TWI464055B - Method for manufacturing film - Google Patents

Description

Film manufacturing method

This invention relates to a method of making a film, and more particularly to a method of coating a film on the surface of a substrate.

With the popularity of portable electronic devices, in order to maintain their appearance, the protection requirements for the surface of the outer layer of such portable electronic devices are also increasing. Currently, in order to protect the outer surface of these electronic devices, a thin film such as an anti-fouling film is usually applied on the outer surface of the electronic device. For example, the touch screen surface of a currently popular touch-sensitive electronic device is usually provided with a layer of anti-fouling film, so that the surface of the screen maintains good display quality after repeated rubbing by the user. Operational sensitivity.

In general, most of the films covered on such surfaces have good stain resistance, can prevent fingerprint sticking, smooth touch, waterproof and oil discharge and transparency. In addition, such films require high adhesion to the outer surface of the device to which they are coated to extend the useful life of the film.

At present, there are mainly four ways of coating a film on the surface of a substrate to be treated. The first method is a vacuum evaporation method in which a film coating is heated under a substrate in a vacuum environment to vaporize the film coating and adhere to the lower surface of the substrate, thereby being on the lower surface of the substrate. A film is formed. The advantage of this method is that it can be coated on one side to avoid waste of paint. However, this coating method requires vacuuming of the evaporation reaction chamber, so the equipment is expensive, the processing time is increased, and the production capacity is poor.

The second method is a dipping coating method in which a substrate to be treated is immersed in a film coating solution, and the substrate to be treated is taken out from the film coating solution, thereby applying the film coating to be treated. On the surface of the substrate. However, the disadvantage of this coating method is that the substrate to be treated is multi-faceted, resulting in waste of the coating.

The third way is a spray coating method in which a spray device directly sprays the surface of the substrate to be treated, and the film coating is sprayed on the surface of the substrate to be treated, thereby the substrate to be treated. A film is formed on the surface. However, most of the paint sprayed by the spray device has contacted the surface of the substrate to be treated before it has been vaporized, so that the spray droplets sprayed from the spray device will drip on the surface of the substrate to be coated. As a result, the uniformity of the formed film will be poor.

The fourth method is a brush coating method in which a film coating is directly applied to the surface of a substrate to be treated with a brush. However, such a coating method often causes a phenomenon of repeated coating between adjacent two painted regions, resulting in uneven film formation.

Accordingly, it is an aspect of the present invention to provide a method of producing a film which can apply a film coating on the surface of a substrate to be treated efficiently, uniformly and densely.

Another aspect of the present invention is to provide a method for producing a film which can adjust the amount of use of the film coating according to the size of the surface to be coated of the substrate, thereby greatly reducing the waste of the film coating.

According to the above object of the present invention, a method of producing a film comprising the following steps is proposed. A substrate is provided. The surface of the substrate is subjected to an activation treatment to form a plurality of functional groups on the surface of the substrate. A liquid film is formed to cover the surface of the substrate. A film coating solution is introduced onto the surface of the liquid film. Wherein, the thin film coating solution comprises a plurality of thin film coating molecules, and each of the thin film coating molecules comprises a first end and a second end after reacting with the liquid film, and the first end is dissolved in the surface of the liquid film. The liquid film is volatilized to lower the first end to the surface of the substrate. The first ends are each bonded to a functional group to form a film on the surface of the substrate.

According to an embodiment of the invention, each of the first ends comprises a hydrophilic group, and each of the second ends comprises a hydrophobic group.

According to another embodiment of the invention, the step of performing the activation treatment comprises using a plasma.

According to still another embodiment of the present invention, the step of performing the activation treatment comprises using a chemical agent.

According to still another embodiment of the present invention, the liquid film comprises a solution, and the solution comprises water, alcohols, ketones, polar molecular liquids or a mixture thereof.

According to still another embodiment of the present invention, the solution further comprises a non-polar liquid molecular additive.

According to still another embodiment of the present invention, the step of forming the liquid film is by a wetting method, a spraying method, a spraying method, a steam method or a brush coating method.

According to still another embodiment of the present invention, the step of introducing the film coating solution is by a droplet method, a droplet approach method, a spray method, a vapor method or a spray method.

According to still another embodiment of the present invention, the thin film coating molecule comprises a plurality of antifouling coating molecules, and each antifouling coating molecule comprises a fluorocarbon having a fluorene-alkyl (Si-R) functional group, 矽-alkane. The functional group reacts with water to form a hydrazine-hydroxy (Si-OH) functional group.

According to still another embodiment of the present invention, the film coating solution further comprises a solvent, and the solvent comprises a fluoride component, an alcohol, an alcohol compound, a ketone, a ketone compound, an ether or an ether compound.

According to still another embodiment of the present invention, the film coating molecule comprises a fluorocarbon hydrocarbon compound, a perfluorocarbon hydrocarbon compound, a fluorocarbon hydrocarbon compound, a perfluorodecane hydrocarbon compound, a perfluorodecane hydrocarbon compound. a compound, a chlorine-containing perfluorodecane hydrocarbon compound, or a chlorine-containing perfluorodecane hydrocarbon compound.

According to still another embodiment of the present invention, the step of volatilizing the liquid film comprises performing a heat treatment to accelerate the evaporation rate of the liquid film.

In accordance with still another embodiment of the present invention, the step of bonding the first end to the functional group, respectively, comprises performing a rest process.

According to still another embodiment of the present invention, the step of bonding the first end to the functional group, respectively, comprises performing a baking treatment.

In accordance with still another embodiment of the present invention, the functional group comprises a plurality of hydroxy functional groups, a plurality of nitrogen hydrogen functional groups, a hydrogen containing tubular group, and/or a plurality of vacant bonds.

Please refer to FIG. 1 and FIG. 2A to FIG. 2D , wherein FIG. 1 is a flow chart showing a method for manufacturing a film according to an embodiment of the present invention, and FIGS. 2A to 2D are diagrams according to the present invention. A process sectional view of a method of producing a film according to an embodiment of the invention. The coating method of the film of the present embodiment can be applied, for example, to the production of an antifouling film or a self-aligned monolayer film (SAM).

As shown in FIGS. 1 and 2A, in the method 100 for manufacturing a film of the present embodiment, the substrate 200 may be provided as described in step 102. The substrate 200 can be, for example, a protective glass, a plastic substrate, a tempered glass, or a metal substrate.

Next, as described in step 104, the surface 202 of the substrate 200 is cleaned and activated using, for example, plasma to form a plurality of functional groups 204 on the surface 202 of the substrate 200. In one example, a working gas such as nitrogen, argon, oxygen, or air may be utilized to produce a plasma. After the plasma treatment, the functional group 204 produced on the surface 202 of the substrate 200 is a functional group capable of forming a bond with the subsequently introduced thin film coating molecule 208. In some embodiments, functional group 204 can comprise a hydroxyl functional group, a nitrogen hydrogen functional group, a hydrogen containing tubular energy group, and/or an empty dangling bond.

In one embodiment, the surface 202 of the substrate 200 can be activated using atmospheric plasma or low pressure plasma. The atmospheric plasma may be, for example, a plasma jet or a plasma torch or a dielectric barrier discharge (DBD or an atomic glow discharge). The low pressure plasma can be, for example, a vacuum plasma.

In another embodiment, the surface 202 of the substrate 200 can be activated using a chemical. The chemical agent includes an interface agent, an acid solution, an alkali solution, or the like, or an organic solvent, a mixed solution thereof, or the like.

After the surface 202 of the substrate 200 is activated, the liquid film 206 is formed over the surface 202 of the substrate 200 as described in step 106. In some embodiments, a layer of liquid film 206 may be applied to surface 202 of substrate 200 by an infiltration process, a spray process, a spray process, a vapor process, or a brush coat process. Thus, the liquid film 206 also covers the functional groups 204 on the surface 202 of the substrate 200 at the same time. Liquid film 206 contains a solution. In one embodiment, the solution is selected from a water miscible liquid. In some examples, the solution can comprise, for example, water, alcohols, ketones, polar molecular liquids, or mixtures thereof. In other embodiments, the solution more selectively comprises a non-polar liquid molecular additive.

Next, as described in step 108, a film coating solution is provided and the film coating solution is introduced into the surface of the liquid film 206. In some embodiments, the thin film coating solution can be introduced into the surface of the liquid film 206 by a droplet method, a droplet approach method, a spray method, a vapor method, or a spray method. As shown in Figure 2A, the thin film coating solution contains a plurality of thin film coating molecules 208 and a solvent. The solvent of the film coating solution may preferably comprise, for example, a highly volatile liquid, water, or a liquid in which a highly volatile liquid and water are mixed. In a preferred embodiment, the vapor pressure of the high volatility liquid at normal temperature is greater than the vapor pressure of water, and the high volatility liquid may comprise alcohols, ethers, alkanes, ketones, benzenes, fluorine. Alkyl alcohols, fluorine-containing ethers, fluorine-containing alkanes, fluorine-containing ketones or fluorine-containing benzenes.

When the thin film coating molecules 208 are introduced into the surface of the liquid film 206, the thin film coating molecules 208 react with the liquid film 206. The thin film coating molecule 208 after reacting with the liquid film 206 has a first end 210 and a second end 212. The first end 210 of the thin film coating molecule 208 is soluble in the surface of the liquid film 206. In one embodiment, the first end 210 of the thin film coating molecule 208 comprises a hydrophilic group 214, and the second end 212 of the thin film coating molecule 208 comprises a hydrophobic group (not shown).

In embodiments in which the antifouling film is made, the film coating molecules 208 comprise a plurality of antifouling coating molecules. Moreover, these antifouling film coating molecules contain fluorocarbons, and this fluorocarbon compound has a fluorene-alkene (Si-R) functional group. The chemical formula of this fluorocarbon is, for example, F---Si-R. In this embodiment, the solvent of the thin film coating solution may contain a fluoride component, an alcohol, an alcohol compound, a ketone, a ketone compound, an ether or an ether compound to uniformly dissolve the antifouling film coating. In some examples, the antifouling coating molecules comprise a fluorocarbon hydrocarbon compound, a perfluorocarbon hydrocarbon compound, a fluorocarbon hydrocarbon compound, a perfluorodecane hydrocarbon compound, a perfluorodecane hydrocarbon compound, A chloroperfluorofluoroalkane ether compound or a chlorine-containing perfluorodecane hydrocarbon compound.

The Si-R functional group of the thin film coating molecule 208 can react with water in the air or in the liquid film 206 to form a ruthenium-hydroxy (Si-OH) functional group. For example, the fluorocarbon F---Si-R reacts with water to form F---Si-OH. Since the hydrophilic group 214 of the first end 210 of the thin film coating molecule 208, such as an OH group, has a better affinity with a polar molecular liquid such as water in the liquid film 206, the first end 210 of the thin film coating molecule 208 gradually dissolves in the liquid. The surface of the membrane 206. On the other hand, the hydrophobic group of the second end 212 of the thin film coating molecule 208 and the polar molecular liquid such as water repel each other, and thus the thin film coating molecule 208 cannot be completely dissolved in the liquid film 206. As a result, the thin film coating molecules 208 can float on the liquid film 206 under the support of the surface tension of the liquid film 206. In addition, the film coating molecules 208 can be regularly and closely arranged on the surface of the liquid film 206 as shown in FIG. 2A.

Upon completion of the introduction of the film coating solution, the liquid film 206 is volatilized as described in step 110 of FIG. 1 whereby the film coating molecules 208 on the surface of the liquid film 206 are lowered to the surface 202 of the substrate 200. When the liquid film 206 is volatilized, the liquid film 206 can be naturally volatilized. Alternatively, when the liquid film 206 is volatilized, heat treatment is simultaneously performed to accelerate the evaporation rate of the liquid film 206.

After the liquid film 206 is volatilized, the film coating molecules 208 are lowered and adhere to the surface 202 of the substrate 200. Moreover, the first end 210 of the thin film coating molecule 208 is bonded to the functional group 204 on the surface 202 of the substrate 200, respectively. Next, as described in step 112, the first end 210 of the thin film coating molecule 208 is bonded to the functional group 204 on the surface 202 of the substrate 200, respectively. Thus, a film 216 can be formed on the surface 202 of the substrate 200.

In some embodiments, when the first end 210 of the thin film coating molecule 208 is bonded to the functional group 204, respectively, the thin film coating molecule 208 can be made by subjecting the substrate 200 to a static treatment or a baking treatment. The functional group 204 on the surface 202 of the substrate 200 undergoes a condensation reaction to dehydrate, thereby completing the bond between the thin film coating molecules 208 and the substrate 200. Thus, the formed film 216 has a very strong adhesion to the surface 202 of the substrate 200.

It is apparent from the above-described embodiments that the film manufacturing method of the present invention can effectively, uniformly and densely coat a film coating on the surface of a substrate to be treated.

According to the above embodiments, another advantage of the present invention is that the film manufacturing method of the present invention can adjust the amount of the film coating to be used according to the size of the surface to be coated of the substrate, thereby greatly reducing the waste of the film coating.

While the present invention has been described above by way of example, it is not intended to be construed as a limitation of the scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100. . . method

102. . . step

104. . . step

106. . . step

108. . . step

110. . . step

112. . . step

200. . . Substrate

202. . . surface

204. . . Functional group

206. . . Liquid film

208. . . Film coating molecule

210. . . First end

212. . . Second end

214. . . Hydrophilic group

216. . . film

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

1 is a flow chart showing a method of manufacturing a film according to an embodiment of the present invention.

2A to 2D are cross-sectional views showing a process of manufacturing a film according to an embodiment of the present invention.

100. . . method

102. . . step

104. . . step

106. . . step

108. . . step

110. . . step

112. . . step

Claims (15)

A method for manufacturing a film, comprising: providing a substrate; performing an activation treatment on a surface of the substrate to form a plurality of functional groups on the surface of the substrate; forming a liquid film covering the substrate Forming a film coating solution on a surface of the liquid film, wherein the film coating solution comprises a plurality of film coating molecules, and each of the film coating molecules comprises a first end and a reaction with the liquid film a second end, the first ends are dissolved in the surface of the liquid film; the liquid film is volatilized to lower the first ends to the surface of the substrate; and the first ends are respectively associated with the A functional group is bonded to form the film on the surface of the substrate. The method of producing a film according to claim 1, wherein each of the first ends comprises a hydrophilic group, and each of the second ends comprises a hydrophobic group. The method of producing a film according to claim 1, wherein the step of performing the activation treatment comprises using a plasma. The method of producing a film according to claim 1, wherein the step of performing the activation treatment comprises using a chemical agent. The method for producing a film according to claim 1, wherein the liquid film comprises a solution, and the solution comprises water, alcohols, ketones, polar molecular liquids or a mixture thereof. The method of producing a film according to claim 5, wherein the solution further comprises a non-polar liquid molecular additive. The method for producing a film according to claim 1, wherein the step of forming the liquid film is performed by a wetting method, a spray coating method, a spray method, a vapor method or a brush coating method. The method for producing a film according to claim 1, wherein the step of introducing the film coating solution is a droplet method, a droplet approach method, a spray method, a vapor method or a spray method. The method for producing a film according to claim 1, wherein the thin film coating molecules comprise a plurality of antifouling coating molecules, and each of the antifouling coating molecules comprises a mono-alkane (Si-R) functional group. A fluorocarbon that reacts with water to form a hydrazine-hydroxy (Si-OH) functional group. The method for producing a film according to claim 9, wherein the film coating solution further comprises a solvent, and the solvent comprises a fluoride component, an alcohol, an alcohol compound, a ketone, a ketone compound, an ether, and an ether compound. . The method for producing a film according to claim 9, wherein the film coating molecules comprise a fluorocarbon hydrocarbon compound, a perfluorocarbon hydrocarbon compound, a fluorocarbon hydrocarbon compound, a perfluorodecane hydrocarbon compound, and a perfluorocarbon. A decane hydrocarbon compound, a chlorine-containing perfluorodecane hydrocarbon compound, or a chlorine-containing perfluorodecane hydrocarbon compound. The method for producing a film according to claim 1, wherein the step of volatilizing the liquid film comprises performing a heat treatment to accelerate a volatilization rate of the liquid film. The method for producing a film according to claim 1, wherein the step of bonding the first ends to the functional groups separately comprises performing a standing treatment. The method for producing a film according to claim 1, wherein the step of bonding the first ends to the functional groups separately comprises performing a baking treatment. The method of producing a film according to claim 1, wherein the functional groups comprise a plurality of hydrogenoxy functional groups, a plurality of nitrogen hydrogen functional groups, a hydrogen containing tubular group, and/or a plurality of floating bonds.