WO2010092688A1 - 色変換フィルタの製造方法 - Google Patents
色変換フィルタの製造方法 Download PDFInfo
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- WO2010092688A1 WO2010092688A1 PCT/JP2009/052502 JP2009052502W WO2010092688A1 WO 2010092688 A1 WO2010092688 A1 WO 2010092688A1 JP 2009052502 W JP2009052502 W JP 2009052502W WO 2010092688 A1 WO2010092688 A1 WO 2010092688A1
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- color filter
- color conversion
- color
- layer
- ink
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/125—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
- H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
Definitions
- the present invention relates to a method for manufacturing a color conversion filter.
- the present invention relates to a method for manufacturing a color conversion filter including a color conversion layer having a highly accurate pattern.
- the color conversion method is a method for realizing multicolor by arranging a color conversion layer that absorbs light emitted from an organic EL element and performs wavelength distribution conversion to emit light having different wavelength distributions on the front surface of the organic EL element. It is.
- the color conversion method is easy to manufacture because it uses only one type of organic EL element (single color), and development to a large screen display is being actively studied.
- the color conversion method has an advantageous feature that a good color reproducibility can be obtained by further combining a color filter layer that transmits light in a specific wavelength range.
- JP-A-8-286033 proposes a structure in which a fluorescent dye is dispersed in a polymer resin (see Patent Document 1).
- the film thickness of the color conversion layer needs to be about 10 ⁇ m.
- special techniques such as a technique for flattening the irregularities on the upper surface of the color conversion layer and a technique for blocking moisture generated from the color conversion layer are required. To do. These points increase the cost of the display.
- Japanese Patent Laid-Open Nos. 2002-75643 and 2003-217859 describe color conversion that does not include a resin by using a dry process such as a vapor deposition method or a sputtering method.
- a method of forming a layer has been proposed (see Patent Documents 2 and 3). Although this method can form a color conversion layer having a thickness of 2 ⁇ m or less, it has a problem that high-definition (for example, 150 ppi or more) patterning is difficult.
- JP 2004-253179 A, JP 2006-73450 A, JP 2006-32010 A, and JP 2003-229261 A have proposed an inkjet method (see Patent Documents 4 to 7).
- the advantage of forming the color conversion layer using the ink jet method is that the use efficiency of the ink is very high, and thereby the cost of forming the color conversion layer can be suppressed.
- Japanese Patent Laid-Open No. 2000-353594 proposes a method of forming a bank on a substrate (see Patent Document 8).
- Japanese Unexamined Patent Publication No. 2000-353594 describes that it is important to control not only the shape of the bank but also the wettability of the bank surface in order to form a high-definition pattern.
- Japanese Patent Laid-Open No. 2000-353594 discloses (a) forming a bank using two kinds of materials having different wettability in order to control the wettability of the bank surface and form a high-definition pattern.
- the method includes a step, and (b) a step of performing a plasma treatment (fluorine plasma / oxygen plasma) treatment using a plurality of gases and controlling the mixing ratio of these gases.
- Japanese Patent Laid-Open No. 2003-229261 proposes a method using a wettability variable layer (see Patent Document 7).
- a wettability variable layer is formed so as to cover a substrate and a partition formed on the substrate, and the wettability variable layer is contacted with the substrate through the second substrate including the photocatalyst-containing layer. And exposing only the exposed portion to improve the lyophilicity of the wettability variable layer in the exposed region with respect to the ink.
- a mask that is aligned with the partition wall in the exposure process is required. Therefore, the process is complicated.
- Japanese Patent Laid-Open No. 2005-156739 discloses a pattern including a liquid repellent part and a lyophilic part by performing pattern exposure on a layer containing an organic polysiloxane as a photocatalyst and a liquid repellent imparting agent. A method for producing a formed body is proposed (see Patent Document 10).
- Japanese Patent Application Laid-Open No. 2005-156739 describes that a color filter, a metal wiring, an organic EL layer, a biochip and the like can be produced on the pattern formed body.
- the problem to be solved by the present invention is to adjust the interaction between the underlying color filter layer and the color conversion forming ink droplets and to easily form a color conversion layer having a high-definition pattern. Is to provide a simple method.
- the method for producing a color conversion filter according to the present invention comprises: (1) a transparent substrate, a plurality of types of color filter layers composed of polysiloxane and a pigment, and a resin at a boundary between different color filter layers Forming a bank to provide a color filter; (2) performing an oxygen plasma treatment on the color filter; and (3) performing a fluorine plasma treatment on the color filter; (4) including a step of forming one or a plurality of color conversion layers on the color filter layer of the color filter using an inkjet method.
- the present invention also relates to a color conversion filter manufactured by the above method.
- oxygen and fluorine plasma treatment is performed on the color filter layer based on polysiloxane and the resin bank, thereby providing a parent of the color filter layer for the color conversion layer forming ink. It is possible to provide a novel method for producing a color conversion filter that combines a liquid property and a liquid repellency of a bank and includes a color conversion layer having a high-definition pattern using an inkjet method.
- the color conversion filter manufactured by the method of the present invention can be used to reduce the manufacturing cost of a flat panel display having high definition.
- FIG. 1 is a sectional view showing a color conversion filter formed by the manufacturing method of the present invention.
- FIG. 1 shows a color conversion filter formed by the manufacturing method of the present invention.
- the color conversion filter of FIG. 1 is provided on the transparent substrate 1 at the boundary of a black matrix 2, three types of color filter layers 3 (R, G, B) of red, green and blue, and different color filter layers 3. Covering the bank 4, the two color conversion layers 5 (R, G) of red and green provided on the red and green color filter layers 3 (R, G), and the layers below the color conversion layer 5
- the barrier layer 6 is formed as described above.
- a black matrix 2 is formed on the transparent substrate 1 as an optional step.
- the black matrix 2 may be formed by patterning using a photolithographic method or the like after being formed on the entire surface of the transparent substrate 1 using a coating method (spin coating or the like), or using a screen printing method or the like. It may be formed in a pattern.
- the transparent substrate 1 is preferably formed of a material that satisfies the following conditions: (A) having excellent light transmission and dimensional stability; (B) endure the conditions (solvent, temperature, etc.) used to form the layers (black matrix 2, color filter layer 3, color conversion layer 5, etc.) formed thereon; (C) When an organic EL element is formed on a color conversion filter, it must withstand the conditions (solvent, temperature, etc.) used to form the organic EL element; and (d) formed using the obtained color conversion filter. Do not cause performance degradation of the multicolor light emitting display.
- Examples of the material for forming the transparent substrate 1 include glass, various plastics, various films, and the like.
- the black matrix 2 is a layer for blocking visible light and improving contrast.
- the film thickness of the black matrix 2 can be arbitrarily set as long as the above functions are satisfied.
- the black matrix 2 may be composed of a plurality of stripe-shaped portions extending in the first direction.
- the black matrix 2 is an integrated unit having a lattice-like shape having a plurality of openings, which is composed of stripe-shaped portions extending in a first direction and a second direction (a direction orthogonal to the first direction). It may be a layer. In this case, the openings of the black matrix 2 define subpixels.
- the black matrix 2 can be formed using a normal flat panel display material.
- a bank 4 is formed on the transparent substrate 1 at a boundary between a plurality of types of color filter layers 3 and different types of color filter layers 3 to obtain a color filter.
- a bank 4 is formed at a portion that becomes a boundary between different color filter layers 3.
- the bank 4 is formed on the transparent substrate 1 when the black matrix 2 is not provided, and on the black matrix 2 when the black matrix 2 is provided.
- the bank 4 may be composed of, for example, a plurality of stripe portions extending in the first direction.
- the bank 4 is effective in preventing the ink for forming the color conversion layer 5 from diffusing into an undesired region.
- the bank 4 is effective when a color conversion layer having a high-definition pattern is formed by an inkjet method.
- a high-definition pattern it is necessary to lower the viscosity of the ink in order to eject droplets while precisely controlling the ejection volume, and the solid content of the ink causes thickening of the ink. Cannot be increased. Therefore, the volume of ink for obtaining a color conversion layer having a required film thickness is inevitably large, and prevention of diffusion by the bank 4 is important.
- the bank 4 is effective in preventing the ink for forming the color filter layer 3 from diffusing into an undesired region.
- the transparent substrate 1, the bank 4, and the black matrix 2, if present are subjected to a fluorine plasma treatment to form an ink for forming the color filter layer 3.
- the bank 4 and the black matrix 2 may be liquid repellent.
- the bank 4 desirably has liquid repellency with respect to ink for forming the color conversion layer 5 described later.
- the material for forming the bank 4 includes a resin, in particular, a photocurable resin or a photothermosetting resin (for example, an acrylic resin including a curable portion).
- the bank 4 may be formed by applying these materials to the entire surface and then performing patterning, or may be formed by attaching these materials only to desired portions using a screen printing method or the like.
- each of the plurality of types of color filter layers 3 is also composed of a plurality of stripe portions extending in the first direction.
- the plurality of types of color filter layers 3 are layers for transmitting light in different wavelength ranges, setting the transmitted light to a desired hue, and improving the color purity of the transmitted light.
- a blue color filter layer 3B that transmits light in the wavelength range of 400 nm to 550 nm
- a green color filter layer 3G that transmits light in the wavelength range of 500 nm to 600 nm, and 600 nm or more. It is desirable to form the red color filter layer 3R that transmits light in the wavelength region of.
- the color filter layer 3 of the present invention is formed from a polysiloxane material and an organic pigment dispersed in the polysiloxane material.
- the organic pigment is dispersed in the polysiloxane material in an amount of 1 to 20% by weight, preferably 1 to 10% by weight, based on the weight of the polysiloxane material.
- the polysiloxane material is formed by hydrolytic condensation or cohydrolytic condensation of monomers (precursors) such as organic dialkoxysilanes, organic dialcyloxysilanes, and organic dialkoxysilanes.
- monomers such as organic dialkoxysilanes, organic dialcyloxysilanes, and organic dialkoxysilanes.
- Organic dialkoxysilanes that can be used are dimethyldimethoxysilane, dimethyldiethoxysilane, diphenyldimethoxysilane, diphenyldiethoxysilane, methylphenyldimethoxysilane, methylvinyldimethoxysilane, methylvinyldiethoxysilane, 3-glycidoxy Propylmethyldimethoxysilane, 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane
- Organic diacyloxysilanes that can be used include dimethyldiacetoxysilane, diphenyldiacetoxysilane, and the like.
- Organic diacyloxysilanes that can be used include dimethyldichlorosilane, diethyldichlorosilane, diphenyldichlorosilane, methylphenyldichlorosilane, methylvinyldichlorosilane, octadecylmethyldichlorosilane, heptadecafluorodecylmethyldichlorosilane, and the like.
- Hydrolytic condensation or cohydrolytic condensation can be carried out by mixing one or more monomers under aqueous conditions in the presence of an acid catalyst.
- hydrolysis condensation or cohydrolysis condensation of the precursor can be performed on the transparent substrate 1 by heating to 150 ° C. for 30 minutes, for example.
- Organic pigments that can be used in the color filter layer 3 are azo lake pigments, insoluble azo pigments, condensed azo pigments, phthalocyanine pigments, quinacridone pigments, dioxazine pigments, isoindolinone pigments, anthraquinone pigments, perinones. Pigments, thioindico pigments, perylene pigments, or mixtures thereof.
- the color filter layer 3 is produced by attaching a dispersion of a polysiloxane material or a precursor thereof and an organic pigment onto the transparent substrate 1 using an ink jet method, a screen printing method, or the like.
- the precursor of the polysiloxane material is used, the polysiloxane is formed by performing hydrolysis condensation or cohydrolysis condensation on the transparent substrate 1.
- an oxygen plasma treatment is performed on the color filter (that is, the transparent substrate 1 on which the color filter layer 3 and the bank 4 are formed), and the color filter layer 3 is applied to the ink for forming the color conversion layer 5. Make the surface of lyophilic.
- This step can be omitted when the color filter layer 3 is sufficiently formed and has sufficient lyophilicity for the ink for forming the color conversion layer 5.
- the “oxygen plasma treatment” in the present invention is a reduced pressure plasma treatment in which plasma irradiation is performed in a reduced pressure atmosphere at a pressure of 1 to 10 Pa.
- the flow rate of oxygen gas can be set to 50 to 1000 mL / min, and the applied power can be set to 50 to 1000 W.
- the contact angle of the surface of the color filter layer 3 with respect to the ink for forming the color conversion layer 5 is preferably set to 15 ° or less by oxygen plasma treatment.
- a fluorine plasma treatment is performed on the color filter to make the bank 4 liquid repellent with respect to the ink for forming the color conversion layer 5.
- the fluorine plasma treatment in the present invention is an atmospheric pressure plasma treatment in which plasma is irradiated in a gas containing fluorine or a fluorine compound at approximately atmospheric pressure.
- the fluorine plasma treatment can be performed using a known surface treatment apparatus. Fluorine compounds that can be used include CF 4 , CHF 3 , SF 6 and the like.
- the gas used for the fluorine plasma treatment is a gas in which Ar or He gas is mixed with 1 to 10%, preferably 2 to 5% of fluorine or a fluorine compound.
- the contact angle of the surface of the bank 4 with respect to the ink for forming the color conversion layer 5 is preferably set to 30 ° or more by the fluorine plasma treatment.
- the surface of the color filter layer 3 that has been subjected to the oxygen plasma treatment maintains lyophilicity with respect to the ink even by the fluorine plasma treatment, and does not repel water.
- FIG. 1 shows an example in which the red conversion layer 5R and the green conversion layer 5G are formed. If necessary, only the red color conversion layer 5R may be provided. Alternatively, a blue conversion layer (not shown) may be provided in addition to the red conversion layer 5R and the green conversion layer 5G.
- the ink for forming the color conversion layer 5 includes at least one color conversion pigment and a solvent.
- Color conversion dyes that can be used in the present invention include aluminum chelate dyes such as tris (8-quinolinolato) aluminum complex (Alq 3 ); 3- (2-benzothiazolyl) -7-diethylaminocoumarin (coumarin 6), 3- (2-benzimidazolyl) -7-diethylaminocoumarin (coumarin 7), coumarin dyes such as coumarin 135; and low molecular organic fluorescent dyes such as naphthalimide dyes such as Solvent Yellow 43 and Solvent Yellow 44.
- polymeric fluorescent materials typified by polyphenylene, polyarylene and polyfluorene may be used as the color conversion dye.
- a mixture of two or more dyes may be used as the color conversion dye.
- the use of a dye mixture is an effective means when the wavelength shift width is wide, such as when converting from blue light to red light.
- the dye mixture may be a mixture of the aforementioned dyes.
- the aforementioned dye and the following dye (1) quinacridone derivatives such as diethylquinacridone (DEQ); (2) 4-dicyanomethylene-2-methyl-6- (p-dimethylaminostyryl) -4H-pyran (DCM-1), 4-dicyanomethylene-2-methyl-6- (julolidine-9-enyl)- Such as 4H-pyran (DCM-2), and 4-dicyanomethylene-2-t-butyl-6- (1,1,7,7-tetramethyljulolidine-9-enyl) -4H-pyran (DCJTB) Cyanine dyes; (3) 4,4-difluoro-1,3,5,7-tetraphenyl-4-bora-3a, 4a-diaza-s-indacene; (4) Lummogen F Red; (5) Nile Red; (6) A xanthene dye such as rhodamine B or rhodamine 6G; or (7) a mixture with a pyr
- any solvent that can dissolve the color conversion pigment can be used.
- a nonpolar organic solvent such as toluene, or a polar organic solvent such as chloroform, alcohol, or ketone can be used as the ink solvent.
- the ink solvent may be composed of a single component.
- an ink solvent may be prepared by mixing a plurality of solvents for the purpose of adjusting viscosity, vapor pressure, solubility and / or wettability.
- an ink can be produced by mixing at least one color conversion dye in a solvent.
- a solvent for example, nitrogen gas or a rare gas such as argon
- an inert gas for example, nitrogen gas or a rare gas such as argon
- any means known in the art such as degassing, treatment with a water absorbent, treatment with an oxygen absorbent, distillation, etc., is used to remove moisture and oxygen in the solvent.
- the solvent may be pretreated.
- the prepared ink is separated from the different color filter layers 3 in the bank 4 using any ink jet apparatus and method known in the art, provided that it can be applied at the desired resolution. Then, it is deposited on the color filter layer 3 subjected to the plasma treatment.
- the inkjet apparatus and method may be a thermal inkjet system or a piezo inkjet system. The ink deposited using the ink jet method is prevented from diffusing by the bank 4 to areas other than necessary, and at the same time, the ink spreads on the color filter layer 3 without being repelled.
- the solvent is removed by evaporation to form a color conversion layer 5 made of at least one color conversion dye.
- the color conversion layer 5 is formed in a region sandwiched between two banks.
- the bank 4 is composed of a plurality of stripe-shaped portions extending in the first direction
- the color conversion layer 5 is also composed of a plurality of stripe shapes extending in the first direction.
- the removal of the solvent can be carried out by heating to a temperature at which the solvent evaporates in the aforementioned inert gas atmosphere or in vacuum. At this time, it is desirable to set the heating temperature so that the color conversion pigment in the ink does not deteriorate or decompose.
- a barrier layer 6 may be formed so as to cover the black matrix 2, the color filter layer 3, the bank 4, and the color conversion layer 5.
- the formation of the barrier layer 6 is a step that may optionally be performed.
- the barrier layer 6 is effective in maintaining the characteristics of the color conversion layer 5 when the color conversion layer 5 is formed using a material that deteriorates due to the presence of water, oxygen, and / or an organic solvent.
- the barrier layer 6 is formed using a material (having a transmittance of 50% or more in the range of 400 to 700 nm) that has a barrier property against gas (including water vapor and oxygen) and an organic solvent and is highly transparent in the visible range. can do.
- the material of the barrier layer 6 is desirably electrically insulating. Materials that can be used to form the barrier layer 6 can, for example, SiO x, AlO x, TiO x, TaO x, inorganic oxides such as ZnO x, inorganic nitrides such as SiN x, and such SiN x O y Inorganic oxynitride is included.
- the barrier layer 6 may be a single layer of the above-described material or a laminate of a plurality of layers.
- the barrier layer 6 can be formed by any method known in the art such as sputtering, CVD, and vacuum deposition. In terms of avoiding damage to the color conversion layer 5 during the formation of the barrier layer 6, a CVD method that can be performed at a low temperature of 100 ° C. or less and that has low energy of particles used for film formation, It is desirable to form the barrier layer 6.
- the manufacturing method of the present invention has been described by taking the color conversion filter shown in FIG. 1 having three kinds of color filter layers 3 and two kinds of color conversion layers 5 as an example. It will be apparent to those skilled in the art that the manufacturing method of the present invention can also be applied to a color conversion filter having two or more color filter layers 3.
- Example 1 A color mosaic CK-7001 (available from Fuji Film Co., Ltd.) is applied on a transparent substrate 1 (Corning 1737 glass), and a black matrix 2 having a plurality of rectangular openings is formed using a photolithographic method. Formed.
- the black matrix 2 had a film thickness of 1 ⁇ m.
- Each of the rectangular openings (corresponding to sub-pixels) had a vertical direction of 300 ⁇ m ⁇ a horizontal direction of 100 ⁇ m, and the interval between adjacent rectangular openings was 30 ⁇ m in the vertical direction and 10 ⁇ m in the horizontal direction.
- a photocurable acrylic resin (V259PA / P5, manufactured by Nippon Steel Chemical Co., Ltd.) is applied, patterned by a photolithography method, and a bank 4 composed of a plurality of stripe-shaped portions extending in the vertical direction on the black matrix 2.
- Each of the stripe-shaped portions constituting the bank 4 formed with a width of 10 ⁇ m and a height of 5 ⁇ m.
- a gas in which 3% CF 4 is mixed in Ar gas is introduced into an ATOMFLO apparatus (manufactured by Surfex Co., Ltd.) under atmospheric pressure, and the transparent substrate 1 in which the black matrix 2 and the bank 4 are formed is introduced.
- the plasma was irradiated.
- the distance between the transparent substrate 1 and the plasma irradiation port was set to 1 cm.
- dimethyldimethoxysilane was mixed with 3% by mass of chromophthaled red BRN (Ciba Geigy's red pigment: disazo pigment) to prepare a red color filter material.
- the obtained red color filter material was adhered using an ink jet method to form a red color filter layer 3R composed of a plurality of stripe-shaped portions extending in the vertical direction.
- Each of the plurality of stripe-shaped portions had a film thickness of 1 ⁇ m and a width of 110 ⁇ m.
- each of the plurality of stripe-shaped portions was arranged at intervals of 220 ⁇ m with both side edges of the stripe-shaped portion contacting the black matrix 2 and the bank 4.
- dimethyldimethoxysilane was converted to polysiloxane by heating to 150 ° C. for 30 minutes.
- the color filter was placed in the plasma processing apparatus, and the inside of the apparatus was depressurized to 2 Pa. While supplying oxygen at a flow rate of 100 mL / min to the apparatus, 100 W electric power was applied and oxygen plasma treatment was performed for 10 seconds.
- a gas in which 3% CF 4 is mixed in Ar gas is introduced into an ATOMFLO apparatus (manufactured by Surfex Co., Ltd.) under atmospheric pressure, and the transparent substrate 1 in which the black matrix 2 and the bank 4 are formed is introduced.
- ATOMFLO apparatus manufactured by Surfex Co., Ltd.
- plasma was irradiated.
- the distance between the transparent substrate 1 and the plasma irradiation port was set to 1 cm.
- the color filter formed with the green conversion layer 5G and the red conversion layer 5R was moved into the plasma CVD apparatus without breaking the vacuum.
- silicon nitride (SiN) having a thickness of 1 ⁇ m was deposited to form a barrier layer 6 to obtain a color conversion filter.
- monosilane (SiH 4 ), ammonia (NH 3 ), and nitrogen (N 2 ) were used as source gases.
- the temperature of the color filter when the barrier layer 6 was formed was maintained at 100 ° C. or lower.
- ⁇ Comparative example 2> A color conversion filter was produced by repeating the procedure of Example 1 except that the oxygen plasma treatment was not performed on the color filter.
- the occurrence rate of unevenness and the presence or absence of color mixing were evaluated.
- the term “unevenness” in the present invention means that there is a region where no color conversion layer is formed in the red and green sub-pixels as a result of ink repelling.
- the “unevenness occurrence rate” means the ratio of the number of subpixels where “unevenness” has occurred to the total number of red and green subpixels.
- “mixed color” refers to the formation of one of the red color conversion layer 5R and the green color conversion layer 5G at an undesired position by going over the bank 4 and wrapping around the other adjacent color region.
- Example 1 Means that Further, the color filter material and the bank material used in Example 1 and Comparative Examples 1 to 3 were applied to another substrate, subjected to the same plasma treatment as in each example, and the contact angle of toluene on the surface was measured. The results are shown in Table 1.
- Example 1 in which two types of plasma treatment were applied to the color filter layer based on polysiloxane, the occurrence of unevenness can be suppressed, and the color for the ink for forming the color conversion layer can be reduced. It can be seen that the lyophilicity of the filter layer 3 has been improved. It can also be seen that color mixing due to overcoming the bank does not occur, and the liquid repellency of the bank 4 with respect to the color conversion layer forming ink is improved. By combining liquid repellency and lyophilicity, it is considered that the occurrence rate of unevenness was reduced and color mixing did not occur as compared with Comparative Example 1 using a color filter layer based on an organic resin. .
- Comparative Example 2 Although no color mixing occurred, but showed a high unevenness occurrence rate, it was possible to perform oxygen plasma treatment on the color filter layer based on polysiloxane to form the color conversion layer. It turns out that it is important for the improvement of the lyophilicity with respect to the ink. Further, the comparison between Example 1 and Comparative Example 3 shows that the fluorine plasma treatment before the color conversion layer formation is important in improving the liquid repellency of the bank 4 and preventing color mixing.
- the color filter layer based on polysiloxane and the resin bank by using the color filter layer based on polysiloxane and the resin bank and performing the oxygen and fluorine plasma treatment, the lyophilicity of the color filter layer with respect to the color conversion layer forming ink and the bank It was possible to provide a novel method for producing a color conversion filter that has both liquid repellency and includes a color conversion layer having a high-definition pattern using an inkjet method.
- the color conversion filter manufactured by the method of the present invention can be used to reduce the manufacturing cost of a flat panel display having high definition.
Abstract
Description
2 ブラックマトリクス
3(R,G,B) カラーフィルタ層
4 バンク
5(R,G) 色変換層
6 バリア層
(a)優れた光透過性および寸法安定性を有すること;
(b)その上に形成される層(ブラックマトリクス2、カラーフィルタ層3、色変換層5など)の形成に用いられる条件(溶媒、温度等)に耐えること;
(c)色変換フィルタの上に有機EL素子を形成する場合、有機EL素子の形成に用いられる条件(溶媒、温度等)に耐えること;および
(d)得られた色変換フィルタを用いて形成される多色発光ディスプレイの性能低下を引き起こさないこと。
透明基板1を形成するための材料の例は、ガラス、各種プラスチック、各種フィルムなどを含む。
(1) ジエチルキナクリドン(DEQ)などのキナクリドン誘導体;
(2) 4-ジシアノメチレン-2-メチル-6-(p-ジメチルアミノスチリル)-4H-ピラン(DCM-1)、4-ジシアノメチレン-2-メチル-6-(ジュロリジン-9-エニル)-4H-ピラン(DCM-2)、および4-ジシアノメチレン-2-t-ブチル-6-(1,1,7,7-テトラメチルジュロリジン-9-エニル)-4H-ピラン(DCJTB)などのシアニン色素;
(3) 4,4-ジフルオロ-1,3,5,7-テトラフェニル-4-ボラ-3a,4a-ジアザ-s-インダセン;
(4) ルモゲンFレッド;
(5) ナイルレッド;
(6) ローダミンB、ローダミン6Gなどのキサンテン系色素;または
(7) ピリジン1などのピリジン系色素
との混合物であってもよい。
透明基板1(コーニング社製1737ガラス)上に、カラーモザイクCK-7001(富士フィルム株式会社から入手可能)を塗布し、フォトリソグラフ法を用いて、複数の矩形状開口部を有するブラックマトリクス2を形成した。ブラックマトリクス2は、1μmの膜厚を有した。矩形状開口部のそれぞれ(サブピクセルに相当する)は、縦方向300μm×横方向100μmを有し、隣接する矩形状開口部間の間隔は、縦方向30μmおよび横方向10μmであった。
ジメチルジメトキシシランと各色顔料との混合物に代えて、有機樹脂を含むカラーモザイクCR-7001、CG-7001およびCB-7001(富士フィルム株式会社から入手可能)を塗布し、フォトリソグラフ法を用いてパターニングして、赤色、緑色および青色カラーフィルタ層3(R,G,B)を形成したことを除いて、実施例1の手順を繰り返して、色変換フィルタを形成した。
カラーフィルタに対する酸素プラズマ処理を実施しなかったことを除いて、実施例1の手順を繰り返して、色変換フィルタを作製した。
カラーフィルタに対するフッ素プラズマ処理を実施しなかったことを除いて、実施例1の手順を繰り返して、色変換フィルタを作製した。
実施例1および比較例1~3で作製された色変換フィルタにおいて、ムラ発生率および混色の発生の有無を評価した。本発明における「ムラ」とは、インクがはじかれた結果として、赤色および緑色のサブピクセル内に色変換層が形成されていない領域が存在することを意味する。また、「ムラ発生率」は、赤色および緑色のサブピクセルの全数に対する、「ムラ」が発生したサブピクセル数の比率を意味する。また、本発明における「混色」とは、バンク4を乗り越えて、インクが隣接する他の色の領域に回り込んで、赤色変換層5Rまたは緑色変換層5Gのいずれかが、所望されない位置に形成されたことを意味する。また、実施例1および比較例1~3で用いたカラーフィルタ材料およびバンク材料を別の基板に塗布し、各例と同様のプラズマ処理を施して、その表面のトルエンに対する接触角を測定した。結果を第1表に示す。
Claims (2)
- 透明基板の上に、ポリシロキサンおよび顔料から構成される複数種のカラーフィルタ層、および異種のカラーフィルタ層の境界となる部分に樹脂から構成されるバンクを形成して、カラーフィルタを提供する工程と、
該カラーフィルタに対して酸素プラズマ処理を行う工程と、
該カラーフィルタに対してフッ素プラズマ処理を行う工程と、
該カラーフィルタのカラーフィルタ層の上に、インクジェット法を用いて1つまたは複数種の色変換層を形成する工程と
を含むことを特徴とする色変換フィルタの製造方法。 - 請求項1の方法で製造された色変換フィルタ。
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US12/994,183 US8520331B2 (en) | 2009-02-16 | 2009-02-16 | Color conversion filter manufacturing method |
KR1020107013905A KR20100105625A (ko) | 2009-02-16 | 2009-02-16 | 색변환 필터의 제조 방법 |
CN2009801035452A CN101933396A (zh) | 2009-02-16 | 2009-02-16 | 色变换滤光片的制造方法 |
JP2010519289A JPWO2010092688A1 (ja) | 2009-02-16 | 2009-02-16 | 色変換フィルタの製造方法 |
PCT/JP2009/052502 WO2010092688A1 (ja) | 2009-02-16 | 2009-02-16 | 色変換フィルタの製造方法 |
TW099103969A TWI457613B (zh) | 2009-02-16 | 2010-02-09 | Production method of color conversion filter |
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JP (1) | JPWO2010092688A1 (ja) |
KR (1) | KR20100105625A (ja) |
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JP2019040179A (ja) * | 2017-08-24 | 2019-03-14 | Jsr株式会社 | 積層体、および積層体を含む表示装置 |
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KR102374845B1 (ko) * | 2014-11-10 | 2022-03-17 | 엘지디스플레이 주식회사 | 컬러필터 어레이 기판 및 그 제조방법과 이를 이용한 유기전계발광 표시장치 |
KR102289987B1 (ko) | 2015-03-26 | 2021-08-17 | 삼성디스플레이 주식회사 | 색필터 표시판 및 이를 포함하는 액정 표시 장치 |
KR102386848B1 (ko) * | 2015-04-13 | 2022-04-15 | 삼성디스플레이 주식회사 | 표시장치 및 그 제조방법 |
KR102571631B1 (ko) * | 2015-11-30 | 2023-08-25 | 엘지디스플레이 주식회사 | 유기 발광 표시 장치 |
KR102393319B1 (ko) | 2017-07-04 | 2022-05-02 | 삼성디스플레이 주식회사 | 유기 발광 표시 장치 |
KR20200097379A (ko) * | 2019-02-07 | 2020-08-19 | 삼성디스플레이 주식회사 | 표시패널 및 그 제조방법 |
CN112799248A (zh) * | 2019-11-14 | 2021-05-14 | 成都辰显光电有限公司 | 光转换结构及其制备方法、显示面板、显示装置 |
CN112133734B (zh) * | 2020-09-29 | 2022-08-30 | 湖北长江新型显示产业创新中心有限公司 | 显示面板及显示装置 |
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- 2009-02-16 JP JP2010519289A patent/JPWO2010092688A1/ja active Pending
- 2009-02-16 CN CN2009801035452A patent/CN101933396A/zh active Pending
- 2009-02-16 KR KR1020107013905A patent/KR20100105625A/ko not_active Application Discontinuation
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KR20100105625A (ko) | 2010-09-29 |
TWI457613B (zh) | 2014-10-21 |
JPWO2010092688A1 (ja) | 2012-08-16 |
US20110128643A1 (en) | 2011-06-02 |
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