CN112289485A - Bridge island type conductive substance film material - Google Patents
Bridge island type conductive substance film material Download PDFInfo
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- CN112289485A CN112289485A CN201910714849.8A CN201910714849A CN112289485A CN 112289485 A CN112289485 A CN 112289485A CN 201910714849 A CN201910714849 A CN 201910714849A CN 112289485 A CN112289485 A CN 112289485A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0026—Apparatus for manufacturing conducting or semi-conducting layers, e.g. deposition of metal
Abstract
The application discovers and proposes for the first time: besides ohmic conduction and capacitance conduction, the conducting layer of the conducting material film material also has inductive conduction (inductive reactance). The film material of the bridge island type conductive substance is a conductive film for overcoming the inductive reactance of the surface of the conductive film, the bridge island type physical contact (sintering) points are constructed on the conductive substances with different shapes, the control on the rheological direction of the microscopic current is realized, the high-frequency alternating inductive reactance (or reverse utilization) of the conductive ink layer is reduced, and the bridge island type conductive substance is used for various product processes and has outstanding cost performance; hot melt pressure bonding, electronic printing, compounding, photo, thermal, electronic curing, etching. The higher the frequency of the passing current, the greater the inductive reactance. The flexible conductive film has excellent application prospect in the product fields of switch electrode circuits, printed electronics, 5G and 6G ultrahigh frequency matrix circuits, mass antenna patches and the like, and realizes roll-to-roll (R2R) production of flexible conductive films and developed products thereof.
Description
Technical Field
The conductive film is a film material of bridge island type conductive substance capable of overcoming the inductive resistance of the surface of the conductive film, and is simply called as a bridge island type conductive film. It is composed of a basal membrane, a conductive substance ink layer and a necessary auxiliary functional layer; the flexible conductive film has a plurality of product process application forms such as composite, photoetching, electronic printing, anisotropy, electromagnetism, electrodes and the like, and is suitable for roll-to-roll (R2R) production of flexible conductive films and secondary products thereof. The organic, inorganic and semiconductor conductive material ink layer is formed by multi-dimensional overlapping of a nano-micron filamentous conductive material and at least one other conductive material in a flake shape (containing a triangular flake), a spherical shape, an olive shape, a granular shape (containing a cube) and the like, bridge-island physical contact (sintering) points are formed on the conductive materials in different shapes, control over the rheological direction of a microscopic current is realized, and high-frequency alternating inductive reactance (or reverse utilization) of the conductive ink layer is reduced, so that the ink layer is used for various product processes. Such as 5G, 6G antennas with bridge island structured conductive ink layers, and roll-to-roll produced small day patches thereof, and the like.
The conductive substance ink layer and the auxiliary functional layer which are designed in a bridge island mode can be dyed or bleached by physical and chemical methods such as electrons, light, heat and the like as required to recover the colorless and the transparency of the original ink layer;
a film material of a conductive substance in a bridge-island design, wherein the thickness of each conductive substance layer is less than 2 μm, and the content of the conductive substance is 80-100%;
when the film material of the conducting material with the bridge island type design is applied as an electronic printing product process, the content of the conducting material of each conducting material layer is 80-100%, and the thickness of the conducting material transfer ink layer is less than 2 mu m.
The conductive material of the nano-micron sheet, spherical and granular conductive material film material comprises organic, inorganic and semiconductor conductors, such as conductive high polymer, Indium Tin Oxide (ITO), F-doped tin oxide (FTO) and Al-doped zinc oxide (AZO), graphene micro-sheets, graphene oxide, carbon nano-tubes, nano-copper, gold and silver, and the like.
The main test method for the conductivity of the film material of the conductive substance comprises the following steps: GB/T3048.3-2007, GB/T1410-2006, GB/T15662-1995, ASTM D257-07, 14 and the like. These test methods only obtain the direct current resistance (sheet resistance ) and direct current bulk resistance of the conductive performance of the film material under the direct current condition. It is known that the film material of the conductive substance has the physical phenomenon of capacitance conduction, and the principle of the film material is adopted by various high-technology process means of products.
The application discovers and proposes for the first time: besides ohmic conduction and capacitance conduction, the conducting layer of the conducting material film material also has inductive conduction (inductive reactance). According to the forming mechanism, the bridge island type design formed by the main conductive material ink layer and the conductive material is applied, the alternating current impedance of the conductive ink layer is reduced, and the method is used for technological innovation of printed electronic products.
The higher the frequency of current passed through the conductive layer of the conductive substance film material, the greater the inductive reactance, due to the discovery of the phenomenon of inductive conduction (inductive reactance). In 5G and 6G ultrahigh frequency matrix circuits, switching electrode circuits, antennas and other circuits, the inductive reactance is an extremely serious objective face. In the 5G and 6G era, the number of transmitting and receiving antennas is not counted according to the root, but is "array" or "array", that is, a large-scale Multiple-Input Multiple-Output (MIMO-Multiple-Input Multiple-Output) multi-antenna technology. One application of the bridge island type conductive film is to electrically print (resonant cavity ring, microstrip antenna) patches, and when the conductive substance adopts the bridge island type structural design, the resistance of the conductive substance to the ultrahigh frequency conductive inductance can be reduced. The market is huge and prevails for a long time.
The bright point of the bridge-island design lies in the cost performance of the bridge-island conductive film. ([ 0021 ] to 5); it can be used for hot-melt pressure-bonding, composite or electronic transfer printing, and can be used for photo, thermal, electronic curing and etching.
Background
The film material of the conductive substance mainly characterizes the conductivity and the testing method comprises the following steps: GB/T3048.3-2007, GB/T1410-2006, GB/T15662-1995, ASTM D257-07, 14 and the like. These test methods only obtain the direct current resistance (sheet resistance ) and direct current bulk resistance of the conductive performance of the film material under the direct current condition. It is known that the film material of the conductive substance has the physical phenomenon of capacitance conduction, and the principle of the film material is adopted by various high-technology process means.
Patent documents in this field include, to the best of the applicant's ability:
1, CN 201610244164-preparation of a transparent film-application publication;
2, KR20190069102(a) -TRANSPARENT CONDUCTIVE FILM AND TOUCH PANEL USING THE SAME transparent conductive film and touch panel;
KR20190073605(A) -CONDUCTIVE FILM AND process METHOD for producing the same;
4, CN 201110032154-a thermal transfer conductive foil and a preparation method thereof-approval authorization;
the above lack [ 0012 ] shows that the film material (conductive film) of the conductive substance has the main characteristic of lacking 'conductivity', and the creative scheme of improving the 'conductivity' exists, and some conductive films cannot be inked at all and can not be generated practically.
CN 201110032154-a thermal transfer conductive foil and a method for making the same, more specifically an application style consistent for several decades, in which "independent claims are made by combining numbers. The independent claims of the method are that the thickness of the transfer printing layer is 2-20 mu m, the transfer printing layer consists of 40-90% of connecting material, 10-60% of conductive material and 0-5% of auxiliary agent by mass percentage; the method is characterized in that a connecting material is dissolved, and then a conductive material and an auxiliary agent are added to be crushed to the particle size of below 5 mu m, so that the transfer printing layer ink is obtained.
The world has already entered the era that the percentage content of conductive substances in the conductive layer is almost one hundred and the nano-micron layer thickness of the conductive layer is thick;
the nano-micron conductive substance, particularly the nano-wire is not allowed to be crushed and not allowed to be mechanically stirred when being used for preparing ink;
as one of electronic printing materials, a film material (conductive film) of a conductive substance mainly represents innovation of improvement of "conductivity" and improvement of cost performance, and is the main melody. No innovation of "conductivity" characterization, only "combined in numerical permutation as its independent claim";
the nano-micron conductive material has extremely large specific surface area and high surface energy, so that the nano-micron conductive material always has a tendency of shrinkage and agglomeration and is not crushed. Therefore, the overcoming of the wrinkle disorder and shrinkage agglomeration of the conductive material is the ridge that the rotating-around does not pass in various conductive films, which is the first priority for determining the conductive performance of the conductive film. No mention is made of this, so-called innovation, which is likewise absent.
The present application proposes: besides the ohmic conduction and capacitance conduction phenomena, the conductive layer of the conductive material film material also has the phenomenon of inductive conduction (inductive reactance). The film material of the bridge island type conductive substance, called bridge island type conductive film for short, is composed of a base film, a conductive substance ink layer and necessary auxiliary functional layers, and is one of the methods for overcoming inductive reactance of the conductive substance film material, improving comprehensive conductivity and improving cost performance of the conductive film.
When the conductive substance of the conductive substance film material is a graphene nanosheet, the conductive substance layer is 8 microns thick; the sheet resistance was 16. omega./sq (ASTM D257-07, parallel bar sheet resistance test method). Meanwhile, by adopting the test method, when the input direct current is changed into an alternating power supply of 4MHz and 8MHz at the same test point of the same sample, the surface resistance (including direct current ohmic resistance, capacitance resistance and inductance resistance) of the sample is increased from 16 omega/sq to 21.03 omega/SqLc and 44.0 omega/SqLc. In the parallel rod sheet resistance measurement, the comprehensive sheet resistance is obviously increased along with the improvement of the frequency rate! It is known that the capacitive reactance decreases with increasing frequency, and the inductive reactance increasing with frequency is objectively unanimous. Different conductive substances and conductive substance film materials with different shapes have inductive conduction (inductive reactance) phenomena to different degrees.
According to the inductive reactance forming mechanism, the bridge island type design formed by the conductive ink layer and the conductive substance is adopted, the alternating impedance (or the opposite) of the conductive ink layer is reduced, and the method is used for product process innovation.
The higher the frequency of current passed through the conductive layer of the conductive substance film material, the greater the inductive reactance, due to the discovery of the phenomenon of inductive conduction (inductive reactance). The flexible conductive film has excellent application prospect in the product fields of switch electrode circuits, printed electronics, 5G and 6G ultrahigh frequency matrix circuits, mass antenna patches and the like, and realizes roll-to-roll (R2R) production of flexible conductive films and developed products thereof. In the 5G and 6G era, the number of transmitting and receiving antennas is not counted according to the root, but is "array" or "array", that is, a large-scale "Multiple-Input Multiple-Output" multi-antenna technology (MIMO-Multiple-Input Multiple-Output). Inductive reactance is an extremely severe objective confrontation of transmit and receive antennas. One of the applications of the bridge island type conductive film is to print (resonant cavity ring, microstrip antenna) patch electronically, when the conductive material adopts the bridge island type structural design, it can reduce its inductive reactance to the ultra-high frequency conductive, reduce the conductive material consumption, and have outstanding performance price ratio at the same time. The market is huge and prevails for a long time.
Disclosure of Invention
Besides ohmic conduction and capacitance conduction, the conductive layer of the conductive material film material also has inductive conduction (inductive reactance). The bridge island type conductive film is composed of a base film, a conductive substance ink layer and necessary auxiliary functional layers, and is one of the methods for overcoming the inductive reactance of the conductive substance film material, improving the comprehensive conductivity and improving the cost performance of the conductive film. The flexible conductive film has excellent application prospect in the product fields of switch electrode circuits, printed electronics, 5G and 6G ultrahigh frequency matrix circuits, mass antenna patches and the like, and realizes roll-to-roll (R2R) production of flexible conductive films and developed products thereof.
The conductive substance includes: flake (including triangular flake), spherical, olive and granular (including cubic) organic and inorganic conductors and semiconductors in nano-micron form, such as conductive high polymer, Indium Tin Oxide (ITO), F-doped tin oxide (FTO) and Al-doped zinc oxide (AZO), graphene microchip, silver-plated nano graphite microchip, graphene oxide, carbon nanotube, nano copper, gold and silver, or physicochemical modified structures thereof.
The nano-micron conductive substance has a large specific surface area, and the high surface energy enables the nano-micron conductive substance to have a tendency of shrinkage and agglomeration forever. Therefore, the overcoming of the wrinkle disorder and shrinkage agglomeration of the conductive substance is the ridge which does not pass through the rotating-around in the production of various conductive films, and is the first place for determining the conductive performance of the conductive film. The physical contact points of the conductive material film material formed by the graphene micro-sheets of the non-bridge island type conductive material film material structure are three-dimensionally random (see figure description [0025] table 1: figure 1), and the conductive micro-current does not move forwards linearly but has a bending part (figure 1, i → i). This three-dimensional microbending is massive, i.e. forms an inductive reactance at high frequencies. Different conductive materials and conductive material film materials with different shapes have inductive conduction (inductive reactance) phenomena in different degrees.
The degree of effective physical contact points of the micro-sheet conductive substance and the bending degree of micro-current determine the main conductive performance of the conductive film, particularly high frequency. When the 'disordered folding and shrinkage agglomeration' overcomes the defects, the effective physical contact points are reduced, the conductive micro-current curvature is large, so that the ohmic resistance is increased, and the inductive reactance resistance is increased at the same time.
Description of the drawings [ 0026 ] table 2: fig. 2 is a schematic diagram of a bridge island type conductive material film material structure. The matching of the microchip (island, bridge seat) conductive substance and the filiform (bridge) conductive substance has the following principle:
1, under the equivalent nano-micron level film forming condition, the coverage rate of filamentous conductive substances and micro-sheet conductive substances is different, and the percentage of the filamentous conductive substances is small (0021-5, the relationship between an iron cable and a paving plate);
2, different methods for reducing 'wrinkle disorder, shrinkage agglomeration' and effective physical contact point micro-current bending are provided in the film forming process of the filiform conductive substance and the microchip conductive substance;
3, the filamentous conductive substance is easier to extend than the micro-sheet conductive substance, and the micro-current bending of the effective physical contact point is small;
4, the micro-sheet conductive substance has large area and can increase effective physical contact points as islands and bridge seats of the filamentous conductive substance; the micro-current is connected in parallel, and the bending of the micro-current at the physical contact point is effectively reduced. ([ 0026 ] Table 2, FIGS. 2, 1b-2 b; 1a-4 a);
and 5, the performance price ratio is mainly important, and the comprehensive and practical performance is considered. The originality and the method of the bridge island design (0017 to 0023) of the conductive film must have the premise of high performance price ratio requirement on the conductive film. 24 cables of the great river can be used as a bridge of the military and the warrior, and the dam does not need to be built or the river does not need to be filled. For example, after sintering of a sufficiently large mass (layer thickness) of nanosilver photons, the inductive resistance of the surface resistance may be negligible, but the non-conductive film should be.
So can be popular and directly understand the bridge island formula design of conducting film: the filamentous conductive substance cannot be straightened and parallel (forward bending and inductive reactance) like a ferry rope (wire, bridge). The parallel connection effect of a small amount of flaky conductive substances (iron cable upper planks and islands) on the filamentous conductive substances (iron cables) is large (micro-current bending is reduced). The design is characterized by controlling the occupation and orientation of filiform and flaky conductive substances, overcoming the wrinkle disorder, shrinkage and agglomeration of the conductive substances and striving for effective physical contact points of the conductive substances.
Thus 1-5, the coordination of the bridge and the island is more than 1+1 and more than 2, and the bridge and the island complement each other.
The conductive film is a film material of bridge island type conductive substance capable of overcoming the inductive resistance of the surface of the conductive film, and is simply called as a bridge island type conductive film. It is composed of a basal membrane, a conductive substance ink layer and a necessary auxiliary functional layer; the flexible conductive film has a plurality of product process application forms such as composite, photoetching, electronic printing, anisotropy, electromagnetism, electrodes and the like, and is suitable for roll-to-roll (R2R) production of flexible conductive films and secondary products thereof. The organic, inorganic and semiconductor conductive material ink layer is formed by multi-dimensional overlapping of a nano-micron filamentous conductive material and at least one other conductive material in a flake shape (containing a triangular flake), a spherical shape, an olive shape, a granular shape (containing a cube) and the like, bridge-island physical contact (sintering) points are formed on the conductive materials in different shapes, control over the rheological direction of a microscopic current is realized, and high-frequency alternating inductive reactance (or reverse utilization) of the conductive ink layer is reduced, so that the ink layer is used for various product processes.
Description of the drawings table 3: FIG. 3 shows the structure of multi-class bridge island conductive material film (0027), spherical, olive-shaped, granular (including cube) conductive material (FIGS. 3-7, 8), which is doped in small amount into the structure of the bridge island conductive material film shown in FIG. 2 to function as "island", and is beneficial to reducing the contact resistance of the physical contact point of the pressure bonding when the material of the bridge island conductive material film has the process requirements of hot melting and pressure bonding. Such as welding spots, electrodes, bus bar electrodes, and hot melting and pressure bonding of anisotropic film.
The film material of the bridge island type conductive substance coated in a roll-to-roll mode or printed by special electronics and the film forming process tool thereof are designed according to the principle of [ 0021 ] 1-5. This is so:
1, the conductive substance ink layer and the auxiliary functional layer designed in a bridge island mode can be dyed (doped with reactive acid and basic dyes, disperse and vat dyes, reactive dyes or intermediates thereof and the like) when needed, and can also be bleached by physical and chemical methods such as electrons, light, heat and the like to recover the colorless transparency of the original ink layer;
2, a film material of a conductive substance in a bridge island type design, wherein the thickness of each conductive substance layer is less than 2 mu m, and the content of the conductive substance is 80-100%;
3, when the film material of the conducting material with the bridge island type design and the electronic printing material product are applied, the content of the conducting material in each conducting material layer is 80-100%, and the thickness of the conducting material transfer ink layer is less than 2 μm.
Drawings
Table 1: FIG. 1 is a schematic view of a non-bridge island type conductive material film material
Table 2: FIG. 2 is a schematic view of a bridge island type conductive material film material
Table 3: FIG. 3 shows the structure of the multi-bridge island type conductive material film
Detailed Description
Example 1 bridge island conducting film base Process (dyeing/transparentizing/bleaching)
1, base film: PI and PET, 4.6 μm, 12 μm and 72-200 μm;
2, conductive substance: the nano silver wire methanol dispersion liquid is produced by Zhejiang science, the wire diameter is 25-30nm, the length is 20-40 mu m, and the purity is more than 99.5 percent; nano mercury tablet methanol dispersion liquid, produced by imperial sea Ming, with diameter of 500nm and thickness of 20-30 nm; the nano mercury ball is made of powder material with a particle size of 50 nm.
3, primer coating: self-made acrylic acid mixture and mixed solvent dispersion liquid, high transparency and red dyeing. The melting point of the dry film is 70-80 ℃, and the primer has large initial adhesion to the silver nano-wires.
4, primer coating: slightly concave, the thickness of the layer is 0.5-1 μm;
5, coating silver wires (bridges), pre-feeding in a gradient flow manner, dispersing and pre-orienting; multiple orientation dimples coated on the primer at 100-200mg/m2(ii) a And coating the nano silver wires twice, so that the nano silver wires are respectively 45-degree oriented along the longitudinal direction of the base film. Drying, wherein the surface resistance of the dry film is 2-50 omega/sq; photon sintering, dry film surface resistance of 1-20 omega/sq, (ASTM, parallel bar surface resistance test method). When the input direct current is changed into an alternating current power supply of 8MHz at the same test point of the same sample, the surface resistance (including direct current ohmic resistance, capacitance resistance and inductance resistance) of the sample is increased to 3-30 omega/SqLC。
6, coating silver sheets (islands), pre-feeding, dispersing and pre-orienting by slope flow type narrow slits; multiple orientation micro-pits are coated on the silver nanowire layer, 100-200mg/m2(ii) a Drying, wherein the surface resistance of the dry film is 0.5-15 omega/sq; photon sintering, dry film surface resistance of 0.1-10 omega/sq, (ASTM D257-07, parallel rod surface resistance test method). Same sampleIn the same test point, when the input direct current is changed into the alternating power supply of 8MHz, the surface resistance (including direct current ohmic resistance, capacitance resistance and inductance resistance) is increased to 0.5-10 omega/SqLC。
And 7, coating silver balls (islands) and additionally coating according to application requirements.
8, the dyeing of the above glue coating can be used for color losing and bleaching in photon sintering, EB and UV curing.
EXAMPLE 2 electronic printing application of bridge island type conductive film
One application of the bridge-island type conductive film is to electrically print (resonant cavity ring, microstrip antenna) patches, and when the conductive substance adopts the bridge-island type structure design, the inductive reactance of the conductive substance to ultrahigh frequency conductivity can be reduced.
1, base film: PI heat sealing film, wherein the heat sealing temperature is 90/135 ℃;
2, bridge island type conductive film: base film PET, 4.6 μm, 12 μm, [ 0028 ] example 1, bridge island conductive film foundation process, not cross-linked cured. And the bridge island type conductive film is used for electronically transferring the PI heat-sealing film at the temperature of 70-80 ℃.
3, bridge island conductive film — R2R roto-printed electrode matrix film: internally heated letterpress rolls, e.g., electric, oil, R2R, roll print. According to the application requirement, the transfer printing compounding or the secondary processing can be carried out for multiple times.
Claims (4)
1. The conductive film is a film material of bridge island type conductive substance capable of overcoming the inductive resistance of the surface of the conductive film, and is called bridge island type conductive film for short. It is composed of a basal membrane, a conductive substance ink layer and a necessary auxiliary functional layer; the flexible conductive film has various product process application forms such as compositing, photoetching, electronic printing, anisotropy, electromagnetism, electrodes and the like, and is suitable for roll-to-roll (R2R) production of flexible conductive films and secondary products thereof. The organic, inorganic and semiconductor conductive material ink layer is a multidimensional overlapping structure of nano-micron thread conductive material and at least one other conductive material in a sheet shape (containing triangular plates), a spherical shape, an olive shape, a granular shape (containing cubes) and the like, bridge-island physical contact (sintering) points are formed on the conductive materials in different shapes, the control of the rheological direction of a microscopic current is realized, and the high-frequency alternating inductive reactance (or reverse utilization) of the conductive ink layer is reduced, so that the ink layer is used for various product processes.
2. The conductive ink layer and the auxiliary functional layer can be dyed or bleached by physical and chemical methods such as electrons, light, heat and the like as required to restore the colorless and the transparency of the original ink layer.
3. The conductive ink layer of claim 2, wherein each conductive layer has a thickness of < 2 μm and a conductive content of 80-100%.
4. The product process of claim 1, when used as a printed electronic product, wherein the conductive material is present in an amount of 80 to 100% per conductive material layer, and the conductive material transfer ink layer has a thickness of < 2 μm.
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| CN201910714849.8A CN112289485A (en) | 2019-07-22 | 2019-07-22 | Bridge island type conductive substance film material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737755A (en) * | 2011-04-06 | 2012-10-17 | 索尼公司 | Transparent conductive element and transparent conductive element manufacturing method |
| CN102830867A (en) * | 2011-06-14 | 2012-12-19 | 瀚宇彩晶股份有限公司 | Touch control display device |
| KR20180015860A (en) * | 2016-08-04 | 2018-02-14 | 연세대학교 산학협력단 | Method for manufacturing flexible transparent electrode substrate using polymer film and flexible transparent electrode substrate manufactured by the same |
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2019
- 2019-07-22 CN CN201910714849.8A patent/CN112289485A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102737755A (en) * | 2011-04-06 | 2012-10-17 | 索尼公司 | Transparent conductive element and transparent conductive element manufacturing method |
| CN102830867A (en) * | 2011-06-14 | 2012-12-19 | 瀚宇彩晶股份有限公司 | Touch control display device |
| KR20180015860A (en) * | 2016-08-04 | 2018-02-14 | 연세대학교 산학협력단 | Method for manufacturing flexible transparent electrode substrate using polymer film and flexible transparent electrode substrate manufactured by the same |
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