WO2015166723A1 - 透明導電性フィルム - Google Patents
透明導電性フィルム Download PDFInfo
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- WO2015166723A1 WO2015166723A1 PCT/JP2015/057212 JP2015057212W WO2015166723A1 WO 2015166723 A1 WO2015166723 A1 WO 2015166723A1 JP 2015057212 W JP2015057212 W JP 2015057212W WO 2015166723 A1 WO2015166723 A1 WO 2015166723A1
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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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- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
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- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/08—Oxides
- C23C14/086—Oxides of zinc, germanium, cadmium, indium, tin, thallium or bismuth
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- 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
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/10—Glass or silica
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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
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/305—Polyamides or polyesteramides
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- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
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- H01B3/42—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes polyesters; polyethers; polyacetals
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/442—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from aromatic vinyl compounds
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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/447—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from acrylic compounds
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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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- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/02—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
- H01B3/10—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances metallic oxides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
- Y10T428/24975—No layer or component greater than 5 mils thick
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
Definitions
- the present invention relates to a transparent conductive film, and more particularly to a transparent conductive film used for a touch panel film or the like.
- an image display device includes a film for a touch panel on which a transparent wiring layer made of indium tin composite oxide (ITO) or the like is formed.
- a touch panel film is generally manufactured by patterning an ITO layer into a wiring pattern in a transparent conductive film in which an ITO layer or the like is laminated on a transparent substrate (see, for example, Patent Document 1).
- Patent Document 1 has a transparent base material, a high refractive index layer, a low refractive index layer, and a transparent wiring layer, and each of the low refractive index layer and the transparent wiring layer has an uneven surface and is transparent.
- a transparent conductive laminate having a haze of 0.8 to 2.0% in both a region where a wiring layer is formed and a region where a wiring layer is not formed is disclosed. In this transparent conductive laminate, the transparent wiring layer is formed so as not to stand out.
- Patent Document 1 the resistance of the ITO layer cannot be reduced.
- An object of the present invention is to provide a transparent conductive film excellent in specific resistance.
- the transparent conductive film of the present invention is disposed on one side in the thickness direction of the transparent base material, the transparent base material, on the one side in the thickness direction of the first optical adjustment layer and the first optical adjustment layer made of a resin layer.
- the inorganic layer is disposed so as to be in contact with the first optical adjustment layer, and the transparent conductive layer is disposed on one side in the thickness direction of the inorganic layer, and the thickness of the inorganic layer is 10 nm or less.
- the surface roughness of one surface in the thickness direction of the transparent conductive layer is 1.40 nm or less.
- the first optical adjustment layer has a thickness of less than 200 nm.
- the first optical adjustment layer does not substantially contain particles.
- the surface roughness of the surface on one side in the thickness direction of the inorganic layer is 0.20 nm or more and 0.70 nm or less.
- the transparent conductive film of this invention is arrange
- the refractive index of the first optical adjustment layer is lower than the refractive index of the second optical adjustment layer.
- the transparent conductive layer has a thickness of 25 nm or more and 40 nm or less.
- the specific resistance of the transparent conductive layer is 1.1 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or more and 2.5 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or less.
- the transparent conductive film of the present invention comprises a transparent substrate, a first optical adjustment layer, an inorganic layer having a thickness of 10 nm or less, and a transparent conductive layer, and the surface of one surface in the thickness direction of the transparent conductive layer. Since the roughness is 1.40 nm or less, the specific resistance of the transparent conductive layer is reduced and the specific resistance is excellent.
- FIG. 1 shows a side sectional view of one embodiment of the transparent conductive film of the present invention.
- FIG. 2 shows a side sectional view of another embodiment of the transparent conductive film of the present invention (embodiment not including the second optical adjustment layer).
- the vertical direction of the paper is the vertical direction (thickness direction, first direction)
- the upper side of the paper is the upper side (one side in the thickness direction, the first direction)
- the lower side of the paper is the lower side (thickness direction). The other side, the other side in the first direction).
- the transparent conductive film 1 has a film shape (including a sheet shape) having a predetermined thickness, extends in a predetermined direction (surface direction) orthogonal to the thickness direction, and has a flat upper surface and a flat lower surface.
- the transparent conductive film 1 is, for example, a component such as a base material for a touch panel provided in the image display device, that is, not an image display device. That is, the transparent conductive film 1 is a component for producing an image display device and the like, does not include an image display element such as an LCD module, and includes a transparent base material 2, a second optical adjustment layer 3, and a first optical device, which will be described later.
- the device comprises an adjustment layer 4, an inorganic layer 5, and a transparent conductive layer 6.
- the transparent conductive film 1 includes a transparent substrate 2, a second optical adjustment layer 3, a first optical adjustment layer 4, an inorganic layer 5, and a transparent conductive layer 6.
- a transparent substrate 2 a transparent substrate 2
- a second optical adjustment layer 3 a first optical adjustment layer 4
- an inorganic layer 5 a transparent conductive layer 6.
- the transparent substrate 2 is, for example, a polymer film having transparency.
- polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, polyethylene naphthalate,
- PET polyethylene terephthalate
- acrylic resins such as polymethacrylate
- the olefin resin such as cycloolefin polymer include polycarbonate resin, polyether sulfone resin, polyarylate resin, melamine resin, polyamide resin, polyimide resin, cellulose resin, polystyrene resin, and norbornene resin.
- These polymer films can be used alone or in combination of two or more. From the viewpoints of transparency, heat resistance, mechanical properties, and the like, a polyester resin is preferable.
- the thickness of the transparent substrate 2 is, for example, 2 ⁇ m or more, preferably 20 ⁇ m or more, for example, 200 ⁇ m or less, from the viewpoint of mechanical strength, scratch resistance, hitting characteristics when used as a touch panel substrate, and the like. Preferably, it is 150 ⁇ m or less.
- the 2nd optical adjustment layer 3 is arrange
- the second optical adjustment layer 3 is a resin layer formed from the second resin composition.
- the second resin composition contains, for example, a resin.
- the second resin composition preferably contains a resin and particles, and more preferably consists of a resin and particles.
- the resin is not particularly limited, and examples thereof include a curable resin and a thermoplastic resin (for example, a polyolefin resin), and preferably a curable resin.
- the curable resin examples include an active energy ray-curable resin that is cured by irradiation with active energy rays (specifically, ultraviolet rays, electron beams, etc.), for example, a thermosetting resin that is cured by heating, and the like.
- active energy ray curable resin is used.
- Examples of the active energy ray-curable resin include a polymer having a functional group having a polymerizable carbon-carbon double bond in the molecule.
- Examples of such a functional group include a vinyl group and a (meth) acryloyl group (methacryloyl group and / or acryloyl group).
- the active energy ray curable resin examples include a functional group-containing (meth) acrylic resin (acrylic resin and / or methacrylic resin).
- These resins can be used alone or in combination of two or more.
- the content ratio of the resin is, for example, 10% by mass or more, preferably 50% by mass or more, and, for example, 95% by mass or less, preferably 90% by mass or less with respect to the second resin composition. .
- Examples of the particles include inorganic particles and organic particles.
- Examples of the inorganic particles include silica particles, for example, metal oxide particles made of zirconium oxide, titanium oxide, and the like, for example, carbonate particles such as calcium carbonate.
- Examples of the organic particles include crosslinked acrylic resin particles.
- the particles are preferably inorganic particles, more preferably metal oxide particles, and still more preferably zirconium oxide particles (ZnO 2 ).
- the average particle diameter of the particles is, for example, 10 nm or more, preferably 20 nm or more, and for example, 500 nm or less, preferably 100 nm or less.
- the average particle diameter of the particles can be measured by a Coulter counting method using a Coulter Multisizer manufactured by Beckman Coulter.
- the refractive index of the second optical adjustment layer 3 is, for example, 1.50 or more, preferably 1.60 or more, and, for example, 1.80 or less, preferably 1.75 or less.
- the refractive index is measured by an Abbe refractometer.
- the thickness of the second optical adjustment layer 3 is, for example, 30 nm or more, preferably 50 nm or more, and, for example, 1000 nm or less, preferably 500 nm or less, from the viewpoint of visual recognition of the wiring pattern and low resistance.
- the thickness of the second optical adjustment layer 3 is measured by, for example, cross-sectional observation with a transmission electron microscope (TEM).
- TEM transmission electron microscope
- the first optical adjustment layer 4 is disposed on the upper surface of the second optical adjustment layer 3, for example. Specifically, the lower surface of the first optical adjustment layer 4 is in contact with the upper surface of the second optical adjustment layer 3.
- the first optical adjustment layer 4 is a resin layer formed from the first resin composition.
- the first resin composition contains a resin, preferably substantially made of resin, and more preferably made of resin.
- the resin is selected from, for example, the resins exemplified in the second resin composition.
- the resin is preferably a thermosetting resin.
- thermosetting resin is not particularly limited, and examples thereof include silicone resin, epoxy resin, urethane resin, polyimide resin, phenol resin, urea resin, melamine resin, and unsaturated polyester resin.
- silicone resin epoxy resin, urethane resin, polyimide resin, phenol resin, urea resin, melamine resin, and unsaturated polyester resin.
- an epoxy resin and a melamine resin are mentioned, More preferably, an epoxy resin is mentioned.
- epoxy resin examples include thermosetting epoxy resins, and specifically, for example, bisphenol type epoxy resins such as bisphenol A type, bisphenol F type, and bisphenol S type, for example, phenol novolac type, cresol novolac.
- Type novolac type epoxy resin for example, triglycidyl isocyanurate type, nitrogen-containing ring type epoxy resin such as hydantoin type, for example, naphthalene type epoxy resin, biphenyl type epoxy resin, glycidyl ether type epoxy resin, dicyclo type epoxy resin, Examples thereof include ester type epoxy resins, modified products thereof, and hydrogenated products.
- the epoxy resin can be prepared as an epoxy resin composition by blending a curing agent for a thermosetting resin or the like with the epoxy resin and the curing agent.
- the curing agent is not particularly limited, for example, as an epoxy resin curing agent, amine curing agent, amide curing agent, acid anhydride curing agent, dihydrazide curing agent, urea curing agent, imidazole curing agent, Examples include imidazoline-based curing agents.
- the blending ratio of the curing agent is, for example, 0.5 parts by mass or more, preferably 1.0 parts by mass or more, and for example, 10 parts by mass or less, preferably 9 parts by mass with respect to 100 parts by mass of the epoxy resin. It is below mass parts.
- the first resin composition (and thus the first optical adjustment layer 4) preferably does not substantially contain particles. Thereby, since the upper surface of the 1st optical adjustment layer 4 can be smoothed, the inorganic substance layer 5 and the transparent conductive layer 6 can be smoothed further, and the specific resistance of the transparent conductive layer 6 can further be reduced.
- Examples of the particles include the same particles as those described above for the second resin composition.
- the phrase “substantially not containing particles” means that the content ratio of the particles is, for example, less than 1% by mass with respect to the total solid content of the first resin composition. It means less than 5% by mass, more preferably less than 0.1% by mass, and still more preferably 0% by mass.
- the refractive index of the first optical adjustment layer 4 is different from the refractive index of the second optical adjustment layer 3.
- the difference between the refractive index of the first optical adjustment layer 4 and the refractive index of the second optical adjustment layer 3 is, for example, 0.10 or more and 0.60 or less.
- the refractive index of the first optical adjustment layer 4 is lower than the refractive index of the second optical adjustment layer 3. That is, preferably, the second optical adjustment layer 3 is a high refractive index layer, and the first optical adjustment layer 4 is a low refractive index layer having a refractive index lower than that of the high refractive index layer.
- the transparent conductive layer 6 of the transparent conductive film 1 is patterned to form a wiring pattern, a difference in reflectance and hue generated between the wiring pattern and a portion other than the wiring pattern is reduced, and the wiring pattern is visually recognized. Can be suppressed.
- the refractive index of the first optical adjustment layer 4 is, for example, less than 1.60, preferably 1.55 or less, and for example, 1.20 or more, preferably 1.30 or more. is there.
- the surface roughness of the upper surface of the first optical adjustment layer 4 is, for example, 1.5 nm or less, preferably 1.0 nm or less, and, for example, 0.1 nm or more.
- the thickness of the first optical adjustment layer 4 is, for example, less than 200 nm, preferably 100 nm or less, more preferably 50 nm or less, and for example, 5 nm or more, preferably 10 nm or more.
- the thickness of the first optical adjustment layer 4 is measured by, for example, cross-sectional observation with a transmission electron microscope (TEM).
- TEM transmission electron microscope
- the ratio of the thickness of the first optical adjustment layer 4 to the thickness of the second optical adjustment layer 3 is, for example, 0.01 from the viewpoint of suppressing visual recognition of the wiring pattern. It is above, Preferably it is 0.05 or more, for example, 1.50 or less, Preferably, it is 1.00 or less.
- the inorganic layer 5 is disposed on the upper surface of the first optical adjustment layer 4. Specifically, the lower surface of the inorganic layer 5 is in contact with the upper surface of the first optical adjustment layer 4.
- the inorganic substance constituting the inorganic layer 5 for example, NaF, Na 3 AlF 6, LiF, an alkali metal fluoride such as MgF 2, for example, CaF 2, BaF 2 alkaline earth metal fluoride, such as, Examples thereof include rare earth fluorides such as LaF 3 and CeF, and oxides such as SiO 2 and Al 2 O 3 .
- An inorganic substance can be used alone or in combination of two or more.
- an oxide is preferable, and SiO 2 is more preferable.
- the thickness of the inorganic layer 5 is 10 nm or less.
- the thickness is preferably 4 nm or less, more preferably 3 nm or less, and for example, 1 nm or more, preferably 2 nm or more.
- the inorganic layer 5 having a thickness in the above range in close contact with the upper surface of the first optical adjustment layer 4 By disposing the inorganic layer 5 having a thickness in the above range in close contact with the upper surface of the first optical adjustment layer 4, the surface roughness of the upper surface of the inorganic layer 5 is reduced, and the transparent layer disposed on the upper surface of the inorganic layer 5 is disposed.
- the lower surface and the upper surface of the conductive layer 6 can be smoothed. As a result, the specific resistance of the transparent conductive layer 6 can be reduced.
- the inorganic material constituting the inorganic layer 5 is first arranged (formed) so as to fill the concave and convex recesses (gap) of the first optical adjustment layer 4. For this reason, in the very thin inorganic substance layer 5, it is guessed that it originates in arrange
- the inorganic layer 5 is continuously formed so as to have a thickness exceeding the above upper limit, the inorganic material eventually begins to be formed such that its upper surface conforms to the shape (unevenness) of the upper surface of the first optical adjustment layer 4, and as a result. It is presumed that the top surface of the inorganic layer 5 starts to become uneven.
- the thickness of the inorganic layer 5 is measured by, for example, cross-sectional observation with a transmission electron microscope (TEM). *
- the ratio of the thickness of the inorganic layer 5 to the thickness of the optical adjustment layer (second optical adjustment layer 3 and first optical adjustment layer 4) (inorganic layer 5 / optical adjustment layer) is from the viewpoint of suppressing visual recognition of the wiring pattern and low resistance.
- it is 0.001 or more, preferably 0.005 or more, and is, for example, 0.30 or less, preferably 0.25 or less.
- the ratio of the thickness of the inorganic layer 5 to the thickness of the first optical adjustment layer 4 is, for example, 0.02 or more from the viewpoint of visual recognition of the wiring pattern and low resistance. , Preferably 0.05 or more, and for example, 2.00 or less, preferably 1.00 or less.
- the surface roughness of the upper surface of the inorganic layer 5 is, for example, 0.70 nm or less, preferably 0.60 nm or less, more preferably 0.50 nm or less, and, for example, 0.20 nm or more.
- the transparent conductive layer 6 can be further smoothed and the specific resistance of the transparent conductive layer 6 can be reduced.
- the surface roughness of the inorganic layer 5 is set to be equal to or higher than the above lower limit, cracks in the transparent conductive layer 6 that occur during heating or humidification heat treatment can be suppressed.
- the surface roughness is measured by an atomic force microscope.
- the transparent conductive layer 6 is disposed on the upper surface of the inorganic layer 5. Specifically, the lower surface of the transparent conductive layer 6 is in contact with the upper surface of the inorganic layer 5.
- the material of the transparent conductive layer 6 is, for example, at least one selected from the group consisting of In, Sn, Zn, Ga, Sb, Ti, Si, Zr, Mg, Al, Au, Ag, Cu, Pd, and W. And metal oxides containing these metals. If necessary, the metal oxide may be further doped with a metal atom shown in the above group.
- the material of the transparent conductive layer 6 is preferably indium tin composite oxide (ITO), antimony tin composite oxide (ATO), and more preferably ITO.
- the content of tin oxide (SnO2) is, for example, 0.5% by mass or more, preferably 3% by mass with respect to the total amount of tin oxide and indium oxide (In2O3). %, For example, 15% by mass or less, preferably 13% by mass or less.
- ITO in this specification may be a composite oxide containing at least indium (In) and tin (Sn), and may contain additional components other than these.
- additional component include metal elements other than In and Sn. Specifically, Zn, Ga, Sb, Ti, Si, Zr, Mg, Al, Au, Ag, Cu, Pd, W, Fe , Pb, Ni, Nb, Cr, Ga and the like.
- the thickness of the transparent conductive layer 6 is, for example, 15 nm or more, preferably 20 nm or more, more preferably 25 nm or more, and, for example, 50 nm or less, preferably 40 nm or less, more preferably 35 nm or less.
- the transparent conductive layer 6 such as an ITO layer can be crystallized more uniformly during the heat treatment.
- the thickness of the transparent conductive layer 6 is set to be equal to or less than the above upper limit, an increase in specific resistance due to an increase in surface roughness on the upper surface of the transparent conductive layer 6 can be suppressed, and a transparent conductive layer such as an ITO layer at room temperature. 6 natural crystallization can be suppressed.
- the thickness of the transparent conductive layer 6 is calculated, for example, by measuring the X-ray reflectivity with a powder X-ray diffractometer.
- the ratio of the thickness of the transparent conductive layer 6 to the thickness of the inorganic layer 5 (transparent conductive layer 6 / inorganic layer 5) is, for example, 2.0 or more from the viewpoint of suppressing visual recognition of the wiring pattern and low resistance, For example, it is 30 or less, preferably 10 or less, more preferably 9 or less.
- the transparent conductive layer 6 may be crystalline or amorphous, or may be a mixture of crystalline and amorphous.
- the transparent conductive layer 6 is preferably made of a crystalline material, more specifically, a crystalline ITO layer. Thereby, the transparency of the transparent conductive layer 6 can be improved and the specific resistance of the transparent conductive layer 6 can be further reduced.
- the surface roughness of the upper surface of the transparent conductive layer 6 is 1.40 nm or less. Preferably, it is 0.90 nm or less, More preferably, it is 0.70 nm or less, More preferably, it is less than 0.40 nm.
- the surface roughness of the transparent conductive layer 6 exceeds the above upper limit, the irregularities on the upper surface of the transparent conductive layer 6 increase, and the specific resistance of the transparent conductive layer 6 increases.
- a hard coat layer an anti-blocking layer, an easy-adhesion layer, an adhesive layer, a separator, and the like may be provided on the lower surface (surface on the other side in the thickness direction) of the transparent substrate 2 as necessary.
- the transparent conductive film 1 for example, the second optical adjustment layer 3, the first optical adjustment layer 4, the inorganic layer 5, and the transparent conductive layer 6 are provided in this order on the transparent substrate 2. Details will be described below.
- a known or commercially available transparent substrate 2 is prepared.
- the transparent substrate 2 and the second optical adjustment layer 3 for example, sputtering, corona discharge, flame, ultraviolet irradiation, electron beam irradiation, chemical conversion are performed on the surface of the transparent substrate 2 as necessary. Etching treatment such as oxidation and undercoating treatment can be performed. Moreover, the transparent base material 2 can be dust-removed and cleaned by solvent cleaning, ultrasonic cleaning, or the like.
- the second optical adjustment layer 3 is formed on the upper surface of the transparent substrate 2 by wet-coating the second resin composition on the transparent substrate 2.
- a second diluted solution obtained by diluting the second resin composition with a solvent is prepared, and then the second diluted solution is applied to the upper surface of the transparent substrate 2 and the second diluted solution is dried.
- an organic solvent for example, an organic solvent, an aqueous solvent (specifically water) etc. are mentioned, Preferably an organic solvent is mentioned.
- the organic solvent include alcohol compounds such as methanol, ethanol, and isopropyl alcohol; ketone compounds such as acetone, methyl ethyl ketone, and methyl isobutyl ketone (MIBK); ester compounds such as ethyl acetate and butyl acetate; And aromatic compounds such as xylene.
- a ketone compound is used. Solvents can be used alone or in combination of two or more.
- the solid content concentration in the diluent is, for example, 0.5% by mass or more and 5.0% by mass or less.
- Examples of the coating method include a fountain coating method, a die coating method, a spin coating method, a spray coating method, a gravure coating method, a roll coating method, and a bar coating method.
- the drying temperature is, for example, 60 ° C. or higher, preferably 80 ° C. or higher, for example, 250 ° C. or lower, preferably 200 ° C. or lower.
- the drying time is, for example, 1.0 minute or more, preferably 2.0 minutes or more, for example, 1.0 hour or less, preferably 0.5 hour or less.
- the second resin composition is formed into a film on the upper surface of the transparent substrate 2 by the application and drying described above.
- the active energy ray curable resin is cured by irradiating the active energy ray after drying the second diluted solution.
- thermosetting resin when a thermosetting resin is contained as the resin of the second resin composition, the thermosetting resin can be thermoset together with the drying of the solvent by this drying step.
- the first optical adjustment layer 4 is formed on the upper surface of the second optical adjustment layer 3 by, for example, wet coating the first resin composition on the second optical adjustment layer 3.
- a first dilution is prepared by diluting the first resin composition with a solvent, and then the first dilution is applied to the upper surface of the second optical adjustment layer 3 and the first dilution is dried. To do.
- Examples of the solvent, the dilution method, the coating method, and the drying method are the same as the solvent, the coating method, and the like exemplified in the second dilution liquid of the second resin composition.
- thermosetting resin when a thermosetting resin is contained as the resin of the first resin composition, the thermosetting resin can be thermoset together with the drying of the solvent by this drying step.
- the active energy ray-curable resin when the resin of the first resin composition contains an active energy ray-curable resin, the active energy ray-curable resin can be cured by irradiating the active energy ray after drying the first diluted solution. it can.
- the inorganic layer 5 is formed on the upper surface of the first optical adjustment layer 4 by a dry method.
- Examples of the dry method include a vacuum deposition method, a sputtering method, and an ion plating method.
- a sputtering method is used.
- a magnetron sputtering method can be mentioned.
- examples of the target material include the above-described inorganic materials constituting the inorganic material layer 5, and Si is preferable.
- Examples of the sputtering gas include an inert gas such as Ar.
- the inorganic layer 5 contains an oxide
- a reactive gas such as oxygen gas can be used in combination as necessary.
- the flow rate ratio of the reactive gas is not particularly limited, but is, for example, 0.1 flow rate% or more and 40 flow rate% or less with respect to the total flow rate ratio of the sputtering gas and the reactive gas.
- the discharge atmospheric pressure at the time of sputtering is, for example, 1 Pa or less, preferably 0.1 Pa or more and 0.7 Pa or less, from the viewpoints of suppressing a decrease in sputtering rate, discharge stability, and the like.
- the power source used for the sputtering method may be, for example, either a DC power source or an RF power source, or a combination thereof.
- the strength of the horizontal magnetic field on the surface of the target material is, for example, 20 mT or more, preferably 50 mT or more, and more preferably 70 mT or more, from the viewpoints of film formation speed, suppression of inert gas (Ar atoms, etc.) incorporation into the inorganic layer, and the like. It is.
- degassing treatment may be performed before the formation of the inorganic layer 5. Thereby, the impurity gas emitted from the transparent substrate 2 such as a polymer film can be removed.
- the transparent substrate 2 on which the second optical adjustment layer 3 and the first optical adjustment layer 4 are formed is left under vacuum.
- the pressure in vacuum is, for example, 1 ⁇ 10 ⁇ 1 Pa or less, preferably 1 ⁇ 10 ⁇ 3 Pa or less.
- the transparent conductive layer 6 is formed on the top surface of the inorganic layer 5.
- the formation of the transparent conductive layer 6 includes the dry method described above, and preferably includes a sputtering method. In the formation of the transparent conductive layer 6, a magnetron sputtering method is particularly preferable.
- examples of the target material include the above-described metal oxides constituting the transparent conductive layer 6, and preferably ITO.
- the tin oxide concentration of ITO is, for example, 0.5% by mass or more, preferably 3% by mass or more, and, for example, 15% by mass or less, preferably from the viewpoint of durability and crystallization of the ITO layer. 13 mass% or less.
- the sputtering gas examples include an inert gas such as Ar.
- reactive gas such as oxygen gas, can be used together as needed.
- the flow rate ratio of the reactive gas is not particularly limited, but is, for example, 0.1 flow% or more and 5 flow% or less with respect to the total flow ratio of the sputtering gas and the reactive gas.
- the discharge atmospheric pressure at the time of sputtering is, for example, 1 Pa or less, preferably 0.1 Pa or more and 0.7 Pa or less, from the viewpoints of suppressing a decrease in sputtering rate, discharge stability, and the like.
- the power source used for the sputtering method may be, for example, either a DC power source or an RF power source, or a combination thereof.
- the strength of the horizontal magnetic field on the surface of the target material is, for example, 20 mT or more, preferably 50 mT or more, and more preferably 70 mT from the viewpoints of film formation speed, suppression of incorporation of an inert gas (such as Ar atoms) into the transparent conductive layer, and the like. That's it.
- an inert gas such as Ar atoms
- the transparent conductive film 1 is heated in the atmosphere.
- the heat treatment can be performed using, for example, an infrared heater or an oven.
- the heating temperature is, for example, 100 ° C. or higher, preferably 120 ° C. or higher, and for example, 200 ° C. or lower, preferably 160 ° C. or lower.
- the heating time is appropriately determined according to the heating temperature, and is, for example, 10 minutes or more, preferably 30 minutes or more, and for example, 5 hours or less, preferably 3 hours or less.
- the transparent conductive film 1 provided with the crystallized transparent conductive layer 6 is obtained.
- the specific resistance of the transparent conductive layer 6 in the transparent conductive film 1 thus obtained is, for example, 1.1 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or more, preferably 1.2 ⁇ 10 ⁇ 4 ⁇ ⁇ cm or more.
- the specific resistance is calculated from the measured surface resistance and the thickness of the transparent conductive layer 6 by measuring the surface resistance of the transparent conductive layer 6 by the four-terminal method.
- the total thickness of the transparent conductive film 1 is, for example, 2 ⁇ m or more, preferably 20 ⁇ m or more, and for example, 200 ⁇ m or less, preferably 150 ⁇ m or less.
- the transparent conductive layer 6 may be formed in a wiring pattern such as a stripe shape by known etching before or after the crystal conversion treatment.
- the second optical adjustment layer 3, the first optical adjustment layer 4, the inorganic layer 5, and the upper surface of the transparent base material 2 are conveyed on the upper surface of the transparent base material 2 while being conveyed in a roll-to-roll manner.
- the transparent conductive layer 6 may be formed in order, or a part or all of these layers may be formed by a batch method.
- this transparent conductive film 1 is equipped with the transparent base material 2, the 2nd optical adjustment layer 3, the 1st optical adjustment layer 4, the inorganic substance layer 5, and the transparent conductive layer 6 in this order. Therefore, it is possible to suppress the impurity gas generated from the transparent substrate 2 (for example, generated during crystal conversion) from reaching and entering the transparent conductive layer 6.
- the thickness of the inorganic layer 5 is 10 nm or less, the unevenness generated in the first optical adjustment layer 4 is smoothed, and the surface roughness of the upper surface of the inorganic layer 5 and the lower surface of the transparent conductive layer 6 is reduced. Yes.
- the surface roughness of the upper surface of the transparent conductive layer 6 is 1.40 nm or less.
- this transparent conductive film 1 the specific resistance of the transparent conductive layer 6 is reduced. Therefore, according to the transparent conductive film 1, even when the transparent conductive film 1 is enlarged or thinned, it can have good conductive characteristics. It is possible to suppress deterioration of various functions such as.
- the transparent conductive film 1 can be used for various applications, but is particularly preferably used for a touch panel substrate.
- Examples of the touch panel format include various systems such as an optical system, an ultrasonic system, a capacitive system, and a resistive film system, and the touch panel is particularly preferably used for a capacitive touch panel.
- the transparent conductive film 1 includes a transparent substrate 2, a second optical adjustment layer 3, a first optical adjustment layer 4, an inorganic layer 5, and a transparent conductive layer 6.
- the transparent conductive film 1 can also be composed of a transparent substrate 2, a first optical adjustment layer 4, an inorganic layer 5, and a transparent conductive layer 6.
- the transparent base material 2 the first optical adjustment layer 4 disposed on the transparent base material 2, and the inorganic layer disposed on the first optical adjustment layer 4. 5 and the transparent conductive layer 6 disposed on the inorganic layer 5, and the second optical adjustment layer 3 is not provided.
- the first optical adjustment layer 4 is in contact with the upper surface of the second optical adjustment layer 3, but the present invention is not limited to this.
- the first optical adjustment layer 4 may not be brought into contact with the upper surface of the second optical adjustment layer 3, and other layers may be interposed therebetween.
- the second optical adjustment layer 3 is brought into contact with the upper surface of the transparent substrate 2, but the present invention is not limited to this.
- the second optical adjustment layer 3 may not be brought into contact with the upper surface of the transparent substrate 2 and another layer may be interposed therebetween.
- the transparent conductive film 1 of FIG. 1 is preferable.
- Example 1 Transparent substrate
- a polyethylene terephthalate (PET) film manufactured by Mitsubishi Plastics, trade name “Diafoil”, thickness 50 ⁇ m was used.
- Second optical adjustment layer An ultraviolet curable resin composition (second resin composition) composed of an ultraviolet curable acrylic resin and zirconium oxide (ZnO 2 ) particles (average particle size 20 nm) is methylated so that the solid content concentration is 5% by mass. Diluted with isobutyl ketone (MIBK) to prepare a second diluted solution of the ultraviolet curable resin composition. Subsequently, the 2nd dilution liquid was apply
- MIBK isobutyl ketone
- thermosetting resin composition composed of 100 parts by mass of a thermosetting epoxy resin and 1 part by mass of a curing agent for thermosetting resin (curing agent for epoxy resin) has a solid content concentration of 0.00.
- the thermosetting resin composition was diluted with methyl isobutyl ketone (MIBK) so that it might become 8 mass%, and the 1st dilution liquid of the thermosetting resin composition was prepared. Subsequently, the 1st dilution liquid was apply
- MIBK methyl isobutyl ketone
- an optical adjustment layer-formed PET film including a first optical adjustment layer, a second optical adjustment layer, and a PET film was obtained.
- the optical adjustment layer-formed PET film obtained above was mounted on a vacuum sputtering apparatus, and wound up while closely contacting and running on a heated film-forming roll.
- the vacuum degree of the atmosphere was set to 1 ⁇ 10 ⁇ 4 Pa by an exhaust system equipped with a cryocoil and a turbo molecular pump while the film was running.
- an SiO 2 layer was formed as an inorganic layer on the top surface of the first optical adjustment layer of the degassed optical adjustment layer-formed PET film by DC magnetron sputtering.
- Si was used as a target material, a reduced pressure atmosphere (0.2 Pa) into which Ar and O 2 (O 2 flow rate ratio 30%) were introduced, and the horizontal magnetic field was adjusted to 100 mT.
- the formed SiO 2 layer had a thickness of 1 nm.
- ITO layer While maintaining the vacuum, indium tin composite oxidation is performed on the upper surface of the SiO 2 layer of the film (SiO 2 layer / first optical adjustment layer / second optical adjustment layer / PET film) obtained by DC magnetron sputtering.
- An object (ITO) layer was formed.
- ITO having a tin oxide concentration of 10% by mass is used as a target material, a reduced pressure atmosphere (0.4 Pa) into which Ar and O 2 (O 2 flow rate ratio 0.5%) are introduced, and a horizontal magnetic field is set to 100 mT. Adjusted.
- the formed ITO layer was amorphous and had a thickness of 26 nm.
- the film on which the amorphous ITO layer obtained above was formed was taken out from the sputtering apparatus and heat-treated in an oven at 150 ° C. for 120 minutes. This produced the transparent conductive film of Example 1 in which the crystalline ITO layer (thickness 26 nm) was formed as the transparent conductive layer (see FIG. 1).
- Example 2 A transparent conductive film was produced in the same manner as in Example 1 except that the thickness of the inorganic layer (SiO 2 layer) was 2 nm.
- Example 3 A transparent conductive film was produced in the same manner as in Example 1 except that the thickness of the inorganic layer (SiO 2 layer) was 3 nm.
- Example 4 A transparent conductive film was produced in the same manner as in Example 1 except that the thickness of the inorganic layer (SiO 2 layer) was 4 nm.
- Example 5 A transparent conductive film was produced in the same manner as in Example 1 except that the thickness of the inorganic layer (SiO 2 layer) was 6 nm.
- Example 6 A transparent conductive film was produced in the same manner as in Example 1 except that the thickness of the inorganic layer (SiO 2 layer) was 9 nm.
- Example 7 A transparent conductive film was produced in the same manner as in Example 3 except that the second optical adjustment layer was not formed.
- Example 8 A transparent conductive film was produced in the same manner as in Example 7 except that the thickness of the first optical adjustment layer was 100 nm.
- Comparative Example 1 A transparent conductive film was produced in the same manner as in Example 1 except that the inorganic layer was not formed.
- Comparative Examples 2-4 A transparent conductive film was produced in the same manner as in Example 1 except that the thickness of the inorganic layer was 11 nm, 15 nm, and 20 nm, respectively.
- Comparative Example 5 A transparent conductive film was obtained in the same manner as in Comparative Example 1 except that the first optical adjustment layer was formed as described below.
- Hollow nanosilica particle-containing acrylate resin (average particle diameter of silica 45 nm, silica content 80% by mass) and methyl isobutyl ketone (MIBK) are mixed, and a particle-containing resin mixed solution having a solid content concentration of 1.5% by mass Was prepared.
- the particle-containing resin mixture was subjected to ultrasonic dispersion for 5 minutes to uniformly disperse each component.
- This dispersed particle-containing resin mixed solution on the upper surface of the second optical adjustment layer using a bar coater, drying in an oven at 80 ° C. for 1 minute, and then irradiating with UV (integrated light amount 300 mJ), A first optical adjustment layer (thickness 25 nm, particle-containing optical adjustment layer) was formed.
- Comparative Example 6 A transparent conductive film was produced in the same manner as in Example 3 except that the first optical adjustment layer was the first optical adjustment layer (thickness 25 nm, particle-containing optical adjustment layer) described in Comparative Example 5.
- Comparative Example 7 Example 3 except that an Nb 2 O 5 layer having a thickness of 20 nm was formed as the second optical adjustment layer and an Al 2 O 3 layer having a thickness of 25 nm was formed as the first optical adjustment layer by DC magnetron sputtering. A transparent conductive film was produced in the same manner.
- the measurement light (wavelength: 589.3 nm) was measured on the measurement surface under the condition of 25.0 ° C. using an Abbe refractometer manufactured by Atago Co., Ltd. ) Was made incident, and the measurement was carried out by the prescribed measurement method shown on the refractometer. The results are shown in Table 1.
- the thickness of the transparent conductive layer is measured by the X-ray reflectivity method, and the X-ray reflectivity is measured with a powder X-ray diffractometer (Rigaku Corporation, “RINT-2000”) under the following measurement conditions. Measurement was performed and the obtained measurement data was calculated by analyzing with analysis software (“GXRR3” manufactured by Rigaku Corporation).
- the analysis conditions are as follows. A two-layer model of a PET film and an ITO layer with a density of 7.1 g / cm 3 is adopted, and the least square fitting is performed with the thickness and surface roughness of the ITO layer as variables, and transparent. The thickness of the conductive layer was analyzed. The results are shown in Table 1.
- the surface resistance ( ⁇ / ⁇ ) of the transparent conductive layer was measured by a four-terminal method according to JIS K 7194 (1994).
- the specific resistance of the transparent conductive layer was calculated from the surface resistance obtained by this measurement and the thickness of the transparent conductive layer calculated above. The results are shown in Table 1.
- the transparent conductive film of the present invention can be used for various industrial products, and is suitably used for, for example, a film for a touch panel incorporated in an image display device.
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Abstract
Description
図1の実施形態では、透明導電性フィルム1は、透明基材2と、第2光学調整層3と、第1光学調整層4と、無機物層5と、透明導電層6とを備えているが、例えば、図2に示すように、透明導電性フィルム1は、透明基材2と、第1光学調整層4と、無機物層5と、透明導電層6とから構成することもできる。
(透明基材)
透明基材として、ポリエチレンテレフタレート(PET)フィルム(三菱樹脂社製、商品名「ダイアホイル」、厚み50μm)を用いた。
紫外線硬化型アクリル樹脂と、酸化ジルコニウム(ZnO2)粒子(平均粒径20nm)とからなる紫外線硬化型樹脂組成物(第2樹脂組成物)を、固形分濃度が5質量%になるようにメチルイソブチルケトン(MIBK)で希釈して、紫外線硬化型樹脂組成物の第2希釈液を調製した。次いで、第2希釈液を、PETフィルムの上面に塗布し、乾燥させて、紫外線硬化型樹脂組成物をフィルム状に形成した。次いで、紫外線硬化型樹脂組成物に紫外線を照射して硬化させた。これにより、厚み200nmの第2光学調整層をPETフィルムの上面に形成した。
熱硬化型エポキシ樹脂100質量部と熱硬化型樹脂用硬化剤(エポキシ樹脂用硬化剤)1質量部とからなる熱硬化性樹脂組成物(第1樹脂組成物)を、固形分濃度が0.8質量%となるように、メチルイソブチルケトン(MIBK)で熱硬化性樹脂組成物を希釈して、熱硬化性樹脂組成物の第1希釈液を調製した。次いで、第1希釈液を第1光学調整層の上面に塗布し、195℃で1分間、加熱乾燥および硬化させた。これにより、厚み25nmの第1光学調整層を第2光学調整層の上面に形成した。
上記で得られた光学調整層形成PETフィルムを真空スパッタ装置へ装着し、加熱した成膜ロールに密着および走行させながら巻き取った。フィルムを走行させながら、クライオコイルとターボ分子ポンプとを備えた排気システムにより、雰囲気の真空度を1×10-4Paとした。
真空を維持したまま、DCマグネトロンスパッタリング法により、脱ガス処理した光学調整層形成PETフィルムの第1光学調整層の上面に、無機物層としてSiO2層を形成した。スパッタリング法では、Siをターゲット材として用い、ArおよびO2(O2流量比30%)を導入した減圧雰囲気(0.2Pa)に設定し、水平磁場を100mTに調整した。形成されたSiO2層は、厚みが1nmであった。
真空を維持したまま、DCマグネトロンスパッタリング法により、上記で得られたフィルム(SiO2層/第1光学調整層/第2光学調整層/PETフィルム)のSiO2層の上面に、インジウムスズ複合酸化物(ITO)層を形成した。スパッタリング法では、酸化スズ濃度10質量%のITOをターゲット材として用い、ArおよびO2(O2流量比0.5%)を導入した減圧雰囲気(0.4Pa)に設定し、水平磁場を100mTに調整した。形成されたITO層は、非晶質であり、厚みが26nmであった。
次いで、上記で得られた非晶質ITO層が形成されたフィルムを、スパッタ装置内から取り出して、150℃のオーブン内で120分加熱処理した。これにより、透明導電層として結晶質ITO層(厚み26nm)が形成された実施例1の透明導電性フィルムを製造した(図1参照)。
無機物層(SiO2層)の厚みを2nmとした以外は、実施例1と同様にして透明導電性フィルムを製造した。
無機物層(SiO2層)の厚みを3nmとした以外は、実施例1と同様にして透明導電性フィルムを製造した。
無機物層(SiO2層)の厚みを4nmとした以外は、実施例1と同様にして透明導電性フィルムを製造した。
無機物層(SiO2層)の厚みを6nmとした以外は、実施例1と同様にして透明導電性フィルムを製造した。
無機物層(SiO2層)の厚みを9nmとした以外は、実施例1と同様にして透明導電性フィルムを製造した。
第2光学調整層を形成しなかった以外は、実施例3と同様にして透明導電性フィルムを製造した。
第1光学調整層の厚みを100nmとした以外は、実施例7と同様にして透明導電性フィルムを製造した。
無機物層を形成しなかった以外は、実施例1と同様にして透明導電性フィルムを製造した。
無機物層の厚みを、それぞれ、11nm、15nm、20nmとした以外は、実施例1と同様にして透明導電性フィルムを製造した。
第1光学調整層を以下に記載するように形成した以外は、比較例1と同様にして透明導電性フィルムを得た。
第1光学調整層を、上記比較例5に記載の第1光学調整層(厚み25nm、粒子含有光学調整層)とした以外は、実施例3と同様にして透明導電性フィルムを製造した。
DCマグネトロンスパッタリング法により、第2光学調整層として、厚み20nmのNb2O5層を形成し、第1光学調整層として、厚み25nmのAl2O3層を形成した以外は、実施例3と同様にして透明導電性フィルムを製造した。
透明導電性フィルムの断面を透過型電子顕微鏡(TEM)により測定することにより、無機物層、第1光学調整層および第2光学調整層の厚さを測定した。
第1光学調整層および第2光学調整層を形成した後に、それぞれ、アタゴ社製のアッベ屈折率計を用い、25.0℃の条件下、測定面に対して測定光(波長:589.3nm)を入射させるようにして、屈折計に示される規定の測定方法により測定を実施した。結果を表1に示す。
透明導電層(ITO層)の厚みは、X線反射率法を測定原理とし、以下の測定条件にて粉末X線回折装置(リガク社製、「RINT-2000」)にてX線反射率を測定し、取得した測定データを解析ソフト(リガク社製、「GXRR3」)で解析することで算出した。解析条件は以下の条件とし、PETフィルムと密度7.1g/cm3のITO層との2層モデルを採用し、ITO層の厚みと表面粗さを変数として、最小自乗フィッティングを実施し、透明導電層の厚みを解析した。結果を表1に示す。
光源: Cu-Kα線(波長:1,5418Å)、40kV、40mA
光学系: 平行ビーム光学系
発散スリット: 0.05mm
受光スリット: 0.05mm
単色化・平行化: 多層ゲーベルミラー使用
測定モード: θ/2θスキャンモード
測定範囲(2θ): 0.3~2.0°
[解析条件]
解析手法: 最小自乗フィッティング
解析範囲(2θ): 2θ=0.3~2.0°
(表面粗さの測定)
第1光学調整層、透明導電層および無機物層の表面粗さ(nm)は、原子間力顕微鏡(Digital Instruments社製、「Dimension 3100」、以下AFMとする。)を用い、常温下でTapping AFMモードにおける形状像を1μm平方で測定した。そのとき得られた形状像から装置付属のソフトのオフラインモードで自動計算される面内の算術平均粗さRaを求めた。結果を表1に示す。
透明導電層の表面抵抗(Ω/□)を、JIS K 7194(1994年)に準じて四端子法により測定した。この測定により得られた表面抵抗、および、上記で算出した透明導電層の厚みから、透明導電層の比抵抗を算出した。結果を表1に示す。
2 透明基材
3 第2光学調整層
4 第1光学調整層
5 無機物層
6 透明導電層
Claims (8)
- 透明基材と、
前記透明基材の厚み方向一方側に配置され、樹脂層からなる第1光学調整層と、
前記第1光学調整層の厚み方向一方側に、前記第1光学調整層と接触するように、配置される無機物層と、
前記無機物層の厚み方向一方側に配置される透明導電層と
を備え、
前記無機物層の厚みが、10nm以下であり、
前記透明導電層の厚み方向一方側の表面の表面粗さが、1.40nm以下であることを特徴とする、透明導電性フィルム。 - 前記第1光学調整層の厚みが、200nm未満であることを特徴とする、請求項1に記載の透明導電性フィルム。
- 前記第1光学調整層は、粒子を実質的に含有していないことを特徴とする、請求項1に記載の透明導電性フィルム。
- 前記無機物層の厚み方向一方側の表面の表面粗さが、0.20nm以上0.70nm以下であることを特徴とする、請求項1に記載の透明導電性フィルム。
- 前記透明基材の厚み方向一方側かつ前記第1光学調整層の厚み方向他方側に配置され、前記第1光学調整層の屈折率と異なる第2光学調整層をさらに備えることを特徴とする、請求項1に記載の透明導電性フィルム。
- 前記第1光学調整層の屈折率が、前記第2光学調整層の屈折率よりも低いことを特徴とする、請求項5に記載の透明導電性フィルム。
- 前記透明導電層の厚みが、25nm以上40nm以下であることを特徴とする、請求項1に記載の透明導電性フィルム。
- 前記透明導電層の比抵抗が、1.1×10-4Ω・cm以上2.5×10-4Ω・cm以下であることを特徴とする、請求項1に記載の透明導電性フィルム。
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| JP2017053038A (ja) | 2017-03-16 |
| TWI665092B (zh) | 2019-07-11 |
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| CN105659198A (zh) | 2016-06-08 |
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| TW201545898A (zh) | 2015-12-16 |
| WO2015166724A1 (ja) | 2015-11-05 |
| US10186346B2 (en) | 2019-01-22 |
| TWI665091B (zh) | 2019-07-11 |
| CN105659198B (zh) | 2019-06-18 |
| CN105452520A (zh) | 2016-03-30 |
| KR20160146638A (ko) | 2016-12-21 |
| US20170047144A1 (en) | 2017-02-16 |
| US20160155531A1 (en) | 2016-06-02 |
| JP6207633B2 (ja) | 2017-10-04 |
| CN105452520B (zh) | 2019-04-09 |
| US10002687B2 (en) | 2018-06-19 |
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