WO2014073597A1 - 導電体及びその製造方法 - Google Patents
導電体及びその製造方法 Download PDFInfo
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- WO2014073597A1 WO2014073597A1 PCT/JP2013/080089 JP2013080089W WO2014073597A1 WO 2014073597 A1 WO2014073597 A1 WO 2014073597A1 JP 2013080089 W JP2013080089 W JP 2013080089W WO 2014073597 A1 WO2014073597 A1 WO 2014073597A1
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- film
- transparent conductive
- conductive film
- buffer
- metal film
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- 239000002184 metal Substances 0.000 claims abstract description 101
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000002042 Silver nanowire Substances 0.000 claims abstract description 34
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Images
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- H—ELECTRICITY
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- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
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- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
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- H01L31/1884—Manufacture of transparent electrodes, e.g. TCO, ITO
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- H—ELECTRICITY
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K1/02—Details
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/60—Forming conductive regions or layers, e.g. electrodes
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- B82Y40/00—Manufacture or treatment of nanostructures
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K2201/0108—Transparent
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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- H05K2201/0326—Inorganic, non-metallic conductor, e.g. indium-tin oxide [ITO]
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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- H05K2201/0338—Layered conductor, e.g. layered metal substrate, layered finish layer or layered thin film adhesion layer
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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- H05K2201/0352—Differences between the conductors of different layers of a multilayer
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
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- H05K2201/10128—Display
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
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- H10K10/80—Constructional details
- H10K10/82—Electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
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Definitions
- the present invention relates to adhesion between a transparent conductive film containing silver nanowires and a metal film.
- Patent Document 1 discloses a conductor in which a silver nanowire transparent conductive film is formed on a substrate.
- silver nanowires are dispersed in a transparent conductive film (Patent Documents 1 [0053], [0054], [0103], [0104], etc.).
- the silver nanowire is hold
- the present invention is for solving the above-mentioned conventional problems, and in particular, an object of the present invention is to provide a conductor capable of improving the adhesion between a transparent conductive film and a metal film, and a method for producing the conductor.
- the conductor in the present invention is A substrate; A transparent conductive film containing silver nanowires formed on the substrate; A metal film formed so that at least a part thereof overlaps the transparent conductive film; Have A buffer that has adhesion to each of the transparent conductive film and the metal film at a portion where the transparent conductive film and the metal film overlap, and does not hinder conduction between the transparent conductive film and the metal film. It is characterized by having a film.
- the manufacturing method of the conductor in the present invention is as follows: On the transparent conductive film containing silver nanowires formed on the substrate, the transparent conductive film and the metal film to be formed in the next step have adhesion with each other and between the transparent conductive film and the metal film Forming a buffer film that does not hinder the conduction of Forming at least part of the metal film on the buffer film; It is characterized by having.
- Adhesion can be improved while maintaining good electrical conductivity between the transparent conductive film and the metal film.
- the buffer film is preferably formed of a transparent metal oxide.
- the transparent metal oxide is preferably ITO.
- the transparent conductive film it is preferable to form the transparent conductive film on the upper surface after reverse sputtering the upper surface of the transparent conductive layer. That is, it is preferable that the upper surface of the transparent conductive film is a reverse sputtering surface and the buffer film is formed on the reverse sputtering surface. Thereby, the adhesiveness between a transparent conductive film and a metal film can be improved more effectively.
- membrane is an organic substance provided with the functional group couple
- the organic substance is preferably a triazine compound having an alkoxy group and a thiol group, or an alkoxy group and an azide group.
- the triazine compound preferably has a structure represented by Chemical Formula 5 or Chemical Formula 6.
- the adhesiveness between a transparent conductive film and a metal film can be improved effectively.
- the buffer film that has adhesiveness with each of the transparent conductive film and the metal film and does not prevent conduction between the transparent conductive film and the metal film is interposed.
- adhesion can be improved while maintaining good electrical conductivity between the transparent conductive film and the metal film.
- FIGS. 1A and 1B are longitudinal sectional views of a conductor in the present embodiment
- FIG. 1C is a schematic view showing a part of the conductor in an enlarged manner.
- FIG. 2 is a process diagram (longitudinal sectional view) showing a method of manufacturing a conductor in the present embodiment.
- FIG. 3 is a process diagram (longitudinal sectional view) performed next to FIG. 2.
- FIG. 4 is a process diagram (longitudinal sectional view) performed next to FIG. 3.
- FIG. 5 is a process diagram (longitudinal sectional view) performed after FIG.
- FIG. 6 is a process diagram (longitudinal sectional view) performed subsequent to FIG.
- FIG. 1A is a longitudinal sectional view of a conductor in the present embodiment.
- 1A includes a transparent substrate 2, a transparent conductive film 3 formed on the upper surface 2a of the transparent substrate 2, a buffer film 4 formed on the transparent conductive film 3, and a buffer. And a metal film 5 formed on the film 4.
- the conductor 1 may be a film having flexibility, a plate shape or a panel shape having high rigidity.
- transparent and “translucent” refer to a state where the visible light transmittance is 50% or more (preferably 80% or more).
- the transparent conductive film 3 is patterned on the transparent substrate 2 in the shape of a transparent electrode.
- the transparent electrode film 3 may be patterned as shown in FIG. 1A and partially formed on the transparent substrate 2, or may be formed on the entire upper surface 2 a of the transparent substrate 2. . Further, at the position of the longitudinal section shown in FIG. 1 (a), each transparent conductive film 3 appears in a separated state, but is electrically connected integrally or via another conductive film at a position not shown. It can be in the form.
- the use of the conductor 1 shown in FIG. 1 (a) is not limited.
- the conductor 1 is used as a part of the input display device.
- a liquid crystal display or the like is disposed below the conductor 1, and the central portion where the metal film 5 is not disposed in the transparent conductive film 3 illustrated in FIG. Therefore, the transparent conductive film 3 in the central portion is a transparent electrode for causing a change in capacitance with an operating body such as a finger.
- the portion where the metal film 5 is superimposed on the transparent conductive film 3 on both sides in FIG. 1A is a non-display region, for example, a wiring portion electrically connected to the transparent electrode in the center portion. It is composed.
- the display panel may be arranged on the surface of the conductor 1 shown in FIG. 1A via a transparent adhesive layer (not shown). Moreover, the lower surface side of the transparent base material 2 shown to Fig.1 (a) can also be made into an input operation surface.
- the transparent substrate 2 shown in FIG. 1 (a) is formed of a film-like transparent substrate such as polyethylene terephthalate (PET), a glass substrate, or the like.
- PET polyethylene terephthalate
- the material of the transparent substrate 2 is not particularly limited.
- the transparent base material 2 was used in Fig.1 (a), a non-transparent, for example, translucent base material can also be used.
- the transparent conductive film 3 shown in FIG. 1 (a) is a transparent conductive film containing silver nanowires.
- the silver nanowire 6 is a linear structure made of silver or a silver alloy.
- the silver nanowires 6 are dispersed in the transparent resin layer 7, and each of the silver nanowires 6 is in contact with a part of the silver nanowires 6 to conduct in-plane conductivity. Keeps sex.
- the silver nanowires 6 are dispersed in the transparent resin layer 7. Dispersibility of the silver nanowire 6 is ensured by the resin layer 7.
- the material of the resin layer 7 is not particularly limited, for example, the resin layer 7 is a polyester resin, an acrylic resin, a polyurethane resin, or the like.
- a metal film 5 is formed on a transparent conductive film 3 located on both sides of the transparent base material 2 through a buffer film 4 in the transparent conductive film 3.
- the buffer film 4 is an intermediate film that has adhesiveness with each of the transparent conductive film 3 and the metal film 5 and does not prevent conduction between the transparent conductive film 3 and the metal film 5.
- the metal film 5 is a Cu film, for example.
- the buffer film 4 can particularly improve the adhesion between the metal film 5 and the transparent conductive film 3 containing silver nanowires.
- the material of the metal film 5 is not particularly limited, and Al, Ag, Au, Ni, etc. can be selected in addition to Cu.
- the buffer film 4 is provided only between the transparent conductive film 3 and the metal film 5, but the buffer film 4 is transparent so that the metal film 5 does not overlap as shown in FIG. It may be left on the upper surface of the conductive film 3.
- the portion of the buffer film 4 that does not overlap with the metal film 5 can be removed through an etching process, or the metal film 5 may overlap depending on the etching conditions such as the etching solution used.
- the part of the buffer film 4 that is not left can be left on the upper surface of the transparent conductive film 3. At this time, since the buffer film 4 is a very thin transparent film, good translucency can be secured even if the buffer film 4 is left on the transparent conductive film 3.
- the buffer film 4 is preferably a transparent metal oxide.
- an inorganic transparent conductive material such as ITO (Indium Tin Oxide), ZnO, or SnO 2 can be used, and among these, it is particularly preferable to select ITO. Thereby, the adhesiveness between the transparent conductive film 3 and the metal film 5 can be improved effectively.
- a buffer film 4 made of a transparent metal oxide (especially ITO) is formed on the upper surface 3a which is the reverse sputtering surface.
- Reverse sputtering refers to a method of modifying the surface by generating plasma near the surface of the transparent conductive film 3 in an inert gas atmosphere or the like. Reverse sputtering is performed by reversing the voltage between the target and the substrate applied by normal sputtering.
- the upper surface 3a of the transparent conductive film 3 is modified by reverse sputtering, and the adhesion between the transparent conductive film 3 and the metal film 5 through the buffer film 4 can be improved more effectively.
- the reverse sputtering the exposed amount (exposed area) of the silver nanowire 6 that is a metal is increased on the upper surface 3a of the transparent conductive film 3, or the upper surface 3a of the transparent conductive film 3 is considered to be appropriately roughened.
- the thickness of the buffer film 4 made of the transparent metal oxide (especially ITO) is preferably about 2 nm to 100 nm.
- the thickness of the buffer film 4 is preferably about 20 to 100 nm. .
- the metal film 5 is formed after reverse sputtering is performed on the upper surface 4a of the buffer film 4 (see FIG. 1C).
- the adhesiveness between the transparent conductive film 3 containing silver nanowire and the metal film 5 can be improved more effectively.
- good conductivity between the transparent conductive film 3 and the metal film 5 through the buffer film 4 can be maintained.
- the buffer film 4 may be an organic substance having a functional group bonded to each of the transparent conductive film 3 and the metal film 5.
- the film thickness of the buffer film 4 by the process described later is very thin, and the transparent conductive film 3 and the metal film 5 through the buffer film 4 are electrically connected.
- the buffer film 4 is intermittently formed on the upper surface 3 a of the transparent conductive film 3, and the transparent conductive film 3 and the metal film 5 through the buffer film 4 are electrically connected.
- the above organic substance is preferably a triazine compound having an alkoxy group and a thiol group, or an alkoxy group and an azide group.
- the triazine compound preferably has a structure represented by the following chemical formula 7 or chemical formula 8.
- the heat treatment is preferably performed at around 100 ° C. for several minutes to several tens of minutes. This heat treatment may be performed during the formation process of the buffer film 4 using the triazine compound represented by the chemical formulas 7 and 8, or after the formation process of the buffer film 4 (the metal film 5). The film may be applied before, during or after the film formation.
- FIGS. 2 to 6 are process diagrams (longitudinal sectional views) showing a method for manufacturing the conductor 1 in the present embodiment.
- the buffer film 4 is formed on the upper surface 3a of the transparent conductive film 3 containing silver nanowires formed on the transparent substrate 2 such as PET.
- the buffer film 4 has adhesion to both the transparent conductive film 3 and the metal film 5 formed in the next step, and has a function that does not hinder conduction between the transparent conductive film 3 and the metal film 5.
- the transparent conductive film 3 is formed on substantially the entire upper surface 2 a of the transparent substrate 2.
- the transparent conductive film 3 can also be partially formed on the upper surface 2a of the transparent substrate 2 from the beginning.
- a conductive base material in which a transparent conductive film 3 containing silver nanowires is formed in advance on the transparent base material 2 may be prepared, or a coating solution containing silver nanowires is applied on the transparent base material 2 and predetermined
- the transparent conductive film 3 can also be formed on the transparent substrate 2 by performing the heat treatment.
- the buffer film 4 shown in FIG. 2 is preferably formed of a transparent metal oxide. More preferably, the transparent metal oxide is made of ITO. Furthermore, after reversely sputtering the upper surface 3a of the transparent conductive film 3, the buffer film 4 made of a transparent metal oxide (especially ITO) is preferably formed on the upper surface 3a by an existing method such as sputtering. As conditions for the reverse sputtering, the pressure is controlled to about 50 to 500 mmtorr and the power is about 0.01 to 10 mW / cm 2 in an inert atmosphere such as Ar or in a vacuum atmosphere.
- the buffer film 4 can be formed of an organic material having a functional group that binds to the transparent conductive film 3 and the metal film 5 formed in the process of FIG.
- the organic substance is preferably formed of a triazine compound having an alkoxy group and a thiol group, or an alkoxy group and an azide group, and specifically, a triazine compound represented by the above chemical formula 7 or chemical formula 8.
- the formation of the buffer film 4 with an organic substance is performed through an immersion process, a cleaning process, a drying process, and the like of a solution containing the organic substance.
- the buffer film 4 is formed on the entire upper surface 3a of the transparent conductive film 3.
- the buffer film 4 may be formed only in a predetermined region of the upper surface 3a of the transparent conductive film 3 in the process of FIG.
- the metal film 5 is formed on the buffer film 4 by an existing method such as sputtering.
- the metal film 5 is formed on the entire upper surface 4a of the buffer film 4, but it can also be formed only in a predetermined region.
- the metal film 4 is preferably formed of a Cu film.
- a resist layer 8 is applied to the upper surface 5 a of the metal film 5.
- the resist layer 8 is subjected to pre-bake processing and exposure development processing to leave the resist layer 8 having the pattern shown in FIG.
- the metal film 5 not covered with the resist layer 8 is removed by etching.
- the buffer film 4 exposed by removing the metal film 5 may be removed by the etching solution at this time.
- the surface of the transparent conductive film 3 is exposed as shown in FIG. In the step of FIG. 4, the exposed buffer film 4 may not be removed by etching.
- the resist layer 8 is removed, and then the resist layer 9 is applied to the entire surface.
- the resist layer 9 is subjected to pre-bake processing and exposure development processing to leave the resist layer 9 having the pattern shown in FIG.
- the metal film 5 not covered with the resist layer 9 is removed by etching.
- the buffer film 4 exposed by removing the metal film 5 can also be removed by the etching process.
- the conductor 1 shown in FIG. 6 is completed by removing the resist layer 9.
- the metal film 5 is formed on the transparent conductive film 3 via the buffer film 4. This makes it possible to effectively improve the adhesion between the transparent conductive film 3 containing silver nanowires and the metal film 5.
- the entire metal film 5 is overlapped with the transparent conductive film 3, and the buffer film 4 is interposed in the portion where the transparent conductive film 3 and the metal film 5 overlap.
- the buffer film 4 is interposed in the overlapped part.
- each of the conductors used a common conductive base material in which a transparent conductive film containing silver nanowires was formed on a transparent base material, and a Cu film having a thickness of 150 nm was formed as a metal film.
- Comparative Example 2 As shown in Table 1, in Comparative Example 2, the surface of the transparent conductive film was subjected to surface treatment with UV-ozone, and then a metal film (Cu film) was formed. In Comparative Example 3, the surface of the transparent conductive film was subjected to excimer UV treatment, and then a metal film (Cu film) was formed. In Examples 1 and 2, the upper surface of the transparent conductive film is not reverse-sputtered.
- Example 1 As shown in Table 1, in Example 1, after a buffer film made of ITO having a thickness of 20 nm was formed on the upper surface of a transparent conductive film containing silver nanowires, a metal film (Cu film) was formed on the buffer film. A film was formed. In Example 2, a buffer film made of ITO was formed to a thickness of 100 nm on the upper surface of the transparent conductive film containing silver nanowires, and then a metal film (Cu film) was formed on the buffer film.
- a buffer film made of ITO was formed to a thickness of 100 nm on the upper surface of the transparent conductive film containing silver nanowires, and then a metal film (Cu film) was formed on the buffer film.
- Example 3 the upper surface of the transparent conductive film containing silver nanowires was reverse-sputtered, and then a buffer film made of ITO was formed on the upper surface to a thickness of 2 nm, and then the buffer A metal film (Cu film) was formed on the film.
- Example 4 the upper surface of the transparent conductive film containing silver nanowires was reverse sputtered, and then a buffer film made of ITO was formed on the upper surface with a thickness of 20 nm, and then a metal film (Cu Film).
- Example 5 the upper surface of the transparent conductive film containing silver nanowires was reverse sputtered, and then a buffer film made of ITO was formed to a thickness of 100 nm on the upper surface, and then a metal film (Cu Film).
- Example 6 the upper surface of the transparent conductive film containing silver nanowires was reverse-sputtered, and then a buffer film made of ITO was formed on the upper surface with a thickness of 20 nm. After leaving it in the air atmosphere to some extent, it was again put into a sputtering apparatus and evacuated, then the upper surface of the buffer film was reverse sputtered, and a metal film (Cu film) was formed on the buffer film.
- Example 7 a buffer film made of the triazine compound represented by Chemical Formula 7 (hereinafter referred to as TES) is formed on the upper surface of the transparent conductive film containing silver nanowires, and then a metal film ( Cu film) was formed.
- the buffer film in Example 7 was formed through each step of immersion in KOH aqueous solution (3%) — H 2 O rinse—TES / immersion in ethanol solution—H 2 O rinse—hot plate (80 ° C.) (TES treatment) ). Further, after forming the metal film, heat treatment was performed at 100 ° C. for 10 minutes.
- Example 8 a buffer film made of the triazine compound represented by Formula 8 (hereinafter referred to as P-TES) is formed on the upper surface of the transparent conductive film containing silver nanowires, and then a metal film is formed on the buffer film. A film (Cu film) was formed.
- the buffer film in Example 8 was formed through P-TES / IPA (0.1%) through the steps of dipping, dryer drying, UV irradiation, and ethanol rinsing (P-TES treatment). Further, after forming the metal film, heat treatment was performed at 100 ° C. for 10 minutes.
- ⁇ shown in Table 1 is the result when there is no peeling at all, ⁇ is the result when peeling is seen only in a part, and x is the result when peeling is seen entirely.
- Example 3 to 6 were able to obtain better adhesion than Examples 1 and 2. Therefore, it is understood that the adhesion between the transparent conductive film and the metal film can be more effectively improved by reverse sputtering the surface of the transparent conductive film and forming a buffer film made of ITO. It was. Furthermore, as in Example 6, it was found that even after the buffer film was formed and left in the atmosphere, the adhesion could be effectively improved by reverse sputtering the upper surface of the buffer layer. .
- Example 7 subjected to TES treatment and Example 8 subjected to P-TES treatment both were subjected to heat treatment, and it was found that good adhesion was obtained.
- Example 9 with TES treatment the elements and composition on the surface of the transparent conductive film were measured by XPS (X-ray photoelectron spectroscopy). The ratio was determined. The experimental results are shown in Table 2.
- Example 9 and Example 10 a small amount of Ag was detected in Comparative Example 1 where no pretreatment was performed.
- the buffer film made of an organic substance (triazine compound) was formed on the upper surface of the transparent conductive film by performing the TES process of Example 9 and the P-TES process of Example 10. These buffer films are considered to be very thin or formed intermittently.
- Example 9 the haze value, Tt value (transmittance), and sheet resistance were measured. The results are shown in Table 3 below.
- the sheet resistance was obtained by applying a silver paste to 5 mm at both ends of a 25 ⁇ 50 mm sheet, firing at 120 ° C. for 30 minutes, and then determining the bulk resistance.
- the haze value, the Tt value, and the sheet resistance were almost the same for each sample.
- the transparent conductive film was maintained while maintaining various properties of translucency and conductivity. It was found that the adhesion between the metal film and the metal film can be improved.
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Abstract
Description
基材と、
前記基材上に形成された銀ナノワイヤを含む透明導電膜と、
少なくとも一部が前記透明導電膜上に重なるように形成された金属膜と、
を有し、
前記透明導電膜と前記金属膜とが重なった部分に、前記透明導電膜及び前記金属膜のそれぞれに対し密着性を有して前記透明導電膜と前記金属膜との間の導通を妨げないバッファ膜を有することを特徴とするものである。
基材上に形成された銀ナノワイヤを含む透明導電膜上に、前記透明導電膜と次工程に形成される金属膜のそれぞれと密着性を有して前記透明導電膜と前記金属膜との間の導通を妨げないバッファ膜を形成する工程と、
前記バッファ膜上に前記金属膜の少なくとも一部を形成する工程と、
を有することを特徴とするものである。
また本発明では、前記バッファ膜に対して熱処理工程を施すことが好ましい。これにより、より効果的に透明導電膜と金属膜間の密着性を向上させることができる。
図1(a)に示す導電体1は、透明基材2と、透明基材2の上面2aに形成された透明導電膜3と、透明導電膜3上に形成されたバッファ膜4と、バッファ膜4上に形成された金属膜5とを有して構成される。
なおこの明細書において、「透明」「透光性」とは可視光線透過率が50%以上(好ましくは80%以上)の状態を指す。
また、有機物に対して熱処理が施されていることが密着性をより効果的に向上させるうえで好ましい。熱処理は、100℃前後で数分~数十分行うことが好適である。この熱処理は、上記の化学式7や化学式8に示すトリアジン化合物を用いたバッファ膜4の形成工程中に施されるものであってもよいし、あるいは、バッファ膜4の形成工程後(金属膜5の成膜前、成膜中、成膜後のいずれであってもよい)に施されるものであってもよい。
金属膜4をCu膜で形成することが好ましい。
さらにレジスト層9を除去することで図6に示す導電体1が完成する。
いずれの導電体も、透明基材上に銀ナノワイヤを含む透明導電膜が形成された共通の導電基材を使用し、さらに金属膜として膜厚が150nmのCu膜を成膜した。
なお、実施例1、2については、透明導電膜の上面を逆スパッタしていない。
2 透明基材
3 透明導電膜
4 バッファ膜
5 金属膜
6 銀ナノワイヤ
7 樹脂層
8、9 レジスト層
Claims (17)
- 基材と、
前記基材上に形成された銀ナノワイヤを含む透明導電膜と、
少なくとも一部が前記透明導電膜上に重なるように形成された金属膜と、
を有し、
前記透明導電膜と前記金属膜とが重なった部分に、前記透明導電膜及び前記金属膜のそれぞれに対し密着性を有して前記透明導電膜と前記金属膜との間の導通を妨げないバッファ膜を有することを特徴とする導電体。 - 前記バッファ膜は、透明金属酸化物で形成される請求項1記載の導電体。
- 前記透明金属酸化物は、ITOである請求項2記載の導電体。
- 前記透明導電膜の上面は逆スパッタ面であり、前記バッファ膜は前記逆スパッタ面上に形成される請求項2又は3に記載の導電体。
- 前記バッファ膜は、前記透明導電膜及び前記金属膜の夫々に結合する官能基を備えた有機物である請求項1記載の導電体。
- 前記有機物は、アルコキシ基及びチオール基、あるいはアルコキシ基及びアジ基を有するトリアジン化合物である請求項5記載の導電体。
- 前記有機物に対して熱処理が施されている請求項5ないし7のいずれか1項に記載の導電体。
- 前記金属膜は、Cuで形成される請求項1ないし8のいずれか1項に記載の導電体。
- 基材上に形成された銀ナノワイヤを含む透明導電膜上に、前記透明導電膜と次工程に形成される金属膜のそれぞれと密着性を有して前記透明導電膜と前記金属膜との間の導通を妨げないバッファ膜を形成する工程と、
前記バッファ膜上に前記金属膜の少なくとも一部を形成する工程と、
を有することを特徴とする導電体の製造方法。 - 前記バッファ膜を、透明金属酸化物で形成する請求項10記載の導電体の製造方法。
- 前記透明金属酸化物を、ITOで形成する請求項11記載の導電体の製造方法。
- 前記透明導電層の上面を逆スパッタした後、前記上面に前記透明導電膜を形成する請求項10ないし12のいずれか1項に記載の導電体の製造方法。
- 前記バッファ膜を、前記透明導電膜及び前記金属膜の夫々に結合する官能基を備えた有機物で形成する請求項10記載の導電体の製造方法。
- 前記有機物を、アルコキシ基及びチオール基、あるいはアルコキシ基及びアジ基を有するトリアジン化合物で形成する請求項14記載の導電体の製造方法。
- 前記バッファ膜に対し熱処理工程を施す請求項14ないし16のいずれか1項に記載の導電体の製造方法。
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TWI684519B (zh) * | 2018-08-20 | 2020-02-11 | 郭明智 | 複合導電材料 |
JP2021037668A (ja) * | 2019-09-02 | 2021-03-11 | 日東電工株式会社 | 透明導電性フィルム、透明導電性フィルムの製造方法および中間体 |
JP7442283B2 (ja) | 2019-09-02 | 2024-03-04 | 日東電工株式会社 | 透明導電性フィルム、透明導電性フィルムの製造方法および中間体 |
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CN104919540A (zh) | 2015-09-16 |
JP5993028B2 (ja) | 2016-09-14 |
US20180047478A1 (en) | 2018-02-15 |
CN104919540B (zh) | 2017-05-10 |
KR101714286B1 (ko) | 2017-03-08 |
JPWO2014073597A1 (ja) | 2016-09-08 |
US10886037B2 (en) | 2021-01-05 |
US20150221413A1 (en) | 2015-08-06 |
KR20150068446A (ko) | 2015-06-19 |
US10026523B2 (en) | 2018-07-17 |
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