KR20190089417A - Device of manufacturing electrode and method of manufacturing electrode - Google Patents

Abstract

The present invention relates to an electrode manufacturing apparatus and an electrode manufacturing apparatus. In particular, the present invention relates to an apparatus and method for manufacturing an electrode catalyst layer for a fuel cell. The electrode manufacturing apparatus comprises: an object supply unit; an electrode recovery unit; an electrode formation unit; an adhesive film supply unit; an adhesive film recovery unit; a first pressing roll; and a second pressing roll. The electrode manufactured by the method can form a stable edge region to enhance the quality of a membrane-electrode assembly.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrode manufacturing apparatus,

TECHNICAL FIELD The present invention relates to an electrode manufacturing apparatus and an electrode manufacturing method. More specifically, the present invention relates to an apparatus and a method for manufacturing an electrode catalyst layer for a fuel cell.

Recently, as energy resources such as oil and coal are predicted to be exhausted, there is an increasing need for energy that can replace them. Interest in fuel cells, metal secondary batteries, and flow batteries is becoming an alternative energy source.

As one of such alternative energies, fuel cells are highly efficient, do not emit pollutants such as NOx and SOx, are enriched with fuel, and related researches are actively proceeding.

FIG. 1 schematically shows an electricity generating principle of a fuel cell. In a fuel cell, the most basic unit for generating electricity is a membrane electrode assembly (MEA), which includes an electrolyte membrane M and an electrolyte membrane M, And an anode (A) and a cathode (C) formed on both sides of the cathode (C). Referring to Fig. Showing the electricity generating principle of a fuel cell 1, an anode (A) in the hydrogen or methanol, butane and the oxidation of the fuel (F) of the hydrocarbon and so on up the hydrogen ions (H ⁺⁾ and electron (e ^-), such as And the hydrogen ions move to the cathode C through the electrolyte membrane M. In the cathode (C), the hydrogen ions transferred through the electrolyte membrane (M) react with the oxidizing agent (O) such as oxygen, and water (W) is produced. This reaction causes electrons to migrate to the external circuit.

Korean Patent Laid-Open Publication No. 2015-0060599 (published on June, 2013)

The specification intends to provide an electrode manufacturing apparatus and an electrode manufacturing method. Specifically, this specification intends to provide an apparatus and a method for manufacturing an electrode catalyst layer for a fuel cell.

A coating material supply unit; An electrode recovery unit; An electrode forming unit for forming at least two polygonal electrodes including a center region and a rim region on a coating material to be passed from the coating material supply unit to the electrode collection unit; Providing an adhesive film having an adhesive layer having an adhesive region and a non-adhesive region on a substrate so that the adhesive region is in contact with an edge region of the upper surface of the polygonal electrode; An adhesive film collecting unit for collecting the adhesive film; A first pressure roll provided on a side opposite to a side of the pressure sensitive adhesive film that is provided with the pressure sensitive adhesive layer from the pressure sensitive adhesive film feeder to the pressure sensitive adhesive film recovery section; And a second pressing roll which is provided on the opposite side of the surface of the coated body on which the polygonal electrode is provided and faces the first pressing roll, the width of the edge region of the upper surface of the polygonal electrode is smaller than the width of the polygonal electrode Wherein at least one of the first pressing roll and the second pressing roll has a groove portion corresponding to the size of the polygonal electrode.

The present invention also relates to a method of manufacturing a semiconductor device, comprising: forming two or more polygonal electrodes spaced apart from each other on a coating body, Disposing an adhesive film having an adhesive layer having an adhesive region and a non-adhesive region on a substrate such that the adhesive region is in contact with an edge region of an upper surface of the polygonal electrode; Pressing the adhesive film except the non-adhesive region using a pressing roll having a groove portion corresponding to the size of the polygonal electrode; And removing the adhesive film to recover the polygonal electrode.

The electrode manufactured by the manufacturing apparatus and the manufacturing method according to the present invention has an effect of improving the quality of manufacturing the membrane electrode assembly by forming a stable edge region.

1 is a schematic view showing an electricity generation principle of a fuel cell.
2 is a schematic view showing the structure of a membrane electrode assembly for a fuel cell.
3 is a schematic view showing one embodiment of a fuel cell.
4 is a schematic view of an electrode manufacturing apparatus according to the present invention.
5 is a view showing a center region and a border region of the polygonal electrode according to the present invention.
6 is a view showing a tackifier film providing unit according to the present invention.
7 is a view showing a structure of a pressure-sensitive adhesive film according to the present invention.
8 is a view showing a structure in which an adhesive film is provided on a border region of an upper surface of a polygonal electrode according to the present invention.
9 is a view showing a press roll according to the present invention.
10 is a view showing a pressure application area by a press roll according to the present specification.
11 is a photograph showing an electrode edge portion manufactured according to the first embodiment of the present invention.
12 is a photograph showing an electrode edge portion manufactured according to Comparative Example 1 of this specification.
13 is a photograph showing an electrode edge portion manufactured according to Comparative Example 2 of this specification.

Hereinafter, the present invention will be described in detail.

[Electrode Manufacturing Apparatus]

The present invention relates to a coating material supply apparatus, An electrode recovery unit; An electrode forming portion; An adhesive film supplier; An adhesive film recovery unit; A first press roll; And an electrode manufacturing apparatus including the second pressing roll. Fig. 4 schematically shows an electrode manufacturing apparatus according to the present invention.

[Coating material supply / electrode recovery unit]

The material to be coated and the electrode collecting part are not particularly limited in structure, material, form and the like as long as they can provide the coated body and recover the manufactured electrode, and those generally used in the art can be employed .

In one embodiment of the present invention, the coating material is kept tensioned by the coating material supply unit and the electrode recovery unit, and can be continuously supplied. For example, the coating material supply unit and the electrode collection unit are each an unwinder and an electrode winding unit, and the coating material winding unit and the electrode winding unit are continuously rotated so that the coating material is continuous As shown in FIG.

In one embodiment of the present invention, the coating material can be intermittently and continuously supplied by the coating material supply unit and the electrode collection unit. In this case, the intermittent continuous means that the coating material is supplied while repeating the supply of the coating material at a time interval for a while for a while and continuously supplying the coating material. For example, when the coating material is supplied to the coating area, the coating material is continuously supplied, and when the coating material is coated, the supply of the coating material can be stopped for precise coating.

The material to be coated is not particularly limited as long as it can be moved by a roll, but it may be a flexible substrate such as a plastic. Specifically, it may be a fluorine-based film such as PTFE, PEP, PFA, PEN, PET or PI film.

[Electrode Forming Part]

The electrode forming unit is disposed between the coating material supplying unit and the electrode collecting unit and includes at least two polygonal electrodes including a center area and a rim area on a coating material that proceeds from the coating material supply unit to the electrode collecting unit, Can be formed.

The electrode forming unit may include an electrode coating unit for coating two or more polygonal electrodes on the coated body and coating the coated polygonal electrode, and an electrode hardening unit for curing the coated polygonal electrode.

The electrode coating part may form a polygonal electrode using an electrode composition.

The method of forming the polygonal electrode using the electrode composition may be performed by a conventional method known in the art, for example, spray coating, tape casting, screen printing, blade coating comma coating, or die coating And the like can be used.

[Electrode composition]

The electrode composition may be variously applied depending on the type and application of the polygonal electrode. When the polygonal electrode is a catalyst layer for a fuel cell, the electrode composition may include a catalyst, a polymer ionomer, and a solvent.

The catalyst is not particularly limited as long as it can be used as a catalyst for a fuel cell, and a catalyst used in the related art can be employed. For example, the catalyst may comprise metal particles selected from the group consisting of platinum, ruthenium, osmium, platinum-ruthenium alloys, platinum-osmium alloys, platinum-palladium alloys and platinum-transition metal alloys. At this time, the metal particles may be solid particles, hollow metal particles, bowl-shaped particles, core-shell particles, and the like.

The catalysts can be used not only by themselves but also by being supported on a carbon-based carrier.

Examples of the carbon-based material include graphite, carbon black, acetylene black, denka black, cacao black, activated carbon, mesoporous carbon, carbon nanotube, carbon nanofiber, carbon nanohorn, , Carbon nanowires, fullerene (C ₆₀ ), and super P black (Super P black).

As the polymer ionomer, a sulfonated polymer such as a Nafion ionomer or a sulfonated polytrifluorostyrene may be used.

The solvent is not particularly limited, and solvents used in the art can be employed. For example, the solvent may be any one or a mixture of two or more selected from the group consisting of water, butanol, isopropanol, methanol, ethanol, n-propanol, n-butyl acetate, glycerol and ethylene glycol .

[Polygonal Electrode]

The polygonal electrode means a polygonal shape in cross section parallel to a portion in contact with the coating body, and may be a polygonal column shape. Here, the polygon means a shape of a figure surrounded by three or more line segments, and may be in the form of a triangle, a rectangle, a pentagon, a hexagon, a hexagon, an octagon or the like depending on the number of sides. Preferably, the polygonal electrode is a rectangular electrode having four sides. The rectangular electrode may include a rectangular, square, rhombic, or trapezoidal electrode. Preferably, the rectangular electrode is a rectangular electrode.

The opposite surface of the polygonal electrode opposite to the surface in contact with the coating material may include a center region and a border region.

The center region means a region formed apart from the edge of the polygonal electrode, and the edge region means an area located between the edge of the polygonal electrode and the center region. FIG. 5 shows a central region and a border region of the polygonal electrode.

The width (A, A ', A' ', or A' '') of the edge region of the upper surface of the polygonal electrode may be 25% or less, preferably 10% ≪ / RTI >

The width (B or B ') of the central region of the upper surface of the polygonal electrode may be 75% or more, preferably 90% or more of the entire width (C or C') of the polygonal electrode.

In this case, the width A, A ', A' 'and A' '' of the edge region may be the same or different from each other, and the widths B and B 'of the center region may be equal to or different from each other, The total widths C and C 'of the first and second electrodes may be equal to or different from each other.

The polygonal electrode may be a catalyst layer for a fuel cell. The catalyst layer for a fuel cell may be used as at least one of a catalyst layer of the anode and a catalyst layer of the cathode. The oxidation reaction of the fuel occurs in the catalyst layer of the anode, and the reduction reaction of the oxidant occurs in the catalyst layer of the cathode.

In one embodiment of the present invention, the thickness of the cured catalyst layer for a fuel cell may be 3 m or more and 30 m or less, respectively. At this time, the thickness of the catalyst layer of the anode and the thickness of the catalyst layer of the cathode may be the same or different from each other.

[Adhesive film providing / adhesive film collecting part]

An electrode manufacturing apparatus according to an embodiment of the present invention provides an adhesive film having an adhesive layer having an adhesive region and a nonadhesive region on a substrate so that the adhesive region is in contact with the edge region of the upper surface of the polygonal electrode An adhesive film supplier; And an adhesive film recovery unit. Fig. 6 schematically shows the adhesive film supply unit according to the present invention.

The adhesive film supplying unit and the adhesive film collecting unit are not particularly limited in structure, material, form and the like as long as the adhesive film can be provided and recovered, and those generally used in the art can be employed.

In one embodiment of the present invention, the adhesive film supplying unit and the adhesive film collecting unit can continuously supply the adhesive film. For example, the adhesive film supply unit and the adhesive film collecting unit are respectively an adhesive film unwinder and an adhesive film rewinder, and the adhesive film winding unit and the adhesive film winding unit are continuously rotated so that the adhesive film is continuous As shown in FIG.

In one embodiment of the present invention, the adhesive film supplying unit and the adhesive film collecting unit are capable of intermittently and continuously supplying the adhesive film. In this case, the intermittent continuous means that the adhesive film is supplied while repeating the supply of the adhesive film at a time interval for a while for a while and the continuous supply of the adhesive film is repeated. For example, the supply of the adhesive film can be supplied intermittently and continuously in synchronism with the speed of the coating material supplied continuously and intermittently.

[Adhesive film]

In one embodiment of the present invention, the adhesive film is provided and recovered by the adhesive film supply unit and the adhesive film collection unit, and may proceed from the adhesive film supply unit to the adhesive film collection unit.

The adhesive film provided by the adhesive film supply may include a substrate and an adhesive layer having an adhesive region and a non-adhesive region provided on the substrate. In this case, the non-adhesive region corresponds to the shape and size of the central region of the target polygonal electrode, the adhesive region is in contact with the edge region of the target polygonal electrode, and the electrode composition is erroneously coated Or the stains, defects, etc. scattered by the electrode composition can be removed. 8 shows that the adhesive region of the adhesive film is in contact with the edge region of the polygonal electrode.

The type of the substrate used for the adhesive film is not particularly limited, but it may be a PET film.

According to still another embodiment of the present disclosure, the adhesive film provided by the adhesive film provisioning includes a substrate, an adhesive layer having an adhesive region and a non-adhesive region on the substrate, and a release film . ≪ / RTI > 7 shows the structure of the adhesive film containing the release film.

The line width of the adhesive region of the pressure-sensitive adhesive film is not particularly limited as long as the electrode composition is erroneously coated outside the target polygonal electrode, or stains, defects, etc. scattered by the electrode composition can be removed.

[First pressing roll and second pressing roll]

The first pressure roll may be provided on the opposite side of the adhesive film of the adhesive film that advances from the adhesive film dispenser to the adhesive film collecting section.

The second pressing roll may be disposed on the opposite side of the surface of the coating body on which the polygonal electrode is provided, and may be disposed to face the first pressing roll.

At least one of the first pressing roll and the second pressing roll may have a groove corresponding to the central region of the polygonal electrode.

Either one of the first pressing roll and the second pressing roll may have a groove corresponding to the central region of the polygonal electrode. Fig. 9 shows the form of the pressure roll according to the present invention.

Pressure can be applied only to the region except for the central region of the polygonal electrode by the first pressing roll and the second pressing roll, which is shown in FIG.

[Removal of release film]

In the case where the adhesive film provided by the adhesive film supply includes a substrate, an adhesive layer having an adhesive region and a non-adhesive region on the substrate, and a release film provided on the adhesive layer, May further include a release film removing unit positioned between the pressure applying film and the first pressing roll.

[Light irradiation part]

The electrode manufacturing apparatus of the present invention may further include a light irradiation unit positioned between the pressure-sensitive adhesive film supply unit and the first pressure roll.

The light irradiating part may be a white light for discriminating between the coating part and the non-coated part, but the optical vision part is not limited thereto.

 [Electrode Manufacturing Method]

The present invention relates to a method of manufacturing a semiconductor device, comprising: forming two or more polygonal electrodes spaced apart from each other on a coating body, Disposing an adhesive film having an adhesive layer having an adhesive region and a non-adhesive region on a substrate such that the adhesive region is in contact with an edge region of an upper surface of the polygonal electrode; Pressing the adhesive film except for the non-adhesive region using a pressing roll having a groove portion corresponding to the central region of the polygonal electrode; And removing the adhesive film to recover the polygonal electrode.

The above electrode manufacturing method can be referred to the above description of the electrode manufacturing apparatus.

[Polygonal electrode forming step]

The electrode manufacturing method according to the present invention includes forming two or more polygonal electrodes on the coating body at a distance from each other.

The forming of the polygonal electrode may include: coating two or more polygonal electrodes including a center region and a rim region on the coating material; And curing the coated polygonal electrode.

The curing may be performed by heating the coated body coated with the polygonal electrode for 1 minute or more for 30 minutes or less.

The curing step may be a step of curing the coated body coated with the polygonal electrode by applying a temperature of 30 ° C or higher and 50 ° C or lower.

According to another aspect of the present invention, the step of forming the polygonal electrode includes coating at least two polygonal electrodes on the coating member, the polygonal electrode including a center region and a rim region; Drying the coated polygonal electrode; And curing the coated polygonal electrode.

The drying may be performed by heating the coated body coated with the polygonal electrode for 1 minute to 60 minutes.

The curing may be performed by applying a coating material coated with polygonal electrodes at a temperature of 50 ° C or higher and 150 ° C or lower.

[Step of placing adhesive film]

The electrode manufacturing method of the present invention includes the step of disposing an adhesive film having an adhesive layer having an adhesive region and an unadhered region on the substrate such that the adhesive region is in contact with the edge region of the upper surface of the polygonal electrode .

[Pressing step of adhesive film]

The electrode manufacturing method of the present invention includes a step of pressing the adhesive film except for the non-adhesive region using a pressing roll having a groove portion corresponding to the central region of the polygonal electrode.

The pressure to be pressurized by the pressure roll is not particularly limited, but may be 10 kgf / cm 2 to 50 kgf / cm 2 or less.

[Step of removing the adhesive film]

The electrode manufacturing method of the present invention includes the step of removing the adhesive film to recover the polygonal electrode.

The method of removing the adhesive film is not particularly limited, but may be a mechanical peeling method using a pressure-sensitive adhesive film collecting portion.

 [Release film removal step]

When the pressure-sensitive adhesive film provided by the pressure-sensitive adhesive film supply includes a substrate, an adhesive layer having an adhesive region and a non-adhesive region on the substrate, and a release film provided on the adhesive layer, May further include a step of removing the release film of the adhesive film before the step of disposing the adhesive film.

The method for removing the release film is not particularly limited, but may be a mechanical removal method using a release film removing method.

[MEA / Battery]

The present disclosure relates to an anode; Cathode; And an electrolyte membrane disposed between the anode and the cathode, wherein at least one of the anode and the cathode comprises an electrode manufactured by the electrode manufacturing method.

The cathode refers to an electrode that receives electrons when discharged, and may be an anode (oxidation electrode) that is oxidized when charged to emit electrons. The anode refers to an electrode which is oxidized when discharged to emit electrons, and may be a cathode (reduction electrode) that is reduced by receiving electrons when charged.

The electrochemical cell means a cell using a chemical reaction. The type of the electrochemical cell is not particularly limited as long as the polymer electrolyte membrane is provided. For example, the electrochemical cell may be a fuel cell, a metal secondary battery, or a flow cell.

The present invention provides an electrochemical cell module comprising an electrochemical cell as a unit cell.

The electrochemical cell module may be formed by stacking a bipolar plate between unit cells according to one embodiment of the present application.

The battery module may be specifically used as a power source for an electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, or a power storage device.

The present invention provides a membrane electrode assembly including an anode, a cathode, and an electrolyte membrane provided between the anode and the cathode, wherein at least one of the anode and the cathode includes an electrode manufactured by the electrode manufacturing method.

The present specification provides a fuel cell including the membrane electrode assembly.

2 schematically shows a structure of a membrane electrode assembly for a fuel cell, in which a membrane electrode assembly for a fuel cell comprises an electrolyte membrane 10a, a cathode 50a and a cathode 50b which are positioned opposite to each other with the electrolyte membrane 10a interposed therebetween, And an anode 51a. The cathode includes a cathode catalyst layer 20a and a cathode gas diffusion layer 40a successively from an electrolyte membrane 10a and the anode includes an anode catalyst layer 21a and an anode gas diffusion layer 41a sequentially from the electrolyte membrane 10a. .

3 schematically shows the structure of a fuel cell, which includes a stack 60a, an oxidant supply unit 70a, and a fuel supply unit 80a.

The stack 60a includes one or more membrane electrode assemblies described above, and includes a separator interposed therebetween when two or more membrane electrode assemblies are included. The separator serves to prevent the membrane electrode assemblies from being electrically connected and to transfer the fuel and oxidant supplied from the outside to the membrane electrode assembly.

The oxidant supply part 70a serves to supply the oxidant to the stack 60a. As the oxidizing agent, oxygen is typically used, and oxygen or air can be injected into the oxidizing agent supplying portion 70a.

The fuel supply unit 80a serves to supply the fuel to the stack 60a and includes a fuel tank 81a for storing the fuel and a pump 82a for supplying the fuel stored in the fuel tank 81a to the stack 60a Lt; / RTI > As the fuel, gas or liquid hydrogen or hydrocarbon fuel may be used. Examples of hydrocarbon fuels include methanol, ethanol, propanol, butanol or natural gas.

Hereinafter, the present invention will be described in more detail by way of examples. However, the following embodiments are intended to illustrate the present disclosure and are not intended to limit the present disclosure.

[Example]

[Example 1]

A 20% Nafion solution, 1-propyl alcohol, a small amount of water and glycol were added to the platinum-supported carbon catalyst (Pt / C) and stirred at a high speed to prepare a catalyst slurry. The weight ratio of the platinum-supported carbon catalyst (Pt / C), 20% Nafion solution, 1-propyl alcohol, water and glycol in the catalyst slurry was 1: 2: 10: 1: 1.

The catalyst slurry was coated on a coating material (Teflon sheet) using an inkjet coater. At this time, the amount of coating was 0.4 mg / cm 2 Pt by weight of Pt after drying. After coating the catalyst slurry, it was cured at 35 ° C for 30 minutes and at 100 ° C for 1 hour, followed by drying to form a polygonal electrode.

The unstable portion of the edge of the polygonal electrode was removed using an adhesive film.

[Comparative Example 1]

Except that the unstable portion of the edge of the polygonal electrode was removed using an adhesive film.

[Comparative Example 2]

Except that the unstable portion of the edge was removed by using a blade mechanism instead of the adhesive film. Fig. 13 (Comparative Example 2) shows a photograph in which particle fragments are generated in the process direction or in the process direction when the unstable portion of the edge is removed by using a blade-type mechanism rather than an adhesive film.

[Experimental Example 1]

Figs. 11 (Example 1) and Fig. 12 (Comparative Example 1) show photographs of the edges of the polygonal electrodes prepared in Example 1 and Comparative Example 1, respectively.

As a result, in Comparative Example 1, the edge portion was unstable, whereas in Example 1, the unstably coated electrode unevenness at the edge portion was removed.

10: Coated body
11: Coated body
12: polygonal electrode
20: electrode coating portion
30: Electrode hardening part
40: Release film removal
50: guide roll
60: Adhesive film provided
61: substrate
62: Adhesive layer
63: release film
70:
80: first press roll
81: second pressure roll
82: Groove
83: Pressure application area
90: Adhesive film collecting part
100: electrode recovery unit
10a: electrolyte membrane
20a: cathode catalyst layer
21a: anode catalyst layer
40a: cathode gas diffusion layer
41a: anode gas diffusion layer
50a: cathode
51a: anode
60a: stack
70a:
80a: fuel supply portion
81a: Fuel tank
82a: pump
A, A ', A'',A''': Width of the border area
B, B ': width of the central region
C, C ': total width of polygonal electrode

Claims (7)

A coating material supply unit;
An electrode recovery unit;
An electrode forming unit for forming at least two polygonal electrodes including a center region and a rim region apart from the coating material body that proceeds from the coating material supply unit to the electrode collection unit;
Providing an adhesive film having an adhesive layer having an adhesive region and a non-adhesive region on a substrate so that the adhesive region is in contact with an edge region of the upper surface of the polygonal electrode;
An adhesive film collecting unit for collecting the adhesive film;
A first pressure roll provided on a side opposite to a side of the pressure sensitive adhesive film that is provided with the pressure sensitive adhesive layer from the pressure sensitive adhesive film feeder to the pressure sensitive adhesive film recovery section; And
And a second pressing roll which is provided on the opposite side of the surface of the coated body on which the polygonal electrode is provided and is arranged to face the first pressing roll,
The width of the edge region of the upper surface of the polygonal electrode is 25% or less of the entire width of the polygonal electrode,
Wherein at least one of the first pressing roll and the second pressing roll has a groove portion corresponding to the size of the polygonal electrode. [2] The apparatus of claim 1,
An electrode coating unit for coating two or more polygonal electrodes including a center region and a rim region on the coated body so as to be spaced apart from each other;
And an electrode hardening portion for hardening the coated polygonal electrode. The adhesive film of claim 1, wherein the adhesive film provided by the adhesive film further comprises a release film provided on the adhesive layer,
Further comprising a release film removing unit positioned between the pressure-sensitive adhesive film supplier and the first pressurizing roll. The electrode manufacturing apparatus according to claim 1, wherein the polygonal electrode is a catalyst layer for a fuel cell. Forming two or more polygonal electrodes including a center region and a rim region on the coating body at a distance;
Disposing an adhesive film having an adhesive layer having an adhesive region and a non-adhesive region on a substrate such that the adhesive region is in contact with an edge region of an upper surface of the polygonal electrode;
Pressing the adhesive film except the non-adhesive region using a pressing roll having a groove portion corresponding to the size of the polygonal electrode; And
And removing the adhesive film to recover the polygonal electrode. [6] The method of claim 5, wherein the forming of the polygonal electrode comprises: coating two or more polygonal electrodes including a center region and a rim region on the material to be coated; And
And curing the coated polygonal electrode. [6] The method of claim 5, wherein the adhesive film further comprises a release film provided on the adhesive layer,
Further comprising the step of removing the release film of the adhesive film before the step of disposing the adhesive film.

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