KR101567331B1 - Anti-Reflective Composition for Coating Metal Surfaces and Surface Treatment Method Using the Same - Google Patents
Anti-Reflective Composition for Coating Metal Surfaces and Surface Treatment Method Using the Same Download PDFInfo
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- KR101567331B1 KR101567331B1 KR1020150069405A KR20150069405A KR101567331B1 KR 101567331 B1 KR101567331 B1 KR 101567331B1 KR 1020150069405 A KR1020150069405 A KR 1020150069405A KR 20150069405 A KR20150069405 A KR 20150069405A KR 101567331 B1 KR101567331 B1 KR 101567331B1
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
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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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/04—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the coating material
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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
- C23C2/00—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor
- C23C2/34—Hot-dipping or immersion processes for applying the coating material in the molten state without affecting the shape; Apparatus therefor characterised by the shape of the material to be treated
- C23C2/36—Elongated material
- C23C2/38—Wires; Tubes
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/52—Treatment of copper or alloys based thereon
Abstract
Description
The present invention relates to surface treatment of metals. More specifically, the present invention relates to a method for inhibiting reflections occurring on a metal surface and a composition for such treatment.
Indium tin oxide (ITO), which is commercially available as a transparent electrode of a touch screen panel, is insufficient in realizing a flexible and wide screen touch screen panel because of its high electrical resistance and low ductility. Furthermore, indium is a rare earth metal and it is difficult to use it continuously. Therefore, as an alternative to the ITO transparent electrode, an electrode made of a thin metal wire, that is, a metal mesh electrode, has been highlighted. However, copper, silver, molybdenum, aluminum, nickel, and chromium, which are metals used as metal mesh electrodes, have a problem that the visibility of the display is deteriorated due to inherent high reflectivity, which causes moire phenomenon.
Therefore, in this technical field, efforts have been made to compensate for the decrease in visibility by a separate surface treatment (a blackening treatment) in order to lower the reflectivity of the metal mesh transparent electrode. For example, Korean Patent Laid-Open Publication No. 2005-0116570 discloses a method of forming a black oxide layer on a metal thin film using chlorite as an oxidizing agent. However, in this patent, progressive corrosion of the metal electrode may occur if cleaning after the formation of the black oxide layer is incomplete because a material containing chlorine ions is used. In addition, since the process is performed at a relatively high temperature of 40 to 90 ° C, it causes deformation of transparent plastic resin such as polyethylene terephthalate (PET), polycarbonate (PC), and polyethylene naphthalate (PEN) There was a danger. In addition, the thickness of the metal wiring formed by the metal mesh transparent electrode is an ultra-thin shape of less than about 1 micrometer. Under the process conditions of this patent, too, the etching of the metal wiring proceeds excessively and the resistance value rises.
Therefore, the demand for a method capable of achieving a high antireflection efficiency in this field up to now but not causing corrosion and capable of performing anti-reflection treatment at a relatively low temperature has not been satisfactorily satisfied.
The technical problem of the present invention is to provide a means for realizing an antireflection treatment of a metal, particularly a fine wire structure metal such as a mesh, under an environmentally friendly and chemically mild condition.
In order to solve the above-mentioned technical problems, an aspect of the present invention provides a waterborne composition for coating a metal surface. This composition contains 10 to 300 g / L of hexagonal metal oxide per liter, 1 to 50 g / L of corrosion inhibitor, 10 to 100 g / L of stabilizer, 0.1 to 10 g / L of nonionic surfactant and 200 to 950 of water g / L. In one specific embodiment of the present invention, the coating composition contains a corrosion inhibitor and a stabilizer in a weight ratio of corrosion inhibitor: stabilizer = 1: 2 to 1:10.
Another aspect of the present invention discloses a method of treating a surface of a metal wire. This surface treatment method
(A) stacking a conductive metal on a transparent substrate;
(B) removing a portion of the metal layer to form a mesh-shaped metal wire; And
(C) immersing the mesh-shaped metal conductor in a water-based coating composition at a temperature of 5 ° C to 35 ° C. At this time, the above-mentioned metal surface coating composition of the present invention can be used as this waterborne coating composition.
The metal surface coating composition of the present invention and the surface treatment method of a metal wiring using the metal surface coating composition of the present invention can maintain the thickness change of the metal to be treated at 100 nm or less while the blackening treatment ability for reflection suppression is excellent. Therefore, it is possible to manufacture a transparent electrode-based touch screen panel having excellent visibility and excellent signal transmission over a large area because there is no change in resistance value when used in a display field. In addition, since the antireflection treatment of the metal can be performed simply and quickly under relatively low temperature, low corrosiveness, and aqueous conditions, the process can be easily managed and damage to the substrate can be prevented.
1 is a schematic view showing a structure in which a
Fig. 2 is a photograph showing a state before and after processing in a bezel area of a touch screen panel subjected to a surface treatment (blackening treatment) according to the method of the present invention.
Fig. 3 is a photograph of a window region of a touch screen panel subjected to a surface treatment (blackening treatment) according to the method of the present invention before and after treatment.
4 is an electron micrograph of a cross-section showing a change in thickness of an electrode in a metal mesh electrode subjected to surface treatment (blackening treatment) according to the method of the present invention.
Hereinafter, the present invention will be described in detail. In interpreting the terms or words used in the present specification and claims, the inventors should interpret the present invention on the principle that the inventor can properly define the concept of the term in order to explain its own invention in the best way . That is, the terms used in describing the present invention are not necessarily interpreted by ordinary or dictionary meanings, but should be construed in accordance with the technical idea of the present invention.
Hereinafter, the present invention will be described in more detail with reference to the drawings.
One aspect of the invention discloses a waterborne coating composition for coating metal surfaces. The waterborne coating compositions of the present invention are useful for coating metal surfaces, particularly conductive metal surfaces that make up interconnects in electronic circuits, for example, to coat metal surfaces of copper, nickel or copper / nickel alloys.
The metal surface coating composition of the present invention may include a hexagonal metal oxide, a corrosion inhibitor, a stabilizer, and a nonionic surfactant based on water, and may further include other additives. The metal surface coating composition of the present invention does not contain a large amount of an oxidizing agent or an alkali, and therefore has low corrosiveness to metals.
In the coating composition of the present invention, the hexagonal system metal oxide is adsorbed on the surface of a metal to be coated to form a blackening layer, thereby preventing reflection.
In the present specification, the hexagonal metal oxide refers to a metal oxide having a hexagonal crystal system, and may be a single metal oxide or a composite oxide having a plurality of metal atoms. Examples of suitable metals for the hexagonal metal oxide of the present invention include beryllium, carbon, magnesium, scandium, titanium, cobalt, zinc, selenium (Se), yttrium (Y), zirconium, technetium (Tc), ruthenium, cadmium , Tellurium (Te), hafnium, rhenium, osmium, thallium (Tl). The metal oxides containing two or more of the above-described metal atoms may be used in the coating composition of the present invention if the two or more kinds of metal atoms together form one hexagonal lattice. A mixture of two or more different hexagonal metal oxides Can be used in the coating composition of the present invention.
Although not intending to be bound by any particular theory as to the working principle of the coating composition of the present invention, it will be appreciated that, for purposes of better understanding of the present invention, the use of hexagonal metal oxides, It is advantageous because the surface reflectance of the metal can be lowered while minimizing the thickness reduction of the metal.
In the metal surface coating composition of the present invention, the hexagonal metal oxide may be contained in the composition in a proportion of 10 to 300 g / L.
In the coating composition for metal surfaces of the present invention, the corrosion inhibitor plays a role of preventing the metal to be coated from being dissolved by the stabilizer described later and corroding. Such corrosion inhibitors in the coating compositions of the present invention can be used as metal corrosion inhibitors under acidic aqueous environments in the art, and there is no particular limitation. In one specific embodiment, for example, inorganic salts selected from silicates, nitrates, molybdates and mixtures thereof of alkali metal or ammonium ions can be used. Some examples of inorganic salt corrosion inhibitors include nitrates such as silicates, including sodium metasilicate, ammonium nitrate, sodium nitrate, potassium nitrate. In another specific embodiment, an organic acid selected from citric acid (citric acid), benzoic acid (benzoic acid), lactic acid (lactic acid), succinic acid (succinic acid) and mixed acids thereof can be used.
The corrosion inhibitor in the coating composition of the present invention is suitable when it occupies a content of 1 to 50 g / L. When the content of the corrosion inhibitor falls within this range, etching is not caused even when the corrosion inhibiting function against a metal, for example, a copper wiring is exerted and exposed to a sulfuric acid component or the like in the coating composition. On the other hand, when the content of the corrosion inhibitor is less than 1 g / L, the corrosion inhibiting effect can not be expected, and even if the content exceeds 50 g / L, the corrosion inhibiting effect is not improved.
In the coating composition of the present invention, the stabilizer serves to keep the hexagonal metal oxide in a stable ionic state in the composition of the present invention. As the stabilizer in the composition of the present invention, phosphoric acid, sulfuric acid, acetic acid (acetic acid), formic acid (formic acid) or a mixture thereof may be used. The stabilizer in the coating composition of the present invention is suitable when it occupies a content of 10 to 100 g / L. When the content of the stabilizer is within this range, the hexagonal metal oxide is preferable because it exists in a stable ion state in the composition. On the other hand, when the stabilizer content is less than 10 g / L, the solution stabilizing effect of the composition of the present invention can not be expected. Even if the stabilizer content exceeds 100 g / L, the solution stabilization effect of the composition is not improved.
In one specific embodiment of the coating composition of the present invention, the corrosion inhibitor and the stabilizer are mixed at a weight ratio of corrosion inhibitor: stabilizer of 1: 2 to 1:10. While not intending to be bound by any particular theory as to the working principle of the coating composition of the present invention, it is only intended to attempt to explain the present invention in order to facilitate the understanding of the present invention. When the content of the corrosion inhibitor and stabilizer is within this range, So as to achieve the coating purpose while minimizing the thickness of the film. On the other hand, when the mixing ratio is less than 1: 2, formation of the coating for preventing reflection becomes insufficient, and when the mixing ratio exceeds 1:10, the thickness of the metal to be coated may excessively decrease. Some combinations of citric acid and phosphoric acid, citric acid and sulfuric acid, citric acid and phosphoric acid + sulfuric acid, lactic acid and sulfuric acid + formic acid, benzoic acid and phosphoric acid + sulfuric acid, sodium metasilicate and phosphoric acid are some of the combinations of corrosion inhibitor and stabilizer .
In the coating composition of the present invention, the surfactant serves to prevent the residue after the antireflection coating (blackening treatment) from remaining on the substrate on which the metal (wiring) layer or the metal (wiring) layer is mounted. When a nonionic surfactant is used as the surfactant in the composition of the present invention, an excellent effect can be obtained. The nonionic surfactant usable in the metal surface coating composition of the present invention is not particularly limited as long as it is used in the technical field. Examples of nonionic surfactants usable in the composition of the present invention include polyoxyalkylene ethers, specifically polyoxyethylene lauryl ethers. In the metal surface coating composition of the present invention, the surfactant is suitable when it occupies a content of 0.1 to 10 g / L.
The metal surface coating composition of the present invention may be composed of only the water other than the above-mentioned components, that is, the water remaining in addition to the above-mentioned components, and in addition to the above-described components and water, additives commonly used in this technical field As shown in FIG. These additives are familiar to the average person skilled in the art and are not described here in detail. The water that can be used in the metal surface coating composition of the present invention may be suitably selected using pure water or ultra pure water grades commonly used in the art, but is not necessarily limited to this grade. The content of water in the composition of the present invention is suitably from 200 g / L to 950 g / L.
As described above, the present invention provides a waterborne coating composition for a metal surface having the above-mentioned combination of compositions, which can effectively and rapidly coat a metal surface, in particular a mesh-like conductive wiring, . As a specific example, the coating composition of the present invention may be used for blackening the metal mesh electrode of the touch screen panel. Such coating treatment can be completed simply by immersing the object metal in the coating composition of the present invention, and is excellent in terms of harmfulness, safety, and manageability by using an aqueous composition that does not use an oxidizing agent, a strong alkali, or a large amount of an organic solvent and is environmentally friendly . Further, in a preferred embodiment of the composition of the present invention, the reduction of line width due to residue generation, uneven coating, unwanted etching of the treated metal surface can be minimized. For example, in a more specific embodiment of the present invention, it is possible to coat at a high speed under a normal temperature process condition of 5 ° C to 35 ° C, for example, for a treatment time of 1 minute or less.
According to another aspect of the present invention, there is provided a surface treatment method of a metal conductor formed on a transparent substrate. This method
(A) stacking a conductive metal on a transparent substrate;
(B) removing a portion of the metal layer to form a mesh-shaped metal wire; And
(C) immersing the mesh-shaped metal wire at a temperature of 5 to 35 in a water-based coating composition. At this time, the above-mentioned metal surface coating composition of the present invention can be used as this waterborne coating composition.
Hereinafter, a surface treating method of the metal wire of the present invention will be described with reference to FIG. 1 is a schematic diagram showing a structure in which a
A method of forming the structure illustrated in FIG. 1 using the present invention will be described below.
In the surface treatment method of the present invention, a transparent synthetic resin commonly used in the technical field, for example, a touch screen display field, may be used as the transparent substrate. For example, acrylic resin such as polyethylene terephthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN), and polymethylene methacrylate may be used as the transparent material. Adoption of such a transparent substrate and its thickness, surface treatment, and the like can be used as those conventionally used in this field. The method can also utilize a method commonly used in this industry, and therefore is not described here.
Step (a) in the surface treatment method of the present invention is a step of laminating a layer of a conductive metal on such a transparent substrate. As the conductive metal, for example, copper, nickel or copper / nickel alloy may be used, but the present invention is not limited thereto. The lamination of the conductive metal layer can be realized in a manner known in the art, for example, a known technique such as deposition of a metal, surface adsorption after reduction of a metal precursor (electrolysis, etc.), plating or the like can be used. Therefore detailed process conditions for lamination are not described in detail herein. In a specific embodiment of the present invention, the thickness of the conductive metal layer may be set to 0.1 to 2 μm for thinning the wiring width in manufacturing the metal mesh electrode from the conductive metal layer. In this case, the wiring width of the mesh electrode can be 3 m or less, which is preferable.
Subsequently, step (b) is a step of forming a metal wire pattern for converting the above-described conductive metal layer into a mesh-shaped wire. For example, photolithography can be used to form a pattern for removing a part of the conductive metal layer and converting it into a metal wiring having a desired shape. A well-known wet method (for example, etching) can be used to remove a part of the metal layer after forming the pattern by lithography. For example, a hydrogen peroxide-sulfuric acid-based etching solution can be used for etching the copper metal. Those skilled in the art will not further elaborate here because it is possible to appropriately select the pattern forming method and process conditions for producing the desired mesh-shaped metal wiring.
The subsequent step (c) in the surface treatment method of the present invention is a step of covering the mesh-shaped metal conductor with the above-mentioned water-based coating composition. In this step, metal wires can be coated relatively quickly under room temperature process conditions. For example, in one specific embodiment, the mesh-shaped metal wire can be immersed in the coating composition of the present invention at a process temperature in the range of 5 ° C to 35 ° C and immersed in the coating composition for a time period of, for example, . The coating composition of the present invention provides a means for relatively quick surface treatment at low temperature in a chemically less irritating mild environment. Therefore, when the coating composition of the present invention is used, thermal deformation or chemical transformation of the synthetic resin constituting the transparent substrate can be minimized.
Fig. 1 is a schematic diagram showing a state in which the cover is formed in this manner. In the embodiment of the present invention shown in FIG. 1, the metal mesh electrode of the touch screen panel is the mesh metal wire. When the
Further, by using the low-e ective surface treatment method of the present invention, the width reduction of the wiring layer can be maintained at a desirable level of 100 nm or less.
[ Example ]
Hereinafter, the present invention will be described in more detail with reference to the following examples and experimental examples. However, this is for the purpose of illustrating the present invention, and the scope of the present invention is not limited thereto.
PREPARATION EXAMPLE 1 Preparation of Metal Mesh Electrode
A copper mesh electrode was prepared as follows. Transparent polyethylene terephthalate (PET, product name: XG7HU7) of high-tech material from Toray was coated with electroless chemical copper plating (HVF- (H)) on a 125 μm double-sided material to form a 1 μm thick copper layer. Subsequently, a copper mesh electrode having a wiring width of 2 占 퐉 was formed by a conventional lithography process.
PREPARATION EXAMPLE 2 Preparation of Copper Coating Composition
(Comparative Examples 1 to 5) or coating compositions according to the present invention (Examples 1 to 4) for blackening treatment of the surface of the copper mesh electrode, respectively. The coating compositions of these Examples and Comparative Examples contained the components per liter in the proportions listed in Table 1 below and the remainder in water.
※ Polyoxyethylene lauryl ether nonionic surfactants available from Southeast Asia Synthesis
≪ Experimental Example > Comparative evaluation of blackening performance
The copper mesh electrodes obtained in the above Production Examples were immersed in the coating compositions of Examples and Comparative Examples shown in Table 1 and subjected to the blackening treatment according to the process conditions shown in Table 2. For evaluation of the blackening treatment performance, the degree of decrease in the appearance, the width of the copper wiring, the degree of decrease in the electrode thickness, and the brightness (L * ) and the shea balance (b * ) after the blackening treatment were measured. . The overall evaluation was then carried out. When the blackened mesh electrode meets all the five evaluation criteria of the individual items described above, it is excellent. If the four items are satisfied, the excellent, and if the one to three items are satisfied, The ultimate aim of the invention was judged to be inadequate when the degree of coverage (brightness, sheen balance) was insufficient.
* L * and b * indicate luminosity coordinates (positive yellow, negative blue) in the CIELab color system and lightness (white, 100, black 0) and y coordinate of the y coordinate.
From the results of comparative experiments in Table 2, it can be clearly seen that it is essential to have a combination structure of metal oxide, corrosion inhibitor, stabilizer and nonionic surfactant to solve the technical problem of the present invention. For example, in the case of Comparative Examples 4 and 5, although the components and the coating composition according to the present invention are substantially common, the non-ionic surfactant is not included, so that the blackening level (antireflection) is poor. This is because the effect of the coating composition and the surface treatment method according to the present invention is an integral effect resulting from the above-mentioned combination constitution and not an effect of this kind that occurs even excluding the elements which seem to be relatively unimportant in this combination composition Point.
The coating composition and the surface treatment method according to the present invention are excellent in the visibility and the blackening treatment effect when applied to the mesh electrode constituting the touch screen panel. Fig. 2 shows a vezel region of a touch screen panel obtained by blackening using the coating composition of Example 3 of the present invention and the process conditions of Table 2. Fig. This touch screen panel is the same as the mesh electrode of Production Example 1. In FIG. 2, the left side corresponding to the state before the blackening treatment is reduced in visibility due to the reflectivity of the copper itself, and the blackening surface treatment on the right side after the blackening treatment can be seen to be uniform. The effect of blackening the window region of the touch screen panel as shown in Fig. 2 using the coating composition of Example 3 and the process conditions of Table 2 can be seen in Fig. 3, The decrease in visibility caused by the reflection of copper is effectively suppressed.
On the other hand, the etching solutions of Comparative Examples 1 to 3, which are coating compositions of the prior art using a chlorine-based oxidizing agent in an alkaline condition, show that the wiring width and the thickness of the mesh electrode are remarkably reduced compared to Examples 1 to 4 according to the present invention. . In the surface treatment method using the coating composition of the present invention, the decrease in the thickness of the metal wiring such as the metal mesh electrode is minimized can be confirmed from FIGS. 4A to 4C. FIG. 4 is an electron micrograph of a copper mesh electrode prepared in Preparation Example 1 and subjected to a surface treatment using the coating composition of Example 3 and the process conditions of Table 2, followed by FIB (Focused Ion Beam) cross-sectional analysis. 4A is a view of a metal mesh electrode having a coating, 4b is a cross-sectional view of the FIB cross section, and 4c is a 2-fold (20,000 times) enlarged view of 4b. The copper mesh electrode of Fig. 4 had a thickness reduction of less than 0.1 mu m. This shows that the coating composition of the present invention can be blackened while minimizing the thickness change of the copper mesh electrode.
Further, the coating composition of the present invention can be blackened more rapidly under the process conditions that are milder than those of the comparative examples (in comparison with 1 to 3 in the comparison), and the reduction in the thickness of the mesh electrode is less and the blackness is superior in similar conditions .
While the present invention has been particularly shown and described with reference to certain exemplary embodiments thereof, it should be understood that the same is by way of illustration and example only and is not to be taken by way of limitation. It will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims. .
Accordingly, all equivalents of the claims and their equivalents, as well as the embodiments described hereinabove and the appended claims, are also within the scope of the present invention.
10: transparent substrate
20: Metal mesh transparent electrode
30: Blackening layer
Claims (11)
10 to 100 g / L of at least one stabilizer selected from the group consisting of hexagonal metal oxide 10 to 300 g / L, corrosion inhibitor 1 to 50 g / L, phosphoric acid, sulfuric acid, acetic acid and formic acid, 0.1 to 10 g of nonionic surfactant / L of water and 200 to 950 g / L of water.
Removing a portion of the metal layer to form a mesh-shaped metal wire; And
And a step of immersing the mesh-shaped metal wire in a water-based coating composition at a temperature of 5 ° C to 35 ° C,
Wherein the water based coating composition comprises 10 to 100 g / L of at least one stabilizer selected from the group consisting of 10 to 300 g / L hexagonal metal oxide, 1 to 50 g / L corrosion inhibitor, phosphoric acid, sulfuric acid, acetic acid, 0.1 to 10 g / L of a nonionic surfactant and 200 to 950 g / L of water.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107460464A (en) * | 2017-08-28 | 2017-12-12 | 厦门大学 | A kind of surface treatment method of copper-bearing materials |
| US10684698B2 (en) | 2017-06-30 | 2020-06-16 | Samsung Display Co., Ltd. | Display device and method of fabricating the same |
| JP2021001372A (en) * | 2019-06-21 | 2021-01-07 | 日本表面化学株式会社 | Metal surface treatment liquid, and metal surface treatment method |
-
2015
- 2015-05-19 KR KR1020150069405A patent/KR101567331B1/en active IP Right Grant
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10684698B2 (en) | 2017-06-30 | 2020-06-16 | Samsung Display Co., Ltd. | Display device and method of fabricating the same |
| US11199935B2 (en) | 2017-06-30 | 2021-12-14 | Samsung Display Co., Ltd. | Display device and method of fabricating the same |
| CN107460464A (en) * | 2017-08-28 | 2017-12-12 | 厦门大学 | A kind of surface treatment method of copper-bearing materials |
| CN107460464B (en) * | 2017-08-28 | 2019-11-01 | 厦门大学 | A kind of surface treatment method of copper-bearing materials |
| JP2021001372A (en) * | 2019-06-21 | 2021-01-07 | 日本表面化学株式会社 | Metal surface treatment liquid, and metal surface treatment method |
| JP7347751B2 (en) | 2019-06-21 | 2023-09-20 | 日本表面化学株式会社 | Metal surface treatment method |
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