Source: http://www.google.com/patents/US20070259277?dq=7,403,220
Timestamp: 2015-08-29 06:12:05
Document Index: 516374875

Matched Legal Cases: ['art. 17', 'art. 18', 'art. 19', 'art. 20', 'art. 21', 'art. 25', 'art. 41', 'art. 42']

Patent US20070259277 - Method for manufacturing color filter - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn the present invention, a provision of a method for manufacturing a color filter capable of forming a highly sophisticated pattern, to be formed easily at a low cost is desired. The present invention achieves the above mentioned object by providing a method for manufacturing a color filter comprising:...http://www.google.com/patents/US20070259277?utm_source=gb-gplus-sharePatent US20070259277 - Method for manufacturing color filterAdvanced Patent SearchPublication numberUS20070259277 A1Publication typeApplicationApplication numberUS 11/800,489Publication dateNov 8, 2007Filing dateMay 4, 2007Priority dateJun 13, 2002Also published asUS7390597, US7858274, US20040070705, US20100033659Publication number11800489, 800489, US 2007/0259277 A1, US 2007/259277 A1, US 20070259277 A1, US 20070259277A1, US 2007259277 A1, US 2007259277A1, US-A1-20070259277, US-A1-2007259277, US2007/0259277A1, US2007/259277A1, US20070259277 A1, US20070259277A1, US2007259277 A1, US2007259277A1InventorsHironori KobayashiOriginal AssigneeHironori KobayashiExport CitationBiBTeX, EndNote, RefManReferenced by (4), Classifications (9), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMethod for manufacturing color filter
US 20070259277 A1Abstract
In the present invention, a provision of a method for manufacturing a color filter capable of forming a highly sophisticated pattern, to be formed easily at a low cost is desired. The present invention achieves the above mentioned object by providing a method for manufacturing a color filter comprising: (1) forming a light shielding part on a transparent base material; (2) forming a wettability changeable layer which the wettability changes by the function of a photocatalyst, on the surface of the transparent base material on the side with the light shielding part formed; (3) placing the photocatalyst containing layer of the photocatalyst containing layer side substrate which is the photocatalyst containing layer containing a photocatalyst formed on the base member, and the wettability changeable layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a pixel part forming part comprising a lyophilic area where the contact angle to a liquid is lowered compared with the state before the energy irradiation to the wettability changeable layer, in a pattern; and (4) coloring the pixel part forming part by the ink jet method so as to form a pixel part. Images(17) Claims(28)
1-15. (canceled) 16. A method for manufacturing a color filter comprising: (1) forming a light shielding part on a transparent base material; (2) forming a decomposition removal layer, on the surface of the transparent base material on the side with the light shielding part formed, having a higher contact angle to a liquid than the transparent base material surface, and is decomposed and removed by the function of a photocatalyst; (3) placing a photocatalyst containing layer of a photocatalyst containing layer side substrate, which is the photocatalyst containing layer containing a photocatalyst formed on a base member, and the decomposition removal layer with a gap of 200 pin or less, and irradiating an energy from a predetermined direction to form a pixel part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; and (4) coloring the pixel part forming part by the ink jet method so as to form a pixel part. 17. The method for manufacturing a color filter according to claim 16, comprising: after forming the decomposition removal layer, placing the photocatalyst containing layer and the decomposition removal layer with a gap of 200 μm or less, and forming a liquid repellent convex part forming part, in a pattern, comprising the bared light shielding part by the decomposition removal of the decomposition removal layer by irradiating an energy from a predetermined direction; and forming a liquid repellent convex part in the liquid repellent convex part forming part. 18. A method for manufacturing a color filter comprising: (1) forming a decomposition removal layer, on the a transparent base material, having a higher contact angle to a liquid than the transparent base material surface and is decomposed and removed by the function of a photocatalyst; (2) placing the decomposition removal layer and a photocatalyst containing layer of a photocatalyst containing layer side substrate, which is the photocatalyst containing layer containing a photocatalyst formed on a base member, with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a light shielding part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; (3) forming a light shielding part in the light shielding part forming part; (4) placing the decomposition removal layer with the light shielding part formed thereon, and the photocatalyst containing layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a pixel part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; and (5) coloring the pixel part forming part by an ink jet method so as to form a pixel part. 19. A method for manufacturing a color filter comprising: (1) forming a decomposition removal layer, on the a transparent base material, having a higher contact angle to a liquid than the transparent base material surface and is decomposed and removed by the function of a photocatalyst; (2) placing the decomposition remocal layer and a photocatalyst containing layer of a photocatalyst containing layer side substrate, which is the photocatalyst containing layer containing a photocatalyst formed on a base member, with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a pixel part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; (3) coloring the pixel part forming part by the ink jet method so as to form a pixel part; (4) placing the decomposition removal layer with the pixel part formed thereon, and the photocatalyst containing layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a light shielding part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; and (5) forming a light shielding part in the light shielding part forming part. 20. The method for manufacturing a color filter according to claim 16, wherein the process of forming the pixel part forming part where the transparent base material is bared by the decomposition removal of the decomposition removal layer, and coloring the same by the ink let method to form the pixel part comprises: (a) placing a photocatalyst containing layer of a photocatalyst containing layer side substrate, which is the photocatalyst containing layer containing a photocatalyst formed on a base member, and the decomposition removal layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a first pixel part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; (b) coloring the first pixel part forming part by the ink jet method so as to form a first pixel part; (c) placing the photocatalyst containing layer and the decomposition removal layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a second pixel part forming part, in a pattern, comprising the transparent base material bared by the decomposition removal of the decomposition removal layer; and (d) coloring the second pixel part forming part by the ink jet method so as to form a second pixel part. 21. The method for manufacturing a color filter according to claim 16, wherein the wettability of the transparent base material as a contact angle to a liquid having a 40 mN/m surface tension is less than 10�. 22. The method for manufacturing a color filter according to claim 16, wherein the contact angle, to a liquid having a 40 mN/m surface tension, on the decomposition removal layer is 10� or more. 23. The method for manufacturing a color filter according to claim 16, wherein the decomposition removal layer is any of a self-assembled monolayer, a Langmuir Blodgett film, or a layer-by layer self-assembled film. 24. The method for manufacturing a color filter according to claim 16, wherein a width of the pixel part is formed wider than the width of a opening part formed by the light shielding part. 25. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst containing layer and the decomposition removal layer are placed with a gap in a range of 0.2 μm to 10 μm. 26. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst containing layer side substrate comprises the base member and the photocatalyst containing layer formed in a pattern on the base member. 27. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst containing layer side substrate comprises a base member, a photocatalyst containing layer formed on the base member, and a photocatalyst containing layer side light shielding part formed in a pattern, and wherein the energy irradiation in the energy irradiating process is carried out from the photocatalyst containing layer side substrate. 28. The method for manufacturing a color filter according to claim 27, wherein the photocatalyst containing layer side substrate comprises the photocatalyst containing layer formed on the base member, and the photocatalyst containing layer side light shielding part formed in a pattern on the photocatalyst containing layer. 29. The method for manufacturing a color filter according to claim 29, wherein the photocatalyst containing layer side substrate comprises the photocatalyst containing layer side light shielding part formed in a pattern on the base member, and furthermore, the photocatalyst containing layer formed thereon. 30. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst containing layer side substrate comprises the photocatalyst containing layer formed on the photocatalyst containing layer side light shielding part formed in a pattern on the transparent base material via a primer layer. 31. The method for manufacturing a color filter according to claim 16, wherein a spacer having the thickness in a range of 0.2 μm to 10 μm is formed in a pattern on the photocatalyst containing layer in the photocatalyst containing layer side substrate, and the energy irradiation is carried out with the spacer and the decomposition removal layer being in contact. 32. The method for manufacturing a color filter according to claim 16, wherein the spacer is the photocatalyst containing layer side light shielding part formed with a light shielding material. 33. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst containing layer is a layer consisting of a photocatalyst. 34. The method for manufacturing a color filter according to claim 33, wherein the photocatalyst containing layer is a layer formed by forming a film of a photocatalyst on the base member by a vacuum film formation method. 35. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst containing layer is a layer having a photocatalyst and a binder. 36. The method for manufacturing a color filter according to claim 16, wherein the photocatalyst is one kind or two or more substances selected from a titanium oxide (TiO2), a zinc oxide (ZnO), a tin oxide (SnO2), a strontium titanate (SrTiO3), tungsten oxide (WO3), bismuth oxide (Fe2O3), and an iron oxide (Fe2O3). 37. The method for manufacturing a color filter according to claim 36, wherein the photocatalyst is a titanium oxide (TiO2). 38. The method for manufacturing a color filter according to claim 16, wherein the energy irradiation is carried out while heating the photocatalyst containing layer. 39. The method for manufacturing a color filter according to claim 16, wherein the light shielding part is made of a resin. 40. A color filter comprising a transparent base material, a pixel part provided on the transparent base material in a predetermined pattern with a plurality of colors by an ink jet method, a light shielding part provided on the boundary part of the pixel part, and a decomposition removal layer capable of being decomposed and removed by the photocatalyst, provided for forming the pixel part or the light shielding part. 41. A color filter comprising a transparent base material, a pixel part provided on the transparent base material in a predetermined pattern with a plurality of colors by the ink jet method, a light shielding part provided on the boundary part of the pixel part, and a decomposition removal layer capable of being decomposed and removed by the function of the photocatalyst formed on the light shielding part. 42. A liquid crystal display comprising a color filter manufactured by the method for manufacturing a color filter according to claim 16, a substrate facing the same, and a liquid crystal compound sealed in between the both substrates.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a color filter suitable for a color liquid crystal display. 2. Description of the Related Art Recently, accompanied by development of the personal computers, in particular, development of the portable personal computers, demand to the liquid crystal displays, particularly color liquid crystal displays tends to be increasing. However, since the color liquid crystal displays are expensive, cost down is highly requested. In particular, cost down to the color filters, which accounts for a large proportion in terms of the cost, is highly requested. In general, such a color filter comprises coloring patterns of the three primary colors including red (R), green (G) and blue (B). The liquid crystal functions as a shutter by switching electrodes corresponding each pixel of R, G, and B on or off, thereby light pass through each pixel of R, G, and B so that the color display is carried out. As the methods for manufacturing a color filter conventionally executed, for example, a dying method can be presented. In the dying method, a colored pattern is obtained by first forming a water soluble polymer material, as the dying material, on a glass substrate, patterning the same into a desired shape by a photolithography process, and then soaking the obtained pattern in a dye bath. By repeating the same for three times, R, G, and B color filter layers are formed. Moreover, as another method, a pigment dispersion method can be presented. In the method, a single color pattern is obtained by first forming a pigment dispersed photo sensitive resin layer on a substrate, and patterning the same. By repeating this process for three times, R, G, and B color filter layers are formed. As still another method, an electro deposition method, a method of dispersing a pigment in a thermosetting resin, printing three times for R, G, and B, and thermally curing the resin, or the like can be presented. However, in any method, the same process should be repeated for three times for coloring the three colors of R, G, and B, a problem of a high cost, and a problem of the yield deterioration due to the process repetition are involved. Moreover, a method for manufacturing a pattern formed body, or the like, of forming a pattern using a wettability changeable substance by the function of a photocatalyst has been discussed by the present inventors. However, in the methods for manufacturing a pattern formed body by the function of a photocatalyst so far, since the photocatalyst is included in the pattern formed body to be manufactured, a problem of possibility of being influenced by the photocatalyst, depending on the kind of the pattern formed body, has been involved. SUMMARY OF THE INVENTION In view of the above mentioned, provision of a method for manufacturing a color filter, capable of forming a highly sophisticated pattern easily at a low cost is desired. The present invention provides a method for manufacturing a color filter comprising: (1) forming a light shielding part on a transparent base material; (2) forming a wettability changeable layer, which a wettability changes by a function of a photocatalyst, on a surface of the transparent base material on a side which the light shielding part is formed; (3) placing a photocatalyst containing layer of a photocatalyst containing layer side substrate, which is the photocatalyst containing layer containing a photocatalyst formed on a base member, and the wettability changeable layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a pixel part forming part, in a pattern, comprising a lyophilic area where the contact angle to a liquid is lowered compared with a state before the energy irradiation to the wettability changeable layer; and (4) coloring the pixel part forming part by an ink jet method so as to form a pixel part (hereinafter, it is referred to as the first embodiment). In this embodiment, since the wettability changeable layer is provided on the transparent base material with the light shielding part formed preliminarily, and the energy is irradiated after placing the photocatalyst containing layer side substrate so as to face the wettability changeable layer, only the part where the pixel part is formed can easily be made lyophilic. Therefore, by adhering an ink by the ink jet method to the pixel part forming part for forming the pixel part, a pixel part with the ink adhered evenly can be obtained so that a color filter without color omission or color irregularity can be formed. Moreover, since the wettability changeable layer does not include a photocatalyst, the manufactured color filter does not include a photocatalyst so that an advantage can be provided that no problem derives from the influence of the photocatalyst in any pattern of a color filter. In the above mentioned first embodiment, the method may comprise: after adjusting the wettability changeable layer, placing a photocatalyst containing layer of a photocatalyst containing layer side substrate, which is the photocatalyst containing layer containing a photocatalyst formed on a base member, and the wettability changeable layer with a gap of 200 μm or less, and irradiating an energy from a predetermined direction to form a liquid repellent convex part fo