transmittance of i-line with a wavelength of 365 nm of 10% or less. The ITO film (32) is formed, and the ITO film (32) and the chromium film (33) are formed in the light shielding part (c).

A pattern portion (a) that is transmissive is provided corresponding to the portion where the photospacer (25S) is formed, and a pattern portion (b) that is semi-transmissive is provided corresponding to the portion where the alignment control protrusion (35) is formed. Is provided.
Accordingly, as shown by the white thick arrow, the transmitted pattern portion (a) transmits the UV light having the intensity irradiated, and the semi-transmitted pattern portion (b) is attenuated UV as shown by the white thin arrow. Light is transmitted.

FIG. 15 is a process diagram for explaining an example of the manufacturing method according to the eighth aspect.
First, as shown in FIG. 15A, a grid-like light shielding layer (12), a red stripe-like colored pixel (13'RS) provided with a through hole, and a transparent conductive film (14) were formed. On the transparent substrate (11), the coating film (30) of the photosensitive resin composition for the orientation controlling protrusion is provided.
Next, exposure and development are performed through a photomask (PM2) having a portion corresponding to the photospacer as a transmissive portion and a portion corresponding to the alignment control projection as a semitransmissive portion, and the photospacer (25S) and the photospacer are processed. In this manufacturing method, the orientation control projections (35) having a lower height are simultaneously provided (FIGS. 15B to 15C).

  As described above, according to the method for manufacturing a color filter for a liquid crystal display device according to claim 8, the alignment control protrusion (35) is formed in the manufacturing process of forming the photospacer (25S). Therefore, the cost of forming the alignment control protrusion (35) is greatly reduced. That is, a color filter for a liquid crystal display device provided with photo spacers and alignment control protrusions can be manufactured at low cost.

It is a fragmentary sectional view of the color filter for liquid crystal display devices which has a photospacer. It is a fragmentary sectional view of the example of the liquid crystal display device using the color filter for liquid crystal display devices of FIG. (A) is a top view which shows the part of an example of the color filter for liquid crystal display devices provided with the photo spacer. (B) is sectional drawing which expands and shows the Y-Y 'line cross section of (a). (A) is a top view which shows the part of the other example of the color filter for liquid crystal display devices provided with the photo spacer. (B) is sectional drawing which expands and shows the Y-Y 'line cross section of (a). It is sectional drawing explaining the condition where the photo spacer was pushed in. (A) is sectional drawing which showed typically the part of the color filter for liquid crystal display devices by this invention which provided the photo spacer. (B) is a plan view. (A) is sectional drawing which showed typically the part of an example of the color filter for liquid crystal display devices concerning Claim 2. FIG. (B) is a plan view. It is explanatory drawing which shows the example of the taper through hole whose side wall is a slope. This explains the principle of the MVA-LCD. (A) is a top view which expands and shows one pixel of an example of the color filter used for MVA-LCD. FIG. 4B is an enlarged cross-sectional view illustrating one pixel of an example of a color filter used in an MVA-LCD. (A) is a top view which expands and shows one pixel of another example. (B) is sectional drawing which expands and shows one pixel of another example. (C) is explanatory drawing of a viewing angle characteristic. It is sectional drawing which shows an example of the color filter for liquid crystal display devices which has the processus | protrusion for orientation control. (A)-(d) is process drawing explaining the manufacturing method of the color filter for liquid crystal display devices concerning Claim 7. FIG. It is sectional drawing explaining an example of the photomask used in the manufacturing method of the color filter for liquid crystal display devices concerning Claim 8. (A)-(c) is process drawing explaining the manufacturing method of the color filter for liquid crystal display devices concerning Claim 8. FIG.

Explanation of symbols

7, 10... Color filters 11, 21, 31, 40 for the liquid crystal display device having photo spacers, transparent substrates 12, 41, light shielding layers 13, 42, colored pixels 13 Rs, red Striped colored pixel 13GS ... Green striped colored pixel 13BS ... Blue striped colored pixel 13RK ... Red rectangular colored pixel 13GK ... Green rectangular colored pixel 13BK ... Blue Rectangular colored pixel 13'RS ... Red stripe colored pixel 13'RK with through-hole Red rectangular colored pixel 14, 24, 43 ... with transparent hole 15 ... Photo spacer 15S: Photo spacer 15K when stripe colored pixels are formed Photo spacer 16 when rectangular colored pixels are formed ··· Opening 17 ··· through hole 17 '··· Tapered · or through hole 18 · · · border 20 where adjacent red rectangular colored pixels are extended from each other · · · opposing substrates 22a, 22b, 23, 35, 83, 93... Orientation control protrusion 25S... Photo spacer when stripe colored pixel in the present invention is formed 25K... Photo when rectangular colored pixel in the present invention is formed Spacer 27... Liquid crystal molecule 30... Coating film 32 of photosensitive resin composition for alignment control protrusion... ITO film 33... Chromium film 50 and 80. Mutual ends H1 of adjacent red rectangular colored pixels... Gap between substrates in color filter for liquid crystal display device in FIG. 3... Gap between substrates in color filter for liquid crystal display device in FIG. 3 ... Gap between substrates H4 in which photo spacers are crushed in the color filter for liquid crystal display device in FIG. 5 ... Gap between substrates H5 in the color filter for liquid crystal display device in FIG. 6 ... Liquid crystal display device in FIG. Inter-substrate gap H6 in the color filter for use H ... height of the stripe-shaped alignment control protrusion H7 ... height of the circular alignment control protrusion H8 ... height PM1 of the alignment control protrusion in the present invention ... photomask PM2 according to claim 7 ... photomask W2 according to claim 8 ... width W3 of the stripe-shaped alignment control protrusion ... width of the circular alignment control protrusion a ... Pattern portion b through which UV light is transmitted: Pattern portion c through which UV light is semi-transmitted: Light shielding portion where UV light is shielded

Claims (8)

  In a color filter for a liquid crystal display device in which a lattice-like light shielding layer, a stripe colored pixel, a transparent conductive film, and a photo spacer are sequentially formed on a transparent substrate, the stripe colored pixel on the light shielding layer is used for a photo spacer. A color filter for a liquid crystal display device, comprising a through hole, wherein a photo spacer is provided in the through hole.   In a color filter for a liquid crystal display device in which a lattice-shaped light shielding layer, a rectangular colored pixel, a transparent conductive film, and a photospacer are sequentially formed on a transparent substrate, mutual mutual contact between rectangular colored pixels adjacent on the light shielding layer A color filter for a liquid crystal display device, comprising a through hole for a photospacer having both ends extended, and the photospacer is provided in the through hole.   3. The color filter for a liquid crystal display device according to claim 1, wherein the color filter for a liquid crystal display device has an alignment control protrusion.   4. The color filter for a liquid crystal display device according to claim 3, wherein the alignment control protrusion and the photo spacer are formed simultaneously using the same material. On the transparent substrate, a lattice-shaped light shielding layer, a stripe colored pixel, a transparent conductive film, and a photo spacer are sequentially formed, and the stripe colored pixel on the light shielding layer has a through hole for the photo spacer, In the method of manufacturing a color filter for a liquid crystal display device in which a photo spacer is provided in the through hole,
1) When forming a striped colored pixel on a transparent substrate on which a lattice-shaped light shielding layer is formed, a through hole for the photospacer is formed in the striped colored pixel at a position where the photo spacer is provided on the light shielding layer. And
2) forming a transparent conductive film on the entire surface of the transparent substrate in which the through holes are formed;
3) A photo spacer is provided in the through hole via a transparent conductive film,
A method for producing a color filter for a liquid crystal display device, comprising producing a color filter. A lattice-shaped light shielding layer, rectangular colored pixels, a transparent conductive film, and a photospacer are sequentially formed on a transparent substrate, and both end portions of adjacent rectangular colored pixels are extended on the light shielding layer. In the method of manufacturing a color filter for a liquid crystal display device having a through hole for a photo spacer, and the photo spacer is provided in the through hole,
1) When a rectangular colored pixel is formed on a transparent substrate on which a lattice-shaped light shielding layer is formed, the rectangular colored pixels adjacent to each other on the light shielding layer are arranged at positions where photo spacers are provided on the light shielding layer. Form a through-hole for the photospacer with both ends extended,
2) forming a transparent conductive film on the entire surface of the transparent substrate in which the through holes are formed;
3) A photo spacer is provided in the through hole via a transparent conductive film,
A method for producing a color filter for a liquid crystal display device, comprising producing a color filter.   (3) The method for producing a color filter for a liquid crystal display device according to (5) or (6), wherein an alignment control protrusion is provided before or after the photo spacer is provided in the through hole.   (3) The photospacer and the alignment control protrusion are simultaneously formed using the photosensitive resin composition for the alignment control protrusion when the photospacer is provided in the through hole. 7. A method for producing a color filter for a liquid crystal display device according to 6.

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