JP2006251135A - Color filter and manufacturing method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-quality color filter which has is efficiently manufactured and is free from void etc. in its colored layer. <P>SOLUTION: The color filter comprises: a substrate 1; resin parts 2 which are formed on the substrate 1 in a pattern shape; the colored layer 3 formed on an opening part divided by the resin parts 2; and light shielding parts 4 which are thicker than the width of the resin parts 2 and are formed on the resin parts 2 so as to cover edge parts of the colored layer 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a color filter that can be used in a liquid crystal display device and a manufacturing method thereof.

  In recent years, with the development of personal computers, especially portable personal computers, the demand for liquid crystal display devices, particularly color liquid crystal display devices, has been increasing. This color liquid crystal display device is provided with a color filter having a colored layer of three primary colors, usually red (R), green (G), and blue (B), and a light shielding portion for partitioning the color layer. By turning on and off the electrodes corresponding to the R, G, and B pixels, the liquid crystal operates as a shutter, and light passes through each of the R, G, and B pixels, and color display is performed. .

  Examples of conventional color filter manufacturing methods include a dyeing method and a pigment dispersion method. However, in any method, it is necessary to repeat the same process three times in order to color the three colors of R, G, and B, and there is a problem that the cost is high, and the yield decreases because the process is repeated. There's a problem.

  Therefore, for example, a light shielding portion (bank) is formed to hold a coating solution for forming a colored layer on the base material, and the light shielding portion is subjected to plasma treatment using a fluorine compound as an introduction gas, and the light shielding portion. There has been proposed a method of forming a colored layer by an ink jet method with a liquid repellency (Patent Document 1). However, in this case, since the light-shielding portion has liquid repellency, there is a problem that the colored layer forming coating solution for forming the colored layer does not wet and spread at the end of the light-shielding portion, resulting in white spots in the colored layer. It was.

JP 2000-187111 A

  Therefore, it is desired to provide a high-quality color filter that has high production efficiency and has no white spots in the colored layer.

  The present invention includes a base material, a resin portion formed in a pattern on the base material, a colored layer formed on an opening defined by the resin portion, and the resin portion on the resin portion. And a light-shielding portion formed so as to cover an end portion of the colored layer.

  According to the present invention, since the light-shielding part is formed so as to partially cover the end of the colored layer, no white spots or the like occur in the colored layer between the light-shielding part and the colored layer. can do. In the present invention, since the resin portion is formed, the colored layer can be formed along the resin portion by a discharge method or the like. Therefore, the color filter manufactured efficiently can be obtained.

  The present invention also includes a resin part forming step of forming a resin part having liquid repellency in a pattern on a base material, and a colored layer forming process of forming a colored layer in an opening partitioned by the resin part. And a light shielding part forming step of forming a light shielding part thicker than the width of the resin part on the resin part after the colored layer forming process.

  According to the present invention, since the resin portion formed by the resin portion forming step has liquid repellency, a colored layer can be formed with high definition by using, for example, a discharge method using the liquid repellency. It becomes possible. Moreover, since the said light-shielding part is formed by the said light-shielding part formation process after the said colored layer formation process, it can form so that a light-shielding part may cover the edge part of a colored layer. Therefore, the colored layer of the manufactured color filter can be free from white spots and the like, and an efficient color filter manufacturing method can be achieved.

  In the above invention, the resin part forming step is carried out by forming a resin part forming layer in a pattern on a substrate and irradiating the resin part forming layer with plasma using a fluorine compound as an introduction gas. It can be set as the process of forming. In this case, fluorine can be introduced into the resin portion forming layer by the plasma irradiation, and the resin portion can be easily formed. At this time, by using a material made of an inorganic material as the substrate, fluorine can be prevented from being introduced into the substrate. Accordingly, the resin portion can be made a liquid-repellent region and the substrate can be made a lyophilic region, and the colored layer can be formed with high definition in the colored layer forming step. .

  Moreover, in the said invention, the said resin part formation process is good also as a process of forming a resin part using the composition for resin parts containing a liquid repellent material on a base material. In this case, since the liquid repellent material is contained in the resin part forming composition part, the resin part having liquid repellency can be easily formed.

  According to the present invention, it is possible to prevent white spots from occurring in the colored layer between the light shielding portion and the colored layer. In addition, the colored layer can be formed along the resin portion by a discharge method or the like, and the color filter manufactured efficiently can be obtained.

  The present invention relates to a color filter that can be used in a liquid crystal display device and a manufacturing method thereof. Each will be described separately below.

A. Color Filter First, the color filter of the present invention will be described. The color filter of the present invention includes a base material, a resin portion formed in a pattern on the base material, a colored layer formed on an opening section defined by the resin portion, and the resin portion. And a light-shielding portion that is thicker than the resin portion and covers an end portion of the colored layer.

  For example, as shown in FIG. 1, the color filter of the present invention includes a base material 1, a resin portion 2 formed in a pattern on the base material 1, and openings defined by the resin portion 2 (for example, in the figure). , A color filter having a colored layer 3 formed on the resin portion 2 and a light shielding portion 4 formed on the resin portion 2, and the width t of the light shielding portion 4 is The light shielding part 4 is formed so as to cover the end of the colored layer 3.

  Here, the phrase “the light shielding portion is formed wider than the width of the resin portion” means that the width of the upper bottom surface of the light shielding portion is larger than the width of the upper bottom surface of the resin portion. Note that the upper bottom surface of the resin part means a surface opposite to the surface in contact with the base material, and the upper bottom surface of the light shielding part is a surface opposite to the surface in contact with the resin part. I will say. About the width | variety of the said resin part and the said light-shielding part, it can measure from the thing etc. which image | photographed the cross section of the color filter with the scanning electron microscope (SEM) etc., for example.

  In the present invention, since the resin portion is formed, the colored layer can be formed along the resin portion by, for example, a discharge method or the like, and is efficiently formed with high definition. Can be.

In addition, as described above, when the colored layer is formed by utilizing the liquid repellency of the light shielding part, the colored layer forming coating solution may not wet and spread near the end of the light shielding part, and white spots may occur. is there. On the other hand, in the present invention, the light shielding part is formed after the colored layer is formed using the resin part. Therefore, for example, when forming a colored layer, even if white spots are generated between the resin portion and the colored layer, the portion can be covered with a light-shielding portion. It is possible to obtain a high quality color filter in which the colored layer has no white spots.
Hereinafter, each configuration of the color filter of the present invention will be described in detail.

1. Resin part First, the resin part used for the color filter of this invention is demonstrated. The resin part used for this invention is formed in a pattern shape on the base material mentioned later, and is normally formed in the same pattern shape as the light-shielding part mentioned later.

  Such a resin part is not particularly limited in its transparency, and may be, for example, a light-shielding part or a colored part similar to the light-shielding part. It is preferable that the resin part has transparency. Generally, when the resin portion is formed by a photolithography method or the like, it is possible to make the line width narrower if it has transparency. Therefore, by making the resin portion transparent, the line width of the resin portion can be reduced, and a color filter having a wide display area can be obtained with a thin line width of a light shielding portion described later. Because. Here, the width of the resin part is specifically about 1 μm to 200 μm, and preferably about 5 μm to 30 μm.

  Moreover, as the shape of the resin part, any colored layer forming coating liquid that is applied to adjacent openings can be partitioned so as not to be mixed with each other when forming a colored layer. For example, the cross-sectional shape may be a rectangular shape, a triangular shape, a trapezoidal shape, or the like. At this time, the average film thickness of the resin portion is preferably about 0.1 to 50 μm, and more preferably about 0.5 to 10 μm.

  Here, in this invention, it is preferable that the said resin part is what has liquid repellency. This is because the colored layer can be formed with high definition by, for example, a discharge method using the liquid repellency of the resin portion. At this time, the resin part has a contact angle with a liquid of 40 mN / m of 10 ° or more, particularly a contact angle with a liquid with a surface tension of 30 mN / m of 10 ° or more, particularly with a liquid with a surface tension of 20 mN / m. The contact angle is preferably 10 ° or more. This is because when the contact angle of the resin part with the liquid is small, the liquid repellency is not sufficient, and when the colored layer described later is formed, the coating liquid for forming the colored layer also adheres to the resin part. This is because it may be difficult to form a colored layer with high definition.

  In addition, the contact angle with the liquid here is measured using a contact angle measuring instrument (Kyowa Interface Science Co., Ltd. CA-Z type) with a liquid having various surface tensions (from the microsyringe to the liquid. 30 seconds after dropping a droplet), and from the result or graphing the result. In this measurement, as the liquid having various surface tensions, a wetting index standard solution manufactured by Junsei Chemical Co., Ltd. is used.

  In the present invention, the method for forming the resin portion is not particularly limited, and can be the same as the method for forming a resin light-shielding portion in a general color filter. For example, a printing method or photolithography can be used. It may be formed by a law or the like. As a method for forming a resin portion when the resin portion has liquid repellency, for example, a resin portion forming layer having no liquid repellency is formed into a pattern by the above method, and then the resin portion is formed. For example, a liquid repellent treatment may be applied to the protective layer, or a resin part may be formed by the above method using a resin part forming composition having liquid repellency. Since the method for forming the resin part having such a liquid repellency will be described in the section “B. Color Filter Manufacturing Method”, a detailed description thereof is omitted here.

  Further, the material used for forming the resin part is not particularly limited as long as the resin part can be formed as described above, and the material used for forming the light shielding part in a general color filter. Can be similar. Examples of the resin used in such a resin portion include a mixture of one or more resins such as polyimide resin, acrylic resin, epoxy resin, polyacrylamide, polyvinyl alcohol, gelatin, casein, and cellulose, and photosensitivity. Resin, and further an O / W emulsion type resin composition, for example, an emulsion of reactive silicone can be used.

2. Next, the light shielding part used in the color filter of the present invention will be described. The light shielding portion used in the color filter of the present invention is formed on the resin portion so as to be thicker than the width of the resin portion and to cover an end portion of a colored layer to be described later. The end portion of the colored layer usually refers to a region on the colored layer side of about 0.1 μm to 20 μm, particularly about 1 μm to 5 μm from the boundary between the resin portion and the colored layer. This is because when the end portion of the colored layer is covered, it is possible to prevent white spots from occurring in the colored layer around the light shielding portion.

  Moreover, in this invention, the said light-shielding part is formed thicker than the width | variety of the said resin part, Usually, when the width | variety of the said resin part is set to 1, the width | variety of a light-shielding part is 1.01-2. Among these, it is preferable that the inner diameter is in the range of 1.1 to 1.5.

  Specifically, the width of the light-shielding portion is appropriately selected depending on the type of the color filter and the like, and is usually about 5 μm to 240 μm, especially about 5 μm to 30 μm, and particularly about 10 μm to 20 μm. Is preferred. This is because a color filter having a wide display area can be obtained.

  Furthermore, the film thickness of the light shielding part is preferably about 0.1 to 50 μm, more preferably about 0.5 to 10 μm.

  Further, the material used for forming the light shielding part can be appropriately selected depending on the method for forming the light shielding part, etc., and is the same as that used for forming the light shielding part in a general color filter. can do. As a material used for forming such a light shielding part, for example, a resin binder and a material containing light shielding particles such as carbon fine particles, metal oxides, inorganic pigments, and organic pigments can be used. Examples of the resin binder include polyimide resin, acrylic resin, epoxy resin, polyacrylamide, polyvinyl alcohol, gelatin, casein, cellulose, or a mixture of one or more resins, photosensitive resin, and O / W. An emulsion type resin composition, for example, an emulsion of reactive silicone can be used.

  In the present invention, the light shielding portion as described above may be formed by, for example, a photolithography method or a printing method, or may be formed by a discharge method such as an ink jet method. .

3. Next, the colored layer used in the present invention will be described. The colored layer used in the present invention is formed on the base material to be described later, and is formed in the opening section partitioned by the resin section.

  Such a colored layer is usually formed of three colors of red (R), green (G), and blue (B), but may be formed of four or more colors. . Furthermore, the arrangement of the colored layers may be a known arrangement such as a stripe type, a mosaic type, a triangle type, or a four-pixel arrangement type, and the formation area and the like are appropriately selected depending on the type of color filter and the like. It can be.

  In the present invention, the method for forming the colored layer is not particularly limited, but the colored layer is preferably formed by an inkjet method using the resin portion. This is because a colored layer can be formed with high definition without going through a complicated process, which is preferable in terms of manufacturing efficiency and the like. Since such a colored layer forming method and forming material can be the same as the colored layer forming method and forming material in a general color filter, detailed description thereof is omitted here.

4). Next, the substrate used in the present invention will be described. The base material used for this invention will not be specifically limited if the said resin part and a colored layer can be formed, It can be made to be the same as that of the base material used for a general color filter. As such a base material, for example, a non-flexible transparent rigid material such as quartz glass, Pyrex (registered trademark) glass, or synthetic quartz plate, or a flexible resin film such as a transparent resin film or an optical resin plate is used. A transparent flexible material can be used.

  In the present invention, among those described above, those having lyophilic properties or those having been subjected to lyophilic treatment are preferred. As a result, when the colored layer is formed, the colored layer forming coating solution can be wet and spread in the opening of the resin portion, and no white spots or the like are generated in the colored layer. Because.

As a contact angle with a liquid of such a lyophilic substrate, a contact angle with a liquid of 40 mN / m is less than 9 °, preferably a contact angle with a liquid with a surface tension of 50 mN / m is 10 ° or less. In particular, the contact angle with a liquid having a surface tension of 60 mN / m is preferably 10 ° or less. When the contact angle with the liquid of the base material is high, the colored layer forming coating liquid that forms the colored layer may be repelled even in the opening section defined by the resin part when forming the colored layer. This is because it may be difficult to form the colored layer with high definition.
In addition, the contact angle with the liquid here is a value measured by the method described above.

5. Next, the color filter of the present invention will be described. The color filter of the present invention is not particularly limited as long as it has the substrate, the resin part, the colored layer, and the light-shielding part. If necessary, for example, other alignment films, transparent electrode layers, etc. It may have a member.
Such a member can be the same as that used for a general color filter, and therefore a detailed description thereof is omitted here.

B. Next, a method for producing a color filter of the present invention will be described. The method for producing a color filter of the present invention includes a resin part forming step of forming a resin part having liquid repellency in a pattern on a substrate, and a color forming a colored layer in the opening section defined by the resin part. It has a layer formation process and the light shielding part formation process which forms a light shielding part thicker than the width | variety of the said resin part on the said resin part after the said colored layer formation process.

  The color filter manufacturing method of the present invention includes, for example, as shown in FIG. 2, a resin part forming step (FIG. 2 (a)) for forming a resin part 2 having liquid repellency on a substrate 1 in a pattern, A colored layer forming step (FIG. 2B) for forming a colored layer 3 in an opening (for example, a region indicated by a in the figure) partitioned by the resin portion, and after the colored layer forming step, the resin portion 2 having a light shielding part forming step of forming the light shielding part 4 thicker than the width s of the resin part 2. Here, the formation of the light shielding portion wider than the width of the resin portion means that the width of the upper bottom surface of the light shielding portion is larger than the width of the upper bottom surface of the resin portion. The upper bottom surface of the resin part means a surface opposite to the side in contact with the base material, and the upper bottom surface of the light shielding part is a surface opposite to the side in contact with the resin part. I will say.

In the present invention, since the colored layer is formed after forming the resin portion, it is possible to easily form the colored layer with high precision by a discharge method or the like using the liquid repellency of the resin portion. Become. In addition, since the light shielding part forming step for forming the light shielding part is performed after the colored layer forming process, for example, when the colored layer is formed, white spots are generated between the resin part and the colored layer. However, this portion can be covered with a light-shielding portion, and finally, a high-quality color filter in which the colored layer does not have white spots or the like can be manufactured.
Hereafter, the manufacturing method of the color filter of this invention is demonstrated in detail for every process.

1. Resin Part Formation Step First, the resin part formation step of the present invention will be described. The resin part forming step of the present invention is a step of forming a resin part having liquid repellency in a pattern on a base material, and the resin part is usually a light shielding part formed by a light shielding part forming step described later. It is formed in a similar pattern.

  Here, the resin part formed by this step has liquid repellency. Specifically, as the liquid repellency of the resin part, a contact angle with a liquid having a contact angle with a liquid of 40 mN / m. However, it is preferable that the contact angle with a liquid having a surface tension of 30 mN / m is 10 ° or more, and especially the contact angle with a liquid having a surface tension of 20 mN / m is 10 ° or more. This is because when the contact angle of the resin part with the liquid is small, the liquid repellency is not sufficient, and in the colored layer forming step described later, the colored layer forming coating liquid adheres to the resin part, This is because it may be difficult to form a colored layer with high precision. The contact angle with the liquid here is a value measured by the method described above.

  In addition, the method for forming the resin part in this step is not particularly limited as long as the resin part can be formed. For example, the resin part is formed using a material having liquid repellency. Alternatively, a method of forming a resin part by forming a resin part forming layer having no liquid repellency and then performing a liquid repellency treatment on the resin part forming layer may be used.

  In the present invention, in particular, a resin part forming layer is formed in a pattern that forms a resin part on a base material, and the resin part is formed by irradiating plasma using a fluorine compound on the resin part forming layer. Or a method of forming a resin part using a resin part forming composition containing a liquid repellent material (hereinafter referred to as a second aspect). It is preferable. This is because according to these methods, the resin portion can be efficiently formed. Hereinafter, each of the above embodiments will be described.

  In addition, about the shape of the resin part formed by this process, since it can be made to be the same as that of what was demonstrated by the term of the resin part of "A. Color filter" mentioned above, detailed description here is abbreviate | omitted. .

a. 1st aspect First, the 1st aspect of the resin part formation process of this invention is demonstrated. As a method for forming the resin part in the first aspect, a resin part forming layer is formed in a pattern on a base material, and the resin part forming layer is irradiated with plasma using a fluorine compound as an introduction gas. This is a method of forming a resin portion.

  When plasma irradiation is performed using a fluorine compound as an introduction gas, fluorine can be introduced into an organic substance. In the present invention, since the plasma irradiation is performed on the resin part forming layer, fluorine can be introduced into the resin part forming layer, and a resin part having liquid repellency can be obtained. . At this time, fluorine can be prevented from being introduced into the substrate by using an inorganic material as the substrate. Thereby, the liquid-repellent area on the resin part, and the area partitioned by the resin part, that is, the area where the base material is exposed can be used as the lyophilic area. There is also an advantage that it is possible to form the light-shielding portion with high definition using the difference between the two.

  Here, the resin portion forming layer formed in this step does not need to have liquid repellency, and can be the same as a layer made of a general resin. Further, the method for forming the resin part forming layer in a pattern is not particularly limited, and for example, a method using a printing method, a photolithography method, or the like can be used.

  Further, the base material used in this embodiment can be the same as that used in general color filters. For example, there is no flexibility such as quartz glass, Pyrex (registered trademark) glass, synthetic quartz plate and the like. A transparent rigid material, or a transparent flexible material having flexibility such as a transparent resin film or an optical resin plate can be used. In this embodiment, among these, it is preferable to use an inorganic material. As described above, by using an inorganic material as the base material, it is possible to prevent fluorine from being introduced even by plasma irradiation using a fluorine compound as an introduction gas. This is because it can be used as a lyophilic region.

  The method of irradiating the resin part forming layer with plasma using a fluorine compound as an introduction gas is not particularly limited as long as it is a method capable of introducing fluorine into the resin part forming layer. For example, a plasma irradiation method in a vacuum or a plasma irradiation method under atmospheric pressure may be used. For example, only the resin part forming layer may be irradiated with plasma, or the resin part forming layer and the exposed base material may be irradiated with plasma.

Examples of the fluorine compound of the introduced gas used when the plasma is irradiated include carbon fluoride (CF ₄ ), fluorine nitride (NF ₃ ), sulfur fluoride (SF ₆ ), C ₂ Cl ₃ F ₃ , and C _{2. F 6, C} 3 F _6, and the like. Moreover, the irradiation condition of the plasma to be irradiated is appropriately selected depending on the irradiation apparatus or the like.

  Here, in this embodiment, the plasma irradiation is preferably plasma irradiation under atmospheric pressure. This is because an apparatus for decompression or the like is not necessary, which can be preferable in terms of cost, manufacturing efficiency, and the like. The irradiation conditions of such atmospheric pressure plasma can be as follows. For example, the power output can be the same as that used in a general atmospheric pressure plasma irradiation apparatus. In this case, the distance between the irradiated plasma electrode and the light shielding portion is preferably about 0.2 mm to 20 mm, and more preferably about 1 mm to 5 mm. Furthermore, the flow rate of the fluorine compound used as the introduction gas is preferably about 1 L / min to 100 L / min, and more preferably about 5 L / min to 50 L / min, and the substrate transport speed at this time is 0.1 m / min. About 10 to 10 m / min, particularly about 0.5 to 5 m / min is preferable.

  In this process, the presence of fluorine introduced into the resin part forming layer is detected in all elements detected from the surface of the resin part forming layer in the analysis using an X-ray photoelectron spectrometer (XPS: ESCALAB 220i-XL). This can be confirmed by measuring the ratio of the fluorine element. At this time, the proportion of the fluorine is preferably 10% or more.

b. Second Aspect Next, a second aspect of the resin part forming step will be described. The resin part forming method in the second aspect is a method of forming a resin part using a resin part forming composition containing a liquid repellent material. According to this aspect, since the resin part is formed using the resin part forming composition containing the liquid repellent material, the formed resin part can have liquid repellency.

  The composition for forming a resin part is not particularly limited as long as it contains a liquid repellent material and can form a resin part in a desired pattern. For example, a liquid repellent material may be added to a resin used for forming a light shielding portion in a color filter. The resin can be the same as the resin described in the section of the resin part of “A. Color filter”, and thus the description thereof is omitted here.

  The liquid repellent material is not particularly limited as long as it exhibits liquid repellency when the resin part is formed. For example, the liquid repellent material may have polymerizability. The thing etc. which do not have may be sufficient. Examples of such a liquid repellent material include a liquid repellent surfactant. Examples of such surfactants include hydrocarbons such as NIKKOL BL, BC, BO, and BB series manufactured by Nikko Chemicals Co., Ltd., ZONYL FSN, FSO manufactured by DuPont, and Surflon S- manufactured by Asahi Glass Co., Ltd. 141, 145, Dainippon Ink & Chemicals Co., Ltd. Megafax F-141, 144, Neos Co., Ltd.'s Fantent F-200, F251, Daikin Industries, Ltd. Unidyne DS-401, 402, 3M Co., Ltd. ) Fluoro- or silicone-based nonionic surfactants such as Fluorad FC-170 and 176 manufactured by the company, and cationic surfactants, anionic surfactants and amphoteric surfactants can also be used. .

  The liquid repellent material is preferably contained in the resin part forming composition in an amount of about 0.01% by weight to 10% by weight, and more preferably about 0.5% by weight to 5% by weight. It is because the resin part to be formed can have the liquid repellency as described above by containing the liquid repellent material within such a range.

  The resin part forming method using the resin part forming composition can be the same as the resin part forming layer forming method of the first aspect described above. For example, a photolithography method or a printing method can be used. Alternatively, a method using the semiconductor photocatalyst-containing layer may be used. Moreover, since it can be set as the same as the 1st aspect mentioned above as a base material used for this aspect, detailed description here is abbreviate | omitted. In the present embodiment, the base material is preferably lyophilic, and the base material may be lyophilic. As a result, the opening defined by the resin portion, that is, the region where the substrate is exposed can be made a lyophilic region, and the colored layer can be formed with higher definition in the colored layer forming step described later. Because it becomes.

2. Colored layer forming step Next, the colored layer forming step in the present invention will be described. The colored layer forming step in the present invention is a step of forming a colored layer in the opening defined by the resin portion. In the present invention, it is possible to form a high-definition colored layer only in the opening by utilizing the liquid repellency of the resin portion.

  The method for forming the colored layer in this step can be the same as the method for forming the colored layer in a general color filter. In the present invention, however, the colored layer is formed by a discharge method using a dispenser or an inkjet device. In particular, it is preferable to form a colored layer by an inkjet method. This is because complicated processes and apparatuses are not necessary, and it is preferable from the viewpoint of manufacturing efficiency and cost.

  In addition, the material used for forming the colored layer can be the same as that used for forming the colored layer in a general color filter, and thus detailed description thereof is omitted here.

  The colored layer formed in this step is usually formed with three colors of red (R), green (G), and blue (B), but may be formed of four or more colors. Good. Moreover, the arrangement of the colored layer formed by this step can be a known arrangement such as a stripe type, a mosaic type, a triangle type, a four-pixel arrangement type, and the formation area and the like of the color filter to be manufactured. It can be appropriately selected depending on the type and the like.

3. Next, the light shielding part forming step of the present invention will be described. The light shielding part forming step in the present invention is a step of forming a light shielding part thicker than the width of the resin part on the resin part after the colored layer forming step.

  The method for forming the light shielding part in this step is not particularly limited as long as it can be formed thicker than the width of the resin part, and is the same as the method for forming the light shielding part in a general color filter. It can be. For example, an ink jet method or a printing method may be used, and a photolithography method or the like may be used.

  Moreover, as the width of the light shielding part formed by this step, when the width of the resin part is 1, the width of the light shielding part is in the range of 1.01 to 2, especially 1.1 to 1.5. It is preferable to form the light shielding portion so as to be within the range. Further, at this time, it is preferable to form the light shielding part so that the light shielding part covers the end of the colored layer, and specifically, about 0.1 μm to 20 μm, particularly 1 μm from the boundary part between the resin part and the colored layer. It is preferable to form the light-shielding portion so as to cover up to a region on the colored layer side of about ˜5 μm. This is because white spots can be prevented from occurring in the colored layer.

  The width of the light shielding portion formed by this step is specifically about 5 μm to 240 μm, preferably about 5 μm to 30 μm, particularly about 10 μm to 20 μm, and the thickness of the light shielding portion is 0. It is preferably about 1 μm to 50 μm, more preferably about 0.5 μm to 10 μm. This is because the light shielding property of the light shielding portion can be increased, and a high-quality color filter having a wide display area can be obtained.

  The material used for forming the light shielding portion can be the same as that described in the section “A. Color filter” described above, and thus the description thereof is omitted here.

4). Others In the method for producing a color filter in the present invention, in addition to the resin portion forming step, the colored layer forming step, and the light shielding portion forming step, for example, a transparent electrode layer forming step for forming a transparent electrode layer or an alignment film is formed. Other steps may be appropriately included as necessary, such as an alignment film forming step. Since each of these steps can be the same as each step in a general color filter manufacturing method, detailed description thereof is omitted here.

  The present invention is not limited to the above embodiment. The above-described embodiment is an exemplification, and the present invention has substantially the same configuration as the technical idea described in the claims of the present invention, and any device that exhibits the same function and effect is the present invention. It is included in the technical scope of the invention.

[Example 1]
<Formation of resin part>
A polymethylmethacrylate-based resin part was formed on a glass substrate so that the line width was 7 μm and the opening was 93 × 293 μm.
<Plasma treatment>
Atmospheric pressure plasma was irradiated to the area | region containing the opening part and the resin part of the circumference | surroundings on the following conditions. As a result, only the resin portion exhibits liquid repellency (the contact angle with a wetting index standard solution having a surface tension of 30 mN / m, which is 51 °), and the opening where the glass is exposed is lyophilic (surface tension). The contact angle with a 30 mN / m wetting index standard solution was 5 °.
-Introducing gas: CF ₄ ... 15 (l / min.)
・ Distance between electrode and substrate: 2mm
・ Power supply output: 200V-5A
<Formation of colored layer>
Using an inkjet apparatus, UV curable polyfunctional acrylate monomer inks of RGB colors including 5 parts by weight of pigment, 20 parts by weight of solvent, 5 parts by weight of polymerization initiator, and 70 parts by weight of UV curable resin were treated with the above atmospheric pressure plasma. The liquid glass was attached to the exposed end of the opening and colored, and UV treatment was applied thereto to cure, thereby forming a colored layer.
<Formation of light shielding part>
By using a UV curable polyfunctional acrylate monomer ink for a black matrix containing 5 parts by weight of carbon black, 20 parts by weight of a solvent, 5 parts by weight of a polymerization initiator, and 70 parts by weight of a UV curable resin, A light shielding part was formed with a line width of 20 μm so as to cover a part of the resin part.

[Example 2]
<Formation of water-repellent resin part>
A polymethylmethacrylate-based resin part containing a fluorosurfactant (manufactured by ZONYL FSN-100 DuPont) was formed on a glass substrate so that the line width was 7 μm and the opening was 93 × 293 μm. The liquid repellency of the resin part was 45 ° as a result of measuring the contact angle with a wetting index standard solution having a surface tension of 30 mN / m.
<Formation of colored layer>
Using an inkjet apparatus, the glass is exposed to UV curable polyfunctional acrylate monomer ink of each color of RGB including 5 parts by weight of pigment, 20 parts by weight of solvent, 5 parts by weight of polymerization initiator, and 70 parts by weight of UV curable resin. It was made to adhere and color at the opening edge part, and this was UV-processed and hardened, and the colored layer was formed.
<Formation of light shielding part>
By using a UV curable polyfunctional acrylate monomer ink for a black matrix containing 5 parts by weight of carbon black, 20 parts by weight of a solvent, 5 parts by weight of a polymerization initiator, and 70 parts by weight of a UV curable resin, A light shielding part was formed with a line width of 20 μm so as to cover a part of the resin part.

It is a schematic sectional drawing which shows an example of the color filter of this invention. It is process drawing which shows an example of the manufacturing method of the color filter of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Resin part 3 ... Colored layer 4 ... Light-shielding part

Claims (4)

  A base material, a resin portion formed in a pattern on the base material, a colored layer formed on an opening section defined by the resin portion, and a width larger than the width of the resin portion on the resin portion And a light-shielding portion formed to cover an end portion of the colored layer. On the base material, a resin part forming step of forming a resin part having liquid repellency in a pattern,
A colored layer forming step of forming a colored layer in the opening defined by the resin portion;
A method for producing a color filter, comprising: a step of forming a light-shielding portion that is thicker than the width of the resin portion on the resin portion after the colored layer forming step.   The resin part forming step is a step of forming a resin part forming layer in a pattern on a substrate, and forming the resin part by irradiating the resin part forming layer with plasma using a fluorine compound as an introduction gas. The method for producing a color filter according to claim 2, wherein: The method for producing a color filter according to claim 2, wherein the resin portion forming step is a step of forming a resin portion using a resin portion composition containing a liquid repellent material on a substrate. .

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