JP2020095238A - Method of manufacturing led display with enhanced adhesion - Google Patents

Abstract

To provide a method of manufacturing an LED display with improved insulation and durability properties as well as adhesive property.SOLUTION: A method of manufacturing an LED display comprises: a substrate preparation step of preparing a substrate having a plurality of LED elements; an insulation layer forming step of forming an insulation layer by coating a surface of the substrate with an insulation agent having silicon as an active ingredient at a position slightly lower than height of the LED elements; an insulation panel stacking step of stacking insulation panels each having a through hole on a position corresponding to a position of the LED elements, on an upper surface of the insulation layer, where the insulation panel consists of any one of polycarbonate and polyethylene terephthalate (PET); a coating layer forming step of forming a coating layer by coating upper surfaces of the insulation panels and the LED elements with a coating agent including raw material containing silicon as an active ingredient; and an adhesive layer forming step of forming an adhesive layer by coating a bottom of the substrate with an adhesive agent containing a silane-based compound as an active ingredient, spin-coating the same, and hardening the same at 70 to 90°C for 12 to 30 hours.SELECTED DRAWING: Figure 1

Description

The present invention relates to a method of manufacturing an LED display having enhanced adhesion, and more specifically, it can be applied to a substrate by applying an adhesive and a coating agent containing silicone as an active ingredient and can be attached to a wall while insulating. The present invention relates to a method of manufacturing a LED display having enhanced adhesiveness and adhesiveness.

The display device is a device that represents information for visual and three-dimensional reception and storage/delivery, and in the modern society, a display is manufactured using LEDs.
LEDs are semiconductor elements that emit light when a voltage is applied. They have a longer life than incandescent lamps and can express a variety of colors, so the fact is that we are producing lighting and displays for landscapes that use them. Is.

In related art below, which is related art, in Patent Document 1 below, by using a laminated PCB (Printed Circuit Board) instead of using a braided copper wire and a heat sink (heat sink), The power supply PCB can be used as a power supply and heat sink by using a thick copper plate, and the bending shape can be freely set, the manufacturing process can be automated, and the power supply can be transmitted to a long distance. It is possible to easily fix by inserting the fixing member into the fixing hole without the device described above, and the flexible LED bar can be connected to the power supply PCB which is the lower plate without being connected by the top plate.
However, since the above invention cannot be mounted on a wall or the like, it cannot be used in various environments, and there is no separate structure for protecting the surface of the device, resulting in weak durability.

As another prior art, in Patent Document 2 below, a semiconductor light emitting layer is formed between a substrate and a lower portion of the substrate, and emits light by separating into at least one or more unit modules. It shows a configuration including a protective film layer formed in a separated space to protect the semiconductor light emitting layer.
The above-mentioned invention proposes a structure for providing a semiconductor light emitting device with improved light extraction, which prevents a decrease in yield due to chip damage that occurs during wafer bonding of the light emitting device.
The above invention has the advantage of improving durability through the protective film layer, but has the disadvantage of insufficient insulation.
Therefore, in order to solve the above problems, it is necessary to develop an LED display having adhesiveness and improved insulation and durability.

Korean Registered Patent No. 10-1440455 Korean Registered Patent No. 10-0786802

The present invention has been devised in order to overcome the problems of the above-described technique, and forms an adhesion layer on the bottom surface of a substrate, and an insulating agent containing silicone as an active ingredient and a polycarbonate or polyethylene on the surface of the substrate. It is an object to manufacture an LED display with an insulating panel made of terephthalate (PET).
Another object of the present invention is to produce an insulating agent containing silicone as an active ingredient and having improved insulating properties.
Another object of the present invention is to prepare a coating agent that mixes silicone and ceramic material to protect the surface of LED display.

In order to achieve the above object, a method of manufacturing an LED display with enhanced adhesion according to the present invention comprises a substrate preparing step of preparing a substrate having a plurality of LED elements, and the substrate slightly lower than the height of the LED elements. The step of forming an insulating layer by applying an insulating agent containing silicone as an active ingredient on the surface of the, and one made of either polycarbonate or PET, and penetrating at a position corresponding to the position of the LED element. An insulating panel laminating step of laminating an insulating panel having holes formed on the upper surface of the insulating layer, and a coating layer by applying a coating agent containing a raw material containing silicone as an active ingredient on the upper surface of the insulating panel and the LED element. And a coating layer forming step of forming a coating layer, a coating agent containing a silane (Silane)-based compound as an active ingredient is applied to the bottom surface of the substrate, spin-coated, and cured at 70 to 90°C for 12 to 30 hours. An adhesion layer forming step of forming an adhesion layer.

Further, the above-mentioned adhesive is characterized by having a degassing degree of 0.5 to 2%.
Further, in the step of producing the above-mentioned adhesive, the total weight ratio of the silane mixed solution is such that after mixing 5 to 20% by weight of the silane compound and 80 to 95% by weight of ethanol, the mixture is stirred for 12 to 30 hours to mix the silane. The method is characterized by including a silane mixed solution producing step of producing a liquid and a bubble removing step of defoaming the silane mixed solution under vacuum for 1 to 5 hours.
In addition, the insulating agent is characterized in that the temperature applied to the surface of the substrate is 10 to 30° C. and the viscosity is 20000 to 30,000 cP.

The method for manufacturing an LED display with enhanced adhesion according to the present invention has the following effects. That is,
(1) The LED display can be easily mounted anywhere through the adhesive layer.
(2) The insulation is improved to prevent the LED display from breakdown, and
(3) The durability of the LED display is improved by applying the coating agent.

It is an oblique view showing the appearance of the LED display of the present invention. It is sectional drawing which shows the concrete structure of the LED display of this invention. 3 is a flowchart showing an overall process of manufacturing the LED display of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings are not drawn to scale, and thus the same reference numbers in each drawing refer to the same elements.
FIG. 1 is an oblique view showing the appearance of an LED display of the present invention, FIG. 2 is a sectional view showing a specific structure of the LED display of the present invention, and FIG. 3 is an LED display of the present invention. 3 is a flowchart showing an overall process for manufacturing the.

The method for manufacturing the LED display (10) with enhanced adhesion according to the present invention is basically a substrate preparing step (S100), an insulating layer forming step (S200), an insulating panel laminating step (S300), and a coating layer forming step. (S400) and an adhesion layer forming step (S500).
First, in the board preparation step (S100), a board (100) having a plurality of LED elements (110) is prepared. In this case, the board (100) is a PCB, fPCB (flexible PCB), or the like. There is an advantage that the manufacturing cost can be reduced by using this for the substrate (100).

Next, in the insulating layer forming step (200), an insulating agent having silicone as an active ingredient is applied to the surface of the substrate slightly lower than the height of the LED element (110) to form an insulating layer. By forming 200), electricity can be prevented from passing between the LED elements 110. At this time, as shown in FIG. 2, an insulating agent is applied to form an insulating layer (200) which is slightly lower than the height of the LED element (110) (by the thickness of an insulating panel described later), and is described later. Insulation panels (300) are stacked.

Thereafter, in the insulating panel stacking step (S300), the insulating panel having the through holes (310) formed at the positions corresponding to the positions of the LED elements (110) is assumed to be made from either polycarbonate or PET. This is a step of stacking 300) on the upper surface of the insulating layer (200).
At that time, the insulating panel (300), like the above-mentioned insulating layer (200), functions to prevent a short circuit between the LED elements (110), and further enhances the insulating property of the LED display (10) of the present invention. Provide the function to do.
At this time, by stacking the insulating panel (300) on the upper surface of the insulating layer (200), the insulating panel (300) and the LED element (110) can have the same height as shown in FIG.

Next, in the coating layer forming step (S400), a coating agent containing a raw material containing silicone as an active ingredient is applied to the upper surfaces of the insulating panel (300) and the LED element (110) to form the coating layer (400). The coating layer (400) protects the LED element (110) and the insulating panel (300), and also has the function of maintaining the visibility of the LED display (10) by applying a transparent coating agent. provide.

Finally, in the adhesion layer forming step (S500), an adhesive having a silane compound as an active ingredient is applied to the bottom surface of the substrate (100), spin-coated and cured at 70 to 90°C for 12 to 30 hours. This is a step of forming the adhesion layer (500). At this time, the adhesion layer (500) is formed on the bottom surface of the substrate (100) as shown in FIG. 2, and the LED display (10) of the present invention is attached to a wall or the like by the adhesion layer (500). It becomes possible to attach it.
The adhesive used for the adhesion layer 500 is manufactured to have an out-gassing degree of 0.5-2%. The degree of degassing means the degree to which the atoms and molecules distributed inside the material in a high vacuum state are released as a gas. Specifically, the adhesiveness of silicone may vary depending on the degree of degassing, but if the degree of degassing of the adhesive is less than 0.5% or exceeds 2%, the adhesive strength of the adhesive will decrease, so It is preferable that the temper is 0.5% to 2%.

In addition, although a process of manufacturing the adhesive having enhanced adhesion may be separately performed, the manufacturing of the adhesive may include a silane mixed liquid manufacturing process and a bubble removing process.
First, in the manufacturing step of the silane mixed solution, after mixing 5 to 20% by weight of the silane compound and 80 to 95% by weight of ethanol as a weight ratio of the entire silane mixed solution, the mixture is stirred for 12 to 30 hours to mix the silane. This is a step of producing a liquid, and is a step of producing a silane mixed solution by mixing ethanol as a solvent with a silane-based compound (for example, PDMS, Polydiorganosiloxane, etc.) that imparts adhesiveness.

Thereafter, the bubble removing step is a step of defoaming the silane mixed solution under vacuum for about 1 to 5 hours, and is a step for removing bubbles generated during the production of the silane mixed solution.
The insulating agent of the present invention contains silicone as an active ingredient, and in order to provide an excellent insulating function, the temperature when applied to the surface of the substrate (100) is 10 to 30° C., and the viscosity is Those of 20000-30000cP (centipoise) are available.
It also considers changes in the mobility of electrons and ions of silicone depending on temperature and viscosity. At this time, if the coating temperature is lower than 10°C or higher than 30°C, the insulating property of the insulating agent is significantly reduced.
If the viscosity of the insulating agent is less than 20000 cP, the insulating property of the insulating agent may be reduced, and if it exceeds 30,000 cP, the application of the insulating agent may be difficult.

The coating agent of the present invention can protect the LED device (110) and the insulation panel (300) from the external environment and maximize the insulation function of the LED display (10). The steps of manufacturing such a coating agent include a first solution manufacturing step, a second solution manufacturing step, a bubble removing step, and a cleaning step.
First, in the first solution manufacturing step, the weight ratio of the entire first solution is 30 to 60% by weight of polyurethane acrylate (Polyurethane acrylate), 15 to 50% by weight of hexanediol diacrylate, and 15 to 50% by weight of trimethylolpropane triacrylate. This is a step of mixing ˜40% by weight to produce the first solution.
This is a process of manufacturing an organic material of a coating agent by mixing an ultraviolet curable oligomer and a polyfunctional monomer.

Next, in the second solution manufacturing step, the first solution 30 to 50% by weight, the raw material 30 to 50% by weight, and HCPK (Hydoxy Cyclohexyl Phenyl Ketone) 1 to 10% by weight are mixed as a weight ratio of the entire second solution. After that, it is a step of manufacturing the second solution by stirring for 5 to 10 hours.
At this time, the raw material contains silicone as an active ingredient, and the function of protecting the LED display (10) of the present invention can be performed due to the property of blocking oil and water. A detailed description of these raw materials will be given later.
In addition, HCPK acts as a photopolymerization initiator, so that the coating agent is cured by ultraviolet rays. Accordingly, in the coating layer forming step (S400), the above coating agent is applied to the upper surfaces of the insulating panel (300) and the LED element (110), spin-coated, and then irradiated with ultraviolet rays for 1 to 5 minutes. The coating layer (400) can be formed.

Then, the bubble removal step is a step of removing the bubbles by ultrasonically cleaning the second solution at 40 to 60° C. for 10 to 60 minutes and then leaving it at room temperature for 10 to 60 minutes.
Finally, the washing step is a step of ultrasonically washing the second solution from which air bubbles have been removed with methanol, thereby completing the coating agent.
The procedure for producing the above-mentioned raw material will be described in detail. The steps of producing the raw material containing silicone as an active ingredient include a first intermediate solution producing step, a second intermediate solution producing step, a third intermediate solution producing step and a vacuum distillation step. Including.

First, in the first intermediate solution manufacturing step, as a weight ratio of the first intermediate solution, 1 to 10% by weight of silicon dioxide, 5 to 15% by weight of methanol, and 80 to 90% by weight of isopropyl alcohol are mixed to prepare a first intermediate solution. This is a manufacturing process.
At this time, colloidal silica is generated by mixing silicon dioxide and methanol, and the first intermediate solution can be manufactured by mixing with isopropyl alcohol which is a solvent.

Thereafter, in the second intermediate solution manufacturing step, as a weight ratio of the entire second intermediate solution, 80 to 95% by weight of the first intermediate solution and 5 to 20% by weight of MPTS (Methacryloxy Propyl Trimethoxy Silane) are mixed, and then 60 to 60%. In this step, the temperature is raised to 90° C. and the mixture is stirred for 1 to 5 hours to produce a second intermediate solution.
At this time, MPTS functions as a silane coupling agent to cross-link the organic substance that is the first solution and the inorganic substance that is the first intermediate solution.

Next, in the third intermediate solution manufacturing step, after cooling the second intermediate solution at room temperature, the weight ratio of the entire third intermediate solution is 80 to 95% by weight of the second intermediate solution and hexanediol diacrylate ( Hexanedioldiacrylate) 5 to 20% by weight is mixed to produce a third intermediate solution.
At this time, hexanediol diacrylate functions as a diluent to dilute the second intermediate solution.
Finally, the vacuum distillation step is a step of vacuum-distilling the third intermediate solution at 60 to 80° C., thereby removing the solvent and byproducts of the third intermediate solution to complete the raw material.

In order to further improve the physical properties of the coating agent, in the coating layer forming step (S400), a mixed coating agent containing a mixed raw material containing silicone and a ceramic material as an active ingredient is added to the insulating panel (300) and the LED. The mixed coating layer (400) can be formed by coating on the upper surface of the device (110).
At this time, the mixed coating agent is manufactured by mixing organic and inorganic silicone and ceramic materials, which increases the light weight, ductility, elasticity and moldability of organic polymer and the strength, heat resistance and stability of inorganic ceramics. Therefore, it is possible to exhibit more excellent functionality.
The step of manufacturing the mixed coating agent may include a mixed solution manufacturing step, a bubble removing step, and an ultrasonic cleaning step.

First, in the mixed solution manufacturing step, after mixing 1 to 10% by weight of silicon dioxide, 5 to 15% by weight of methanol, 80 to 90% by weight of isopropyl alcohol, and 1 to 5% by weight of ceramic material as a weight ratio of the entire mixed solution. It is a step of producing a mixed solution by stirring for 1 to 6 hours.
It is a preparatory step for adding a ceramic material to the above-mentioned first intermediate solution and mixing it to manufacture a mixed coating agent having enhanced functionality.

Finally, the bubble removing step is a step of removing bubbles generated in the mixed solution by removing bubbles from the mixed solution under vacuum at 30 to 60° C. for 1 to 5 hours.
Finally, the ultrasonic cleaning step is a step of ultrasonically cleaning the mixed solution from which bubbles have been removed with methanol for 1 to 10 minutes, thereby completing the mixed coating agent.
At this time, the ceramic material, which is one of the active ingredients of the mixed coating agent, will be described in detail. As the ceramic material contains kaolin, sepiolite, and bentonite, it has a very large surface area and a large cation exchange capacity, and it can be used as an adsorbent. It is also often used to provide the function of improving the physical properties of mixed coating agents by the characteristics of ceramics.

The steps of manufacturing such a ceramic material include a primary mixture manufacturing step, a secondary mixture acquisition step, and a drying step.
First, in the primary mixture manufacturing step, as a weight ratio of the entire primary mixture, 0.1 to 10% by weight of ceramic powder consisting of 85 to 95% by weight of water, 1 to 10% by weight of surfactant, and bentonite, kaolin, or sephiolite. % At 70 to 90° C. for 10 to 20 hours to produce a primary mixture.

This is a process of mixing water, which is a solvent, with the ceramic powder, and at this time, a surfactant can be added to enhance the mixing property of the ceramic powder. Here, the surfactant may be montmorillonite containing sodium cation, and not only enhances the mixing property of the ceramic powder and water due to hydrophilicity, but also improves the mixing property with the polymer organic substance manufactured through the procedure described below. Mixability can also be improved.

Next, the secondary mixture acquisition step is a step of centrifuging the primary mixture to obtain the secondary mixture. The upper layer liquid is removed by centrifugation and the sink residue is separated to obtain the secondary mixture. It is a process.
Thereafter, the drying step is a step of drying the secondary mixture under vacuum at 50 to 80° C. for 10 to 30 hours, and is a step of removing the solvent in the secondary mixture to obtain a ceramic material.
In addition to the above-mentioned drying step, it is necessary to stir the ceramic material in the reactor in order to improve the functionality of the ceramic material. Therefore, after the drying step, the primary solution manufacturing step, the secondary solution manufacturing step, Agitation is required in each of the third solution manufacturing step, the fourth solution manufacturing step, the fifth solution manufacturing step, and the filter washing step.

First, in the primary solution manufacturing step, isophorone diisocyanate (50 to 70% by weight) and 1,4-dioxane (30 to 50% by weight) were used in a nitrogen atmosphere as a weight ratio of the entire primary solution. It is a step of producing a primary solution by stirring for 1 to 30 minutes.
Isophorone diisocyanate and 1,4-dioxane then perform the function of providing the reactor applied to the ceramic material described above.

Next, in the secondary solution manufacturing stage, as a weight ratio of the entire secondary solution, 50-70% by weight of hydroxyethyl acrylate, 20-40% by weight of 1,4-dioxane, and dibutyltin dilaurate are used. In this step, 0.1 to 10% by weight and 0.1 to 10% by weight of hydroxyanisole are mixed to prepare a secondary solution.
At this time, hydroxyethyl acrylate and 1,4-dioxane perform the function of providing a reactor applied to the above-mentioned ceramic material, and the ceramic material produced thereby has excellent gas barrier properties.
In addition, dibutyltin dilaurate and hydroxyanisole function as catalysts, and provide a function of promoting the mixed reaction rate of the primary solution and the secondary solution described later.

Thereafter, in the step of preparing the third solution, 50 to 80% by weight of the first solution and 20 to 50% by weight of the second solution are stirred at 30 to 50° C. for 1 to 6 hours, based on the total weight of the third solution, This is a step of producing a tertiary solution.
That is, a mixed solution of isophorone diisocyanate and hydroxyethyl acrylate can be manufactured by mixing the primary solution and the secondary solution.

Next, in the quaternary solution manufacturing step, 10 to 30 wt% of the dried secondary mixture and 70 to 90 wt% of toluene are mixed as a weight ratio of the quaternary solution to manufacture a quaternary solution. This is a step of mixing the above-mentioned secondary mixture with toluene as a solvent to produce a quaternary solution.
Then, in the 5th solution manufacturing step, the weight ratio of the 5th solution is 20-40% by weight of the 3rd solution and 60-80% by weight of the 4th solution at 50-80°C for 30-60 hours. A step of producing a fifth solution by stirring, and a step of applying a reactor of isophorone diisocyanate and hydroxyethyl acrylate contained in the third solution to the ceramic material to produce a ceramic material having improved functionality. ..

Finally, the filtration washing step is a step of washing the residue obtained by filtering the fifth solution with toluene 1 to 5 times, and washing the residue with toluene to remove the unreacted material. Can be obtained.
The ceramic material manufactured through the above process has the function of improving the hardness of the surface of the LED display 10, reducing gas permeation, and improving the durability of the LED display 10.

As described above, the structure and operation of the method for manufacturing an LED display with enhanced adhesiveness according to the present invention are expressed in the above description and drawings, but this is merely an example, and the technique of the present invention. Of course, the technical idea is not limited to the above description and drawings, and it is needless to say that various changes and modifications can be made without departing from the technical idea of the present invention.

10: LED display
100: Substrate
110: LED element
200: Insulation layer
300: Insulation panel
310: Through hole
400: coating layer
500: Adhesion layer
S100: Substrate preparation stage
S200: Insulation layer formation stage
S300: Insulation panel stacking stage
S400: Coating layer formation stage
S500: Adhesive layer formation stage

Claims (10)

A method of manufacturing an LED display having enhanced adhesion, comprising:
A substrate preparation step of preparing a substrate provided with a plurality of LED elements;
An insulating layer forming step of forming an insulating layer by applying an insulating agent containing silicone as an active ingredient on the surface of the substrate, which is slightly lower than the height of the LED element;
An insulating panel laminating step of laminating, on the upper surface of the insulating layer, an insulating panel made of either polycarbonate or PET and having through holes formed at positions corresponding to the positions of the LED elements;
A coating layer forming step of applying a coating agent containing a raw material containing silicone as an active ingredient to form a coating layer on the upper surfaces of the panel and the LED element;
An adhesion layer forming step of forming an adhesion layer by curing the adhesion agent having a silane compound as an active ingredient on the bottom surface of the substrate and then spin-coating it at 70 to 90° C. for 12 to 30 hours,
A method of manufacturing an LED display with enhanced adhesion, comprising: The method of claim 1, wherein the adhesive has a degassing degree of 0.5 to 2%. The step of manufacturing the adhesive includes
As a weight ratio of the silane mixture as a whole, after mixing 5 to 20% by weight of the silane compound and 80 to 95% by weight of ethanol, the mixture is stirred for 12 to 30 hours to produce a silane mixed solution, and a silane mixed solution producing step,
A bubble removal step of defoaming the silane mixture under vacuum for 1 to 5 hours;
The method for manufacturing an LED display with enhanced adhesion according to claim 1, comprising: The method of claim 1, wherein the insulating agent is applied to the surface of the substrate at a temperature of 10 to 30° C. and has a viscosity of 20,000 to 30,000 cP. The step of manufacturing the coating agent includes
The first solution is prepared by mixing 30 to 60 wt% of polyurethane acrylate, 15 to 50 wt% of hexanediol diacrylate, and 15 to 40 wt% of trimethylolpropane triacrylate as a weight ratio of the entire first solution. Solution manufacturing stage,
As a weight ratio of the second solution as a whole, after mixing 30 to 50% by weight of the first solution, 30 to 50% by weight of raw material, and 1 to 10% by weight of HCPK (Hydroxy Cyclohexyl Phenyl Ketone), the mixture is stirred for 5 to 10 hours. And a second solution is produced to produce a second solution,
Ultrasonic cleaning the second solution at 40 to 60° C. for 10 to 60 minutes, and then leaving it at room temperature for 10 to 60 minutes to remove air bubbles;
A cleaning step of ultrasonically cleaning the second solution from which air bubbles have been removed with methanol,
The step of forming the coating layer includes
The adhesive property of claim 1, wherein the coating agent is applied to the upper surface of the insulating panel and the LED device, spin-coated, and then irradiated with ultraviolet rays for 1 to 5 minutes to form a coating layer. Manufacturing method of LED display fortified. The step of manufacturing the raw material includes
As a weight ratio of the entire first intermediate solution, 1 to 10% by weight of silicon dioxide, 5 to 15% by weight of methanol, and 80 to 90% by weight of isopropyl alcohol are mixed to produce a first intermediate solution. When,
As a weight ratio of the second intermediate solution as a whole, 80 to 95% by weight of the first intermediate solution and 5 to 20% by weight of MPTS (Methacryloxy Propyl Trimethoxysilane) were mixed, and the temperature was raised to 60 to 90°C to 1 to 5%. A second intermediate solution production step of producing a second intermediate solution by stirring for a period of time;
After cooling the second intermediate solution at room temperature, the second intermediate solution is mixed with 80 to 95% by weight and Hexanedioldiacrylate 5 to 20% by weight as a weight ratio of the entire third intermediate solution. A third intermediate solution producing step of producing a third intermediate solution,
The method according to claim 5, wherein the third intermediate solution is vacuum-distilled at 60 to 80° C., and the vacuum distillation step is performed. The coating layer forming step includes
The adhesive property according to claim 1, wherein a mixed coating agent containing a mixed raw material containing silicone and a ceramic material as active ingredients is applied to the upper surfaces of the insulating panel and the LED element to form a mixed coating layer. Manufacturing method of LED display fortified. The step of manufacturing the mixed coating agent includes
As a weight ratio of the entire mixed solution, 1 to 10% by weight of silicon dioxide, 5 to 15% by weight of methanol, 80 to 90% by weight of isopropyl alcohol, and 1 to 5% by weight of ceramic material are mixed, and then stirred for 1 to 6 hours. A mixed solution manufacturing step of manufacturing a mixed solution by
A bubble removing step of removing bubbles from the mixed solution under vacuum at 30 to 60° C. for 1 to 5 hours;
An ultrasonic cleaning step of ultrasonically cleaning the mixed solution from which air bubbles have been removed with methanol for 1 to 10 minutes,
The method for manufacturing an LED display with enhanced adhesion according to claim 7, comprising: The steps of manufacturing the ceramic material include
As a weight ratio of the entire primary mixture, 85 to 95% by weight of water, 1 to 10% by weight of a surfactant, and 0.1 to 10% by weight of a ceramic powder composed of bentonite, kaolin or sephiolite at 70 to 90°C and 10 to 10% by weight. A primary mixture production step of producing a primary mixture by mixing for 20 hours,
A secondary mixture acquisition step of centrifuging the primary mixture to obtain a secondary mixture;
A drying step of drying the secondary mixture under vacuum at 50-80° C. for 10-30 hours;
The method for manufacturing an LED display with enhanced adhesion according to claim 8, further comprising: After the drying step,
Isophorone diisocyanate (50 to 70% by weight) and 1,4-dioxane (30 to 50% by weight) were stirred under a nitrogen atmosphere for 1 to 30 minutes as a weight ratio of the entire primary solution. A primary solution manufacturing step of manufacturing a primary solution,
The weight ratio of the entire secondary solution is 50-70% by weight of hydroxyethyl acrylate, 20-40% by weight of 1,4-dioxane, 0.1-10% by weight of dibutyltin dilaurate, 0.1% by weight of hydroxyanisole. A secondary solution manufacturing step of manufacturing a secondary solution by mixing about 10% by weight;
As a weight ratio of the entire tertiary solution, the primary solution of 50 to 80% by weight and the secondary solution of 20 to 50% by weight are stirred at 30 to 50° C. for 1 to 6 hours to produce a tertiary solution. Next solution manufacturing stage,
A quaternary solution manufacturing step of manufacturing a quaternary solution by mixing 10 to 30 wt% of the dried secondary mixture and 70 to 90 wt% of toluene as a weight ratio of the quaternary solution.
As a weight ratio of the fifth solution as a whole, the third solution 20 to 40% by weight and the fourth solution 60 to 80% by weight are stirred at 50 to 80° C. for 30 to 60 hours to prepare a fifth solution. Solution manufacturing stage,
The method of claim 9, wherein the residue obtained by filtering the quintic solution is washed with toluene 1 to 5 times. Production method.