JP2011053553A - Liquid crystal display device, and method of manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device of a color filter-on array system having a coloring section of two or more colors that further reduces the step of an alignment layer than before and prevents deformation of a spacer formed in a contact hole. <P>SOLUTION: This liquid crystal display device includes an optically transparent first substrate 10, an optically transparent second substrate 20 facing one main surface of the first substrate 10, and a liquid crystal layer 30 held in a gap between the first substrate 10 and the second substrate 20. The first substrate 10 includes an optically transparent insulating substrate SUB, a first coloring section 13G having a tapered first end face 13Gb, and a second coloring section 13B having a tapered second end face 13Bg. The first end face 13Gb and the second end face 13Bg are arranged on the insulating substrate SUB so that they overlap each other in the thickness direction of the first substrate 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a color filter on array type liquid crystal display device having two or more colored portions and a method for manufacturing the liquid crystal display device.

  A color filter-on-array liquid crystal display device includes a color filter provided on an array substrate, and is configured by holding a liquid crystal layer between one main surface holding the color filter of the array substrate and a counter substrate. The As a color filter, what consists of a colored part of three colors of red, green, and blue is common.

  The colored portion is formed separately for each color by photolithography. If the colored portion is formed so as to deviate from a predetermined position, light may be transmitted through the gap between the colored portions. In order to prevent this, the adjacent colored portions are arranged so that the outer edges overlap.

  However, since the overlapping portion of the colored portion is thicker than the non-overlapping portion, there is a step in the alignment film provided in the upper layer of the color filter. In some cases, the alignment of the liquid crystal molecules contained in the liquid crystal layer is disturbed by the step of the alignment film.

  In recent years, a liquid crystal panel has been disclosed in which the surface step in each pixel, such as the step of the color filter layer overlapping portion or the step due to the light shielding layer on the switching element, is reduced, and the angle formed between the inclined portion of the step and the substrate surface is reduced. (For example, refer to Patent Document 1).

  In addition, when a spacer is formed in the upper layer of the contact hole that connects the pixel electrode provided in the upper layer of the color filter and the wiring layer provided in the lower layer of the color filter, the spacer is deformed in the firing process and is lower than the desired height. There was a case. In that case, when the pressing force is applied, the strength decreases, and when the amount of deformation of the substrate by the pressing force increases, the orientation of the liquid crystal molecules contained in the liquid crystal layer is disturbed, and the display quality may deteriorate.

JP 2002-357828 A

  Accordingly, the present invention has been made to solve the above-described problems, avoids disturbance of the alignment of the liquid crystal molecules contained in the liquid crystal layer, and has a good display quality and a method for manufacturing the liquid crystal display device The purpose is to provide.

  A liquid crystal display device according to an aspect of the present invention includes a light transmissive first substrate, a light transmissive second substrate facing one main surface of the first substrate, the first substrate, and the first substrate. A liquid crystal layer held in a gap with the two substrates, wherein the first substrate is a light-transmissive insulating substrate, a first coloring portion having a tapered first end surface, and a reverse taper. A second colored portion having a second end surface in a shape, and in the upper layer of the insulating substrate, the first end surface and the second end surface overlap in the thickness direction of the first substrate. It is characterized by being arranged in.

  The method for manufacturing a liquid crystal display device according to an aspect of the present invention includes a step of applying a first pigment on an upper layer of a light-transmitting insulating substrate having a wiring layer, and a step of pattern-exposing the first pigment. A paddle development process in which a portion unnecessary for pattern formation of the first pigment is removed by paddle development, and an end surface of the portion necessary for pattern formation is eroded by a developer so as to be 15 μm or more; and the first pigment Baked to form a first colored portion, a step of applying the second pigment to the first colored portion and the upper layer of the insulating substrate, and a part of the second pigment, Exposing to a pattern that overlaps the end face eroded by the developer of the first colored portion, removing a portion unnecessary for pattern formation of the second pigment by paddle development, and the second The pigment is calcined and second A step of forming a colored portion, a step of causing the second substrate to face the alignment film with a gap, and a step of injecting a liquid crystal layer into the gap between the first substrate and the second substrate. It is characterized by having.

  ADVANTAGE OF THE INVENTION According to this invention, it can avoid that the orientation of the liquid crystal molecule contained in a liquid-crystal layer is disturb | confused, and can obtain the manufacturing method of a liquid crystal display device with a favorable display quality, and a liquid crystal display device.

FIG. 1 is a perspective view of a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is an enlarged view of an example of a cross section taken along line II-II shown in FIG. FIG. 3 is an enlarged view showing a configuration example of the array substrate in the broken-line circle III shown in FIG. It is an enlarged view which shows one structural example of a pixel electrode. It is a partial cross section enlarged view which shows an example of the mode after colored part formation. It is an enlarged view which shows an example of the mode before baking of a green coloring part. It is an enlarged view which shows an example of the mode after baking of a green coloring part. It is an enlarged view which shows an example of the mode before baking of a blue coloring part. It is an enlarged view which shows an example of the mode after baking of a blue coloring part. It is a cross-sectional enlarged view which shows an example of the mode of the spacer formed in the contact hole of the green coloring part. It is an expanded sectional view which shows an example of the mode of the spacer before the heating formed in the contact hole of the conventional green coloring part.

  Hereinafter, a liquid crystal display device and a method of manufacturing the liquid crystal display device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing a liquid crystal display device according to the present embodiment.

  As shown in FIG. 1, the liquid crystal display device 1 includes a substantially rectangular flat array substrate 10 (first substrate), a counter substrate 20 (second substrate) facing one main surface of the array substrate 10, The liquid crystal layer 30 is held between the array substrate 10 and the counter substrate 20. A circuit board 60 is provided on one side of the array substrate 10.

  FIG. 2 is an enlarged view of an example of a cross section taken along line II-II in FIG.

    As shown in FIG. 2, the array substrate 10 and the counter substrate 20 are bonded together by a seal material 31 disposed in the peripheral portion of the counter surface. A light shielding layer 40 is provided along the sealing material 31 inside the sealing material 31. Columnar spacers 16a and 16b are interposed between the array substrate 10 and the counter substrate 20, and the liquid crystal layer 30 is accommodated in a gap formed by the spacers 16a and 16b.

  For the sealing material 31, for example, a resin such as photocuring property or thermosetting property is used. For the light shielding layer 40, for example, a black resin is used.

  The array substrate 10 includes a transparent insulating substrate SUB such as glass. On one main surface of the insulating substrate SUB facing the counter substrate 20, the first interlayer film 11, the wiring layer 12, the coloring layer 13, the second interlayer film 14, and the pixel electrode 17 are aligned in order from the side close to the insulating substrate SUB. The film 18 is laminated.

  The first interlayer film 11 is provided so as to cover the insulating substrate SUB. As the first interlayer film 11, a transparent insulating oxide film is used.

  A colored layer 13 is provided in an inner region surrounded by the light shielding layer 40 on the wiring layer 12. The colored layer 13 is configured by periodically arranging three-color substantially rectangular colored portions (a red colored portion 13R, a green colored portion 13G, and a blue colored portion 13B). A second interlayer film 14 is provided on the colored layer 13. In the present embodiment, the same transparent insulating material as that of the first interlayer film 11 is used for the second interlayer film 14.

  A contact hole 15 penetrating the colored layer 13 and the second interlayer film 14 is formed in the colored layer 13 and the second interlayer film 14. One contact hole 15 is provided for each colored portion 13R, 13G, 13B.

  On the second interlayer film 14, a plurality of pixel electrodes 17 are arranged at intervals. One pixel electrode 17 is arranged for each colored portion 13R, 13G, 13B of the lower colored layer 13 one by one. The pixel electrode 17 covers the contact hole 15, contacts the gate line 12 </ b> G of the wiring layer 12 through the contact hole 15, and is electrically connected.

  FIG. 3 is an enlarged view showing the array substrate in the broken-line circle III of the liquid crystal display device of FIG.

    As shown in FIG. 3, an alignment film 18 is provided inside the insulating substrate SUB. The wiring layer 12 below the alignment film 18 includes a plurality of gate lines 12G and a plurality of source lines 12S. The gate line 12G is substantially parallel to the Y direction along one side of the insulating substrate SUB. The source line 12S is substantially parallel to the X direction along one side of the insulating substrate SUB that is substantially perpendicular to the Y direction.

  That is, the gate line 12G and the source line 12S are formed in a lattice shape so as to be orthogonal to each other. For the gate line 12G and the source line 12S, for example, a metal such as aluminum or molybdenum is used.

  One pixel electrode 17 is arranged in each section divided by the gate line 12G and the source line 12S. A part of the pixel electrode 17 overlaps a part of the gate line 12G. The pixel electrode 17 provided in the upper layer of the wiring layer 12 and the contact hole 15 formed in the second interlayer film 14 are substantially rectangular. The pixel electrode 17 and the contact hole 15 that overlap a part of the gate line 12G are arranged on the upper layer of the gate line 12G so that the center is located in the center of the region between the two source lines 12S. ing.

  FIG. 4 is an enlarged view showing the pixel electrode.

    As shown in FIG. 4, the pixel electrode 17 is a large substantially covering region where light is transmitted surrounded by the contact portion 17 </ b> A which is a small substantially rectangular portion covering the contact hole 15 and the gate line 12 </ b> G and the source line 12 </ b> S. The light-transmitting portion 17B, which is a rectangular portion, has a convex shape. The pixel electrode 17 is formed of a transparent electrode such as indium tin oxide (ITO).

  On the other hand, as shown in FIG. 3, the counter substrate 20 is provided with a counter electrode 27 formed of a transparent electrode on one main surface facing the array substrate 10. The counter electrode 27 is formed of a transparent electrode such as ITO similarly to the pixel electrode.

  A polarizing plate 50 a is disposed on the other main surface side of the one main surface that holds the liquid crystal layer 30 of the array substrate 10. Further, a polarizing plate 50 b is disposed on the other main surface side with respect to one main surface holding the liquid crystal layer 30 of the counter substrate 20.

  On the alignment film 18 of the array substrate 10, two types of columnar spacers (first spacer 16a and second spacer 16b), which are formed of a transparent resin by a photolithography method, are evenly spaced at a constant interval. Has been placed.

  The first spacer 16 a is provided on the alignment film 18 that is an upper layer of the gate line 12 </ b> G and on a gap between the pixel electrodes 17. That is, the first spacer 16a is disposed in the upper layer of the gap between the contact portions 17A of the pixel electrode 17 in the lower layer. The top surface 16aT of the first spacer 16a is in contact with the counter electrode 27 of the counter substrate 20, and the array substrate 10 and the counter substrate 20 are held at a uniform interval by the first spacer 16a. The height of the first spacer 16a from the alignment film 18 (the width from the surface of the alignment film 18 at the position where the first spacer 16a is disposed to the top surface 16aT in the thickness direction of the array substrate 10) is 4 μm. It is.

  The second spacer 16 b is disposed on the alignment film 18 disposed in the upper layer of the contact hole 15. The second spacer 16b prevents the space between the array substrate 10 and the counter substrate 20 from being narrowed when the array substrate 10 or the counter substrate 20 is pressed, and the top surface of the second spacer 16b. There is a gap between 16 bT and the counter electrode 27 of the counter substrate 20. The second spacer 16b will be described in detail later.

  The state of the colored portions 13R, 13G, and 13B of the colored layer 13 will be described with reference to FIG. FIG. 5 is an enlarged partial cross-sectional view showing a state after the colored portion is formed. On the wiring layer 12 of the array substrate 10, a red colored portion 13R, a green colored portion 13G, and a blue colored portion 13B are arranged in this order.

  In the green colored portion 13G (first colored portion), both the end surface 13Gr in contact with the red colored portion 13R and the end surface 13Gb (first end surface) in contact with the blue colored portion 13B (second colored portion) are tapered. That is, the green colored portion 13G is formed so that the width in the W direction decreases as the distance from the wiring layer 12 increases.

  The blue colored portion 13B has an end surface 13Bg (second end surface) in contact with the green colored portion 13G having an inversely tapered shape, and an end surface 13Br in contact with the red colored portion 13R is tapered. In the red colored portion 13R, both the end surface 13Rg in contact with the green colored portion 13G and the end surface 13Rb in contact with the blue colored portion 13B are inversely tapered. That is, the red colored portion 13R is formed so that the width in the W direction increases as the distance from the wiring layer 12 increases.

  The angle θ (taper angle) formed by the boundary between the colored portions 13R, 13G, and 13B and the insulating substrate SUB surface of the array substrate 10 is 13 degrees.

  The overlapping portions of the colored portions 13R, 13G, and 13B in the thickness direction of the array substrate 10 (direction substantially parallel to the length H) are thicker than the single colored portions 13R, 13G, and 13B. . In this embodiment, the thickness of the colored portions 13R, 13G, and 13B is 3.5 μm, and the thickness of the overlapping portion of the colored portions 13R, 13G, and 13B (the sum of the thicknesses of the two colored portions) Is 4.0 μm. Further, the length of the overlapping portion of the colored portions 13R, 13G, and 13B in the direction parallel to one main surface of the array substrate 10 (the length W2 in the W direction shown in FIG. 5) is 18 μm.

  A method of forming such colored portions 13R, 13G, and 13B will be described with reference to FIGS. 6A and 6B. FIG. 6A is an enlarged view showing a state of the green colored portion before firing. FIG. 6B is an enlarged view showing a state after firing the green colored portion.

  First, in the upper layer of the insulating substrate SUS of the array substrate 10, a green pigment (first pigment) that is a material of the green coloring portion 13G is applied on the wiring layer 12. Next, it exposes using the mask in which the pattern of the green coloring part 13G was given. Thereafter, green pigment unnecessary for pattern formation is removed by paddle development.

  The paddle development is a method in which a developer is applied to the surface of the array substrate 10 coated with a green pigment, and development is performed with a thin developer film uniformly stretched over the entire array substrate 10. In the paddle development, the developer does not flow while remaining on the array substrate 10. Therefore, if the developer is retained on the array substrate 10 for a certain period of time, only the portion unnecessary for forming the green pigment pattern is removed. In addition, the end face of the part necessary for the pattern is also eroded. This erosion progresses most rapidly near the middle of the green colored portion. Accordingly, as shown in FIG. 6A, a green colored portion 13G having a concave end surface is formed.

  Thereafter, the developer is washed away with a rinse solution, and the array substrate is baked to evaporate the rinse solution. Firing is performed at 100 to 150 degrees. Due to this heat, the end face of the green colored portion 13G hangs down on the array substrate 10, and a tapered green colored portion 13G as shown in FIG. 6B is formed.

  Subsequently, the blue colored portion 13B is formed in the same procedure as the green colored portion 13G. FIG. 7A is an enlarged view showing a state of the blue colored portion before firing. FIG. 7B is an enlarged view showing the blue colored portion after firing.

  A blue pigment (second pigment) serving as a material for the blue coloring portion 13B is applied on the insulating substrate SUS of the array substrate 10 so as to cover the wiring layer 12 and the green coloring portion 13G. At this time, the blue pigment on the wiring layer 12 is applied thicker than the blue pigment on the green colored portion 13G. This is because the blue pigment on the green colored portion 13G hangs down on the wiring layer 12. Since the blue pigment has viscosity, not all of the blue pigment flows on the wiring layer 12, and some blue pigment remains on the green colored portion 13G.

  Subsequently, a blue colored portion 13B is formed next to the green colored portion 13G by exposure and paddle development. The end surface 13Bg on the green coloring portion 13G side of the blue coloring portion 13B overlaps the end surface 13Gb of the green coloring portion 13G in the thickness direction of the array substrate 10 as shown in FIG. 7A. The height of the overlapping portion of the end surface 13Bg of the blue coloring portion 13B and the end surface 13Gb of the green coloring portion 13G from one main surface of the insulating substrate SUB is slightly higher than the height of only the green coloring portion 13G other than the overlapping portion. It has become.

  The end face 13Br opposite to the end face 13Bg overlapping the green colored part 13G of the blue colored part 13B is concave after the paddle development. When such a blue colored portion 13B is baked, the end face 13Br drips down due to the applied heat and becomes tapered as shown in FIG. 7B.

  Similarly, the red colored portion 13R is provided between the green colored portion 13G and the blue colored portion 13B. The state after the red colored portion 13R is formed is as shown in FIG. Regarding the red colored portion 13R, in the thickness direction of the array substrate 10, the end surface 13Rg overlaps the end surface 13Gr of the green colored portion 13G, and the opposite end surface 13Rb overlaps the end surface 13Br of the blue colored portion 13B.

  According to paddle development, the developer erodes toward the center of the colored portions 13G and 13B according to the development time. When the developing time is set longer, the developer erodes and the tapered portions of the end surfaces 13Gr and 13Gb of the green colored portion 13G and the end surface 13Br of the blue colored portion 13B can be lengthened.

  Therefore, if the development time is set long, the end faces 13Gr and 13Gb of the green colored portion 13G after baking and the end face 13Br of the blue colored portion 13B can be formed in a gentle slope with a small angle θ. The height of the swell of the overlapping portion between 13G and 13B can be reduced.

  In this way, according to the paddle development, the degree of erosion of the developer can be adjusted by adjusting the development time. Therefore, unlike the conventional shower development, the eroded length of the colored portion 13B, that is, the first The length of the tapered end portion 13BT in the direction substantially parallel to one main surface of the substrate can be 15 μm or more. By setting the length of the tapered end portion 13BT to 15 μm or more, the taper angle θ can be made sufficiently small. Note that the length of the tapered end portion 13BT is desirably adjusted to an appropriate length according to the thickness of the colored portion.

  In this embodiment, since the thickness of the colored portion is 3.5 μm, the angle θ is approximately 13 degrees.

  For example, with respect to the end face 13Gb of the green colored portion 13G, the smaller the angle θ, the lower the height of the bulge of the blue colored portion 13B applied on top of this. This is because the blue pigment forming the blue colored portion 13B is a low viscosity liquid.

  Further, since the blue pigment has viscosity, it has a property of staying on the green colored portion 13G. Therefore, it is avoided that the green coloring portion 13G and the blue coloring portion 13B overlap in the thickness direction of the array substrate 10 and a gap is generated between the green coloring portion 13G and the blue coloring portion 13B.

  Here, when the inclination of the end face 13Gb of the green colored portion 13G is gentle (the angle θ is small), the blue pigment is not a tapered flat portion where the height of the green colored portion 13G is high (in FIG. 5). It tends to flow to the wiring layer 12 from the shown portion W1) along the slope of the end face 13Gb. Conversely, when the slope of the end face 13Gb of the green colored portion 13G is steep (the angle θ is large), the surface tension acts at the boundary between the height of the colored portion 13G and the slope of the end face 13Gb. 12 is difficult to flow. Therefore, the smaller the angle θ, the easier the blue pigment flows to the wiring layer 12, so that the blue pigment on the green colored portion 13G becomes thinner, and as a result, the rise of the overlapping portion between the green colored portion 13G and the blue colored portion 13B is small. Become.

  Thus, the smaller the angle θ, the less the bulge of the overlapping portions of the colored portions 13R, 13G, 13B. Therefore, according to the liquid crystal display device and the method for manufacturing the liquid crystal display device according to the present embodiment, the step of the colored layer 13 can be reduced and the surface of the colored layer 13 can be made smoother than before. The step of the alignment film 18 on the upper layer 13 can be reduced. As a result, the display quality can be improved by suppressing the disorder of the alignment of the liquid crystal molecules of the liquid crystal layer 30 caused by the step of the alignment film 18. If there is a step, a step of polishing the colored layer 13 is necessary. However, in the present embodiment, the step of the colored layer 13 is small, so that polishing is not necessary.

  Next, the second spacer 16b formed in the upper layer of the contact hole 15 will be described in detail with reference to FIG. FIG. 8 is an enlarged cross-sectional view showing a state of the second spacer formed in the contact hole of the green colored portion. Since the end surface 13GE of the green colored portion 13G surrounding the contact hole 15 is also eroded by the developer in the development process, it is tapered similarly to the end surfaces 13Gr and 13Gb overlapping the red colored portion 13R and the blue colored portion 13B.

  The angle (taper angle) formed by the end surface 13GE surrounding the contact hole 15 of the green colored portion 13G with the array substrate 10 is approximately 13 degrees. The length of the end face 13GE of the green colored portion 13G in the direction parallel to the substrate is 18 μm. When the length of the tapered end portion 13BT is 15 μm or more, the angle θ of the taper angle can be made sufficiently small, and the height of the raised portion of the overlapping portion between the colored portions 13R, 13G, 13B can be reduced. it can.

  The pixel electrode 17 and the alignment film 18 provided on the contact hole 15 have a tapered side surface and a bottom portion surrounded by the side surface. That is, the alignment film 18 includes a bottom portion 18B disposed in the upper layer of the contact hole 15 and an end surface 18E disposed on the end portions of the colored portions 13R, 13G, and 13B that border the contact hole 15. A second spacer 16b is provided on a part of the bottom 18B and the end face 18E of the alignment film 18.

  The height of the bottom 18B of the alignment film 18 on the contact hole 15 from one main surface of the insulating substrate SUB is lower than the height of the alignment film 18 disposed on the upper layer other than the contact hole 15. This height difference (length h shown in FIG. 8) is 0.3 μm.

  The height of the second spacer 16b from the bottom 18B of the alignment film 18 on the contact hole 15 (length H shown in FIG. 8) is 6.7 μm. Since the height of the first spacer 16a from the alignment film 18 is 4 μm, the difference in height between the first spacer 16a and the second spacer 16b is 0.3 μm.

  The second spacer 16b is formed by the same transparent resin as the first spacer 16a by photolithography, but the resin forming the second spacer 16b is melted because a heating process is performed at the time of formation. The shape of the second spacer 16b may collapse. However, in this embodiment, since the second spacer 16b is formed so as to partially overlap the end face 18E of the alignment film 18, the outer edge of the base of the second spacer 16b is raised, so that the second Even if the resin of the spacer 16b melts and hangs down on the alignment film 18, the melted resin is blocked by the end face 18E of the alignment film 18. Therefore, the melted resin is difficult to spread on the alignment film 18.

  In the conventional liquid crystal display device, the coloring portion 113 is developed not by paddle development but by shower development. Therefore, the end surface 113GT of the green colored portion 113G surrounding the contact hole is not tapered and is substantially perpendicular to the insulating substrate SUB of the array substrate 110. When the end portion 113Gb of the green coloring portion 113G and the end portion 113Bg of the blue coloring portion 113B are overlapped, the thickness of the overlapping portion may be thicker than the green coloring portion 113G that does not overlap the blue coloring portion 113B. is there.

  Further, the side surfaces of the pixel electrode 117 and the alignment film 118 on the contact hole are steeper with respect to the insulating substrate SUB of the array substrate 110 than the side surfaces of the pixel electrode 17 and the alignment film 18 shown in FIG. A second spacer 116 b is provided on the bottom portion 118 </ b> B surrounded by the end face 118 </ b> E of the alignment film 118. When the resin forming the second spacer 116b is melted by heating, the resin spreads to the bottom 118B of the alignment film 118. For this reason, the height of the second spacer 116b may be reduced, or the area of the top surface 116bT of the second spacer 116b may be reduced.

  However, in this embodiment, since the end surface 13GT of the green coloring portion 13G is tapered, the thickness of the overlapping portion between the end portion 13Gb of the green coloring portion 13G and the end portion 13Bg of the blue coloring portion 13B is set. Can be reduced.

  In addition, since the end face 18E of the alignment film 18 on the contact hole 15 is tapered, the resin of the second spacer 16b is prevented from spreading during firing, so that the height of the second spacer 16b is increased. It is possible to prevent the height and the area of the top surface 16bT of the second spacer 16b from being reduced.

  Thus, according to this embodiment, even if the array substrate 10 or the counter substrate 20 is pressed, the interval between the liquid crystal layers 30 does not become narrower than the height of the second spacer 16b. Therefore, there is no concern that the pressing causes ripples in the display area and deteriorates the appearance.

  In addition, if paddle development is employed, unlike the development by shower, the development surface can be uniformly developed, so that uneven development is unlikely to occur.

  In this embodiment, the colored layer 13 is formed in the order of the green colored portion 13G, the blue colored portion 13B, and the red colored portion 13R. However, the order of forming the colored portions 13R, 13G, and 13B is not limited to this. However, the material forming the green colored portion 13G may contain a component that adversely affects the behavior of the liquid crystal molecules of the liquid crystal layer 30 and the like. In such a case, the green colored portion 13G is formed first so that the end faces 13Gr and 13Gb of the green colored portion 13G are covered with the red colored portion 13R and the blue colored portion 13B, and the red colored portion 13R and blue When the area on the liquid crystal layer 30 side is made smaller than the colored portion 13B, there is less concern that the liquid crystal layer 30 will be adversely affected.

  With the above-described configuration and manufacturing method, according to this embodiment, the step of the alignment film can be further reduced than before, and the deformation of the spacer formed in the contact hole can be prevented, so that the display quality is good. In addition, a color filter on array type liquid crystal display device having two or more colored portions can be obtained.

  That is, according to the liquid crystal display device and the method of manufacturing the liquid crystal display device according to the present embodiment, the liquid crystal display device and the liquid crystal display device with good display quality can be avoided by avoiding the disorder of the alignment of the liquid crystal molecules contained in the liquid crystal layer. The manufacturing method can be obtained.

  In addition, this invention is not limited to the said embodiment itself, In the stage of implementation, it can change and implement a component within the range which does not deviate from the summary.

  Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 10 Array substrate 11 1st interlayer film 12 Wiring layer 13 Colored layer 13R Red colored part 13G Green colored part 13GT Top surface 13B of green colored part Blue colored part 14 Second interlayer film 15 Contact hole 16a First spacer 16b Second spacer 17 Pixel electrode 18 Alignment film 20 Counter substrate 27 Counter electrode 30 Liquid crystal layer 31 Sealing material 40 Light blocking layer 41 Layered resin member 42 Columnar resin member 50 Polarizing plate 60 Circuit substrate SUB Insulating substrate

Claims (5)

A light-transmissive first substrate;
A light transmissive second substrate facing one major surface of the first substrate;
A liquid crystal layer held in a gap between the first substrate and the second substrate,
The first substrate includes a light-transmissive insulating substrate, a first colored portion having a tapered first end surface, and a second colored portion having a reverse tapered second end surface. ,
A liquid crystal display device, wherein the first end face and the second end face are arranged so as to overlap each other in the thickness direction of the first substrate in an upper layer of the insulating substrate. The first substrate includes a wiring layer disposed under the first colored portion and the second colored portion;
A pixel electrode covering the first colored portion and the second colored portion;
An alignment film covering the pixel electrode;
A contact hole provided so as to penetrate each of the first colored portion and the second colored portion, and for contacting the pixel electrode and the wiring layer;
A spacer provided on the alignment film at a position where the contact hole is provided;
With
The end of the first colored portion and the end of the second colored portion that border the contact hole are tapered, and the spacer is partially disposed on the end of the colored portion. A liquid crystal display device provided so as to cover a part of the alignment film.   The tapered end portions of the first colored portion and the second colored portion have a length in a direction in which a height parallel to the one principal surface changes is 15 μm or more. The liquid crystal display device according to claim 1. Applying a first pigment to an upper layer of a light-transmissive insulating substrate having a wiring layer;
Pattern exposure of the first pigment;
A paddle development process in which a portion unnecessary for pattern formation of the first pigment is removed by paddle development, and an end surface of the portion necessary for pattern formation is eroded by a developer so as to be 15 μm or more;
Baking the first pigment to form a first colored portion;
Applying the second pigment to the first colored portion and the upper layer of the insulating substrate;
Exposing the second pigment to a pattern that partially overlaps the end face eroded by the developer of the first colored portion;
Removing a portion unnecessary for pattern formation of the second pigment by paddle development;
Baking the second pigment to form a second colored portion;
A step of causing the second substrate to face the alignment film with a gap;
Injecting a liquid crystal layer into a gap between the first substrate and the second substrate;
A method for manufacturing a liquid crystal display device, comprising: After the step of forming the second colored layer and before the paddle development step,
Forming a pixel electrode on the first colored portion and the second colored portion;
Providing an alignment film on the pixel electrode;
Forming a contact hole for connecting the wiring layer and the pixel electrode in each of the first colored portion and the second colored portion;
Forming a spacer on the alignment film disposed in an upper layer of a part of an end of the first colored portion or the second colored portion that borders the contact hole and the contact hole. The method of manufacturing a liquid crystal display device according to claim 4.

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