WO2015064438A1 - 薄膜の製造方法、透明導電膜 - Google Patents
薄膜の製造方法、透明導電膜 Download PDFInfo
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- WO2015064438A1 WO2015064438A1 PCT/JP2014/078064 JP2014078064W WO2015064438A1 WO 2015064438 A1 WO2015064438 A1 WO 2015064438A1 JP 2014078064 W JP2014078064 W JP 2014078064W WO 2015064438 A1 WO2015064438 A1 WO 2015064438A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/60—Deposition of organic layers from vapour phase
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
Definitions
- the present invention relates to a method for forming a thin film and a transparent conductive film.
- the present invention claims the priority of Japanese Patent Application No. 2013-225549 filed on October 30, 2013, and for the designated countries where weaving by reference of documents is permitted, the contents described in the application are as follows: Is incorporated into this application by reference.
- Transparent conductive films made of indium tin oxide (ITO), zinc oxide (ZnO) or the like are widely used as transparent electrodes for liquid crystal displays and solar cells. These transparent conductive films are generally generated by a sputtering method.
- Patent Document 1 discloses that “a first container (5A) containing a material solution containing metal (10) and a second container (5B, containing hydrogen peroxide). 18), a reaction vessel (1) having a heater (3) on which the substrate (2) is arranged and heating the substrate, the first vessel and the reaction vessel are connected, and the material solution is A first path (L1) for supplying the first container to the reaction container, the second container and the reaction container are connected, and the hydrogen peroxide is transferred from the second container to the reaction container. And a second path (L2) for supplying the metal oxide film.
- a metal oxide film is formed by reacting a metal-containing material solution and hydrogen peroxide on a heated substrate.
- the object of the present invention is to provide a new method for obtaining a thin film, which replaces the above-described conventional technology.
- a thin film manufacturing method includes a mist forming step of misting a dispersion containing fine particles, and a mist-formed dispersion as a substrate. And a drying step of drying the dispersion supplied onto the substrate.
- the thin film manufacturing method according to an aspect of the present invention may be characterized in that the particle size of the fine particles contained in the mist-dispersed dispersion is 100 nm or less.
- the substrate in the method for manufacturing a thin film according to an aspect of the present invention may include a resin and have flexibility.
- drying step in the thin film manufacturing method according to an aspect of the present invention may be performed at a temperature lower than the softening point of the substrate.
- drying step in the thin film manufacturing method according to an aspect of the present invention may be performed at a temperature of 10 ° C. or higher and 40 ° C. or lower.
- the thin film manufacturing method includes a hydrophilic / hydrophobic pattern forming step of forming a pattern including a hydrophilic portion and a water-repellent portion on the substrate, and the parent / hydrophobic pattern forming step includes the parent / water-repellent pattern forming step.
- the supplying step may be performed on the substrate on which the water repellent pattern is formed.
- the manufacturing method of the thin film which concerns on the aspect of this invention is equipped with the ultraviolet irradiation process which irradiates an ultraviolet-ray with respect to the said board
- the manufacturing method of the thin film which concerns on the aspect of this invention is contained in the said mist supplied in the said mist supplied before the said ultraviolet irradiation process in the said supply process, and the said mist supplied after the said ultraviolet irradiation process. It may be different from the fine particles.
- the ultraviolet rays irradiated in the ultraviolet irradiation step in the method for manufacturing a thin film according to an aspect of the present invention may include at least a wavelength of 200 nm or less.
- the thin film manufacturing method according to an aspect of the present invention may be characterized in that, in the supplying step, the substrate is inclined with respect to a horizontal plane.
- the thin film manufacturing method according to an aspect of the present invention may be characterized in that, in the supplying step, the substrate is inclined with respect to a plane orthogonal to the supplying direction.
- the fine particles in the method for producing a thin film according to an aspect of the present invention may be metal oxide fine particles containing any of indium, zinc, tin, and titanium.
- the transparent conductive film according to an aspect of the present invention is manufactured by the above-described thin film manufacturing method.
- FIG. 1 is a cross-sectional view for explaining an example of a thin film forming method according to the present embodiment.
- the substrate 10 is prepared.
- a generally used substrate material can be used.
- glass polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyethersulfone (PES), polyetherimide, polyetheretherketone, polyphenylene sulfide, polyarylate, polyimide, polycarbonate (PC), cellulose triacetate (TAC) ), Cellulose acetate propionate (CAP), and the like.
- the substrate 10 is cleaned as necessary.
- a cleaning method a general method such as ultrasonic cleaning can be used.
- the substrate 10 is irradiated with UV (ultraviolet).
- a general UV irradiation apparatus is used for UV irradiation, but it is desirable to irradiate ultraviolet rays having a wavelength of 200 nm or less (for example, 10 nm to 200 nm).
- UV ultraviolet rays having a wavelength of 200 nm or less (for example, 10 nm to 200 nm).
- the metal oxide film 2 is formed by spraying a mist made of a dispersion containing fine particles onto the substrate 10.
- FIG. 2 is a diagram showing an example of a film forming apparatus in the present embodiment.
- the film forming apparatus includes a first tank that generates mist containing fine particles, a second tank that is a mist trap that makes mist uniform, and a third tank that sprays mist on the substrate 10.
- a raw material solution 5 which is a dispersion liquid in which fine particles are dispersed in a dispersion medium is stored.
- the fine particles conductive metal fine particles such as indium, zinc, tin, or titanium, or metal oxide fine particles containing at least one of them can be used. These may be used alone or in any combination of two or more.
- the fine particles are nano fine particles having a particle size of 1 to 100 nm.
- the average value of the major axis and minor axis of fine particles obtained from an SEM image can be used, for example. In the present embodiment, description will be made assuming that metal oxide fine particles are used as the fine particles.
- the dispersion medium only needs to be able to disperse the fine particles, and water, alcohols such as isopropyl alcohol (IPA) and ethanol, and mixtures thereof can be used.
- IPA isopropyl alcohol
- air 22 for forming a mist flow path is poured into the first tank.
- the ultrasonic vibrator 21 is stored in the first tank.
- the ultrasonic vibrator 21 mists the dispersion liquid containing the metal oxide fine particles.
- the particle size of the mist is desirably 10 ⁇ m or less (for example, 1 to 10 ⁇ m).
- generated by the 1st tank is conveyed to a 2nd tank via the pipe
- excess mist accumulates in the lower part of the tank, and the mist having a uniform particle diameter is conveyed to the third layer via a pipe provided in the second tank. It is desirable that a mist having a particle diameter of 5 ⁇ m or less (for example, 1 to 5 ⁇ m) is conveyed from the second tank to the third tank.
- the substrate 10 is disposed in the third tank, and the mist conveyed from the second tank is sprayed on the substrate.
- mist is sprayed on the substrate 10 for a predetermined time.
- the mist dispersion medium adhering to the substrate 10 is vaporized, whereby a metal oxide film is formed on the surface of the substrate 10.
- new mist adheres on the substrate 10 before the mist vaporizes, so that the dispersion liquid in droplets flows down and a uniform metal oxide film is formed on the substrate 10. Will not be formed.
- the time for stopping the spraying of mist on the substrate 10 may be a point in time when the mist containing the metal oxide fine particles is liquefied and flows down from the substrate 10, or a metal oxide film having a desired film thickness is formed on the substrate 10. It may be the time when it was formed.
- the third tank if the substrate 10 is heated excessively, it may be deformed due to softening. Therefore, in the third tank, it is desirable that mist is sprayed at a temperature lower than the softening point of the substrate to form a metal oxide film. Further, when the substrate 10 is heated to a predetermined temperature or higher during mist spraying, the metal oxide fine particles adhering to the substrate 10 are aggregated to form a metal oxide film having a high resistance value. For this reason, it is more desirable that the mist is sprayed at a temperature of 40 ° C. or lower (for example, 10 ° C. to 40 ° C.) to form a metal oxide film.
- a temperature of 40 ° C. or lower for example, 10 ° C. to 40 ° C.
- the softening point means a temperature at which the substrate softens and begins to deform when the substrate is heated.
- the softening point can be determined by a test method according to JIS K7207 (Method A).
- a water repellent film is selectively formed on the substrate 10 in advance to attach mist to the hydrophilic portion.
- the dispersion liquid adhering to the water repellent part is not water repellent, and a metal oxide film cannot be selectively formed.
- the mist is sprayed on the substrate 10 inclined with respect to the plane orthogonal to the spraying direction of the mist. This is because excess metal oxide fine particles adhering to the water-repellent part are removed by the mist spraying force.
- the film forming apparatus may omit the mist trap in the second tank. By doing so, the metal oxide film can be formed on the substrate with a simpler apparatus.
- mist generation method in addition to the generation using the ultrasonic vibrator 21 described above, an electrostatic method in which a mist is generated by directly applying a voltage to a thin tube for spraying droplets, and a flow rate is increased by applying pressure. Pressurized type that scatters generated mist by colliding the generated gas with liquid, a rotating disk type that drops droplets on a high-speed rotating disk and scatters generated mist by centrifugal force, micro-sized hole A liquid droplet is allowed to pass through an orifice plate having a liquid crystal, and an orifice vibration type that generates a micro-sized liquid droplet by cutting the liquid droplet by applying vibration by a piezoelectric element or the like can be used. About the generation method of mist, these methods are selected suitably according to cost, performance, etc. Of course, a mist may be generated by combining a plurality of methods.
- the substrate 10 on which the metal oxide film 2 is formed is heated for drying.
- the heating temperature at this time is desirably lower than the softening point of the substrate 10. Heating may be performed in a low vacuum of about 30 Pa or in an Ar gas atmosphere.
- the thermal condition is properly selected according to the film formation condition. In this step, drying is not necessarily performed by heating. For example, you may dry by installing the board
- the above-described first step is not necessarily a necessary step. Since it is a step performed as a pretreatment for attaching mist on the substrate 10 in the second step, any method may be used as long as mist is attached on the substrate 10.
- a metal oxide film is formed on the substrate 10, but by performing the processing from the first step to the third step again as necessary, the second layer metal oxide film is formed. Can be obtained. In this case, the substrate cleaning in the first step can be omitted.
- a metal oxide film having a sufficient thickness can be obtained by using the metal oxide fine particles contained in the mist of the first layer and the metal oxide fine particles in the second tank as the same material.
- the conductive film can be properly used depending on the application and purpose.
- film formation is performed without heating the substrate in the thin film formation process. For this reason, a metal oxide film having a low resistance value can be obtained. Further, it is possible to effectively form a film even on a substrate that is weak against heat.
- FIG. 3 is a cross-sectional view for explaining an example of a method for producing a conductive film according to this modification.
- a conductive film is manufactured using the metal oxide film formed according to the above-described embodiment.
- the manufactured conductive film is used for a touch panel or the like as a capacitance switch.
- the UV irradiation is performed for the purpose of removing impurities on the substrate 10. Note that the first step may be omitted.
- the resist 11 is a general photosensitive material used for a photoresist, and a known coating method such as a spin coating method, a dip coating method, or a spray method can be used for coating.
- the substrate 10 is selectively exposed. Specifically, a part of the resist 11 on the substrate 10 is selectively exposed using a photomask having a desired pattern in advance. Thereafter, the substrate 10 is developed to obtain a resist 11 patterned into a desired shape.
- a photomask selectively masked in the x direction (left and right direction in FIG. 3) of the substrate 10.
- the water repellent film 3 is formed on the substrate 10.
- an existing material such as a fluorine-based water repellent is used.
- 3M TM Novell TM EGC-1720 manufactured by Sumitomo 3M Limited
- the film formation method of the water repellent film 3 is performed using the existing film formation method as in the case of the application of the resist 11 described above.
- the resist 11 on the substrate 10 is peeled off.
- the resist 11 is stripped using an existing stripping solution such as acetone.
- the water repellent film formed on the resist 11 is also peeled off. Thereby, the water repellent film 3 which forms a desired pattern can be obtained.
- the dispersion containing the metal oxide fine particles is misted and sprayed on the substrate 10 to form the metal oxide film 2.
- film formation is performed by spraying mist using the film formation apparatus shown in FIG. Since the water-repellent film 3 is selectively formed on the substrate 10, the liquefied dispersion liquid adheres to a portion where the water-repellent film 3 is not formed on the substrate 10, that is, a hydrophilic portion. A film 2 is formed.
- the dispersion liquid temporarily adhering to the water repellent part flows down the water repellent part due to the inclination of the substrate 10 and adheres to the adjacent hydrophilic part, or flows down the substrate 10 and accumulates at the bottom of the third tank.
- the metal oxide film 2 formed on the substrate 10 is then heated and dried.
- the insulating film 4 is formed on the substrate 10. Note that before the insulating film 4 is formed, UV irradiation can be performed on the substrate. This is because by performing UV irradiation on the water repellent film 3, the water repellency is lowered to assist the formation of the insulating film 4. However, when the insulating film 4 is formed using a material having a high viscosity such as an organic material, it is not necessary to consider the water repellency of the water repellent film 3 and thus UV irradiation is not necessary. In consideration of the material of the insulating film 4 and the like, after performing UV irradiation as necessary, the insulating film 4 is formed on the substrate 10.
- the insulating film 4 is formed on the water repellent film 3 and the metal oxide film 2.
- a nonconductive material such as SnO 2 is used.
- the method of forming the insulating film 4 the film is formed by applying a predetermined material over the entire surface using an existing method such as a spin coating method, a bar coating method, or a dip coating method.
- FIG. 4 is a cross-sectional view (No. 2) for explaining an example of the touch panel manufacturing method according to the present modification.
- the substrate 10 is irradiated with UV.
- the reason for irradiating UV is to facilitate the formation of the second metal oxide film on the insulating film 4.
- the substrate 10 is selectively exposed and developed.
- exposure is performed using a photomask that is selectively masked in the x direction of the substrate 10.
- the y direction of the substrate 10 (direction perpendicular to the left-right direction in FIG. 4) is selective. It is assumed that the exposure is performed using a photomask masked in (1).
- the exposure and development are performed in the same procedure as in the third step.
- Steps 11 and 12 Next, the water repellent film 3 is applied to the substrate 10. Thereafter, the resist 11 remaining on the substrate 10 is peeled off together with the water repellent film 3 formed on the resist 11.
- the eleventh step and the twelfth step are performed in the same procedure as the fourth step and the fifth step.
- a second-layer metal oxide film 2 is formed on the substrate 10.
- the film forming apparatus shown in FIG. 2 is used as in the sixth step. Thereafter, the metal oxide film 2 is dried.
- the metal oxide film 2 is selectively formed in the y direction of the substrate 10 in the second layer, in the cross-sectional view of the substrate 10, the second metal oxide film 2 over the entire substrate 10. It is described that is formed.
- the insulating film 4 is formed on the substrate 10.
- the insulating film 4 is formed on the metal oxide film 2 formed in the thirteenth step.
- the insulating film 4 is formed by the same film forming method as in the seventh step and using the same material.
- a metal oxide film having a patterning shape is formed, and a protective layer made of an insulating film is formed on the outermost surface, whereby a touch panel that operates according to a change in capacitance can be generated.
- a metal oxide film having a lower resistance value and higher transparency than a general metal oxide film can be obtained.
- FIG. 5 is a diagram showing an outline of the Roll to Roll method manufacturing apparatus.
- the film 20 formed in a roll shape is installed on one side of the apparatus, the film 20 on which the metal oxide film is formed is discharged from the other side of the apparatus.
- the film 20 is used as a substrate in the above-described embodiment, and includes a resin and has flexibility.
- Step 1 Washing First, the film 20 is washed.
- a cleaning method a general method such as ultrasonic cleaning is used.
- the film 20 is irradiated with UV.
- a general UV irradiation apparatus is used for UV irradiation, but it is desirable to irradiate ultraviolet rays having a wavelength of 200 nm or less.
- step 3 the mist generated from the dispersion liquid in which the metal oxide fine particles are dispersed is sprayed on the film 20.
- the film forming apparatus used in step 3 is the film forming apparatus described in FIG. As described above, in the film forming apparatus, the metal oxide film is formed at a temperature lower than the softening point of the film 20. By this step, the film 20 with the metal oxide film attached can be obtained.
- Process 4 Heating
- the film 20 is heated, and the metal oxide film attached to the film 20 in step 3 is dried. As described above, the temperature used for heating is lower than the softening point of the film 20.
- Step 5 Slow cooling
- the film 20 is gradually cooled.
- the film 20 may be cooled using a cooling device.
- Step 6 UV irradiation
- a second metal oxide film is formed on the generated metal oxide film. Therefore, in this step, the film 20 is irradiated with UV to remove impurities and improve hydrophilicity. Note that when the formation of the metal oxide film is completed in one layer, the steps after this step are omitted.
- Step 7 mist is sprayed on the film 20.
- a metal oxide film is formed on the film 20 using the film forming apparatus shown in FIG.
- a second metal oxide film is formed on the first metal oxide film formed in step 3.
- Step 8 Heating
- the film 20 is heated, and the metal oxide film attached to the film 20 in step 8 is dried.
- Step 9 Slow cooling
- the film 20 is gradually cooled.
- a metal oxide film can be continuously formed on a roll-shaped substrate by using the Roll-to-Roll manufacturing apparatus.
- a metal oxide film with high performance can be formed using a temperature lower than the softening point of a flexible substrate including a resin.
- Example 1 First, an aqueous dispersion (NanoTek Slurry: manufactured by Cii Kasei) containing ITO fine particles was prepared.
- the particle diameter of the ITO fine particles was 10 to 50 nm, and the average particle diameter was 30 nm.
- the materials and particle diameters of the ITO fine particles used in the other examples below are the same as in this example.
- the concentration of the metal oxide fine particles in the dispersion is 15 wt. %Met.
- the prepared dispersion was put into the first tank of the film forming apparatus described above, and a 2.4 MHz voltage was applied by an ultrasonic vibrator (manufactured by Hyundai Electronics Co., Ltd.) to generate mist.
- the film forming apparatus used in the present example omits the second tank, which is a mist trap. Therefore, the mist was sprayed on the substrate in the second tank.
- a soda lime glass substrate was used as the substrate.
- the substrate was placed in a state where the substrate was tilted with respect to the horizontal plane and the substrate was tilted by 45 degrees with respect to a surface perpendicular to the spraying direction of the mist, and the mist was continuously sprayed for 5 minutes. At this time, the substrate was sprayed at room temperature without heating.
- the substrate was heated with different patterns of 100 ° C. to 200 ° C. using an infrared lamp heating device.
- the heating was performed for 10 minutes in a low vacuum of about 30 Pa using a rotary pump or in an inert gas (Ar) atmosphere.
- the surface of the dried ITO film was irradiated with UV (254 nm and 185 nm mixed).
- the substrate was placed in the second tank of the film forming apparatus in the same manner as described above, and mist was continuously sprayed at room temperature for 5 minutes. Thereafter, the substrate was dried by heating with an infrared lamp heating apparatus for 10 minutes in the same manner as described above.
- FIG. 6 is a diagram showing sheet resistance at different heating and drying temperatures.
- the sheet resistance shown here was measured by the four probe method. Referring to the data shown in FIG. 6, it was found that a sheet resistance of 100 ⁇ / sq. was obtained in a low temperature region of 200 ° C. or lower which is the heat resistant temperature of the film constituting the substrate.
- the low vacuum treatment shows a lower resistance in a temperature range of 150 ° C. or higher. I understood.
- FIG. 7 is an SEM image of the obtained ITO film. This figure is the figure which observed the surface of the sample whose heating temperature at the time of drying is 200 degreeC using the scanning electron microscope (SEM). Unevenness is not observed on the surface, and smoothness can be confirmed.
- the metal oxide film formed using mist exhibits low sheet resistance. Further, it has been found that a smooth metal oxide film can be formed without impairing translucency.
- Example 2 An aqueous dispersion containing ITO fine particles is put into the first tank of the above-described film forming apparatus having no mist trap, and a 2.4 MHz voltage is applied by an ultrasonic vibrator (manufactured by Hyundai Electronics Co., Ltd.) to generate mist. It was. By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank. A soda lime glass substrate was used as the substrate.
- the substrate was placed in a state in which the substrate was tilted with respect to the horizontal plane and in a state in which the substrate was tilted with respect to a surface orthogonal to the spraying direction of the mist, and the mist was continuously sprayed for 5 minutes.
- substrates each having a substrate temperature set to 20 ° C. to 200 ° C. were provided. Thereafter, the substrate was dried at room temperature.
- the sheet resistance of the metal oxide films obtained here with different substrate temperatures at the time of film formation was measured by the four-probe method.
- FIG. 8 is a diagram showing sheet resistance at different heating and drying temperatures of the obtained metal oxide film.
- an increase in sheet resistance that is, a decrease in electrical conductivity was confirmed.
- the detection limit of sheet resistance was exceeded about each sample, it was impossible to measure. The detection limit of this measurement was 4 G ⁇ / sq.
- aqueous dispersion containing ITO fine particles was applied onto the substrate 10 by spin coating at 500 rpm. Application was performed at room temperature. After the application, it was dried by heating at a low vacuum of about 30 Pa at a temperature of 200 ° C. for about 10 minutes. Thereafter, the film surface was irradiated with UV (254 nm and 185 nm mixed). Subsequently, an aqueous dispersion containing ITO fine particles was applied to the substrate at 500 rpm by spin coating at room temperature. After the application, it was dried by heating at a low vacuum of about 30 Pa at a temperature of 200 ° C. for about 10 minutes. A soda lime glass substrate was used as the substrate.
- the transmittance of the obtained ITO film was measured at a wavelength of 550 nm using a spectrophotometer, the visible light transmittance was 68%. Further, when the sheet resistance of the obtained ITO film was measured by a four-point probe method, it was 800 M ⁇ / sq.
- FIG. 9 shows the results of surface observation using an SEM image. Compared to FIG. 7 which is an SEM image when film formation is performed by mist, it was confirmed that the surface was rough when film formation was performed using spin coating. Also, the surface resistance value is about three orders of magnitude higher than when film formation is performed with mist, and it is difficult to say that it is at a practical level as a transparent electrode.
- the surface roughness of the film obtained in this comparative example was Ra: 80 nm.
- the film formed by applying the dispersion by spin coating has a rough surface and a resistance value as compared with the film formed by misting the dispersion containing the metal oxide fine particles and spraying it on the substrate. It was found that the visible light transmittance was lowered.
- Example 3 First, an aqueous dispersion (NanoTek Slurry: manufactured by Cii Kasei) containing GZO fine particles was prepared.
- the GZO fine particles had a particle size of 10 to 50 nm and an average particle size of 30 nm.
- the materials and particle diameters of GZO fine particles used in other examples below are the same as in this example.
- the concentration of the metal oxide fine particles in the dispersion is 15 wt. %Met.
- the prepared dispersion was put into the first tank of the above-described film forming apparatus without a mist trap, and a mist was generated by applying a voltage of 2.4 MHz with an ultrasonic vibrator (manufactured by Nissan Electronics Co., Ltd.). By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank. A soda lime glass substrate was used as the substrate.
- the substrate was placed in a state in which the substrate was tilted with respect to the horizontal plane and in a state in which the substrate was tilted with respect to a surface orthogonal to the spraying direction of the mist, and the mist was continuously sprayed for 5 minutes. At this time, the substrate was sprayed at room temperature without heating.
- the substrate was heated at 150 ° C., 175 ° C., and 200 ° C. using an infrared lamp heating device. Heating was performed for about 10 minutes in a low vacuum of about 30 Pa each.
- the surface of the dried GZO film was irradiated with UV (254 nm and 185 nm mixed).
- the substrate was placed in the second tank of the film forming apparatus in the same manner as described above, and mist was continuously sprayed at room temperature for 5 minutes. Thereafter, the substrate was dried by heating with an infrared lamp heating apparatus for 10 minutes in the same manner as described above.
- FIG. 10 is a diagram showing the surface resistance value and visible light transmittance of the obtained GZO film. It was found that a transparent conductive film showing a transmittance of 80% or more in the visible light region can be obtained regardless of whether the drying temperature is 150 ° C., 175 ° C., or 200 ° C. In any case, the sheet resistance was 20 M ⁇ / sq. Or less.
- Example 4 First, an IPA dispersion (NanoTek Slurry: manufactured by Cii Kasei) containing GZO fine particles was prepared. The particle size of GZO and the concentration of metal oxide particles are the same as in Example 3. The prepared dispersion was put into the first tank of the above-described film forming apparatus without a mist trap, and a 2.4 MHz voltage was applied by an ultrasonic vibrator (manufactured by Hyundai Electronics Co., Ltd.) to generate mist. By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank.
- an ultrasonic vibrator manufactured by Nissan Electronics Co., Ltd.
- the substrate was heat-dried for 10 minutes at a low vacuum of about 30 Pa at a temperature of 200 ° C. using an infrared lamp heating device. Thereafter, the surface of the dried GZO film was irradiated with UV (254 nm and 185 nm mixed). Subsequently, the substrate was placed in the second tank of the film forming apparatus in the same manner as described above, and mist was continuously sprayed at room temperature for 5 minutes. Thereafter, the substrate was dried by heating with an infrared lamp heating apparatus for 10 minutes in the same manner as described above. A soda lime glass substrate was used as the substrate.
- the sheet resistance of the obtained film was 10 M ⁇ / sq., And the transmittance in the visible light region was 80% or more.
- FIG. 11 is an SEM image of the obtained GZO film. From the result of the SEM image, it was found that a flat film was formed.
- FIG. 12 is a diagram showing an analysis result by EDX of the obtained GZO film. Specifically, a line scan by energy dispersive X-ray spectroscopy (EDX) was performed on the obtained GZO film. From this figure, it was found that remarkable peaks were observed for Zn and O, and the obtained film was formed of ZnO.
- EDX energy dispersive X-ray spectroscopy
- Example 5 In the same manner as in Example 3, an aqueous dispersion (NanoTek Slurry: manufactured by Cii Kasei) containing GZO fine particles was prepared. The prepared dispersion was put into the first tank of the above-described film forming apparatus without a mist trap, and a 2.4 MHz voltage was applied by an ultrasonic vibrator (manufactured by Hyundai Electronics Co., Ltd.) to generate mist. By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank.
- an ultrasonic vibrator manufactured by Nissan Electronics Co., Ltd.
- the substrate was placed in a state in which the substrate was tilted with respect to the horizontal plane and in a state in which the substrate was tilted with respect to a surface orthogonal to the spraying direction of the mist, and the mist was continuously sprayed for 5 minutes.
- one substrate was heated to 60 ° C. for spraying, and the other substrate was heated to 80 ° C. for spraying.
- a soda lime glass substrate was used as the substrate.
- the substrate was heated at a temperature of 200 ° C. using an infrared lamp heating device. Heating was performed for 10 minutes in a low vacuum of about 30 Pa. Subsequently, after irradiating the surface of the GZO film with UV (254 nm and 185 nm mixed), the substrate is placed in the second tank of the film forming apparatus in the same manner as described above, and the mist is sprayed for 5 minutes while heating the substrate in the same manner. Continued. Thereafter, the substrate was dried by heating with an infrared lamp heating apparatus for 10 minutes in the same manner as described above.
- FIG. 13 is an SEM image of the obtained GZO film.
- the surface morphology was observed using the SEM image, it was confirmed that the surface smoothness of the GZO film formed on the heated substrate was lost.
- FIG. 14 is a diagram showing the relationship between the substrate temperature and the surface resistance during film formation. As the heating temperature during film formation increases, the surface resistance value increases significantly. When the heating temperature at the time of film formation was 80 ° C., the surface resistance value exceeded the detection limit and could not be measured.
- Example 6 A resist was applied uniformly on the substrate using a spin coater, and exposure with i-line was performed to form a pattern with a line and space of 100 ⁇ m. After that, 3M TM Novec TM EGC-1720 (manufactured by Sumitomo 3M Co., Ltd.) was applied to the substrate as a water repellent using a dip coater, and the resist solution was peeled off to obtain a substrate on which a desired water repellent pattern was formed. It was. A PET substrate was used as the substrate.
- Example 2 an aqueous dispersion containing ITO fine particles was placed in the first tank of the above-described film forming apparatus having no mist trap, and 2.4 MHz by an ultrasonic vibrator (manufactured by Hyundai Electronics Co., Ltd.). A mist was generated by applying a voltage of. By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank.
- the substrate was placed in a state in which the substrate was tilted with respect to the horizontal plane and in a state in which the substrate was tilted with respect to a surface orthogonal to the spraying direction of the mist, and the mist was continuously sprayed for 5 minutes. At this time, the substrate was not heated and sprayed with mist at room temperature.
- the substrate was heated at a temperature of 150 ° C. using an infrared lamp heating device. Heating was performed for 10 minutes in a low vacuum of about 30 Pa. Subsequently, after irradiating UV (254 nm, 185 nm mixed) on the film surface generated on the substrate, the substrate was placed in the second tank of the film forming apparatus in the same manner as described above, and mist was continuously sprayed for 5 minutes. Thereafter, the substrate was dried by heating with an infrared lamp heating apparatus for 10 minutes in the same manner as described above.
- FIG. 15 is an SEM image of the ITO film on the water-repellent patterning substrate.
- the ITO film was formed on the hydrophilic portion so as to avoid the water-repellent portion.
- a metal oxide film having an intended pattern can be selectively formed by using a water repellent pattern. I was able to.
- Example 7 A resist was applied uniformly on the substrate using a spin coater, and exposure with i-line was performed to form a pattern with a line and space of 100 ⁇ m. After that, 3M TM Novec TM EGC-1720 (manufactured by Sumitomo 3M Co., Ltd.) was applied to the substrate as a water repellent using a dip coater, and the resist solution was peeled off to obtain a substrate on which a desired water repellent pattern was formed. It was. A PET substrate was used as the substrate.
- Example 3 an aqueous dispersion containing GZO fine particles was prepared, placed in the first tank of a film forming apparatus without a mist trap, and 2.4 MHz by an ultrasonic vibrator (manufactured by Hyundai Electronics Co., Ltd.). A voltage was applied to generate mist. By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank. In the 2nd tank, the board
- the substrate was heated at a temperature of 150 ° C. using an infrared lamp heating device. Heating was performed for 10 minutes in a low vacuum of about 30 Pa. Subsequently, after irradiating UV (254 nm, 185 nm mixed) on the film surface generated on the substrate, the substrate was placed in the second tank of the film forming apparatus in the same manner as described above, and mist was continuously sprayed for 5 minutes. Thereafter, the substrate was dried by heating with an infrared lamp heating apparatus for 10 minutes in the same manner as described above.
- FIG. 16 is an SEM image of the GZO film on the water-repellent patterning substrate. It was confirmed that the water-repellent coating and the hydrophilic portion other than the water-repellent portion were in different states.
- ⁇ Comparative example 2> A resist was applied uniformly on the substrate using a spin coater, and exposure with i-line was performed to form a pattern with a line and space of 100 ⁇ m. After that, 3M TM Novec TM EGC-1720 (manufactured by Sumitomo 3M Co., Ltd.) was applied to the substrate as a water repellent using a dip coater, and the resist solution was peeled off to obtain a substrate on which a desired water repellent pattern was formed. It was. A PET substrate was used as the substrate.
- Example 2 In the same manner as in Example 1, an aqueous dispersion containing ITO fine particles (NanoTek : Slurry: manufactured by CI Kasei Co., Ltd.) is prepared and placed in the first tank of the above-described film forming apparatus without a mist trap. Produced a mist by applying a voltage of 2.4 MHz. By flowing air into the first tank, the obtained mist was transported to the vicinity of the substrate in the second tank.
- a substrate heated to 60 ° C. and a substrate heated to 80 ° C. were installed, and mist was continuously sprayed on each for 5 minutes.
- each substrate was placed in a state where the substrate was tilted with respect to a horizontal plane, and a state where the substrate was tilted 45 degrees with respect to a surface perpendicular to the spraying direction of the mist was sprayed.
- substrate was heated under the temperature of 150 degreeC using the infrared lamp heating apparatus. Heating was performed for 10 minutes in a low vacuum of about 30 Pa.
- FIG. 17 is an SEM view of the substrate heated to 60 ° C. Since the evaporation rate of the dispersion containing the metal oxide fine particles on the heated substrate is extremely high, it is considered that the dispersion attached to the water-repellent part evaporated without being water-repellent. Therefore, it was confirmed that a trace amount of metal oxide film was formed even in the water repellent portion.
- FIG. 18 is an SEM view of the substrate heated to 80 ° C. It was confirmed that the metal oxide film was entirely formed without distinguishing between the hydrophilic portion and the water repellent portion. As a result, no patterning on the line was obtained.
- ⁇ Comparative Example 3> A resist was applied uniformly on the substrate using a spin coater, and exposure with i-line was performed to form a pattern with a line and space of 100 ⁇ m. After that, 3M TM Novec TM EGC-1720 (manufactured by Sumitomo 3M Co., Ltd.) was applied to the substrate as a water repellent using a dip coater, and the resist solution was peeled off to obtain a substrate on which a desired water repellent pattern was formed. It was. A PET substrate was used as the substrate.
- Example 1 an aqueous dispersion containing ITO fine particles (NanoTek® Slurry: manufactured by Cai Kasei Co., Ltd.) was prepared and placed in the first tank of the above-described film forming apparatus having a mist trap. Produced a mist by applying a voltage of 2.4 MHz. By flowing air into the first tank, the obtained mist was conveyed to the vicinity of the substrate in the third tank.
- the substrate was placed so as to be parallel to the horizontal plane and parallel to the plane perpendicular to the spraying direction of the mist, and spraying the mist for 5 minutes. At this time, the substrate was sprayed at room temperature without heating.
- the substrate was heated at a temperature of 200 ° C. using an infrared lamp heating device. Heating was performed for 10 minutes in a low vacuum of about 30 Pa. Subsequently, after irradiating UV (254 nm, 185 nm mixed) on the film surface generated on the substrate, the substrate was placed in the third tank of the film forming apparatus as described above. In addition, the board
- FIG. 19 is an SEM image of the obtained ITO film. There was almost no distinction between the hydrophilic portion and the water repellent portion, and a metal oxide film was formed on the entire substrate. This is probably because the dispersion containing metal oxide fine particles adhering to the water repellent portion evaporated without being water repellent. As a result, patterning on the line as seen in Example 6 was not obtained.
- a suitable metal oxide film can be obtained regardless of whether the metal oxide fine particles are ITO or GZO. It was. Moreover, a suitable metal oxide film could be obtained regardless of whether the dispersion medium was water or IPA.
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Abstract
Description
まず、基板10を準備する。基板10は、一般に用いられる基板材料を用いることができる。例えば、ガラス、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、ポリエーテルスルホン(PES)、ポリエーテルイミド、ポリエーテルエーテルケトン、ポリフェニレンスルフィド、ポリアリレート、ポリイミド、ポリカーボネート(PC)、セルローストリアセテート(TAC)、セルロースアセテートプロピオネート(CAP)等を用いることができる。
次に、基板10に対して微粒子を含む分散液からなるミストを噴霧することにより、金属酸化物膜2の成膜を行う。
説明を図1に戻す。その後、金属酸化物膜2が形成された基板10は、乾燥のため加熱される。上述の例と同様に、この際の加熱温度は基板10の軟化点より低い温度下であることが望ましい。加熱は、30Pa程度の低真空で行ってもよいし、Arガス雰囲気下で行ってもよい。熱状況については、成膜の状況等によって適宜使い分ける。なお、本工程では、必ずしも加熱により乾燥を行わなくともよい。例えば常温下に所定時間基板10を設置することにより乾燥を行ってもよい。
次に、本実施形態の変形例について説明する。
まず、基板10に対してUVを照射する。UV照射は、基板10上の不純物を除去する目的で行われるものである。なお、第1の工程は省略してもよい。
次に、基板10上にレジスト11を塗布する。レジスト11はフォトレジストに用いられる一般的な感光性材料であって、塗布には公知の塗布方法、例えばスピンコート法、ディップコート法、スプレー法等の塗布方法を用いることができる。
次に、基板10を選択的に露光する。具体的には、予め所望のパターンを施したフォトマスクを用いて、基板10上のレジスト11の一部を選択的に露光する。その後基板10を現像することで、所望の形状にパターニングされたレジスト11を得る。なお、ここでは便宜上、基板10のx方向(図3の左右方向)について選択的にマスキングしたフォトマスクを用いて露光するものとして説明する。
次に、基板10上に撥水膜3を形成する。撥水膜3にはフッ素系撥水剤等、既存の材料を用いる。例えば撥水膜3には、3MTMNоvecTMEGC-1720(住友スリーエム株式会社製)を用いることができる。撥水膜3の成膜方法については、上述のレジスト11の塗布と同様、既存の成膜方法を用いて成膜を行う。
次に、基板10上のレジスト11を剥離する。レジスト11の剥離については、既存の剥離液、例えばアセトン等を用いて行う。レジスト11を剥離することで、レジスト11上に形成された撥水膜も併せて剥離される。これにより、所望のパターンを形成する撥水膜3を得ることができる。
次に、基板10に対して金属酸化物微粒子を含む分散液をミスト化させて噴霧し、金属酸化物膜2を成膜する。具体的には、図2に示す成膜装置を用い、ミストを噴霧することにより成膜を行う。基板10には選択的に撥水膜3が形成されているため、液化した分散液は基板10上撥水膜3が形成されていない部分、つまり親水部分に付着し、選択的に金属酸化物膜2が形成される。なお、一時的に撥水部分に付着した分散液は基板10の傾きにより撥水部分を流れ落ち、隣接する親水部分に付着するか、基板10を流れ落ちて第3槽の底部に蓄積する。基板10に対し形成された金属酸化物膜2は、その後加熱乾燥される。
次に、基板10に対して絶縁膜4を形成する。なお、絶縁膜4を形成する前に、基板に対してUV照射を行うことができる。撥水膜3に対してUV照射を行うことで、撥水性が低下して絶縁膜4の形成を助けるためである。しかしながら、有機材料等、粘度の高い材料を用いて絶縁膜4を形成する場合等には、撥水膜3の撥水性の影響を考慮する必要がないため、UVを照射しなくてもよい。絶縁膜4の材料等を考慮して、必要に応じてUV照射を行った後、絶縁膜4を基板10上に形成する。
次に、基板10に対してUVを照射する。UVを照射するのは、絶縁膜4上に2層目の金属酸化物膜を形成し易くするためである。
次に、基板10に対してレジスト11を塗布する。レジスト11の塗布については、第2の工程と同様の手順で行われる。
次に、基板10を選択的に露光し、現像する。第3の工程では、基板10のx方向について選択的にマスキングしたフォトマスクを用いて露光を行ったが、本工程では基板10のy方向(図4の左右方向に直交する方向)について選択的にマスキングしたフォトマスクを用いて露光を行うものとして説明する。露光及び現像については、第3の工程と同様の手順で行われる。
次に、基板10に対して撥水膜3を塗布する。その後、基板10に残存したレジスト11を、レジスト11に形成された撥水膜3ごと剥離する。第11の工程及び第12の工程は、第4の工程及び第5の工程と同様の手順で行われる。
次に、基板10に対して2層目の金属酸化物膜2を形成する。金属酸化物膜2の成膜については、第6の工程と同様、図2に示す成膜装置を用いる。その後、金属酸化物膜2は乾燥される。なお、本図では2層目は基板10のy方向について選択的に金属酸化物膜2が形成されているため、基板10の断面図では基板10の全体にわたって2層目の金属酸化物膜2が形成されている記載となっている。
次に、基板10に対して絶縁膜4を形成する。絶縁膜4は、第13の工程で成膜を行った金属酸化物膜2の上部に形成される。絶縁膜4の形成については、第7の工程と同様の成膜方法で、同様の材料を用いて行う。
まず、フィルム20が洗浄される。洗浄方法には超音波洗浄等の一般的な方法が用いられる。
次に、フィルム20に対してUVを照射する。上述したように、UVの照射には一般的なUV照射装置を用いるが、200nm以下の波長の紫外線を照射することが望ましい。
次に、フィルム20に対して金属酸化物微粒子を分散させた分散液から発生させたミストを噴霧する。工程3で用いられる成膜装置は、図2において説明した成膜装置である。なお、上述したように、成膜装置ではフィルム20の軟化点よりも低い温度で金属酸化物膜が成膜される。本工程により、金属酸化物膜が付着したフィルム20を得ることができる。
次に、フィルム20を加熱し、工程3でフィルム20に付着させた金属酸化物膜を乾燥させる。なお、前述したように、加熱に用いる温度はフィルム20の軟化点を下回る。
次に、フィルム20を徐々に冷却させる。本工程では、冷却装置を用いてフィルム20を冷却してもよい。
本製造装置では、生成された金属酸化物膜上に2層目の金属酸化物膜を成膜する。そのため、本工程ではフィルム20に対してUV照射を行い、不純物を除去し、親水性を向上させる。なお、金属酸化物膜の成膜を1層で終了する場合は、本工程以降を省略する。
次に、フィルム20に対してミストを噴霧する。本工程では、工程3と同様に、図2に示す成膜装置を用いてフィルム20に対して金属酸化物膜を形成する。本工程により、工程3で形成された1層目の金属酸化物膜上に、2層目の金属酸化物膜が成膜される。
次に、フィルム20を加熱し、工程8でフィルム20に付着させた金属酸化物膜を乾燥させる。
次に、フィルム20を徐々に冷却させる。
まず、ITO微粒子を含む水分散液(NanoTek Slurry:シーアイ化成製)を準備した。ITO微粒子の粒子径は10~50nm、平均粒子径が30nmであった。以下の他の実施例に用いたITO微粒子の材料及び粒子径は、本実施例と同様である。また、分散液中の金属酸化物微粒子の濃度は15wt.%であった。準備した分散液を上述の成膜装置の第1槽に入れ、超音波振動子(本多電子製)により2.4MHzの電圧を印加してミストを発生させた。第1槽に空気を流し込むことにより、得られたミストを第2槽の基板近傍まで搬送した。なお、本実施例で用いた成膜装置は、ミストトラップである第2槽を省略したものである。そのため、基板に対するミストの噴霧は第2槽で行った。なお、基板としてソーダライムガラス基板を用いた。
ITO微粒子を含む水分散液を、ミストトラップを有しない上述の成膜装置の第1槽に入れ、超音波振動子(本多電子製)により2.4MHzの電圧を印加してミストを発生させた。第1槽に空気を流し込むことにより、得られたミストを第2槽の基板近傍まで搬送した。なお、基板としてソーダライムガラス基板を用いた。
ITO微粒子を含む水分散液を、スピンコートにて500rpmで基板10上に塗布した。塗布は室温下で行われた。塗布後、30Pa程度の低真空にて200℃の温度下で10分程度の加熱乾燥を行った。その後膜表面にUV(254nm、185nm混合)を照射した。続けて、スピンコートにて500rpmで基板上にITO微粒子を含む水分散液を室温下で塗布した。塗布後、30Pa程度の低真空にて200℃の温度下で10分程度の加熱乾燥を行った。なお、基板としてソーダライムガラス基板を用いた。
まず、GZO微粒子を含む水分散液(NanoTek Slurry:シーアイ化成製)を準備した。GZO微粒子の粒子径は10~50nm、平均粒子径が30nmであった。以下の他の実施例に用いたGZO微粒子の材料及び粒子径は、本実施例と同様である。また、分散液中の金属酸化物微粒子の濃度は15wt.%であった。
まず、GZO微粒子を含むIPA分散液(NanoTek Slurry:シーアイ化成製)を準備した。GZOの粒径及び金属酸化物粒子の濃度は、実施例3と同様である。準備した分散液を上述のミストトラップのない成膜装置の第1槽に入れ、超音波振動子(本多電子製)により2.4MHzの電圧を印加してミストを発生させた。第1槽に空気を流し込むことにより、得られたミストを第2槽の基板近傍まで搬送した。
実施例3と同様に、GZO微粒子を含む水分散液(NanoTek Slurry:シーアイ化成製)を準備した。準備した分散液を上述のミストトラップのない成膜装置の第1槽に入れ、超音波振動子(本多電子製)により2.4MHzの電圧を印加してミストを発生させた。第1槽に空気を流し込むことにより、得られたミストを第2槽の基板近傍まで搬送した。
スピンコーターを用いて、基板上に均一にレジストを塗布し、i線による露光を行い、ライン&スペースが100μmであるパターンを形成した。その後、ディップコーターを用いて撥水剤として3MTMNоvecTMEGC-1720(住友スリーエム株式会社製)を基板に塗布し、レジスト液を剥離することで所望の撥水パターンが形成された基板を得た。なお、基板としてPET基板を用いた。
スピンコーターを用いて、基板上に均一にレジストを塗布し、i線による露光を行い、ライン&スペースが100μmであるパターンを形成した。その後、ディップコーターを用いて撥水剤として3MTMNоvecTMEGC-1720(住友スリーエム株式会社製)を基板に塗布し、レジスト液を剥離することで所望の撥水パターンが形成された基板を得た。なお、基板としてPET基板を用いた。
スピンコーターを用いて、基板上に均一にレジストを塗布し、i線による露光を行い、ライン&スペースが100μmであるパターンを形成した。その後、ディップコーターを用いて撥水剤として3MTMNоvecTMEGC-1720(住友スリーエム株式会社製)を基板に塗布し、レジスト液を剥離することで所望の撥水パターンが形成された基板を得た。なお、基板としてPET基板を用いた。
スピンコーターを用いて、基板上に均一にレジストを塗布し、i線による露光を行い、ライン&スペースが100μmであるパターンを形成した。その後、ディップコーターを用いて撥水剤として3MTMNоvecTMEGC-1720(住友スリーエム株式会社製)を基板に塗布し、レジスト液を剥離することで所望の撥水パターンが形成された基板を得た。なお、基板としてPET基板を用いた。
Claims (13)
- 微粒子を含む分散液をミスト化するミスト化工程と、
ミスト化された前記分散液を基板に供給する供給工程と、
前記基板上に供給された前記分散液を乾燥させる乾燥工程と、
を有することを特徴とする薄膜の製造方法。 - 請求項1に記載の薄膜の製造方法であって、
前記ミスト化された分散液に含まれる微粒子の粒径が100nm以下であることを特徴とする薄膜の製造方法。 - 請求項1又は2に記載の薄膜の製造方法であって、
前記基板は、樹脂を含み、可撓性を有することを特徴とする薄膜の製造方法。 - 請求項1から3のいずれか一項に記載の薄膜の製造方法であって、
前記乾燥工程は、前記基板の軟化点より低い温度下で行われることを特徴とする薄膜の製造方法。 - 請求項4に記載の薄膜の製造方法であって、
前記乾燥工程は、10℃以上40℃以下の温度下で行われることを特徴とする薄膜の製造方法。 - 請求項1から5のいずれか一項に記載の薄膜の製造方法であって、
前記基板上に、親水部と撥水部からなるパターンを形成する親撥水パターン形成工程を備え、
前記親撥水パターン形成工程により前記親撥水パターンが形成された基板に対して前記供給工程を行うことを特徴とする薄膜の製造方法。 - 請求項1から6のいずれか一項に記載の薄膜の製造方法であって、
前記乾燥工程の後に前記基板に対して紫外線を照射する紫外線照射工程を備え、
前記紫外線照射工程により紫外線が照射された前記基板に対して再度前記供給工程を行うことを特徴とする薄膜の製造方法。 - 請求項7に記載の薄膜の製造方法であって、
前記供給工程において、前記紫外線照射工程前に供給される前記ミストに含まれる前記微粒子と、前記紫外線照射工程後に供給される前記ミストに含まれる前記微粒子とは異なることを特徴とする薄膜の製造方法。 - 請求項7又は8に記載の薄膜の製造方法であって、
前記紫外線照射工程で照射する紫外線は、少なくとも200nm以下の波長を含むことを特徴とする薄膜の製造方法。 - 請求項1から9のいずれか一項に記載の薄膜の製造方法であって、
前記供給工程において、前記基板が水平面に対して傾斜していることを特徴とする薄膜の製造方法。 - 請求項1から10のいずれか一項に記載の薄膜の製造方法であって、
前記供給工程において、前記基板が前記供給の方向に直交する面に対して傾斜していることを特徴とする薄膜の製造方法。 - 請求項1から11のいずれか一項に記載の薄膜の製造方法であって、
前記微粒子は、インジウム、亜鉛、錫、及びチタンのいずれかを含む金属酸化物微粒子であることを特徴とする薄膜の製造方法。 - 請求項12に記載の薄膜の製造方法により製造された透明導電膜。
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US20160221031A1 (en) | 2016-08-04 |
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