KR100968214B1 - Substrate bonding apparatus and method - Google Patents

Abstract

The present invention relates to an apparatus and a method for attaching a substrate, wherein the movable roller is freely moved back and forth to a predetermined position (set position) so that the upper substrate and the lower substrate always maintain a constant cell gap. By making it adhere | attach, it is possible to produce a touch panel with no malfunction and high reliability, and the attaching process is very quick, and the productivity can be greatly improved.

Board, adhesive member, movable roller, fixed roller

Description

Substrate Attachment Apparatus and Method {SUBSTRATE BONDING APPARATUS AND METHOD}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to substrate attachment, and more particularly, to a substrate attachment apparatus and method capable of quickly attaching an upper substrate and a lower substrate while maintaining a constant cell gap between the upper substrate and the lower substrate.

In general, a liquid crystal display device includes a liquid crystal panel in which liquid crystal is injected between two display panels, a backlight assembly including a light source and a light guide plate for supplying a constant backlight to the liquid crystal panel, and an image signal input from an external device. It is a display device to display.

In such a liquid crystal display, a digitizer for displaying an image and inputting an electric graphic signal on a displayed screen is mounted. Such a device is called an EGIP (Electric Graphic Input Panel) or a touch screen panel.

The touch screen panel is a peripheral device installed on the display surface of the liquid crystal display device and presses the touch screen panel while the user views the liquid crystal display device to input predetermined information into the computer, and the voltage corresponding to the position where the stylus pen or finger is pressed Alternatively, a current signal is generated to input a command or graphic information specified by the user.

The touch screen panel includes optical, ultrasonic, capacitive, and resistive films depending on the application, and a double resistive touch screen panel is most used.

1 is an exploded perspective view schematically illustrating a general touch panel, in which a touch panel includes a lower substrate 1, an upper substrate 2 spaced apart from the lower substrate 1 by a predetermined distance, and the upper substrate 2. It consists of the double-sided adhesive member (double-sided adhesive tape) 3 which is located between the lower board | substrates 1, and attaches them to each other.

When the touch panel is energized with each other by pressing a desired point while the voltage is applied to two opposing conductive layers, the touch panel reads the voltage value changed by the resistance value at the contact point, and then the controller changes the potential difference. It works by converting position coordinates accordingly.

The upper substrate and the lower substrate are made of a material having excellent light transmittance, heat resistance, chemical resistance and mechanical strength.

The upper substrate may be a transparent film or a glass substrate or a plastic substrate made of polyethylene terephthalate (PET) or the like.

The lower substrate is made of a transparent film or glass substrate of the same material as the upper substrate, or made of polymethylmethacrylate, polyamide, polyimide, polypropylene, polyurethane, and the like. It may be a plastic substrate.

The first electrode is formed as a conductive layer in the display area of the upper substrate, and the second electrode is formed in a surface facing the first electrode in the display area of the lower substrate.

The first electrode and the second electrode may include a transparent conductive material, for example, indium tin oxide (ITO) or indium zinc oxide (IZO).

The first electrode and the second electrode may be formed as a uniform thin film over the entire display area, and the first electrode and the second electrode may have a pattern patterned in a predetermined pattern, for example, a stripe type.

The first electrode of the upper substrate and the second electrode of the lower substrate should always maintain a constant cell gap in order for the touch panel to operate normally.

In bonding the upper substrate and the lower substrate by using a double-sided adhesive member, in the past, the adhesive member is placed on the upper surface of the lower substrate, the upper substrate is again placed on the upper surface of the adhesive member, and then the upper substrate is pressed with a squeeze and bonded. Was used.

However, in the conventional method of bonding the upper substrate and the lower substrate by using a squeeze, a constant cell gap between the upper substrate and the lower substrate is not maintained, and thus the image quality is remarkably increased, such as a malfunction of the touch panel or a stain on the image. There was a problem falling.

In addition, the conventional method is difficult to align the upper substrate and the lower substrate (alignment), there is a problem that the attachment process is delayed and productivity is lowered.

The present invention is to solve the above problems, by freely moving the movable roller back and forth to the predetermined position (set position), so that the upper substrate and the lower substrate is always bonded to maintain a constant cell gap, It is an object of the present invention to provide a substrate attaching apparatus and method capable of producing a touch panel with no malfunction, high reliability, and increasing productivity by a fast attaching process.

Substrate attachment apparatus according to the present invention for solving the above object is a base plate; A fixing roller unit fixedly installed on one side of the upper surface of the base plate and fixing a lower substrate; A movable roller unit installed on the other side of the upper surface of the base plate at a predetermined distance from the fixed roller unit and fixing the upper substrate; And the upper plate and the upper substrate in a state where the upper substrate and the lower substrate maintain a constant cell gap by moving the movable roller unit to the fixed roller unit while moving the movable roller unit back, front, left, and right. And a movable roller conveying unit for attaching the upper substrate and the lower substrate to each other through a double-sided adhesive member attached to one of the substrate and the lower substrate.

The fixed roller unit includes a pair of fixed roller support brackets installed at a predetermined interval on the base plate; A fixing roller rotatably installed on the fixing roller support bracket, and having a seating portion for mounting the lower substrate on an outer circumferential surface thereof, wherein the seating portion has a plurality of vacuum holes for adsorbing the lower substrate; A fixed roller driving motor for rotating the fixed roller; And a lower substrate setting pin installed inside the fixing roller to set a position of the lower substrate seated on the seating portion.

The movable roller conveying unit may include a forward and backward conveying screw installed on an upper surface of the base plate to move forward and backward of the movable roller unit; A front and rear movable plate coupled to the front and rear conveying screw; A first servomotor which drives the front and rear direction feeding screw to drive the front and rear movable plate in the front and rear direction; A left and right feed screw installed on the front and rear movable plate for moving the movable roller unit in left and right directions; A left and right movable plate coupled to the left and right conveying screw; And a second servomotor which drives the left and right direction conveying screw to drive the left and right movable plate in the left and right direction.

A guide part is provided between the base plate and the front and rear movable plate and between the front and rear movable plate and the left and right movable plate.

The movable roller unit includes a pair of movable roller support brackets installed at a predetermined interval on the left and right movable plates; A movable roller rotatably installed on the movable roller support bracket and having a seating portion on which an upper substrate is seated on an outer circumferential surface thereof, and a plurality of vacuum holes formed on the seating portion for adsorbing the upper substrate; A drive motor for rotating the movable roller; And an upper substrate setting pin installed inside the movable roller to set a position of the upper substrate seated on the seating portion.

A vacuum line is connected to the vacuum holes so that vacuum suction occurs through the vacuum holes.

On the other hand, the substrate attachment method according to the present invention using the lower substrate setting pin, the step of seating the lower substrate to the mounting portion of the fixed roller unit and setting the position; Mounting the upper substrate to a seating portion of the movable roller unit and setting its position using an upper substrate setting pin; Fixing the lower substrate by vacuum suction of the lower substrate through the vacuum hole formed in the mounting portion; Fixing the upper substrate by vacuum suction of the upper substrate through the vacuum hole formed in the mounting portion; Driving the first servomotor and the second servomotor of the movable roller conveying unit to approach the fixed roller unit while conveying the movable roller unit forward, backward, left, and right to a predetermined position; And attaching the upper substrate and the lower substrate to each other by rotating the movable roller of the movable roller unit and the fixed roller of the fixed roller unit at a predetermined angle.

In the step of moving the movable roller unit to the fixed roller unit while moving forward, backward, left and right, the upper substrate and the lower substrate are attached to either one of the upper substrate and the lower substrate while maintaining a constant cell gap. The upper substrate and the lower substrate are attached through the double-sided adhesive member.

In the attaching the upper substrate and the lower substrate to each other, the vacuum of the vacuum hole corresponding to the attachment position is sequentially released at the moment when the upper substrate and the lower substrate are attached to each other.

As described above, according to the substrate attaching apparatus of the present invention, the movable roller is freely moved back and forth and to the left and right at a preset position (set position) so that the upper substrate and the lower substrate are always adhered in a constant cell gap. By doing so, it is possible to produce a touch panel with no malfunction, smooth operation, and high reliability.

In addition, since the adhesion proceeds by line contact between the movable roller and the fixed roller, the attachment process is quick and productivity can be increased.

Hereinafter, an apparatus and a method for attaching a substrate according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a front view of a substrate attaching apparatus according to a preferred embodiment of the present invention, Figure 3 is a view showing the substrate attaching apparatus of Figure 2, a fixed roller holding the movable roller in a state in which the upper substrate and the lower substrate maintain a constant cell gap 4 is a front view illustrating the substrate attaching apparatus of FIG. 2, which is a front view illustrating attaching the upper substrate and the lower substrate to each other by rotating the movable roller and the fixed roller, and FIG. It is a left side view which shows the board | substrate attachment apparatus of 2, and FIG. 6 is a top view which shows the board | substrate attachment apparatus of FIG.

Hereinafter, since the description of the first electrode of the upper substrate and the second electrode of the lower substrate is a known technique, description thereof and reference numerals are omitted.

As shown in Figures 2 to 6, the substrate attachment apparatus 100 according to a preferred embodiment of the present invention includes a base plate 110; A fixing roller unit 120 fixedly installed at one side of the upper surface of the base plate 110 to fix the lower substrate 1; A movable roller unit 130 installed on the other side of the upper surface of the base plate 110 at a predetermined distance from the fixed roller unit 120 to fix the upper substrate 2 to an outer circumferential surface thereof; And installed on the base plate 110, while moving the movable roller unit 130 in front, rear, left and right, moving the movable roller unit 130 to the fixed roller unit 120 and the upper substrate (2) and The lower substrate 1 and the lower substrate 2 through the double-sided adhesive member 3 attached to any one of the upper substrate 2 and the lower substrate 1 while maintaining the constant cell gap. And a movable roller conveying unit 140 for attaching the upper substrate 2 to each other.

Referring to the configuration of the substrate attachment apparatus 100 according to a preferred embodiment of the present invention in more detail as follows.

The base plate 110 is fixed to the ground, the fixing roller unit 120 is fixed to one side of the upper surface of the base plate 110, the movable roller unit 130 on the other side of the upper surface of the base plate 110 ) Is installed to be movable.

The fixed roller unit 120 is a pair of fixed roller support brackets 121 are installed at a predetermined interval on the base plate 110; The fixing roller support bracket 121 is rotatably installed, and a seating portion 122 is formed on the outer circumferential surface on which the lower substrate 1 is seated, and the seating portion 122 adsorbs the lower substrate 1. A fixed roller 123 in which a plurality of vacuum holes 123a are formed; A fixed roller driving motor 125 for rotating the fixed roller 123; And a lower substrate setting pin 127 installed inside the fixing roller 123 to set the position of the lower substrate 1 seated on the seating portion 122.

The movable roller transfer unit 140 serves to move the movable roller unit 130 in the front-back direction.

The movable roller conveying unit 140 includes a front and rear conveying screw 141 which is installed on the upper surface of the base plate 110 to move forward and backward of the movable roller unit 130; A front and rear movable plate 142 coupled to the front and rear conveying screw 141; A first servo motor 143 driving the front and rear direction moving screw 141 to drive the front and rear movable plate 142 in the front and rear directions; Left and right feed screw 144 is installed on the front and rear movable plate 142 to move the left and right direction of the movable roller unit 130; A left and right movable plate 145 coupled to the left and right conveying screw 144; And a second servomotor 146 which drives the left and right direction transfer screw 144 to drive the left and right movable plate 145 in a left and right direction.

The movable roller unit 130 is a pair of roller support brackets 131 are installed at a predetermined interval on the left and right movable plate 145; It is rotatably installed on the roller support bracket 131, a seating portion 132 is formed on the outer circumferential surface is seated on the outer peripheral surface, the seating portion 132 for adsorbing the upper substrate (2) A movable roller 133 in which a plurality of vacuum holes 133a are formed; A movable roller drive motor 135 for rotating the movable roller 133; And an upper substrate setting pin 137 installed in the movable roller 133 to set the position of the upper substrate 2 seated on the seating portion 132.

A plurality of guide parts G1 and G2 are installed between the base plate 110 and the front and rear movable plate 142 and between the front and rear movable plate 142 and the left and right movable plate 145, respectively. do.

A vacuum line (not shown) is connected to the vacuum holes 123a and 133a and vacuum-compressed through the vacuum holes 123a and 133a.

Looking at the operation of the substrate attachment apparatus according to a preferred embodiment of the present invention configured as described above are as follows.

First, the double-sided adhesive tape 3 may be a double-sided adhesive tape, in which case a release paper (not shown) is attached to both sides. The double-sided adhesive member 3 may be attached to the upper substrate 2 according to the working conditions or design conditions of the attaching process, or may be attached to the lower substrate 1.

The double-sided adhesive member and the substrate may be attached using the attachment device according to the present invention. In the case where the double-sided adhesive member 3 is to be attached to the lower substrate 1, for example, the double-sided sheet having one release paper removed The adhesive member 3 is installed on the fixed roller unit 120 side, and the lower substrate 1 is installed on the movable roller unit 130 side. Then, the first servomotor 143 and the second servomotor 146 are driven to bring the movable roller 133 close to the fixed roller 123, and the movable roller 123 and the fixed roller 133 rotate in the same manner. The double-sided adhesive member 3 and the lower substrate 1 are attached to each other by rotating at an angle.

As described above, in order to bond the lower substrate 1 and the upper substrate 2 to each other, the double-sided adhesive member 3 must be attached to one substrate prior to their attachment process. When the double-sided adhesive member 3 is attached to the lower substrate 1, the lower substrate 1 and the upper substrate 2 on which the double-sided adhesive member 3 is attached are attached to each other in the following manner.

Hereinafter, only the process of adhering the lower substrate 1 and the upper substrate 2 to which the double-sided adhesive member 3 is attached will be described in detail.

First, the lower substrate 1 is seated on the seating portion 122. At this time, the attachment position of the lower substrate 1 is set by inserting the double-sided adhesive member 3 into the engaging groove 1a of the lower substrate 1 to which the double-sided adhesive member 3 is attached to the upper end surface of the lower substrate setting pin 127 that is being lifted. .

In the same manner, the upper substrate 2 is seated on the seating portion 132. At this time, the end of the upper substrate setting pin 137 which is elevated is inserted into the locking groove 2a of the upper substrate 2 to set the attachment position of the upper substrate 2.

Vacuum suction through the vacuum hole 123a to suck and fix the lower substrate 1 seated on the seating part 122, and vacuum suction through the vacuum hole 133a to seat the seating part 132. The substrate 2 is fixed by suction. Immediately or simultaneously with the lower substrate 1 and the upper substrate 2 being sucked and fixed by the vacuum holes 123a and 133a, the setting pins 127 and 137 are lowered to their original positions.

Then, when the second servomotor 146 is driven to rotate the left and right feed screw 144, the left and right movable plate 145 coupled to the left and right feed screw 144 is transferred in the left and right direction. At this time, the guide portion G2 serves to smoothly move the left and right movable plate 145.

At the same time, when the first servomotor 143 is driven to rotate the front and rear feed screw 141, the front and rear movable plate 145 coupled to the front and rear feed screw 141 is transferred in the forward direction. At this time, the guide portion G1 serves to smoothly move the front and rear movable plate 145.

The second servomotor 146 is driven to perform alignment by moving the left and right movable plate 145 in the left and right direction, and the first servo motor 143 is driven to preset the forward and backward movable plate 145. The movable roller 131 is brought close to the fixing roller 121 by advancing to a position (setting position). At this time, the lower substrate 1 and the upper substrate 2 are compressed while maintaining a constant cell gap.

Then, the fixed roller drive motor 125 is driven to rotate the fixed roller 123 at a predetermined angle, and at the same time the movable roller drive motor 135 is driven to rotate the movable roller 133. At this time, the fixed roller 123 and the movable roller 133 has the same rotation speed.

The movable roller unit 130 compresses the lower substrate 1 and the upper substrate 2 while maintaining a constant pressure, and the fixed roller 123 and the movable roller 133 rotate at a predetermined angle, thereby providing both sides An adhesive member 3 is bonded between the lower substrate 1 and the upper substrate 2. Accordingly, the lower substrate 1 and the upper substrate 2 are bonded to each other while maintaining a constant cell gap.

At the same time, when the lower substrate 1 and the upper substrate 2 are attached to each other, when the vacuum of the vacuum holes 123a and 133a corresponding to the attachment position is sequentially released, the lower substrate 1 and After the upper substrate 2 is attached to each other, the lower substrate 1 and the upper substrate 2 which have been attached are dropped downward, and are separated by other transfer means (not shown), for example, a transfer robot. Moved to place.

Then, the fixed roller drive motor 125 and the movable roller motor 135 are driven in the reverse direction to return the fixed roller 121 and the movable roller 131 to their original positions, and the first servo motor 143 and the first 2 The servomotor 146 is driven in the reverse direction to return the forward and backward movable plate 142 and the left and right movable plate 145 to their original positions.

On the other hand, Figure 7 is a flow chart showing a substrate attachment method according to a preferred embodiment of the present invention.

Referring to FIG. 7, the substrate attaching method according to the preferred embodiment of the present invention will be described in detail step by step.

Substrate attachment method according to a preferred embodiment of the present invention using the lower substrate setting pin, the step of mounting the lower substrate to the seating portion of the fixed roller unit and setting the position (S10); Using the upper substrate setting pin, mounting the upper substrate to a seating portion of the movable roller unit and setting a position thereof (S20); Fixing the lower substrate by vacuum suction of the lower substrate through the vacuum hole formed in the mounting portion (S30); Fixing the upper substrate by vacuum suction of the upper substrate through the vacuum hole formed in the mounting portion (S40); Driving a first servomotor and a second servomotor of the movable roller conveying unit to move the movable roller unit forward, backward, left, and right and close to the fixed roller unit (S50); And attaching the upper substrate and the lower substrate to each other by rotating the roller of the movable roller unit and the roller of the fixed roller unit at a predetermined angle (S60).

Prior to the step S10, the step of attaching the double-sided adhesive member and the lower substrate or the upper substrate is preceded.

In other words, when attaching the double-sided adhesive member and the lower substrate, the double-sided adhesive member from which one release sheet is removed is provided on the fixed roller unit (or movable roller unit) side, and the lower substrate is movable roller unit (or fixed roller unit). After mounting on the side, the double-sided adhesive member and the lower substrate can be attached to each other by driving the first servomotor and the second servomotor to approach the movable roller to the fixed roller, and rotating the movable roller and the fixed roller at the same rotation angle. have.

In the step S10, while lowering the lower substrate setting pin to protrude above the seating portion, the end of the lower substrate setting pin is inserted into the engaging groove of the lower substrate to set the position of the lower substrate.

In the same manner as in step S10, in step S20, the end of the upper substrate setting pin is inserted into the engaging groove of the upper substrate while the upper substrate setting pin is raised and protruded over the seating portion to set the position of the upper substrate. .

In the above steps S30 and S40, the lower substrate and the upper substrate are vacuum-adsorbed through the vacuum holes formed in the seating unit and fixed to the seating unit.

When both the upper substrate and the lower substrate are sucked and fixed by vacuum suction, the upper and lower substrate setting pins are both lowered and returned to their original positions.

In the step S50, the first servo motor and the second servo motor are driven to approach the fixed roller unit while moving the movable roller unit back, front, left, and right, so that the upper substrate and the lower substrate maintain a constant cell gap. The upper substrate and the lower substrate can be attached in one state.

In the step S60, the movable roller drive motor and the fixed roller drive motor are driven to rotate the movable roller and the fixed roller at the same rotation angle, thereby adhering the upper substrate and the lower substrate. At this time, the vacuum of the vacuum hole corresponding to the attachment position is sequentially released when the upper substrate and the lower substrate are attached to each other.

As described above, the present invention has been described with reference to preferred embodiments and the accompanying drawings, but different embodiments may be configured within the spirit and scope of the present invention. For example, although the lower substrate has been described as being fixed to the fixed roller unit and the upper substrate to the movable roller unit, this is for convenience of explanation only, and the upper substrate is fixed to the movable roller unit at the lower substrate, respectively. Of course it can be. In addition, the technology of the present invention can be applied to both the process of attaching the substrate and the double-sided adhesive member, or to the process of attaching the substrate and the other substrate with the double-sided adhesive member, the film, sheet as well as the heterogeneous substrate, film, sheet The technique of the present invention can also be applied to the attachment.

Accordingly, the scope of the invention is defined by the appended claims, and should be construed as not limited by the specific embodiments described herein.

1 is an exploded perspective view schematically illustrating a general resistive touch panel.

2 is a front view of a substrate attachment apparatus according to a preferred embodiment of the present invention.

3 is a front view illustrating the substrate attaching apparatus of FIG. 2 illustrating the proximity of the movable roller to the fixed roller while the upper substrate and the lower substrate maintain a constant cell gap.

4 is a front view illustrating the substrate attaching apparatus of FIG. 2, wherein the upper and lower substrates are attached to each other by rotating the movable roller and the fixed roller.

FIG. 5 is a left side view of the substrate attaching apparatus of FIG. 2.

FIG. 6 is a plan view illustrating the substrate attaching apparatus of FIG. 2.

7 is a flowchart illustrating a substrate attaching method according to a preferred embodiment of the present invention.

* Drawing reference for the main part *

1: bottom substrate

1a: jamming groove

2: upper substrate

2a: jamming groove

3: double sided adhesive member

100: substrate attachment device

110: base plate

120: fixed roller unit

121: roller support bracket

122: seating part

123: fixed roller

123a: vacuum hole

125: fixed roller drive motor

127: lower substrate setting pin

130: movable roller unit

131: roller support bracket

132: seating part

133: movable roller

133a: vacuum hole

135: movable roller drive motor

137: upper substrate setting pin

140: movable roller transfer unit

141: forward and backward feed screw

142: front and rear movable plate

143: first servomotor

144: left and right feed screw

145: left and right movable plate

146: second servomotor

G1, G2: guide part

Claims (10)

Base plate 110; A fixing roller unit 120 fixedly installed at one side of the upper surface of the base plate 110 to fix the lower substrate 1; A movable roller unit 130 installed on the other side of the upper surface of the base plate 110 at a predetermined distance from the fixed roller unit 120 to fix the upper substrate 2; And Is installed on the base plate 110, while moving the movable roller unit 130 in front, rear, left and right, moving the movable roller unit 130 close to the fixed roller unit 120 to the upper substrate (2) and the With the lower substrate 1 maintaining a constant cell gap, the upper substrate 2 and the upper substrate 2 are attached to each other through a double-sided adhesive member 3 attached to either one of the upper substrate 2 and the lower substrate 1. And a movable roller transfer unit (140) for attaching the lower substrate (1) to each other. The method of claim 1, The fixed roller unit 120 is A pair of fixed roller support brackets 121 which are installed at a predetermined interval on the base plate 110; The fixing roller support bracket 121 is rotatably installed, and a seating portion 122 is formed on the outer circumferential surface on which the lower substrate 1 is seated, and the seating portion 122 adsorbs the lower substrate 1. A fixed roller 123 in which a plurality of vacuum holes 123a are formed; A fixed roller driving motor 125 for rotating the fixed roller 123; And And a lower substrate setting pin 127 installed inside the fixing roller 123 to set the position of the lower substrate 1 seated on the seating portion 122. Device. The method of claim 1, The movable roller transfer unit 140 is Front and rear feed screw 141 is installed on the upper surface of the base plate 110 for the front and rear movement of the movable roller unit 130; A front and rear movable plate 142 coupled to the front and rear conveying screw 141; A first servomotor 143 driving the front and rear direction moving plate 142 in the front and rear directions by driving the front and rear direction conveying screw 141; Left and right feed screw 144 is installed on the front and rear movable plate 142 to move the left and right direction of the movable roller unit 130;  A left and right movable plate 145 coupled to the left and right conveying screw 144; And And a second servomotor (146) for driving the left and right moving plate (145) in the left and right direction by driving the left and right direction conveying screw (144). The method of claim 3, The base plate 110 and the front and rear movable plate 142 and the front and rear movable plate 142 and the left and right movable plate 145 is provided with a guide portion (G1) (G2) characterized in that Board Attachment Device. The method of claim 3, The movable roller unit 130 A pair of roller support brackets 131 installed at predetermined intervals on the left and right movable plates 145; The roller support bracket 131 is rotatably installed, and a seating portion 132 is formed on the outer circumferential surface of the upper substrate 2, and the seating portion 132 adsorbs the upper substrate 2. A movable roller 133 in which a plurality of vacuum holes 133a are formed; A movable roller drive motor 135 for rotating the movable roller 133; And And an upper substrate setting pin 137 installed inside the movable roller 133 to set the position of the upper substrate 2 seated on the seating portion 132. Device. The method of claim 2, And a vacuum line is connected to the vacuum hole (123a). Using the lower substrate setting pin, mounting the lower substrate to a seating part of the fixed roller unit and setting a position thereof (S10); Using the upper substrate setting pin, mounting the upper substrate to a seating portion of the movable roller unit and setting a position thereof (S20); Fixing the lower substrate by vacuum suction of the lower substrate through the vacuum hole formed in the mounting portion (S30); Fixing the upper substrate by vacuum suction of the upper substrate through the vacuum hole formed in the mounting portion (S40); Driving a first servomotor and a second servomotor of the movable roller conveying unit to move the movable roller unit forward, backward, left, and right and close to the fixed roller unit (S50); And Attaching the lower substrate and the upper substrate to each other by rotating the movable roller of the movable roller unit and the fixed roller of the fixed roller unit at a predetermined angle (S60). The method of claim 7, wherein And a double-sided adhesive member is attached to any one of the lower substrate and the upper substrate. The method of claim 7, wherein In step S50 of moving the movable roller unit forward, backward, left and right and close to the fixed roller unit, And the movable roller unit is brought close to the fixed roller unit so that the upper substrate and the lower substrate can be attached while maintaining a constant cell gap at all times. The method of claim 7, wherein In the attaching the upper substrate and the lower substrate to each other (S60), And the vacuum of the vacuum hole corresponding to the attachment position is sequentially released at the time when the upper substrate and the lower substrate are attached to each other.

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