CN101373231B - Color filter, method for manufacturing color filter, and display device - Google Patents

Abstract

The invnetion provides a method for manufacturing a color filter, which includes an ink imparting step of imparting liquid drops of an ink-jet ink for a color filter by an ink-jet system to recessed portions surrounded by barrier walls formed on a substrate, and a baking step of treating the liquid drops, wherein the time interval between the ink imparting step and the baking step is set to one minute or more. Also provided are a color filter obtained by adopting the manufacturing method and a display device with the color filter.

Description

The manufacturing approach of color filter, color filter and display device

Technical field

Color filter that the present invention relates to use the manufacturing approach of the color filter of inkjet ink for color filter, obtained by this manufacturing approach and the display device that possesses this color filter.

Background technology

In recent years, be accompanied by personal computer, the particularly development of big picture LCD TV, there is the tendency that increases in the demand of LCD, especially colour liquid crystal display device.But because the price of colour liquid crystal display device is high, so requiring of reducing of cost is surging, and the requirement that particularly aspect cost, the cost of the high color filter of proportion is reduced is high.

In such color filter; Usually the colored pattern that possesses red (R), green (G) and blue (B) this 3 primary colors is connected, is broken off through making the electrode corresponding with each pixel of R, G and B, and liquid crystal is worked as shutter (shutter); Light carries out colour and shows through each pixel of R, G and B.

As existing manufacturing approach, for example can enumerate decoration method.This decoration method at first forms on glass substrate as the water-soluble high-molecular material of dyeing with material, and employing photoengraving operation impregnated in the pattern that obtains in the dye bath after it is formed the pattern of required form, obtains painted pattern.It is repeated 3 times, thus the color filter layer of formation R, G and B.

In addition, as additive method, the pigment dispersing method is arranged.This method at first forms the photo-sensitive resin that is dispersed with pigment on substrate, through it is formed pattern, obtain monochromatic pattern.Again this operation is carried out 3 times repeatedly, form the color filter layer of R, G and B.

In addition,, can also enumerate electrodeposition process, or make pigment dispersing in heat reactive resin, carry out making after R, G and B these the 3 times printing method etc. of resin heat curing as additive method.

But for this 3 chromatic colorant of R, G and B, any method all need be carried out same operation 3 times repeatedly, has the problem that cost raises or owing to carries out the problem that same operation makes the productive rate reduction repeatedly.

As the manufacturing approach of the color filter that solves these problems, thereby the method (for example, opening clear 59-75205 communique and Te Kai 2004-339332 communique with reference to the spy) that the spraying pigmented black liquid of employing ink-jetting style forms dyed layer (pixel portions) has been proposed.

For this color filter manufacturing approach that adopts ink-jetting style, have following problem: the pixel faces when being easy to generate black liquid ejection is in uneven thickness, and the ITO resistance value of the color filter of completion is risen, and can not obtain high-grade color filter.For this problem, proposed under high pressure to carry out the method (for example, opening the 2004-223354 communique) of black liquid ejection with reference to the spy.

Patent documentation 1: the spy opens clear 59-75205 communique

Patent documentation 2: the spy opens the 2004-339332 communique

Patent documentation 3: the spy opens the 2004-223354 communique

But for the method for under high pressure carrying out black liquid ejection, it is insufficient that the generation in uneven thickness of the pixel faces when black liquid sprays suppresses effect, pixel portions flatness existing problems.

Summary of the invention

The invention that the present invention proposes in view of above-mentioned existing problem just; Its purpose is, production efficiency and the pixel portions flatness that color filter is provided be manufacturing approach, the color filter that is obtained by this manufacturing approach and the display device with this color filter of excellent color filter all.

The result who studies with keen determination finds that be more than 1 minute through making black liquid ejection back until the time that bakes operation, can improve the problems referred to above.

The concrete grammar that is used to solve above-mentioned problem is described below.

< 1>manufacturing approach of color filter, it comprises: the black liquid that the recess that adopts ink-jetting style to surround to the next door that is formed on the substrate gives the drop of inkjet ink for color filter gives operation and above-mentioned drop is carried out the operation that bakes of heat treated; Above-mentioned black liquid gives operation and the above-mentioned time interval that bakes operation is more than 1 minute.

< 2>color filter of the manufacturing approach making of employing aforementioned < 1>described color filter.

< 3>possesses the display device of aforementioned < 2>described color filter.

According to the present invention, production efficiency and the pixel portions flatness that color filter can be provided be manufacturing approach, the color filter that is obtained by this manufacturing approach and the display device that possesses this color filter of excellent color filter all.

Description of drawings

Fig. 1 is the figure of 1 example that constitutes of the system of expression color filter manufacturing.

Fig. 2 is the figure of expression head details.

Fig. 3 is the most simply figure of voltage waveform of expression drive pressure electric device.

Fig. 4 is the figure of formation that expression is used to observe the shape of the drop that circles in the air.

Fig. 5 is the figure of the shape of the black drop when representing that bullet is put pen to paper drop successively.

Symbol description

100: head

101,102,103: ink gun

110: microphotographic camera

200: control part

300: substrate

400: the substrate platform

500: the head maintenance station

600: timing control part

602: piezoelectric voltage

603: the Piezoelectric Driving time width

604: the ejection frequency

610: the piezoelectricity wave generator circuit

620: variable delay circuit

621: retardation

The bright circuit for lamp of 630:LED

640: head

650：LED

660: microscope lens

The 661:CCD camera

670: monitor

Embodiment

Below manufacturing approach, color filter and the display device of the color filter of inkjet ink for color filter used of the present invention is elaborated.

< inkjet ink for color filter >

Inkjet ink for color filter of the present invention (following " inkjet ink ", " the black liquid " of abbreviating as sometimes) can be the inkjet ink for color filter that contains colorant, organic solvent and monomer at least.Above-mentioned inkjet ink for color filter; From the viewpoint of the flatness of color filter, preferably in the viscosity of the black liquid remnants of defeated troops that make that average thickness is that dry 8 hours obtain under 5mmHg (0.67kPa), 45 ℃ condition under the state of 1mm at 25 ℃ down for below the above 4000mPas of 40mPas.Wherein, so-called average thickness is meant the thickness that come out by container bottom area and black liquid volume calculations.In addition, as the physics value of black liquid, the preferred 20～100mPas of 25 ℃ viscosity, as 25 ℃ surface tension, preferred 10～50mN/m.In the scope of not damaging effect of the present invention, inkjet ink of the present invention can contain spreading agent, bonding agent, Photoepolymerizationinitiater initiater, thermal polymerization, surfactant or other adjuvants.

The flowability of the remnants of defeated troops (black liquid)

The above-mentioned black liquid remnants of defeated troops, further are preferably below the above 2000mPas of 50mPas more preferably below the above 3000mPas of 50mPas 25 ℃ viscosity, are preferably especially below the above 1000mPas of 50mPas.If the viscosity of the black liquid remnants of defeated troops is above-mentioned scope,, also can access smooth image portion (dyed layer) even after the organic solvent drying.

" black liquid the remnants of defeated troops " among so-called the present invention, be meant make average thickness be under the state of 1mm under 5mmHg (0.67kPa), 45 ℃ condition with the dry residue that obtained in 8 hours of inkjet ink for color filter.When using the determination of viscoelasticity device to measure the viscosity of the black liquid remnants of defeated troops; For example; Can inkjet ink for color filter being packed into, to receive to make in the ware average thickness be 1mm to aluminum; Under 45 ℃, carry out vacuum drying (0.67kPa) in 8 hours, use spoon the residue that obtains (black liquid the remnants of defeated troops) is collected by aluminum dish and to be supplied in test portion.Used the mensuration of the viscosity of determination of viscoelasticity device, can use the for example determination of viscoelasticity device Dyn Alyser DAS-100 of JascoInternational Co.Ltd system, under the condition of 25 ℃ of temperature, frequency 1Hz, measured.

Secondly, each contained in the inkjet ink among the present invention composition is elaborated.

(colorant)

The colorant that uses in the inkjet ink of the present invention; Can use known colorants such as organic pigment, inorganic pigment, dyestuff; But owing to requiring enough penetrating concentrations or photostability, adaptation, other all patience, therefore preferred various organic pigments with substrate.In addition, from the storage stability aspect of pixel, special preferred pigments.Concrete example as this colorant; Preferred pigment and the dyestuff that uses the spy to open record in 2005-17716 communique [0038]～[0054]; The spy opens the pigment of record in 2004-361447 communique [0068]～[0072], and the spy opens the colorant of record in 2005-17521 communique [0080]～[0088].

Content to colorant among the present invention does not have special qualification; From obtaining required form and aspect, the viewpoint of concentration, colorant in the black liquid remnants of defeated troops more than the shared preferred 20 quality % of ratio, 20～70 quality % more preferably; Further preferred 25～60 quality %, preferred especially 30～50 quality %.

In the present invention, as and with the combination of the pigment of preferred above-mentioned record, for C.I. paratonere 254, can enumerate combination with C.I. paratonere 177, C.I. paratonere 224, C.I. pigment yellow 13 9 or C.I. pigment Violet 23; For the C.I. pigment green 36, can enumerate combination with C.I. pigment yellow 150, C.I. pigment yellow 13 9, C.I. pigment yellow 185, C.I. pigment yellow 13 8 or C.I. pigment yellow 180; For the C.I. pigment blue 15: 6, can enumerate combination with C.I. pigment Violet 23 or C.I. pigment blue 60.

C.I. paratonere 254, C.I. pigment green 36, C.I. pigment blue 15 in nine so also time spent pigment: 6 content, C.I. paratonere 254 are preferably more than the 60 quality %, are preferably especially more than the 70 quality %.C.I. pigment green 36 is preferably more than the 50 quality %, is preferably especially more than the 60 quality %.C.I. pigment blue 15: 6 are preferably more than the 80 quality %, are preferably especially more than the 90 quality %.

The pigment that uses in the present invention, from the viewpoint that dispersion stabilization and contrast have concurrently, preferably number average bead diameter is the pigment of 0.001～0.1 μ m, more preferably the pigment of 0.01～0.08 μ m.Moreover said here " particle diameter " is meant with the electron micrograph image of particle as the diameter with the bowlder of area.In addition, so-called " number average bead diameter " is meant for a plurality of particles and obtains above-mentioned particle diameter, its mean value of 100.

Above-mentioned pigment optimization uses as dispersion liquid.This dispersion liquid can through in advance with above-mentioned pigment with after the pigment dispersing agent stated mix the composition dispersion of using known dispersion machine to make to obtain and modulating with organic solvent.At this moment, in order to give dispersing of pigments stability, can add a spot of resin.In addition, also can be through in advance with the mixing of above-mentioned pigment and pigment dispersing agent, make its dispersion in the monomer of stating after the composition that obtains added to and modulate.The dispersion machine that uses when making above-mentioned pigment dispersing; Do not have special restriction, for example can enumerate towards storehouse nation make work, " topical reference book of pigment ", first published, known dispersion machines such as the kneader of record in the storehouse bookstore, 2000,438 pages, roller mill, masher, ultra grinding machine, dissolving machine, homogeneous mixer, sand mill.Can also utilize the machinery of 310 pages of records of the document to grind, it is broken to utilize friction force to carry out micro mist.

(pigment dispersing agent)

In inkjet ink of the present invention,, preferably add pigment dispersing agent in order to obtain dispersing of pigments stability.

Its use amount is with respect to the gross mass of inkjet ink, and preferably the scope with 0.1～10 quality % contains spreading agent, more preferably 0.1～9 quality %, the scope of preferred especially 0.1～8 quality %.

As this pigment dispersing agent, can use salt, HMW beta-unsaturated esters, high-molecular copolymer, modified polyurethane, modified polyacrylate, polyether ester type anionic species activating agent, naphthalene sulfonic acids formalin condensation product salt, aromatic sulphonic acid formalin condensation product, polyxyethylated phosphate, polyoxyethylene nonylplenyl ether, stearyl amine acetate, pigment derivative of the polycarboxylic salt of salt, HMW, long-chain polyamino acid amides and the polar acid ester of the carboxylate, long-chain polyamino acid amides and the HMW acid esters that contain hydroxyl etc.As the object lesson of pigment dispersing agent, the spy opens the example of putting down in writing in paragraph sequence number [0021]～[0023] of 2005-15672 communique and also can be used as preferred example use in the present invention.

(monomer)

Inkjet ink among the present invention can contain at least a kind of monomer.The monomer that uses in the above-mentioned inkjet ink does not then have special qualification, from aspects such as film minimizing, film strength, solvent resistance, more preferably polyfunctional monomer so long as can utilize heat to carry out polyreaction.In addition, from the production efficiency aspect, also preferably has the polymerization ability under the active energy beam.

As the kind of polymerizable group, do not have special restriction, can enumerate acryloyl group, methacryl, epoxy radicals etc.Wherein, reduce little viewpoint, preferred especially acryloyl group, methacryl from the ageing stability of black liquid, the ejection stability under the ink-jetting style, film.

From the viewpoint that the viscosity of black liquid does not excessively increase, the molecular weight of monomer is preferred below 3000, and is more preferably below 2000, preferred especially below 1000.

From film strength, prevent viewpoints such as reticulation, solvent resistance when giving nesa coating, the use amount of monomer is preferably more than the 20 quality % in the black liquid-solid body composition, more preferably more than the 30 quality %, further more than the preferred 40 quality %.

In addition, preferably be that 4 officials can above monomer more than the 50 quality % in this monomer total amount.If the content of monomer in the China ink liquid, the ratio of functional group's number are in the above-mentioned preferred range, the film slip of beating after dripping at black liquid that bakes in the operation can reduce.

If be that 4 officials can be below above 6 official's abilities more than the 50 quality % in the monomer total amount, viscosity can excessively not increase, and adopts ink-jetting style stably to spray, and the film slip diminishes, and is preferred from these viewpoints.

Beating the viewpoint that bakes the film slip the operation after dripping from the black liquid of further minimizing, is more than 3 official's abilities more than the 90 quality % in the preferred monomers total amount further.

As 3 officials can be above the object lesson of polymerizable monomer, can enumerate the spy open record in paragraph sequence number [0061]～[0063] of 2001-350012 communique 3 officials can the monomer that contains epoxy radicals, spy open monomer that 3 officials of record in " market expectation of reactive monomer " that 3 officials of record in the paragraph sequence number [0016] of 2002-371216 communique can above acrylate monomer, methacrylate monomers and CMC publish can be above etc.Wherein, Preferred especially trimethylolpropane triacrylate, trimethylolpropane PO (epoxypropane) modification triacrylate, trimethylolpropane EO (oxirane) modification triacrylate, tetramethylol methane tetraacrylate, trimethylolpropane tris (methacrylate), pentaerythritol triacrylate, glycerine polyglycidyl ether, two glycerine polyglycidyl ethers, trimethylolpropane polyglycidylether etc., but be not limited to these.In addition, also can above-mentioned 3 officials more than 2 kinds can also be used by above monomer.

As 4 officials can be above the object lesson of monomer, can enumerate monomer that 4 officials of record in " market expectation of reactive monomer " that 4 officials of record in the paragraph sequence number [0016] that the spy opens the 2002-371216 communique can above acrylate monomer, methacrylate monomers and CMC publish can be above etc.

In these monomers more than 4 officials ability; Preferred especially tetramethylol methane tetraacrylate, tetramethylol methane tetraacrylate, two (trimethylolpropane) tetraacrylate, epoxidation tetramethylol methane tetraacrylate, dipentaerythritol acrylate, neopentyl glycol low-polyacrylate, 1; 4-butylene glycol low-polyacrylate, 1; 6-hexanediol low-polyacrylate, trimethylolpropane low-polyacrylate, pentaerythrite low-polyacrylate, urethane acrylate, epoxy acrylate etc., but be not limited to these.Outside it, dipentaerythritol five acrylic ester, pentaerythrite four (methacrylate) also are preferred especially monomers.

As the above monomer of these preferred especially 4 officials abilities, for example can enumerate UA-32P (Xin Zhong village chemistry (strain) system), KAYARAD DPHA (Japanese chemical drug (strain) system), V#400 (Osaka organic (strain) system) etc.

In order to reduce the viscosity of the black liquid and the black liquid remnants of defeated troops, can be suitably and with monofunctional monomer or 2 functional monomers.In this case, reduce little viewpoint, more preferably 2 functional monomers from film.As these monofunctional monomers or 2 functional monomers, the monomer that contains epoxy radicals, the spy that for example can enumerate the simple function of record in the paragraph sequence number [0065] that the spy opens the 2001-350012 communique open record in the paragraph sequence number 0015～0016 of 2002-371216 communique simple function or 2 officials can acrylate monomer or methacrylate monomers and CMC " market expectation of reactive monomer " of publishing in 1～2 functional monomer etc. of record.

In addition,, or give the driving fit with substrate, can on a small quantity and use 25 ℃ viscosity to be high polar monomer, oligomer etc. such as full-bodied polyfunctional monomer more than the 700mPas or urethane acrylate for the quasi-complement film strength.As and with aspect preferred polyfunctional monomer, high polar monomer and oligomer; Do not have special restriction; General material be can use, dipentaerythritol acrylate, isocyanuric acid EO modification diacrylate, isocyanuric acid EO modification triacrylate, 6-caprolactone modification three (acryloxy ethyl) isocyanuric acid ester, urethane acrylate (for example East Asia synthetic (strain) system ア ロ ニ Network ス M-1000, M-1200, M-1210, M-1600), polyester acrylate (for example East Asia synthetic (strain) system ア ロ ニ Network ス M-6100, M-6200, M-6250, M-6500, M-7100, M-7300, M-8030, M-8060, M-8100, M-8530, M-8560, M-9050) etc. for example can be enumerated.These also use monomer addition can the viscosity that makes the black liquid remnants of defeated troops 25 ℃ down as the scope below the 4000mPas in suitably adjusting.

The viscosity that makes the black liquid remnants of defeated troops 25 ℃ down for below the above 4000mPas of 40mPas, can enumerate following method.

For example, can enumerate the more low viscous monomer of use as the monomer that will use.In addition, can enumerate the use amount that reduces HMW or high polar resin as adhesive ingredients, reduce the high viscosity composition in the black liquid.In addition, can enumerate the most suitable dispersing of pigments agent of selection, make the method for the viscosity reduction of dispersible pigment dispersion.Wherein, use low viscous monomer effective especially.Giving aspect the film strength of pixel the preferred monomer that uses with 3 above polymerizable groups.

(organic solvent)

As organic solvent, can enumerate water-miscible organic solvent and water-insoluble organic solvents such as ester or ether such as alcohol, can use any.

These solvents shared ratio in inkjet ink of the present invention, black liquid wetting expansion aspect in the pixel is more than the preferred 10 quality %, more preferably more than the 30 quality %, further more than the preferred 50 quality %.

When having used water-insoluble organic solvent, even owing to do not have high polar group also can make its dissolving in the monomer that uses, bonding agent, spreading agent etc., the aspect that the possibility that therefore raises from the excess stickiness as black liquid is little is preferred.Do not have special restriction as water-insoluble organic solvent; Low and the organic solvent that from inkjet ink, remove easily of boiling point; Therefore because evaporation rapidly on ink gun usually, cause black fluid viscosity rising on ink gun etc. easily, usually with the deterioration of ejection property.In order to prevent the drying of ink gun China and Mexico liquid, the boiling point that preferably contains at least under the normal pressure is the organic solvent more than 160 ℃.

From cutting down the viewpoint of VOC, preferably make water as solvent.

In addition, 50 quality % of the solvent that preferably contains of the inkjet ink among the present invention are above is made up of the compound that has the boiling point more than 160 ℃ under (25 ℃, 760mmHg) under the normal temperature and pressure.As the solvent that has boiling point more than 160 ℃ under this normal temperature; Can enumerate high boiling solvent that the spy opens record in paragraph sequence number [0031]～[0037] of 2000-310706 communique, aklylene glycol acetic acid esters, aklylene glycol diacetate esters etc.; Wherein, Preferred especially dipropylene glycol monomethyl ether, propylene-glycol diacetate, dipropylene glycol monomethyl ether acetic acid esters, propylene glycol n-butyl ether acetic acid esters, DPG mono-n-butyl ether, tripropylene glycol methyl ether acetate, diethylene glycol monobutyl ether, 1,3 butylene glycol diacetate esters, DPG positive propyl ether acetic acid esters, propylene carbonate, diethylene glycol monobutyl ether acetic acid esters, DPG n-butyl ether acetic acid esters etc.

In addition; With regard to the upper limit of the boiling point of solvent; As long as can use inkjet ink of the present invention to adopt ink-jetting style to make color filter; Just not special restriction, the viewpoint of the operability from the manufacturing process of the modulating process of black liquid and color filter, preferably boiling point is below 290 ℃, is the organic solvent of the lower liquid of viscosity ratio under the preferred normal temperature (20 ℃) below 280 ℃.

(polymerization initiator)

In inkjet ink of the present invention,, can and use polymerization initiator in order to promote the polyreaction of monomer.As polymerization initiator, when adopting active energy beam to carry out the polymerization of image portion, use Photoepolymerizationinitiater initiater, when adopting heat to carry out the polymerization of pixel portions, use thermal polymerization.As Photoepolymerizationinitiater initiater; For example can enumerate the spy and open the initiating agent of putting down in writing in paragraph sequence number [0079]～[0088] of 2006-28455 communique,, can enumerate 2-trichloromethyl-5-(to the styryl styryl)-1 as preferred object lesson; 3; 4-oxadiazole, 2, two (the trichloromethyl)-6-of 4-[4 '-N, amino-the 3 '-bromophenyl of N-two (ethoxy carbonyl methyl)]-s-triazine.

In addition, as thermal polymerization, can use known organic peroxide compounds or azo compound usually.Can improve the intensity of pixel portions thus.In addition, except thermal polymerization, can also use curing catalysts such as imidazoles.Organic peroxide compounds and azo compound can use a kind separately, also can be with also using more than 2 kinds.Wherein, organic peroxide is the derivant of hydrogen peroxide (H-O-O-H), is meant in the molecule to have-organic compound of O-O-key.

If classify, can enumerate ketone peroxide, ketal peroxide, hydrogen peroxide, dialkyl, peroxidating diacyl, peroxyester, peroxy dicarbonate etc. by chemical constitution.Specifically, preferred 3,3 '; 4,4 '-four (t-butyl peroxy carbonyl) benzophenone, benzoyl peroxide, 2,2-two (4; 4-di-tert-butyl peroxide cyclohexyl) propane, 1, two (the uncle's hexyl peroxides)-3,3 of 1-; 5-trimethyl-cyclohexane, t-butyl perbenzoate, benzylhydroperoxide di tert butyl carbonate, mistake m-phthalic acid di tert butyl carbonate, t-butyl peroxy-acetate, the own ester of benzylhydroperoxide uncle, t-butyl peroxy-3; 5,5-tri-methyl hexanoic acid ester, t-butyl peroxy-laurate, t-butyl peroxy isopropyl monocarbonate, t-butyl peroxy-2-ethylhexyl monocarbonate, 2, two (the toluoyl base peroxide) hexanes, 2 of 5-; 5-dimethyl-2, two (benzoyl peroxide) hexanes of 5-, uncle's hexyl peroxy isopropyl base monocarbonate,

T-butyl peroxy-isobutylate, 1,1,3; 3-tetramethyl butyl peroxide-2 ethyl hexanoic acid ester, uncle's hexyl peroxy isopropyl base monocarbonate, 2,5-dimethyl-2, two (the 2-ethyl hexanoyl base peroxide) hexanes of 5-, t-butyl peroxy-2 ethyl hexanoic acid ester, the tert-butyl group are crossed maleic acid, cyclohexanone peroxide, methyl-acetoacetic ester superoxide, methyl hexanone superoxide, diacetone peroxide, 1; Two (the uncle's hexyl peroxide) cyclohexanes, 1 of 1-, two (t-butyl peroxy)-3,3 of 1-; 5-trimethyl-cyclohexane, 1, two (the t-butyl peroxy)-2-methylcyclohexanes, 1 of 1-, two (t-butyl peroxy) cyclohexanes, 2 of 1-; Two (t-butyl peroxy) butane, 2 of 2-, two (4, the 4-di-t-butyl peroxide cyclohexyl) propane of 2-, di-isopropylbenzene hydroperoxide, hydrogen peroxide 1; 1; 3,3-tetramethyl butyl, hydrogen peroxide cumene, t-butyl hydroperoxide etc., preferred 2; Peroxyester compounds such as peroxidating diacyl compounds, t-butyl perbenzoate such as ketal peroxide compounds, benzoyl peroxide such as two (4, the 4-di-t-butyl peroxide cyclohexyl) propane of 2-.

In addition, as above-mentioned azo compound, for example can enumerate the spy and open the compound of putting down in writing in paragraph sequence number [0021]～[0023] of flat 5-5014 communique.In these compounds, preferred decomposition temperature is high to a certain extent, and is stable at normal temperatures, produces the compound that free radical becomes polymerization initiator thereby decompose during heating.In organic peroxide compounds or azo compound (thermal polymerization); If use half life temperature (more preferred more than 50 ℃ than higher; More preferably more than 80 ℃) material; The viscosity of composition not can through the time change, can suitably constitute, for example can enumerate azo two (cyclohexanes-1-itrile group) etc.

As the content of Photoepolymerizationinitiater initiater and/or thermal polymerization,, promote property, viscosity stability, painted viewpoint, preferred 0.5～20 quality %, more preferably 1～15 quality % from reaction with respect to the amount of monomer.

In addition, from the viewpoint that the film slip diminishes, with respect to all solids composition of black liquid, the content of this initiating agent is preferably below the 5.0 quality %.The content of initiating agent is few more preferred more, is limited to 0 quality % down.

In addition, surprisingly, distinguish that amount of initiator is few more, can remain on high level with voltage retention more.Specifically, if amount of initiator is that voltage retention is good below the 5.0 quality % in all solids composition of black liquid, therefore preferred.

More surprisingly, distinguish that amount of initiator is few more, the flatness of the film when making color filter (flatness of pixel) is good more.Specifically, if amount of initiator is that it is smooth that pixel becomes below the 5.0 quality % in all solids composition of black liquid, therefore preferred.

These initiating agents can use a kind or combination more than 2 kinds used.

In addition, beyond mentioned component, in the scope of not damaging effect of the present invention, can be also with bonding agent, surfactant, other adjuvants etc.

As and the example of the bonding agent of usefulness, can enumerate bonding agent that adhesive resin, spy that the spy opens record in paragraph sequence number [0015]～[0030] of 2000-310706 communique open record in paragraph sequence number [0041]～[0050] of 2001-350012 communique etc.

As the example of surfactant, can enumerate paragraph sequence number [0021], spy that the spy opens flat 7-216276 communique and open 2003-337424 communique, spy and open in the flat 11-133600 communique disclosed surfactant as preferred example.The content of surfactant is below the 5 quality % with respect to the inkjet ink total amount preferably.

As other adjuvants, can enumerate the spy and open other adjuvants of putting down in writing in paragraph sequence number [0058]～[0071] of 2000-310706 communique.

< color filter and manufacturing approach thereof >

The manufacturing approach of color filter of the present invention; It is characterized in that: comprise that black liquid that the recess that adopts ink-jetting style that the next door that on substrate, is formed is surrounded gives the drop of inkjet ink for color filter gives operation and the above-mentioned black liquid drop that has given carried out the operation that bakes of heat treated; Above-mentioned black liquid gives operation and the above-mentioned time interval that bakes operation is more than 1 minute.

The manufacturing approach of color filter of the present invention has: thus adopt ink-jet method to the recess that surrounds by the next door give black liquid that inkjet ink for color filter that oneself states forms dyed layer give operation (below be sometimes referred to as " dyed layer forms operation ") and formed required form and aspect dyed layer at least 1 look or all the back heating be cured bake operation (below be sometimes referred to as " heating process "), preferably also have the curing process of the dyed layer curing of adopting at least 1 look that the active energy beam irradiation will form.Moreover the next door is pre-formed on substrate before dyed layer forms operation, will narrate below the details for the formation method in next door.

(next door)

In the present invention, the recess that adopts ink-jetting style that the next door that on substrate, is formed is surrounded is given the drop of inkjet ink for color filter, forms dyed layer.This next door is not had any qualification, when color filter manufacturing, preferably have black matrix" (BM) function, have the next door of light-proofness.This next door can be adopted with known color filter and made with the same material of black matrix", method.For example can enumerate the black matrix" that the spy opens record in paragraph sequence number [0021]～[0074] of 2005-3861 communique, paragraph sequence number [0012]～[0021] that the spy opens the 2004-240039 communique, the ink-jet that the spy opens record in paragraph sequence number [0015]～[0020] of 2006-17980 communique, paragraph sequence number [0009]～[0044] that the spy opens the 2006-10875 communique is with black matrix" etc.

In above-mentioned known method for making,, preferably use photosensitive resin transfer material from the viewpoint of cutting down cost.Photosensitive resin transfer material is the material that on interim supporter, is provided with the resin bed with light-proofness at least, with the substrate crimping, can this resin bed with light-proofness be transferred on this substrate.

Photosensitive resin transfer material preferred uses the special photosensitive resin transfer material of putting down in writing in the flat 5-72724 communique of opening, and promptly uses the film of the type that becomes one and forms.Example as this one-piece type film formation; Can enumerate with interim supporter/thermoplastic resin/middle layer/photo-sensitive resin (in the present invention with following order; So-called " photo-sensitive resin "; Be meant the resin that can solidify, be also referred to as " resin bed " when it has light-proofness, be also referred to as " pigmentary resin layer " when being colored as the purpose color with light-proofness through rayed)/formation that protective film is closed.

Method for making about the interim supporter that constitutes photosensitive resin transfer material, thermoplastic resin, middle layer, diaphragm, transfer materials; As preferred example, can enumerate the spy and open the example of putting down in writing in paragraph sequence number [0023]～[0066] of 2005-3861 communique.

In addition, in order to prevent the colour mixture of inkjet ink, above-mentioned next door can be implemented ink-resistant liquid and handled.Handle for this ink-resistant liquid; (for example for example can enumerate (1) with the mixing method to the next door of ink-resistant fluidity material; Open the 2005-36160 communique with reference to the spy), (2) reset the ink-resistant liquid layer method (for example; Open flat 5-241011 communique with reference to the spy), (3) using plasma is handled and the method for giving the ink-resistant fluidity (for example; Open the 2002-62420 communique with reference to the spy), the method (for example, opening flat 10-123500 communique) etc. of coating ink-resistant alburnum material above the wall of (4) next door with reference to the spy, the method for the ink-resistant liquefaction processing of plasma is implemented to utilize in preferred (3) to the next door that forms on the substrate especially.

-dyed layer formation operation-

It is to adopt the recess of ink-jet method between next door (heavy colour separates walls) to give the drop of inkjet ink of the present invention that dyed layer forms operation, thereby forms dyed layer.This dyed layer becomes the redness (R) that constitutes color filter, green (G), blue colored pixels such as (B).

The formation of dyed layer can be invaded the inkjet ink that is used to form colored pixels (the for example pattern of pixels of RGB3 look) in the recess that the next door on substrate, formed as stated surrounds, and is constituted and is formed by the multiple pixel more than 2 looks.

For the shape of color filter pattern, do not have special qualification, as the black matrix" shape, can be general strip, also can be clathrate, can also be δ arranges shape.

As ink-jet method, can adopt and spray charged inkjet ink and the method for controlling with electric field continuously, use piezoelectric element method, the heated ink liquid of ejecting ink liquid and the whole bag of tricks such as method that utilize its foaming to spray off and on off and on.Below ink-jet method is detailed.

(physics value of black liquid)

As the physics value of black liquid, preferred 25 ℃ viscosity is 20～100mPas, when spraying with device, preferably black liquid temp is remained on the temperature of constant 20～90 ℃ scope, and the viscosity of this moment is preferably 2～20mPas.In addition, the preferred 10～50mN/m of 25 ℃ surface tension when spraying with device, preferably remains on the temperature of constant with black liquid temp 20～90 ℃ scope, and the surface tension of this moment is preferably 20～30mN/m.Constant in order black liquid temp to be remained with specified accuracy, preferably have black liquid temp pick-up unit, black liquid heating or cooling device and control heating or Cooling Control device according to detected black liquid temp.In addition, perhaps have through also being preferred to the device that the external energy of the device of the black liquid of ejection alleviates the influence that changes for black liquid rerum natura according to the control of black liquid temp.

In addition, in order suitably to keep the shape of black liquid moistening expansion after bullet falls within substrate, the black liquid rerum natura that preferably bullet is fallen behind the substrate remains the regulation rerum natura,, preferably remains in the set point of temperature scope near substrate or its for this reason.Perhaps the thermal capacity of the platform through increasing supporting substrate etc. also is effective thereby alleviate influence of temperature variation.

(system's formation)

One be illustrated in Fig. 1 with what the system that uses above-mentioned black liquid to make color filter constituted.

100 is head, and its details is shown in Fig. 2.Head 100 has 3 ink guns 101,102,103, and the black liquid with 3 looks is ejected on the substrate respectively.The ejection of head 100 is by control part 200 controls, and the black liquid bullet of ejection falls within on the substrate 300, forms each pixel of RGB.Wherein, substrate was put on substrate platform 400 in 300 years, and substrate platform 400 possesses the not shown motor that is used to make substrate 300 and substrate platform 400 to move along mutually orthogonal XY2 direction with respect to head.The action of motor forms pixel by control part 200 controls with black liquid ejection synchronously.Head maintenance station 500 has the mechanism of the discharge performance that is used for keeping well head 100.

(head)

Each free not shown black liquid supply unit of 3 statures shown in Figure 2 is supplied with the black liquid of R, G, this 3 look of B respectively.In addition; 110 is microphotographic camera; To the BM pattern (partition pattern) on the substrate or be used for confirming that the special-purpose pattern of position or the state that black liquid bullet falls make a video recording, through the image of taking is handled, the action of control basal plate platform 400 is so that black liquid bullet falls within the desired position.

3 ink guns 101,102,103 can be the heads of same structure, also can be the heads of different structure.As the structure of head, as for example spy open in the flat 5-193140 communique disclosed, have black liquid sprayed the part of energy and the nozzle segment of the black liquid of ejection.

(type of drive)

As the mode that black liquid is sprayed energy; Can as the spy open flat 7-81090 communique disclosed; Be the method that is called so-called continuation mode, promptly spray black drop continuously, according to whether making its bullet fall to making a deflection; Selecting the method controlled, also can be the mode that only sprays black drop in the part of needs that is called so-called mode as required.Mode as required; Can as the spy open in the flat 5-16349 communique disclosed; Be to use piezoelectric element etc. to produce black hydraulic pressure according to the distortion of structure; Make the mode of its ejection, also can as the spy open in the flat 1-234255 communique disclosed, the pressure that expansion produced that utilizes the gasification that produces with heat energy to accompany makes the mode of its ejection.In addition, can as the spy open the 2001-277466 communique disclosed, be to utilize the mode of electric field controls to the ejection of medium.

(high speed)

Moreover; This moment is in order to spray the black liquid of multiple color; Through open described in the flat 6-71904 communique like the spy, a plurality of ink guns 101,102,103 are constituted integratedly, can form coloured image small-sized, at high speed; And then through disposing a plurality of head units, more high speed with a plurality of nozzle rows.

And then through open like the spy clear 63-160849 communique said, nozzle of all kinds to be configured with the width of image width identical or more than it, is formed so-called wire type end, can form image more small-sized, at high speed.

(nozzle)

As the material of nozzle, can be metals such as nickel, stainless steel, also can be for example silicon, resin.Through the surface of nozzle being implemented as the spy opens and puts down the disclosed surface treatment of 5-116327 communique, the formation of the black drop that can stably keep spraying, and then prevent that the spittle of black drop is attached to nozzle surface.As processing, can be the easily wetting processing that becomes of black liquid, also can be black liquid becomes and is difficult to wetting processing.When implementing the wetting easily processing of black liquid, because nozzle surface be covered by black liquid, therefore there is the black liquid rerum natura homogenising that makes the nozzle segment periphery,, high speed successfully supplies with advantages such as black liquid when spraying.On the other hand, become when being difficult to wetting processing implementing black liquid, because black liquid adheres to minimizing on nozzle plate, the black liquid that adheres to that can alleviate on the nozzle plate becomes problems such as ejection obstacle.

(moving control)

About relatively moving of head and substrate, as stated, can be that head is 100 static, substrate platform 400 moves, also can be the substrate platform is 400 static, head moves.Head relatively moves with substrate; Can be that substrate is moved along the directions X with nozzle rows quadrature shown in Figure 1, after the ejection of terminal, make substrate move set amount along the Y direction from top; On directions X, spray in opposite direction to the top side again from above-mentioned terminal; Also can from top after the ejection of terminal, after making substrate move to top from the terminal under the situation that does not from the beginning spray black liquid, likewise move from top to terminal edge ejection limit with above-mentioned along directions X.The ejection condition when the terminal sprays wherein from top; The for example distribution of the interior ejection ink amount of head and timing, the pixel of the relative position relation of substrate and ejection etc.; Can be with the ejection condition when top sprays in opposite direction be identical from the terminal; When bullet in the opposite direction falls state not simultaneously,, can set so that the ejection condition is different in order to reduce this situation.

In addition, can a plate base 300 be divided into a plurality of zones, carry out above-mentioned mobile control limit in each regional edge and make its ejection, also can make a slice substrate is that a zone makes its ejection.

(substrate replacing)

After the ejection of a plate base 300 finishes, utilize not shown mechanism that the substrate that black liquid bullet falls is discharged from substrate platform 400, again black liquid there is not substrate-placing that bullet falls to substrate platform 400, carry out repeatedly and above-mentioned same control.

Wherein, in the discharge of substrate, carry put during, can not spray black liquid from the head, if ejection is not stopped, can prevent that the drying of the black liquid of the nozzle surface of head is carried out therebetween, the viscosity of the black liquid of nozzle segment rises.Thus; Beginning when new substrate sprays, because the ink amount at ejection initial stage reduces, perhaps spouting velocity reduces; Can prevent to prolong until the retardation time of black liquid ejection after the drive head head therebetween and the bullet of the displacement of substrate, the black drop position deviation that falls.In addition, the behavior of the meniscus the when back of stopping sprays changes with rerum natura, owing to excessively retreat into nozzle interior, therefore can prevent air is attracted inside to the end from the nozzle outside, and it becomes the obstacle of later ejection.

(renewal)

Specifically; In stopping; As the spy open in the flat 11-157102 communique disclosed, carry out pixel is formed the ejection of the black liquid that does not have help in the time of beyond head is positioned at the pixel portion on the substrate, fresh black liquid supply nozzle is surperficial; Prevent the evils that viscosity variation etc. produces, can stably keep meniscus.This ejection can be carried out on substrate, also can adopt not shown mechanism that head 100 is moved on the head maintenance station 500 shown in Figure 1, in the head maintenance station, makes its ejection.Wherein, with regard to the ink amount of ejection, from reducing the waste aspect of black liquid, preferably make black liquid rerum natura be returned to the equal scope of A-stage in for a small amount of.

Method as the black liquid of ejection also can drive the ejection energy applicator that is used to form pixel, makes its ejection, thereby also can make its ejection through giving pressure from the interior headward black liquid of black liquid supply side.

(adding a cover)

In stopping, so as the spy open in the flat 11-138830 communique disclosed, make nozzle surface become roughly sealing state with lid, the vapor pressure of the low boiling point component through making black liquid reduces and is alleviated, and makes dry delay, thereby can alleviate above-mentioned evils.Perhaps in head maintenance station 500,, can alleviate the dry rerum natura that produces and change through nozzle surface being impregnated in not shown black liquid storage part.

Also usefulness is more effective with roughly sealing or be dipped in the medium method of black liquid with these black liquid ejections.

(wiping)

As stated; Through nozzle surface implement is handled, can alleviate black liquid in the adhering to of nozzle surface, if but carry out for a long time continuously vomiting in ejection or short time; Adhere to black liquid sometimes; Therefore in head maintenance station 500, as the spy open in the flat 6-71904 communique disclosed, preferably adopt scraper to carry out suitable wiping.

(not spraying detection)

In addition, in head maintenance station 500, adopt for example special opening to put down disclosed device detects whether carry out suitable ejection from each nozzle in the 2000-343686 communique, it is effective taking when having the nozzle that does not spray to dispose.

As disposal for the nozzle that does not spray; Except adopting the cleaning that above-mentioned scraper carries out; As the spy open flat 6-71904 communique disclosed, attract black liquid from the nozzle plate outside, it is effective that near the black liquid the meniscus that black liquid rerum natura is changed is discharged with the bubble in the head.

As the reason that produces bubble in the head, except as stated since the formation of meniscus does not attract outside the situation of gas entirely, owing to a pressure variation of interior black liquid, the gas that contains in the black sometimes liquid, particularly air is grown into bubble.As the method that prevents its generation, make and for example contain the spy in the black liquid and open that disclosed defoamer is effective in the flat 8-34943 communique.

In addition, as the spy open in 2000-251689 communique and the Te Kai 2002-45608 communique disclosed, it also is effective that black liquid has been carried out supplying with after deaeration is handled.As defoaming method, preferably give hyperacoustic method disclosed in the flat 9-286943 communique or carry out the method for vacuum defoamation and the method for they and usefulness like special opening.In addition, as the spy show in the flat 8-506540 communique disclosed, the gas that is provided with near the black flow road head being dissolved in the black liquid attracts the device of deaeration more effective.

(black liquid maintenance method)

As the method that keeps black liquid; Preferably with the state of atmosphere under black liquid surface is maintained the method for the height of regulation with respect to nozzle surface; Be filled into the method in the known print cartridge; Also can as the spy open in the flat 5-16377 communique disclosed, be contained in the container that can be out of shape, form jar.In addition, open disclosed secondary jar in the flat 5-16382 communique through possessing the spy, the supply headward of black liquid is more stable.In addition, as the spy open in the flat 8-174860 communique disclosed, when the pressure of black liquid supply chamber reduces, also can use the print cartridge that utilizes moving of valve to supply with the mode of black liquid.

(black liquid supply road)

As the method that black liquid is supplied with from these black liquid holding devices headward, can be directly with the method for holding device with the head unit binding, also can be the method for utilizing stream such as conduit to link.These black liquid holding devices and stream preferably have the material of good wettability for black liquid, perhaps implemented surface treatment.When wetting state is not good, produce not by the part of black liquid wetting in the conduit, the supply headward of black liquid slows down, and perhaps bubble becomes and is attached to pipe inner wall easily.

(filtrator)

In the keeping of black liquid, because the look material that disperses in black liquid cohesion grows up, perhaps dust such as sneaks at reason, and is inner at head if there is big solids in the black liquid, particularly near nozzle, hinders to spray.In order to prevent that it from producing, the filtrator that captures solids preferably is set in by black liquid retaining part stream to the end, as the aperture of filtrator, be preferably 0.1～20 μ m.

(negative pressure)

Wherein, the meniscus shape that produces for the surface tension of suitably keeping nozzle China and Mexico liquid, must be-1～-pressure of black liquid is maintained negative pressure in the scope of 3000Pa.

As the method for giving black liquid negative pressure with these black liquid holding devices; Can use the method that the height of black liquid holding device is managed; Be the method for utilized head pressure reduction, and the method for utilizing the capillary force that is arranged on the filtrator in the black flow road, and the method for utilizing controlled pressures such as pump; And open in the clear 50-74341 communique like the spy and black liquid to be remained in the black liquid absorber disclosed, utilize its capillary force to give method of negative pressure etc.

(ejection condition)

100 spray high frequency of black liquid from the head, can spray a large amount of black liquid in the unit interval more, can improve the production efficiency of color filter.Wherein, in order stably to spray black liquid, need the supply of black liquid stable with high frequency, the dimensionally stable of meniscus, stable from ejection shape, the spray volume of the black drop of nozzle.

In order to make the supply stabilization of black liquid, make the supply road good as stated for the wetting state of black liquid, it is effective reducing the stream impedance of supplying with the road simultaneously.In addition, stablize, need make drive condition optimization under driving frequency of head for ejection shape, the spray volume of the shape that makes meniscus, black drop.

In order to confirm best drive condition, carry out according to following steps.

Below describe with the example of the mode as required that adopts piezoelectricity, even but hot type of drive, electrostatic means also can make to use the same method.

The stability of the shape of meniscus and ejection shape through the shape of dripping that observation is circled in the air, confirms to obtain stable shaped drive condition.Fig. 3 representes the simplest voltage waveform of drive pressure electric device.Vp is a piezoelectric voltage, and tp is the driving time width, and tf, tr are respectively rising, the fall time of drive waveforms, can control these 4 respectively, also can control these 2 of Vp and tp or tr+tp simply.The shape of the drop that observation is circled in the air when changing these parameters is estimated stability.Wherein show simple trapezoidal drive waveforms, but also can as for example spy open among flat 10-235859 and the Te Kai 2003-341048 disclosed, change through further making waveform shape, control spray volume etc. more well.

The shape of the drop that circles in the air can be observed with formation shown in Figure 4.Timing control part 600 produces the Piezoelectric Driving waveform according to the ejection frequency f 604 of input with piezoelectric voltage Vp602, Piezoelectric Driving time width tp603, through piezoelectricity Waveform generating circuit 610 driving heads 640.

Spray black drop by head, the part that black liquid circles in the air is thrown light on LED 650.The wherein timing of the bright lamp of LED after the piezoelectricity waveform generation, is confirmed by the retardation 621 that is input in the variable delay circuit 620.By the Piezoelectric Driving waveform according to the retardation delay stipulated time after, LED 650 is by the bright circuit for lamp 630 bright lamps of LED.Black droplet profile from the circling in the air of nozzle ejection is taken with the CCD camera that microscope lens 660 is installed 661, can observe through monitor 670.Even can watch monitor 670 limits to confirm that Vp, tp are so that a shape that is observed is also stable under high frequency in the limit like this.Wherein so-called as dripping a dimensionally stable, be meant that image when on monitor 670, taking many does not successively wave and stablize, generation is not called as the state of the small spittle of the black liquid of satellite (satellite).In addition, after the ejection, get over subglobular through the shape after the time that arrives substrate, the bullet on substrate falls, and shape is more approaching justifies, and can control the distribution of the ink amount in the pixel well.

Secondly stable in order to confirm spray volume, the method below adopting is measured spray volume.With the formation of Fig. 4 from the beginning 640 regulation nozzle spray black liquid with the stipulated time, catch the black liquid of ejection, quality measurement.Through using it, can obtain the ink amount that once sprays from a nozzle divided by ejection time * frequency * nozzle number.Judge that the ejection ink amount obtain like this is whether in specialized range.

Wherein, when be have a plurality of nozzles the time, and the spray volume of each nozzle is even for the spray volume that makes each nozzle when inhomogeneous, preferably controls the energy of above-mentioned ejection energy driving device respectively.

(head substrate gap)

Even the dimensionally stable of black liquid of 100 ejections from the head, spray volume is stable, if the precision of position is not high but the bullet on the substrate falls, also can't form good pixel.In order to keep the bullet positional precision that falls well, importantly do not produce above-mentioned small dispersing and drip, and also stable from the emission direction of nozzle.For the emission direction precision from nozzle, the black liquid physical stability of the operating accuracy of nozzle form and meniscus part is qualitative, the pollution of nozzle face etc. has mastery.In order stably to keep the black liquid rerum natura of meniscus, when ejection is stopped, the black liquid of high viscosityization being removed and is replaced into fresh black liquid as stated is effectively, and is effective in order to make nozzle face totally adopt scraper to clean.

In addition, when the error of black liquid emission direction is ormal weight, reduce, can improve bullet on the substrate positional precision that falls through making the interval between head 100 and the substrate 300.

The head and the interval of substrate are reduced so that the flatness of the nozzle face of head, substrate 300 and year to put its rectilinearity of flatness and not shown substrate table transferring mechanism of substrate platform 400 good.Usually from their mechanical precision, the interval of nozzle face and substrate surface is preferably 200～2000 μ m.

Wherein when substrate concavo-convex level and smooth; The device at the interval through having detection such as laser length meter not shown in the head 100 and substrate drives not shown height of head control device, can remain on ormal weight according to the concavo-convex interval with substrate and head in the moving of substrate; Through the control height; Can further reduce, when the speed of following of pick-up unit at interval and height controller is enough fast, it is reached below the 100 μ m.

(nozzle diameter-at interval, primitive shape)

Fall diameter preferably between 10～500 μ m at the bullet of the black liquid on the substrate 300, bullet size and black liquid the wetting state decision on substrate of diameter by black drop that fall.The contact angle of China ink drop on substrate is preferably 0～80 degree, and the diameter of the black drop that circles in the air is preferably 5～250 μ m, and the nozzle diameter of this moment is preferably 15～100 μ m.Wherein, The contact angle of China ink drop on substrate can use consonance interface science system DropMaster700; In the enforcement that does not form BM the about 2 μ l of the black liquid that drips on the glass surface of plasma treatment, the shape image that drips after adopting θ/2 methods to 500msec is handled, and measures.

When the interval of cycle of the pixel of nozzle rows direction and nozzle exists integral multiple to concern; Through making the nozzle rows direction and the substrate moving direction quadrature of above-mentioned head, can form pixel, when each interval is not that integral multiple is when concerning; As the spy open flat 9-300664 communique disclosed; Through becoming the direction setting of nozzle rows with respect to the substrate moving direction is the angles beyond 90 degree, changes that the nozzle rows on apparent can make its bullet fall within pixel at interval on the substrate moving direction.At this moment, the ejection that must carry out on the angle from the ejection control of each nozzle is regularly revised.In addition, also can as the spy open in the 2000-89020 communique disclosed, use different nozzles to beat and drip, thereby the deviation of the spray volume between nozzle is reduced.

(ink amount)

The shape of the pixel that is formed by the next door on the substrate and indefinite if the length direction of pixel is the directions X to the substrate high-velocity scanning, can make the ejection of black liquid continuous in the longitudinal direction, and be therefore preferred.

The amount that should bullet falls within the black liquid on the substrate is by colorant concentration contained in the black liquid with in the necessary painted dosage decision of guaranteeing on the performance of color filter.Usually, the colorant concentration in the black liquid-solid body composition (above-mentioned black liquid the remnants of defeated troops) is about 20～70 quality %, and look material amount required on the color filter is 0.5～5.0g/m ²About, the amount that falls of the black liquid bullet in the pixel is preferably 1～30g/m ²

The fall change of amount of the bullet of each pixel is little, and it is even then to be difficult for producing density unevenness, if the fall change of amount of bullet is little in the pixel, can prevent that the fall penetrating concentration of the few part of amount of bullet from reducing, and hinders the reduction of color filter performance.Therefore in addition,, be difficult to cause the obstacle in the subsequent handling, black liquid bullet fallen, its unevenness of carrying out the height in the pixel after the heat treated is preferably below 50% if ink amount is even in the pixel.

(bullet fall position)

In order to make bullet in the pixel amount homogenising that falls, the preferred wetting equably end that expands to pixel, and being evenly distributed of the ink amount after the wetting expansion.Therefore, preferably in pixel, make a plurality of droplets equably bullet fall, the size of attainable droplet is about 1.5ng/ drips, need be at a high speed a plurality of bullets being fallen, about the preferred 20KHz of attainable ejection frequency.For make a plurality of equably bullet fall within the pixel, if particularly the bullet of the pixel peripheral part positional precision that falls is good, then be difficult for producing with inferior obstacle: black liquid bullet is fallen on the next door, perhaps flows in its pixel adjacent.Therefore, be effective through making distance between nozzle and substrate reduce to improve the bullet positional precision that falls as stated.

In addition; When the moving substrate limit makes its bullet fall successively on the limit; As shown in Figure 5, in advance the black liquid that falls of bullet and back bullet fall black drop unification the time, the power that the surface area of the black liquid after the unification is reduced because of surface tension plays a role; Produce the back beat the black drop that drips than the position that should bullet falls more near the put pen to paper phenomenon of liquid side of bullet in advance, consider that preferably this phenomenon comes suitably the setting bullet position that falls.

On the other hand, when the wetting state of the black liquid on substrate was good, the contact angle of Jimo liquid and substrate hour can be concentrated required ink amount to carry out bullet near the central authorities of pixel and fall.

In the present invention, after the ejection of black liquid to after time that bakes processing of stating be more than 1 minute.More preferably more than 1.5 minutes, most preferably more than 2 minutes.

China ink liquid ejection back is until time that bakes processing during in this scope, and the flatness in the pixel becomes good.In addition, when making a plurality of pixel, make black liquid be ejected into last pixel on the preferred especially time after (all beat drip finish after) be more than 1 minute until the time that bakes processing, more preferably more than 1.5 minutes, most preferably be more than 2 minutes.

The preferred following form of color filter of the present invention: spray the black liquid of at least 3 looks such as RGB, constitute by the dyed layer of at least 3 looks.

In the present invention, beat drip after, the solvent that contains in the drop is removed and after forming the black liquid remnants of defeated troops, through heating the above-mentioned black liquid remnants of defeated troops the black liquid remnants of defeated troops are solidified, thereby form dyed layer (what is called bakes processing).This heating process can be carried out with 1 stage, also can carry out with the multistage.

The so-called heating of adopting for 1 stage; After being meant that solvent is removed; From beginning at first to use the temperature of the completely crued regulation of black liquid is heated, the multistage heating of so-called employing is meant to begin heating at first at a lower temperature; Improve heating-up temperature successively, finally make under the temperature of the completely crued regulation of black liquid and heat.As heating means, can enumerate the heating of adopting hot plate, electric furnace, exsiccator etc., perhaps adopt the ultrared heating of irradiation, but be not limited to these.

Can carry out making the operation of black liquid-solidization of the black liquid remnants of defeated troops before this heating process with active energy beam.

Heating-up temperature in the heating process and heat time heating time are made up of or the decision of the thickness of dyed layer inkjet ink; Usually from guaranteeing the viewpoint of sufficient pixel intensity, solvent resistance, alkali resistance etc., preferably heated about 10 minutes～about 120 minutes down at about 120 ℃～about 250 ℃.

In the manufacturing approach of color filter of the present invention, preferably formed operation to heating process with interior carrying out from above-mentioned dyed layer at 24 hours, more preferably carried out with interior at 12 hours, further preferably carried out with interior at 6 hours.After having formed dyed layer, if place until final curing process (heating process) for a long time, produce the separating out of cohesion or various bonding agents etc. of the pigment in the black liquid sometimes, the planar of pixel can variation, and be therefore not preferred.

Forming painted areas (colored pixels) and next door as stated, after making obtains color filter,, can form coating whole with covering painted areas and next door in order to improve patience.

Painted zone and next doors such as last coating protection R, G, B make to have an even surface simultaneously.But, from process number increase aspect, preferably be not provided with.

Last coating can use resin (OC agent) to constitute, and as resin (OC agent), can enumerate acrylic resin composition, composition epoxy resin, polyimide resin composition etc.Wherein, excellent from the transparency in the visible region, color filter uses the resinous principle of Photocurable composition to be major component with acrylic resin usually, and the adaptation excellence is set out, preferred acrylic resin composition.As the example of last coating, can enumerate the spy and open the last coating of putting down in writing in paragraph sequence number [0018]～[0028] of 2003-287618 communique, as the commercially available article of last paint, can enumerate the OPTOMER SS6699G of JSR society system.

Color filter of the present invention adopts the manufacturing approach of the color filter of having stated of the present invention to make; Its purposes does not have special qualification, is suitable for for example purposes such as portable terminal devices such as TV, personal computer, liquid crystal projection apparatus, game machine, mobile phone, digital camera, auto navigation.In color filter of the present invention, at least 1 the manufacturing approach formation that can adopt color filter of the present invention of red (R), green (G), blue (B), white (W), purple colored pixels such as (V).

< display device >

As display device of the present invention, as long as possess the color filter of having stated of the present invention, just there is not special restriction, be meant display device such as liquid crystal indicator, plasma display display device, EL display device, CRT display device etc.For the definition of display device or the explanation of each display device, for example be recorded in " electronic console device (the wooden clear husband's work of assistant assistant, (strain) census of manufacturing can be issued nineteen ninety) ", " display devices (she blows along chapter work, industry books (strain) and puts down into distribution in the first year) " etc.

In display device of the present invention, preferred especially liquid crystal indicator.For liquid crystal indicator, for example be recorded in " LCD Technology of future generation (Uchida Tatsuo compiles, (strain) census of manufacturing can 1994 distribution) ".Do not have special restriction for using liquid crystal indicator of the present invention, can be applied in the liquid crystal indicator of the variety of way of record in for example above-mentioned " LCD Technology of future generation ".Wherein the present invention is effective especially for the liquid crystal indicator of colored TFT mode.For the liquid crystal indicator of colored TFT mode, for example be recorded in " colored TFT LCD (upright publication (strain) distribution in 1996 altogether) ".In addition, the present invention also can be applicable to the liquid crystal indicator that visual angles such as pixel partitioning scheme such as transverse electric field type of drive, MVA such as IPS enlarge certainly.For these modes, for example be recorded in " the up-to-date trend in EL, PDP, LCD display-technology and market-(department's calendar year 2001 distribution is investigated in eastern beautiful research centre) " the 43rd page.

Liquid crystal indicator is made up of various parts such as electrode base board, light polarizing film, phase retardation film, backlight, pad, compensation film for angular field of view except color filter.For these parts, for example be recorded in " 1994 LCDs periphery material-chemicals market (island Itou Kentaro (strain) CMC distribution in 1994) ", " present situation in the related market of 2003 liquid crystal and prospect in future (last volume) (good lucky (strain) Chimera of Fuji of table always grinds distribution in 2003) ".

Display device of the present invention can adopt ECB (Electrically ControlledBirefringence), TN (Twisted Nematic), IPS (In-Plane Switching), FLC (Ferroelectric Liquid Crystal), OCB (Optically Compensatory Bend), STN (Supper Twisted Nematic), VA (Vertically Aligned), HAN (Hybrid AlignedNematic), the so various display modes of GH (Guest Host).To use aforesaid color filter to be characteristic; It is inhomogeneous when carrying TV, monitor, not have demonstration thus; Can have wide color reproduction scope and high contrast ratio, also be suitable for notebook computer with the display device of big picture such as display or television monitor etc.

Embodiment

Below enumerate embodiment to the present invention's explanation more particularly.Material shown in following examples, reagent, ratio, equipment, operation etc. only otherwise depart from the scope of the present invention, can suitably be changed.Therefore, scope of the present invention is not limited to the concrete example shown in following.Should explain, in following embodiment, not specify as long as have, " % " and " part " expression " quality % " and " mass parts ", molecular weight is represented the matter average molecular weight.

[embodiment 1]

[next door forms the modulation of the heavy colour composition of usefulness]

Heavy colour composition K1 is described below and makes: the K pigment dispersing thing 1, the propylene glycol methyl ether acetate that at first take by weighing the said amount of table 1; Under 24 ℃ of temperature (± 2 ℃), mix; Stirred 10 minutes with 150rpm; Take by weighing methyl ethyl ketone, cyclohexanone, bonding agent 1, phenothiazine, the DPHA liquid, 2 of the said amount of table 1 while stirring, two (the trichloromethyl)-6-of 4-[4 '-N, amino-the 3 '-bromophenyl of N-two (ethoxy carbonyl methyl)]-s-triazine, surfactant 1; Under 25 ℃ of temperature (± 2 ℃), add successively, under 40 ℃ of temperature (± 2 ℃), stirred 30 minutes and obtain with 150rpm.Moreover the amount shown in the table 1 is a mass parts, is specially following composition.

< K pigment dispersing thing 1 >

Carbon black (the system Nipex35 of DEGUSSA society) 13.1%

Spreading agent (following compound 1) 0.65%

Polymkeric substance (random copolymers of benzyl methacrylate/methacrylic acid=72/28 mol ratio, molecular weight 3.7 ten thousand) 6.72%

Propylene glycol methyl ether acetate 79.53%

<bonding agent 1 >

Polymkeric substance (random copolymers of benzyl methacrylate/methacrylic acid=78/22 mol ratio, molecular weight 3.8 ten thousand) 27%

Propylene glycol methyl ether acetate 73%

< DPHA liquid >

Dipentaerythritol acrylate (contains the polymerization inhibitor MEHQ of 500ppm, Japanese chemical drug (strain) system, trade name: KAYARAD DPHA) 76%

Propylene glycol methyl ether acetate 24%

< surfactant 1 >

Following works 130%

Methyl ethyl ketone 70%

Works 1

(n＝6，X＝55，y＝5，

Mw＝33940，Mw/Mn＝2.55

PO: epoxypropane, EO: oxirane)

Table 1

The heavy colour composition	K1
		K pigment dispersing thing 1 (carbon black)	30
Propylene glycol methyl ether acetate	7.3
		Methyl ethyl ketone	34
Cyclohexanone	8.6
		Bonding agent 1	14
DPHA liquid	5.8
		2, two (the trichloromethyl)-6-of 4-[4 '-N, amino-the 3 '-bromophenyl of N-two (ethoxy carbonyl methyl)]-s-triazine	0.22
Phenothiazine	0.006
		Surfactant 1	0.058

(mass parts)

(formation in next door)

, use washing agent to scrub and wash after the alkali-free glass substrate washing with the UV wash mill, carry out ultrasonic washing with ultrapure water again.Under 120 ℃, substrate is carried out thermal treatment in 3 minutes, make the surface state stabilization.

With substrate cooling, with after the adjustment to 23 ℃, use glass substrate with slit-shaped nozzle with spreader (エ Off エ one エ ス ア ジ ア (FAS Asia) corporate system, trade name: MH-1600), the heavy colour composition K1 that coating prepares as stated.Then with VCD (chemical industry society system is answered in Minton dryer, Tokyo) with 30 seconds a part of dryings with solvent, coating layer is lost flowability after, 120 ℃ of following prebakings 3 minutes, obtain the heavy colour composition layer K1 of thickness 2.3 μ m.

Use has convergence (proximity) the type exposure machine (Hightech electronic engineering Co., Ltd. of Hitachi system) of extra-high-pressure mercury vapour lamp; Make under substrate and the vertical state that is standing of mask (quartzy exposed mask) with picture pattern; With the distance setting between exposed mask face and the heavy colour photographic layer K1 is 200 μ m, under nitrogen atmosphere with exposure 300mJ/cm ²Carry out pattern exposure, form the wide 20 μ m in next door, the wide 100 μ m in space.

Then; Use spray spout that pure water is sprayed; After making the surface of heavy colour composition layer K1 evenly moistening, using KOH is that imaging liquid (contains non-ionic surfactant, with trade name: CDK-1; 100 times of Fuji Photo film electronic material (strain) system dilutions) under 23 ℃, 80 seconds, flat mouthful nozzle pressure 0.04MPa, spray video picture, obtain the patterning image.Then, adopt the UHV (ultra-high voltage) Washing spray nozzle,, residue removed with the pressure injection ultrapure water of 9.8MPa, under atmosphere with exposure 2500mJ/cm ²Carry out post-exposure from above, 240 ℃ of down heating 50 minutes, obtain thickness 2.0 μ m, optical concentration 4.0, have the next door of the strip of the wide peristome of 100 μ m with baking oven.

[ink-resistant liquefaction plasma treatment]

Use negative electrode coupling manner parallel plate-type plasma treatment appts, under following condition, the substrate that has formed the next door is carried out ink-resistant liquefaction plasma treatment.

(condition)

Using gases: CF ₄

Gas flow: 80sccm

Pressure: 40Pa

RF power: 50W

Processing time: 30 seconds

The preparation of-dispersible pigment dispersion-

Be shown in cooperation spreading agent (above-claimed cpd 1) and solvent (1 in the bromination phthalocyanine green (C.I. pigment green 36, trade name: Rionol Green6YK, Japan's China ink liquid manufacturing (strain) system) by 2 of below table; 3-butylene glycol diacetate esters) (below be abbreviated as 1,3-BGDA), after the premixed; With electronic grinding machine M-50 (EIGER JAPAN K.K. system); Zirconium oxide bead with filling rate 80% use diameter 0.65mm disperseed 25 hours with peripheral speed 9m/s, and G is with pigment dispersing thing (G1) in preparation.G with dispersible pigment dispersion (G1) in, except cooperation pigment as shown in table 2 with other composition, with G with dispersible pigment dispersion (G1) likewise prepare G with pigment dispersing thing (G2), R with dispersible pigment dispersion (R1), (R2), B with dispersible pigment dispersion (B1), (B2).Moreover, use day system Nanotrack UPA-EX150 of machine dress society to measure the number average bead diameter of this dispersible pigment dispersion.

Table 2

(mass parts)

Then, the prescription shown in below table 3 mixes solvent, monomer, surfactant component, after stirring 30 minutes under 25 ℃, confirms no insolubles, prepares monomer solution.

Then, with dispersible pigment dispersion (G2), above-mentioned monomer liquid is slowly added on the limit to limit stirring G with dispersible pigment dispersion (G1), G, stirs 30 minutes down at 25 ℃, and G is with inkjet ink (black liquid G-1) in preparation.

Below likewise prepare R with inkjet ink (black liquid R-1), B with inkjet ink (black liquid B-1) black liquid of all kinds.

Employed raw-material details is shown.

C.I.P.R.254 (trade name: Irgaphor Red B-CF, CIBA SPECIALTYCHEMICALS (strain) system)

C.I.P.R.177 (trade name: Cromophtal Red A2B, CIBA SPECIALTYCHEMICALS (strain) system)

C.I.P.Y.150 (trade name: Bayplast Yellow 5GN 01, Bayer (バ イ エ Le) Co., Ltd.'s system)

C.I.P.B.15:6 (trade name: Rionol Blue ES, Japan's China ink liquid manufacturing (strain) system)

C.I.P.Y.23 (trade name: Hostaperm Violet RL-NF, CLARIANT JAPANK.K. system)

1,3-BGDA (1,3 butylene glycol diacetate esters, 232 ℃ of boiling points)

DPHA (Japanese chemical drug (strain) system, trade name: KAYARAD DPHA)

Surfactant: the works 1 shown in the hurdle of above-mentioned surfactant 1

Table 3

The formation of the pixel portions of-employing ink-jetting style-

Use inkjet ink R-1, G-1, the B-1 of above-mentioned making in the present embodiment, adopt following mode to carry out beating of black liquid and drip.

Head 100 shown in Figure 1 possesses the ink gun of 3 system SX-3 of Dimatix society as 3 looks, and ejection control device 200 has used special-purpose piezoelectric driving circuit and platform control special circuit.SX-3 is the head of type Piezoelectric Driving as required, and the arranged spaced with 508 μ m in a stature has 128 nozzles.

When driving piezoelectricity, making the central value of voltage is 50V, and making pulse wide is 8 microseconds, observe and the spray volume instrumentation through the above-mentioned shape of circling in the air, to the voltage of each nozzle regulate so that from the difference of the spray volume of each nozzle in 2%.

The central value of spray volume is that 8ng/ drips.

Carrying the substrate platform 400 of putting the substrate of making in the above-mentioned operation is the plate that is placed on the aluminum on the Special Automatic bidimensional mobile platform, is fixed on the mobile platform.

The head and the interval of substrate are adjusted to 500 μ m, after the Piezoelectric Driving with head, form black drop, fall within time on the substrate until bullet and are about for 63 μ seconds.

The size of the pixel on the substrate, directions X are 300 μ m, and the Y direction is 100 μ m, through making head with respect to directions X 53.8 degree that tilt, reach 300 μ m at interval thereby regulate the nozzle that makes on Y direction apparent.

Driving frequency when piezoelectricity will be beaten continuously and drip is set at 10KHz, with the uniform velocity of 8.2cm/ second substrate is moved, and in the interval of the directions X 270 μ m of pixel, beats 33 264ng.

In addition, substrate is moved, beat to a plurality of recesses under these conditions and drip black liquid.

Then, use hot plate after 2 minutes, in 230 ℃ baking oven, to bake 30 minutes, thereby make next door, the equal full solidification of pixel, make obtaining color filter at 100 ℃ of following heat dryings.At this moment, drip black liquid to begin until the required time of initial heat drying be 2 minutes from beating.

< making of display device >

And then on R pixel, G pixel and B pixel and next door, adopt sputter to form the transparency electrode of ITO (tin indium oxide) by the above-mentioned colour filtering chip basic board that obtains.In addition, prepare glass substrate, at the patterning of implementing to be used for the PVA pattern on the transparency electrode of colour filtering chip basic board and on the subtend substrate respectively as the subtend substrate.

The suitable part in the top in the next door on the transparency electrode of aforementioned ITO is provided with optical spacer, and the alignment films that is formed by polyimide is set above that again.

Then; The sealant that employing divider mode is coated with ultraviolet curable resin on the position that the next door housing of setting is suitable around is to surround the pixel of color filter; The PVA pattern of dripping is used liquid crystal; Behind the subtend baseplate-laminating, behind the substrate irradiation UV that fits, heat-treat so that sealant cures.The polaroid HLC2-2518 of (strain) SANRITZ system is sticked on two sides at the liquid crystal cells that obtains like this.Then, constitute the backlight of cold-cathode tube, be configured in a side at the back side that becomes the liquid crystal cells that is provided with aforementioned polaroid, make the liquid crystal indicator 1 of embodiment.

[embodiment 2]

Employing after 2 minutes, baked in 230 ℃ baking oven 30 minutes at 100 ℃ of following heat dryings with hot plate, thereby makes next door, the equal full solidification of pixel after having carried out next door formation, the ejection of black liquid with embodiment 1 same gimmick, made obtaining color filter.At this moment, drip black liquid to begin until the required time of initial heat drying be 1 minute from beating.

[embodiment 3]

< formation in next door >

(making of heavy colour photosensitive transfer printing material K1)

Use the slit-shaped nozzle, coating is used coating fluid by the thermoplastic resin that following prescription H1 forms on the interim supporter of polyethylene terephthalate film of thick 75 μ m, carries out drying.Then, coating is used coating fluid by the middle layer that following prescription P1 forms, and carries out drying.Be coated with above-mentioned heavy colour composition K1 again, carry out drying.On interim supporter, the thermoplastic resin that dry film thickness is 14.6 μ m is set like this, middle layer and the dry film thickness that dry film thickness is 1.6 μ m is the heavy colour composition layer of 2.3 μ m, last crimping diaphragm (polypropylene screens of thick 12 μ m).

Make the heavy colour photosensitive transfer printing material that interim supporter and thermoplastic resin and middle layer (oxygen screened film) and heavy colour composition layer become one like this, the sample name is designated as heavy colour photosensitive transfer printing material K1.

< thermoplastic resin is used coating fluid: prescription H1 >

11.1 parts of methyl alcohol

6.36 parts of propylene glycol methyl ether acetates

52.4 parts of methyl ethyl ketones

Methyl methacrylate/2-EHA/benzyl methacrylate/methacrylic acid copolymer (copolymerization ratio of components (mol ratio)=55/11.7/4.5/28.8, molecular weight=100,000,70 ℃ of Tg ≒)

5.83 part

13.6 parts of styrene/acrylic acid co-polymer (copolymerization ratio of components (mol ratio)=63/37, mean molecular weight=10,000,100 ℃ of Tg ≒)

2,9.1 parts in two [4-(methacryloxy polyethoxy) phenyl] propane (Xin Zhong village chemical industry (strain) system) of 2-

1 0.54 parts in surfactant

< coating fluid is used in the middle layer: prescription P1 >

32.2 parts of PVA205 (polyvinyl alcohol (PVA), (strain) Kuraray (KURARAY) system, saponification degree=88%, the degree of polymerization 550)

14.9 parts of polyvinyl pyrrolidones (ISP Japan society system, K-30)

524 parts of distilled water

429 parts of methyl alcohol

The limit is adopted spray process that alkali-free glass substrate is sprayed and is adjusted to 25 ℃ 20 seconds of glass washing agent liquid; Wash with the rotating brush with nylon hair on the limit; Behind the pure water spray washing; Adopt spray process to spray 20 seconds of silane coupling agent liquid (N-β (aminoethyl) the γ-An Bingjisanjiayangjiguiwan 0.3 quality % WS, trade name: KBM603, SHIN-ETSU HANTOTAI's chemical industry (strain) system), carry out the pure water spray washing.This substrate was heated 2 minutes under 100 ℃ with the substrate preheating apparatus.

Remove coverlay from the heavy colour photosensitive transfer printing material K1 that adopts above-mentioned method for making to make; Overlap on the silane coupled processing glass substrate that obtains; The surface of the heavy colour composition layer that exposes after removing and the surface of above-mentioned silane coupled processing glass substrate are joined; Use laminating machine (イ of Co., Ltd. Hitachi Application ダ ス ト リ イ ズ system (LamicII type)); Heating under aforementioned 100 ℃ on 2 minutes the substrate, under 130 ℃ of rubber rollers temperature, line pressure 100N/cm, transporting velocity 2.2m/ minute, carrying out lamination.Then, the interim supporter of polyethylene terephthalate being peeled off, interim supporter is removed with the interface of thermoplastic resin.After interim supporter peeled off; With convergence type exposure machine (Hightech electronic engineering Co., Ltd. of Hitachi system) with extra-high-pressure mercury vapour lamp; Make under substrate and the vertical state that is standing of mask (quartzy exposed mask) with picture pattern; With the distance setting between exposure mask face and this heavy colour composition layer is 200 μ m, with exposure 70mJ/cm ²Carry out pattern exposure.

Then; Under 30 ℃, 50 seconds, flat mouthful nozzle pressure 0.04MPa, (contain 30 quality % triethanolamines with triethanolamine class imaging liquid; Trade name: T-PD2; Fuji Photo Film Co., Ltd.'s system sprays video picture with pure water with the liquid (ratio with 1 mass parts T-PD2 and 11 mass parts pure water is mixed) that it dilutes 12 times, and thermoplastic resin and middle layer are removed.Then, to this blow air above substrate, after liquid removed, adopt spray process to spray 10 seconds of pure water, carry out the pure water spray washing, blow air reduces the liquid residue on the substrate.

Then; Using sodium carbonate is imaging liquid (soda mint, the sodium carbonate of 0.47 mol, the nekal of 5 quality %, anionic surfactant, foam-breaking agent, the stabilizing agent that contain 0.38 mol, trade name: T-CD1, Fuji Photo Film Co., Ltd.'s system; With its liquid) with 5 times of pure water dilutions; Under 29 ℃, 30 seconds, pyramid type nozzle pressure 0.15MPa, spray video picture, make the video picture of heavy colour composition layer, obtain the patterning image.

Then; With pure water washing agent (is contained phosphate silicate non-ionic surfactant foam-breaking agent stabilizing agent; Trade name: T-SD1, Fuji Photo Film Co., Ltd.'s system) 10 times of uses of dilution are adopted under 33 ℃, 20 seconds, pyramid type nozzle pressure 0.02MPa and are sprayed; Thereby the image that forms with the rotating brush wiping with nylon hair is again removed residue, obtains the next door.

Then, for this substrate,, use the exposure machine that uses in the above-mentioned exposure process, with 3000mJ/cm except not using the mask from the two sides ²Exposure carry out post-exposure from above after, under 220 ℃, heat-treated 15 minutes, obtain optical concentration 3.9, thickness 2.0 μ m, have the next door of the strip of the wide peristome of 100 μ m.

Then, adopting following method to carry out ink-resistant liquid handles.

[adopting the ink-resistant liquefaction processing of rubbing method]

On the substrate that has formed the next door; Use in the coating in advance of slit-shaped nozzle and add the soluble photoresist of alkali (HOECHST JAPAN corporate system, positive light anti-etching agent AZP4210) that 0.5% (with respect to the solid constituent of photoresist) fluorine class surfactant (Sumitomo 3M society system, FLUORAD FC-430) is arranged; Making thickness is 2 μ m, in warm wind circulation dryer, under 90 ℃, carries out thermal treatment in 30 minutes.

Then, with 110mJ/cm ²(38mW/cm ²* 2.9 seconds) exposure; Make public through the next door from the substrate back that has formed the next door; After dipping shakes 80 seconds in inorganic base imaging liquid (HOECHST JAPAN corporate system, AZ400K DEVELOPER, 1: 4); In pure water, carry out 30～60 seconds rinsing processing, through forming the waterproof resin layer on the next door, it is poor that surface energy is set inside and outside pixel.With regard to the surface energy inside and outside the pixel after the waterproof resin layer forms, pixel outer (on the resin bed) is 10～15dyne/cm, and (on the glass substrate) is about 55dyne/cm in the pixel.

Then, likewise use black liquid R-1, G-1, B-1 to carry out the ejection of black liquid with embodiment 1, with the same condition of embodiment 1 under carry out drying and bake, make all full solidification of next door and each pixel, making obtaining color filter.

[comparative example 1]

Employing after 2 minutes, baked in 230 ℃ baking oven 30 minutes at 100 ℃ of following heat dryings with hot plate, thereby makes next door, the equal full solidification of pixel after having carried out next door formation, the ejection of black liquid with embodiment 1 same gimmick, made obtaining color filter.At this moment, drip black liquid to begin until the required time of initial heat drying be 45 seconds from beating.

[comparative example 2]

Employing after 2 minutes, baked in 230 ℃ baking oven 30 minutes at 100 ℃ of following heat dryings with hot plate, thereby makes next door, the equal full solidification of pixel after having carried out next door formation, the ejection of black liquid with embodiment 3 same gimmicks, made obtaining color filter.At this moment, drip black liquid to begin until the required time of initial heat drying be 50 seconds from beating.

< evaluation >

For color filter that obtains in embodiment and the comparative example and display device, carry out following evaluation.

< evaluation of display device >

Whether the Visual Confirmation display device can normally show.

Make R, G, B include monochrome pixels color development, with 10 people it is judged respectively to have or not color spot to produce in the scope of area 10cm * 10cm, estimate by following benchmark.The evaluation result of the color spot of display device is shown in table 4.

[metewand]

Zero: thinking has the number of color spot: 0 people.

△: thinking has the number of color spot: 1 people～2 people.

*: thinking has the number of color spot: more than 3 people.

< flatness evaluation >

For each colour filtering chip basic board; From the end of heavy colour separates walls in the direction parallel with real estate; Measure the amplitude of fluctuation of 10 μ m with contact pin type film thickness gauge (P10, KLA-TENCOR (strain) system), estimate according to following metewand with the thickness (thickness of substrate normal direction) of interior R pixel, G pixel, B pixel.

[metewand]

Zero: less than 0.1 μ m.

△: more than the 0.1 μ m, less than 0.2 μ m.

*: more than the 0.2 μ m.

< ITO resistance >

Mensuration has the ITO resistance (Mitsubishi Chemical's (strain) system " ロ レ ス タ " is measured sheet resistance with four probe method) of the color filter of ITO.

Above evaluation result is shown in table 4.

Table 4

	Color spot	The pixel flatness	The ITO resistance value
				Embodiment
1	○	△	12Ω/□
				Embodiment 2	△	○	15Ω/□
Embodiment 3	○	○	8Ω/□
				Comparative example 1	×	×	24Ω/□
Comparative example 2	×	×	22Ω/□

Can know by table 4, adopt the color filter of the manufacturing approach manufacturing of color filter of the present invention to have excellent pixel flatness.Can know that in addition the generation of the color spot of display device of the present invention is few.

Claims (7)

1. the manufacturing approach of a color filter, it comprises:

The black liquid that the recess that adopts ink-jetting style to surround to the next door that is formed on the substrate gives the drop of inkjet ink for color filter give operation and

Said drop is carried out the operation that bakes of heat treated;

Said black liquid gives operation and the said time interval that bakes operation is more than 1 minute.

2. the manufacturing approach of color filter as claimed in claim 1, wherein,

Said black liquid contains colorant, organic solvent and monomer.

3. the manufacturing approach of color filter as claimed in claim 2, wherein,

Said black liquid also contains at least a kind that from the group that spreading agent, bonding agent, Photoepolymerizationinitiater initiater, thermal polymerization and surfactant constitute, selects.

4. the manufacturing approach of color filter as claimed in claim 2, wherein,

Be that 4 officials can above monomer more than the 50 quality % in the said monomer total amount.

5. the manufacturing approach of color filter as claimed in claim 2, wherein,

The boiling point of said organic solvent is below 290 ℃.

6. color filter that the manufacturing approach that adopts the described color filter of claim 1 is made.

7. display device that possesses the described color filter of claim 6.

Images