TWI386689B - Color filter substrate and fabricating method thereof - Google Patents

Description

Color filter substrate and method of manufacturing same

The present invention relates to a color filter substrate, and more particularly to a method of fabricating a color filter substrate.

Since liquid crystal display (LCD) has advantages such as low voltage operation, no radiation scattering, light weight, and small size, which cannot be achieved by conventional cathode ray tube (CRT) displays, it has become a recent The main subject of display research is constantly moving towards colorization.

The color filter can be used to make a full color display of the liquid crystal display. In recent years, various methods of forming color filters using inkjet printing have been developed. The inkjet printing process forms a black matrix on the substrate to define a plurality of pixel regions. Then, an inkjet printing process is performed to inject color pigments (red, green, blue) into the pixel regions defined by the black matrix. Next, a thermal baking process is performed to cure the color pigment.

Ink-jet printing technology can directly apply color pigments to a substrate to form a color filter, which has the advantage of not requiring the use of a mask or a stencil. Color filter films of different colors can be produced. In addition, the inkjet printing process not only has a simple process step, but also has no problems associated with the use of other acid-base solutions.

1A to 1C are schematic diagrams showing a manufacturing process of a conventional color filter substrate, and FIG. 2 is a top view of a conventional color filter substrate. Referring to FIG. 1A, a substrate 100 is first provided, and a black matrix layer 110 is formed on the substrate 100. As can be seen from FIG. 1A, the black matrix layer 110 has a plurality of openings 112 to define a pixel region on the substrate 100. It should be noted that in the fabrication process of the black matrix layer 110, the generation of the defect region D is difficult to avoid. Generally, the defect region D refers to the defect of the black matrix layer 110, and if the defect region D is not repaired. This will cause the subsequent formation of color pigments to overflow and color mixing.

Next, referring to FIG. 1B, in order to avoid overflow and color mixing of the subsequently formed color pigment, a repair light-shielding layer 120 having a lyophilic property may be formed on the defect region D.

Next, referring to FIG. 1C, after the repair of the light-shielding layer 120, color pigments of different colors are formed in the respective openings 112. Since the repairing light-shielding layer 120 has an ink-repellent property, the color pigment hardly comes into contact with the repairing light-shielding layer 120, resulting in a phenomenon in which the color pigment is incompletely filled near the repairing light-shielding layer 120 (at the position X in FIG. 1C). After the color pigment is filled in the opening 112, the color pigment is cured to the color filter film 130 by a thermal baking process to complete the fabrication of the color filter substrate CF. At this time, the incomplete filling of the color filter film 130 may cause light leakage at the position X, as shown in FIG.

The present invention provides a color filter substrate and a method of manufacturing the same to effectively improve leakage caused by incomplete filling of a color filter film.

The present invention provides a color filter substrate comprising a substrate, a black matrix layer, a plurality of color filter films, and at least one repair structure. The black matrix layer is disposed on the substrate, the black matrix layer has a plurality of openings, and the black matrix layer has at least one defect region between adjacent openings. The color filter film is disposed in the opening, and the repair structure is disposed on the defect area. The foregoing repair structure includes a layer of ink receptive material and a layer of ink repellent material, wherein the layer of ink receptive material is disposed on the substrate, and the layer of ink receptive material is in contact with the adjacent color filter film. Further, a layer of ink repellent material is stacked on the layer of ink receptive material.

In an embodiment of the invention, the opening is to expose a portion of the substrate, and the color filter film is disposed on the substrate exposed by the opening.

In one embodiment of the invention, the width of the aforementioned layer of inking material is greater than the width of the layer of ink repellent material.

In one embodiment of the invention, the total thickness of the layer of ink receptive material and layer of ink repellent material is substantially equal to the thickness of the black matrix.

In one embodiment of the invention, the layer of ink receptive material and layer of ink repellent material are capable of shielding light.

In one embodiment of the invention, the aforementioned layer of ink receptive material or layer of ink repellent material is capable of shielding light.

The present invention provides a method of manufacturing a color filter substrate. First, a black matrix layer is formed on a substrate, wherein the black matrix layer has a plurality of openings. Next, it is detected whether the black matrix layer has a defect region located between adjacent openings. When the black matrix has a defect region, a repair structure is formed on the defect region, and the foregoing repair structure is formed on the substrate. A layer of inking material is formed. Thereafter, a layer of ink repellent material is formed on the layer of ink receptive material to cause the layer of ink repellent material to be stacked on the layer of ink receptive material. Next, a plurality of color filter films are formed in the openings.

In an embodiment of the invention, the method of forming the aforementioned layer of inking material comprises inkjet printing, dispensing or dry film bonding.

In one embodiment of the invention, the method of forming the aforementioned layer of ink repellent material comprises ink jet printing, coating or dry film bonding.

In an embodiment of the invention, the method of forming the color filter film described above comprises inkjet printing.

Based on the above, since the present invention repairs the defective region by using the layer of the ink receptive material and the layer of the ink repellent material stacked on the layer of the ink receptive material, the present invention enables the color filter film to be in contact with the layer of the ink receptive material to avoid The color filter film is filled with light leakage caused by incompleteness.

The above described features and advantages of the present invention will be more apparent from the following description.

3A to 3D and 4A to 4D are schematic views showing a manufacturing process of a color filter substrate according to an embodiment of the present invention. Referring first to FIG. 3A and FIG. 4A, a substrate 200 is provided, and a black matrix layer 210 is formed on the substrate 200. In the present embodiment, the black matrix layer 210 has a plurality of openings 212 to define a pixel region on the substrate 200. It should be noted that in the fabrication process of the black matrix layer 210, the generation of the defect region D is difficult to avoid. Generally, the defect region D refers to the defect of the black matrix layer 210.

As can be seen from FIG. 3A, the black matrix layer 210 has a plurality of lyophilic particles 210a, and the ink repellent particles 210a are distributed on the upper surface of the black matrix layer 210 to effectively prevent overflow and color mixing of subsequently formed color pigments. The problem.

3B, 3C, 4B, and 4C, in the present embodiment, after the black matrix layer 210 is completed, it is detected whether the black matrix layer 210 has a defective region D located between adjacent openings 212. (Drawed in FIG. 3A and FIG. 4A), when the black matrix layer 210 has the defect region D, a repair structure 220 is formed on the defect region D in order to avoid overflow and color mixing of the subsequently formed color pigment. In this embodiment, the repair structure 220 is formed by forming an ink-repellent material layer 220a on the substrate 200 at the defect area D, and then forming an ink-repellent material layer 220b on the ink-receptive material layer 220a, so that The ink repellent material layer 220b can be stacked on the ink receptive material layer 220a. For example, the method of forming the ink receptive material layer 220a and the ink repellent material layer 220b is, for example, inkjet printing, dispensing, or dry film bonding. It should be noted that the aforementioned coating process can be achieved, for example, by a needle or a micropipette.

In the above, the ink repellent material layer 220b of the present embodiment has, for example, a plurality of ink repellent particles 222, so that the surface of the ink repellent material layer 220b has a certain degree of ink repellent property, which helps to prevent the subsequent formation of color pigments from overflowing. Flow and color mixing.

3S and FIG. 4D, the width of the ink receptive material layer 220a of the present embodiment is greater than the width of the ink repellent material layer 220b, and the total thickness of the ink receptive material layer 220a and the ink repellent material layer 220b is substantially equal to the black matrix 210. thickness of. However, the present invention does not limit the width and thickness of the ink receptive material layer 220a and the ink repellent material layer 220b. Those skilled in the art can make appropriate changes and changes according to the actual needs of the product.

In addition, in order to make the repair structure 220 still have the function of shielding light, the present embodiment can use the material capable of shielding light to form the ink-repellent material layer 220a and the ink-repellent material layer 220b. Of course, in this embodiment, one of the ink receptive material layer 220a and the ink repellent material layer 220b may be formed by using a material capable of shielding light. In other words, as long as one of the ink receptive material layer 220a and the ink repellent material layer 220b can shield the light, the ink receptive material layer 220a and the ink repellent material layer 220b will be more diverse in material selection.

3D and 4D, after the repair structure 220 is formed, color pigments of different colors are formed in the respective openings 212. Since the ink receptive material layer 220a in the repair structure 220 has an ink receptive property, and the ink repellent material layer 220b has an ink repellent property, the color pigment will be in contact with the ink receptive material layer 220a not covered by the ink repellent material layer 220b, but the color The pigment hardly comes into contact with the ink repellent material layer 220b. At this time, the color pigment can be effectively covered adjacent to the repair structure 220 (at the position X in FIG. 3D) without occurrence of incomplete filling, so that light leakage is less likely to occur at the position X. After the color pigment is filled in the opening 212, the color pigment can be cured into the color filter film 230 through a thermal baking process or other curing process to complete the color filter substrate CF. In view of the above, the aforementioned method of forming the color filter film 230 includes inkjet printing.

The structure of the color filter substrate CF of the present embodiment will be described below with reference to FIGS. 3D and 4D.

Referring to FIG. 3D and FIG. 4D , the color filter substrate CF of the embodiment includes a substrate 200 , a black matrix layer 210 , a plurality of color filter films 230 , and at least one repair structure 220 . The black matrix layer 210 is disposed on the substrate 200, the black matrix layer 210 has a plurality of openings 212, and the black matrix layer 210 has at least one defect region D between adjacent openings 212. The color filter film 230 is disposed in the opening 212. In detail, the opening 212 of the black matrix layer 210 exposes a portion of the substrate 200, and the color filter film 230 is disposed on the substrate 210 exposed by the opening 212.

The repair structure 220 is disposed on the defect area D. The repair structure 220 includes an ink-receptive material layer 220a and an ink-repellent material layer 220b. The ink-repellent material layer 220a is disposed on the substrate 200, and the ink-repellent material layer 220a is in contact with the adjacent color filter film 230. Further, the ink repellent material layer 220b is stacked on the ink receptive material layer 220a.

Based on the above, since the present invention simultaneously repairs the defect region by using the layer of the ink receptive material and the layer of the ink repellent material stacked on the layer of the ink receptive material, the present invention can bring the color filter film into contact with the layer of the ink receptive material to avoid Light leakage caused by incomplete color filter film filling.

100, 200. . . Substrate

110, 210. . . Black matrix layer

112, 212. . . Opening

120. . . Repair the shading layer

130, 230. . . Color filter film

210a, 222. . . Smoky particles

220. . . Repair structure

220a. . . Ink material layer

220b. . . Thin ink layer

D. . . Defect zone

CF. . . Color filter substrate

X. . . position

1A to 1C are schematic views showing a manufacturing process of a conventional color filter substrate.

2 is a top plan view of a conventional color filter substrate.

3A to 3D and 4A to 4D are schematic views showing a manufacturing process of a color filter substrate according to an embodiment of the present invention.

200. . . Substrate

210. . . Black matrix layer

210a. . . Smoky particles

212. . . Opening

220. . . Repair structure

220a. . . Ink material layer

220b. . . Thin ink layer

230. . . Color filter film

D. . . Defect zone

CF. . . Color filter substrate

X. . . position

Claims (10)

A color filter substrate comprising: a substrate; a black matrix layer disposed on the substrate, wherein the black matrix layer has a plurality of openings, and the black matrix layer has at least one defect region between adjacent openings a plurality of color filter films disposed in the openings; and at least one repairing structure disposed on the defect region, wherein the repairing structure comprises: a layer of inking material disposed on the substrate, wherein the ink is disposed The material layer is in contact with the adjacent color filter film; and a layer of the ink repellent material is stacked on the layer of the ink receptive material. The color filter substrate of claim 1, wherein the openings expose a portion of the substrate, and the color filter films are disposed on the substrate exposed by the openings. The color filter substrate of claim 1, wherein the ink-repellent material layer has a width greater than a width of the ink-repellent material layer. The color filter substrate of claim 1, wherein the total thickness of the layer of ink receptive material and the layer of ink repellent material is substantially equal to the thickness of the black matrix layer. The color filter substrate of claim 1, wherein the layer of ink receptive material and the layer of ink repellent material are capable of shielding light. The color filter substrate of claim 1, wherein the layer of ink receptive material or the layer of ink repellent material is capable of shielding light. A method of manufacturing a color filter substrate, comprising: Forming a black matrix layer on a substrate, wherein the black matrix layer has a plurality of openings; detecting whether the black matrix layer has a defect region located between adjacent openings; when the black matrix layer has the defect region, Forming a repair structure on the defect region, and forming the repair structure includes: forming a layer of ink receptive material on the substrate; forming a layer of ink repellent material on the layer of the ink receptive material to make the ink repellent material Layers are stacked on the layer of ink receptive material; and a plurality of color filter films are formed in the openings. The method of manufacturing a color filter substrate according to claim 7, wherein the method of forming the ink receptive material layer comprises inkjet printing, dispensing, or dry film bonding. The method of manufacturing a color filter substrate according to claim 7, wherein the method of forming the ink repellent material layer comprises inkjet printing, coating or dry film bonding. The method of manufacturing a color filter substrate according to claim 7, wherein the method of forming the color filter films comprises inkjet printing.