KR102279275B1 - Printing Apparatus and Method for Forming Patterns Using the Same - Google Patents

Abstract

The present invention relates to a printing apparatus that prevents uncured defects and achieves accuracy of pattern-formed interlayer alignment, and a pattern formation method using the same. , a backup roll mounted on the surface of the printing roll, a roll mold having a protruding pattern, adjacent to the printing roll, and in contact with the substrate transferred between the printing roll on which the roll mold is mounted, and the progress of the substrate It characterized in that it comprises a contact control roll for controlling whether the surface contact between the roll mold and the substrate prior to the printing roll in the direction and an inspection camera located around the roll mold.

Description

Printing Apparatus and Method for Forming Patterns Using the Same}

The present invention relates to a printing apparatus, and more particularly, to a printing apparatus which prevents uncured defects and achieves accuracy of pattern-formed interlayer alignment, and a pattern formation method using the same.

Recently, as we enter the information age in earnest, the field of display that visually expresses electrical information signals has developed rapidly, and in response to this, various flat display devices with excellent performance of thinness, light weight, and low power consumption have been developed. It has been developed and is rapidly replacing the existing cathode ray tube (CRT).

Specific examples of such flat panel display devices include a liquid crystal display (LCD), a plasma display panel device (PDP), a field emission display device (FED), an electroluminescence display ( Electro Luminescence Display Device (ELD), etc., which commonly use a flat panel display panel that implements an image as an essential component, and the flat panel display panel is a pair of flat panel display panels with a material layer having inherent light emission or optical anisotropy interposed therebetween. It has a structure in which a transparent insulating substrate of

The flat panel display includes a plurality of thin films formed by a photolithography method including a deposition (coating) process, an exposure process using a mask, a developing process, and an etching process. However, the photolithography method has a problem in that the manufacturing process is complicated and thus the manufacturing cost is increased. Accordingly, in recent years, a printing method excluding the use of a mask, unlike the photolithography method, has been proposed.

In order to solve the above problems of the present invention, and in particular, it is devised for a printing device, and relates to a printing device which prevents uncured defects and achieves accuracy of pattern-formed interlayer alignment, and a pattern formation method using the same.

The printing apparatus of the present invention for achieving the above object includes a printing roll having a light emitting part therein and having a transparent surface, a roll mold mounted on the surface of the printing roll and having a protruding pattern, and the printing roll A backup roll adjacent to and in contact with the substrate transferred between the printing roll equipped with the roll mold, and a contact controlling whether the roll mold and the substrate are in surface contact before the printing roll in the moving direction of the substrate It characterized in that it comprises a control roll and an inspection camera located around the roll mold. Therefore, the surface contact of the substrate is possible during pattern formation, and when there are multiple layers through the inspection camera, the pattern formation can be made by inspecting the position of the pattern to be formed corresponding to the pattern of the previous layer, so that the alignment of the pattern by layer can be achieved. Accuracy is obtained.

In addition, the pattern forming method using the above-described printing apparatus includes the steps of preparing a substrate including a first pattern forming layer on a substrate, a printing roll having a transparent cylindrical shape and mounting a roll mold on the surface, and a backup roll Lifting the substrate using a contact control roll that precedes the printing roll in the step of transferring the substrate and the moving direction of the substrate to surface-contact the first pattern forming layer in contact with the roll mold, , imprinting the first pattern forming layer of the surface contact portion, and light-irradiated to form a cured first pattern.

In addition, following the pattern forming method, after forming the first pattern, replacing a roll mold mounted on the printing roll for forming a second pattern, and forming the first pattern on the substrate including the first pattern 2 coating the pattern forming layer, irradiating an alignment key on the substrate having the second pattern forming layer through a camera around the print roll to align the substrate and the print roll, and mounting on the print roll The method further comprises the step of forming a second pattern by imprinting and irradiating the second pattern forming layer between the backup rolls using a roll mold for forming the second pattern, so that the second pattern is formed after the first pattern is formed. 1 The position of the pattern can be grasped through the camera and the pattern can be formed, so the accuracy of aligning the pattern for each layer is obtained.

The printing apparatus and the pattern forming method using the same of the present invention as described above have the following effects.

The printing apparatus of the present invention is provided with a contact control roll capable of lifting the substrate (substrate) prior to the printing roll in the advancing direction of the substrate (substrate), to induce surface contact between the printing roll and the substrate, and to The emitted light is uniformly transmitted to the pattern forming layer on the surface-contacted substrate to achieve uniformity of the formed pattern.

In addition, the printing apparatus of the present invention includes an inspection camera around the printing roll, and moves it together with the printing roll, so that after the pattern of the previous layer is formed, the position information is used when the pattern of the next layer is formed, thereby forming a plurality of layers Accuracy of alignment between time patterns is obtained.

In addition, the printing apparatus of the present invention enables X-axis, Y-axis, Z-axis movement and Θ angle correction of the printing roll, so that, after pattern formation of the previous layer, when the area of the pattern formation layer of the next layer deviates from the original position , by adjusting the position of the printing roll, it is possible to induce normal alignment with the pattern forming layer of the next layer corresponding to the printing roll.

1A and 1B are a cross-sectional view and a perspective view showing a printing roll equipped with a roll mold of the present invention;
2A and 2B are schematic views showing a patterning method using the printing apparatus of the present invention;
3a and 3b are photographs showing a partially uncured state and a fully cured state when a pattern is cured using a printing device;
4 is a view from above of the printing apparatus of the present invention;
5 is a top view showing the printing roll of FIG. 4 and its axis and connection part;
Figure 6 is a perspective view of Figure 4
7 is a process flow chart showing a pattern forming method using the printing apparatus of the present invention.
8A and 8B are a plan view and a cross-sectional view showing the first layer printing using the printing apparatus of the present invention;
9A and 9B are views showing an alignment state before printing the second layer using the printing apparatus of the present invention according to the first embodiment;
10A and 10B are views showing an alignment state before printing the second layer using the printing apparatus of the present invention according to the second embodiment;
11A and 11B are a plan view and a cross-sectional view showing the second layer printing using the printing apparatus of the present invention;

Hereinafter, a printing apparatus of the present invention and a patterning method using the same will be described with reference to the accompanying drawings.

The printing apparatus described below basically includes a control unit for controlling the transfer of a substrate (a substrate or a substrate on which a pattern forming layer is coated), a material supply unit for supplying a pattern forming layer material, and a specific key so that an operator operates the control unit. Although the operation panel is included, these configurations are omitted as following the conventional configuration, and can mainly control the degree of contact between the pattern forming layer and the printing roll, and can also analyze the degree of alignment between the plurality of pattern layers. A detailed look at the roll and its surrounding configuration.

1A and 1B are cross-sectional and perspective views showing a printing roll mounted with a roll mold of the present invention.

1A and 1B, the printing roll 100 of the present invention has the shape of a long cylinder in one direction, and has light-emitting portions 150 on an array disposed inside the cylinder in the longitudinal direction of the cylinder. . In addition, the light emitting unit 150 has one or more LEDs or light emitting lamps spaced apart, and has a specific irradiation angle range α to irradiate light to a pattern forming layer (not shown) on the substrate. In addition, it is preferable that a plurality of light sources 150a of the light emitting unit 150 are provided at regular intervals in order to transmit light of uniform energy in the light irradiation area.

Here, the surface of the printing roll 100 and the roll mold 110 are transparent, so that the light emitted from the light emitting unit 150 is emitted from the pattern forming layer (see 200 of FIG. 2A ) on the adjacent substrate (see 200 of FIG. 2A ) in the irradiation angle range. 210)).

A roll mold 110 is mounted on the surface of the printing roll 100 , which is transparent and includes a base film 110a and a protruding pattern 110b protruding from the base film 110a to a predetermined thickness.

In addition, the light emitting unit 150 can be turned on/off, and it is preferable to maintain the on state when the light emitting unit 150 has surface contact over a predetermined area between the pattern forming layer and the roll mold 110 .

The light irradiated by the light emitting unit 150 is ultraviolet light, the pattern forming layer includes an ultraviolet curable resin, and the light emitting condition of the light emitting unit 150 may be adjusted according to the material and thickness of the ultraviolet curable resin.

The roll mold 110 is also flexible and detachable from the printing roll 100 . And, since the roll mold 110 is provided with a specific protruding pattern 110 for defining a pattern on the facing pattern forming layer, if layers having a plurality of different patterns are formed on the substrate, for each layer Roll molds 110 having different (protruding) patterns may be provided. Therefore, if a plurality of layers are formed using the same printing roll 100 to form a pattern, the pattern forming layer for each layer is coated, and then replaced with a roll mold 110 for defining the corresponding pattern on the same printing roll 100 and different from each other. It is possible to form a pattern of multiple layers of a shape. And, the replacement of the roll mold 110 is performed between forming the pattern of the previous layer and before the coated surface of the pattern forming layer of the next layer is supplied.

The protrusion pattern 110b of the roll mold 110 is limited to one example, and the spacing and width of the protruding pattern 110b can be changed in units of 1 nm to 10 mm, and the thickness of the protruding pattern 110 is limited to the desired It may vary depending on the thickness of the pattern.

Hereinafter, a patterning method using the printing roll of the present invention will be described.

2A and 2B are schematic views showing a patterning method using the printing apparatus of the present invention.

As shown in FIG. 2A , the printing roll 100 is disposed adjacent to the backup roll 300 and includes a pattern forming layer 210 on the substrate 200 between the printing roll 100 and the backup roll 300 . comes in Here, the pattern forming layer 210 is an uncured material and is in contact with the roll mold 110 mounted on the printing roll 100, and on the opposite surface, the protruding pattern 110b of the roll mold 110 is imprinted ( imprint), and the remaining material is filled with the recesses of the roll mold 110 to define a pattern. That is, when the roll mold 110 is in contact with the pattern forming layer 210, the uncured material of the pattern forming layer 210 is filled to reach the surface of the base film 110a corresponding to the main portion of the roll mold 110, In a state in which the material of the pattern forming layer 210 is filled in the recesses of the roll mold 110 and in contact with the light irradiation from the light emitting part 150 inside the printing roll 100, the definition of the pattern and the photocuring are performed together.

In this pattern definition process, the back surface of the substrate 200 meets the backup roll 300 . The backup roll 300 and the printing roll 100 are movable up and down (Z-axis movement) and X, Y-axis movement, and when the substrate 200 coated with the pattern forming layer 210 is supplied, spaced apart The backup roll 300 and the printing roll 100 are adjacent to each other through vertical movement, respectively, and the substrate 200 coated with the pattern forming layer 210 therebetween is kept adjacent to a level through which it can pass.

In this case, the substrate 200 and the pattern forming layer 210 are integrally inserted between the print roll 100 and the backup roll 300, and the print roll 100 and the backup roll 300 are in contact from above and below. and a pressure is applied and filled between the protrusion patterns 110b to define a pattern in the pattern forming layer 210 .

Here, the substrate 200 may be a polymer, metal, thin glass substrate, or a composite structure, and may be supplied in a roll-to-roll manner at a thickness level of 0.01 mm to 1 mm. In addition, the pattern forming layer 210 is also in an uncured state, which is any one layer that can be formed on the substrate, and can be coated with a thickness of 1 nm to 100 μm.

In addition, the backup roll 300 is parallel to the printing roll 100 on a cylinder similar to the shape of the printing roll 100 so that the substrate (substrate + pattern forming layer) is engaged with the printing roll 100 . It is formed long (in a direction penetrating the ground).

On the other hand, the backup roll 300 is in contact with the rear surface of the substrate 200, and when it touches the rear surface of the substrate 200, a blanket 310 of rubber or cylinder component is wound on the surface to prevent impact or damage. have.

However, FIG. 2A shows the base film 110a and the single pattern 210a between the protruding patterns 110b of the roll mold 100 as corresponding to the beginning of the substrate 200 coated with the pattern forming layer 210 . ) indicates a state in which only a single pattern 210a is shown in one cross-section of the drawing, but the pattern 210a located in the longitudinal direction of the printing roll 100 is in contact with a line).

This is in contrast to the substrate 200 and the pattern forming layer 210 coming in flat, since the printing roll 100 and the roll mold 110 are circular in cross-section, they are point contact in cross-section, and are considered as a three-dimensional shape of a cylinder shape. A line contact in the longitudinal direction is made.

If the substrate 200 coated with the pattern forming layer 210 is moving in the right direction, as shown in FIG. 2B , it is spaced apart from the backup roll 300 and is located in front of the backup roll 300 in the substrate moving direction. The light emitting part 150 by lifting the roll 400 to raise the substrate 200 so that the pattern forming layer 210 and the protruding pattern 110b of the roll mold 110 are engaged with a surface contact of a predetermined area or more. By evenly transmitting light to the surface-contacted area, imprinting (pressing the pattern forming layer) and photocuring can be performed simultaneously in the surface-contacted area.

Accordingly, the pattern 210a may be formed on the pattern forming layer 210 without an uncured portion.

If there is no lifting operation of the contact control roll 400 , as shown in FIG. 2A , the pattern forming layer 210 is in line contact with the printing roll 100 on which the roll mold 110 is mounted, and in the light emitting unit 150 . There is a problem in that the non-imprinted region of the pattern forming layer 210 may be cured because it may be irradiated to the non-contact region in addition to the region where the pattern is defined by contact. Alternatively, when the irradiation angle of the light emitting unit 150 is limited to the imprinted region, since the pattern forming layer and the roll mold are irradiated to the region in which the contact region and the non-contact state are mixed, uniformity of each region is not ensured, so that curing is uniform. There is a problem that cannot be done. In this case, the uncured part can act as a stain. In addition, if the light emitting unit 150 is irradiated with light in a state where there is only line contact, there is a problem that may cause a difference in thickness of the formed pattern or a residual film.

That is, in the pattern forming method of the present invention, as shown in FIG. 2b , irradiation of the light emitting unit 150 is performed in a state in which the printing roll 100 equipped with the roll mold 110 is in sufficient surface contact with the pattern forming layer 210 . It is possible to secure the uniformity of pattern formation by simultaneously applying the definition of the pattern and the light irradiation.

Here, when the pattern forming layer 210 is in surface contact with the roll mold 100, it will be the same in the longitudinal direction as in the line contact, as in the longitudinal direction of the roll mold 100, but as shown in FIG. 2b, In the horizontal and longitudinal direction, it is possible to form a plurality of patterns 210a at the same time by having a surface contact at a level of 10 mm to 100 mm. That is, the pattern forming layer 210 corresponds to the plurality of recesses of the roll mold 110 , so that the pattern 210a can be defined and cured at the same time. In this case, the light emitting part 150 may be sufficiently irradiated to cover the surface contact area of the portion where the pattern 210a is formed.

On the other hand, the contact control roll 400 may be provided separately from the backup roll in order to perform a specific lifting operation, or a guide roll located around the backup roll among guide rolls for controlling the progress of the substrate in the printing apparatus. It is also possible to use the guide roll as a contact control roll only at a specific point in time by allowing it to also serve as a selective lifting operation.

3A and 3B are photographs showing a partially uncured state and a fully cured state when a pattern is cured using a printing device.

3A shows the uncured portion of the pattern as a bubble when there is only line contact with the pattern forming layer with respect to the roll mold without using the contact control roll, and FIG. 3B shows the substrate 200 using the contact control roll. ) by lifting the substrate 200 in contact with the lower surface, a certain area of the roll mold is in contact with the substrate without gaps, and when light is irradiated, the pattern formed without an uncured part is completely cured. indicates

4 is a view of the printing apparatus of the present invention viewed from above, FIG. 5 is a top view showing the printing roll of FIG. 4 and its shaft and connection part, and FIG. 6 is a perspective view of FIG.

4 to 6 , the printing roll 100 of the printing apparatus of the present invention is capable of its rotation, X-axis, Y-axis, Z-axis movement, and Θ angle correction, and passes through the printing roll 100 . The shaft 160 is connected to the first and second pedestals 170a and 170b at both ends to perform X-axis movement and Y-axis movement.

In addition, the shaft 160 is connected to the motor unit 180 to perform vertical movement, that is, Z-axis movement, and when the substrate is transferred between the print roll 100 and the backup roll 300 , the print roll 100 ) is also rotated.

In addition, the first and second pedestals 170a and 170b are provided with a rail in the X-axis direction and an elevation control unit in the Y-axis direction, respectively, and perform X-axis movement and Y-axis movement together.

And, according to the alignment of the positions of the printing roll 100 and the backup roll 300, as in the drawings of FIGS. 4 and 5, when viewed from above, it has a Θ angle as well as when it is in a rectangular shape when viewed from above. It is possible to correct the distortion, which is performed by adjusting the rail and the lifting control unit for the X-axis movement and the Y-axis movement together.

On the other hand, a backup roll 300 is provided below the print roll 100 , and the print roll 100 and the backup roll 300 are connected together to the first and second pedestals 170a and 170b.

And, as shown in FIG. 6 , a substrate such as a substrate coated with a pattern forming layer is supplied between the printing roll 100 and the backup roll 300 .

Looking at the upper surface of the printing apparatus of FIG. 4 , it can be seen that cameras C1 , C2 , C3 , and C4 are positioned on both sides of the printing roll 100 . Although it is shown in the drawing that two cameras are provided on the left and right, respectively, the present invention is not limited thereto, and three or more cameras may be provided on each side.

The camera is located on the upper side of the substrate so that it can be observed from the upper side of the substrate, and with the printing roll 100 therebetween, it can be fixed to the first and second bars 190a and 190b parallel to the printing roll 100 . have. The first and second bars 190a and 190b intersect with the first and second pedestals 170a and 170b, and are fixed.

The cameras C1, C2, C3, and C4 function to inspect the alignment key provided on the substrate, and the angle of view can be adjusted. try to sort

In addition, the cameras C1, C2, C3, and C4 move together with the movement of the print roll 100, and even if the print roll 100 moves, the cameras C1, C2, C3, and C4 are horizontal between the cameras C1, C2, C3, and C4. Since the degree of separation is the same, the alignment between the substrate and the printing roll 100 can be evaluated through the cameras C1, C2, C3, and C4.

If the substrate is misaligned with respect to the print roll 100, the first and second pedestals 170a and 170b, the motor unit, which are print roll driving units that enable X, Y, Z axis or Θ angle correction of the print roll, 180 may move the print roll 100 to align with the substrate.

On the other hand, the printing apparatus of the present invention determines the alignment degree of the printing roll with respect to the substrate through the cameras C1 to C4 around the printing roll as shown in FIG. 4, and as shown in FIGS. 5 and 6, the determined alignment degree is Accordingly, the X-axis, Y-axis, Z-axis movement and θ angle correction of the printing roll is finally achieved to align the substrate and the printing roll.

Hereinafter, a method for patterning a plurality of layers using the printing apparatus will be described. Typically, a two-layer patterning method will be described, but the printing apparatus of the present invention is not limited to two-layer patterning, and three or more layers of patterning are applicable. After alignment of the layers, pattern formation takes place.

*First embodiment*

7 is a process flowchart illustrating a pattern forming method using the printing apparatus of the present invention. 8A and 8B are a plan view and a cross-sectional view showing the first layer printing using the printing apparatus of the present invention, and FIGS. 9A and 9B are the second layer using the printing apparatus of the present invention according to the first embodiment. It is a drawing showing the alignment state before printing.

As shown in FIGS. 7 and 8A and 8B , first, a substrate including the first pattern forming layer 510 on the substrate 500 is prepared ( 100S).

Next, the substrate 500 is transferred so that the surface has a transparent cylindrical shape and is inserted between the printing roll 100 having a roll mold mounted on the surface and the backup roll 300 ( 110S).

And, as shown in FIG. 7B , the printing roll 100 is mounted by sandwiching the first roll mold 1100 for forming the first pattern on the surface.

Next, as shown in FIG. 2B , the substrate 500 is lifted by using the contact control roll 400 that precedes the printing roll 100 in the moving direction of the substrate, and the second product in contact with the roll mold 110 is The first pattern-forming layer 510 is surface-contacted, the first pattern-forming layer is imprinted on the surface-contacted portion, and a cured first pattern is formed by irradiation with light (130S).

The drawing of FIG. 8A shows the upper side before forming the first pattern and the lower side after forming the first pattern with the printing roll 100 as a boundary, and the edge of the substrate 500 when the first pattern 510a is formed. The align key 550 is formed together.

In some cases, the alignment key 550 may be transferred in a state previously provided on the substrate 500 .

When the first pattern is formed, the printing roll 100 rotates about the axis 160 as a boundary, and the first protruding pattern 110b of the first roll mold 1100 mounted on the surface of the printing roll 100 is formed. The material of the first pattern forming layer is filled in the recessed portion between the first pattern forming layer materials, and the filled first pattern forming layer material is photocured to form a first pattern 510a.

On the other hand, cameras C1 to C4 are provided around the printing roll 100 , and the cameras C1 to C4 inspect the position of the region of the first pattern forming layer 510 coated on the substrate 500 , One pattern 510a is formed.

And, the drawing of FIG. 8B shows a cross-sectional view on a line passing through the print roll of FIG. 8A and the surrounding cameras C1 and C3, in which the backup roll 300 is disposed below the print roll 100 on the cross-section. have.

Meanwhile, 410 and 420, which are not described, support the substrate 500 and are guide rolls for controlling transport, and some of the guide rolls may also be used as contact control rolls.

Next, as shown in FIGS. 9A and 9B , the roll mold on the surface of the printing roll 100 is replaced with a second roll mold 1200 for forming a second pattern. The replacement with the second roll mold 1200 is possible until the second pattern forming layer 520 formed on the first pattern 510a again corresponds to the printing roll 100 after the first pattern 510a is formed. , may be performed immediately before coating the second pattern forming layer 520 , or may proceed after coating the second pattern forming layer 520 .

Next, a second pattern forming layer 520 is coated on the substrate 500 including the first pattern (140S).

In the coating of the second pattern forming layer 520 , the substrate 500 is transferred in a state in which the first pattern 510a is formed, and the portion where the first pattern 510a is formed is again the second pattern forming material supply unit. This is done when responding to

Next, the print roll 100 is inspected with a camera around the print roll 100 to correspond to the alignment key 550 on the substrate 500 to align the position of the print roll 100 with respect to the substrate 500 ( 150S). 9A and 9B show a state in which the cameras C1 and C2 correspond to the alignment key 550 .

Then, the second pattern forming layer 520 and the second roll mold 1200 are surface-contacted using the printing roll 100 arranged and mounted with the second roll mold 1200, and photocuring is simultaneously performed to form the second pattern. Form 520a (160S).

Here, since the formation of the second pattern 520a is performed by analyzing the alignment key 550 of the substrate 500 and the printing roll 100 with a camera provided in the printing equipment, the first pattern 510a This is done by accurately matching the positions of the second patterns 520a to be formed thereafter, and there is no misalignment between the first and second patterns 510a and 520a, which can serve as a basis for improving the yield.

Even in the process of forming the second pattern 520a, the contact control roll (see 400 in FIG. 2B ) is raised and lowered to increase the contact area between the second pattern forming layer and the second roll mold 1200 , and light is applied to the surface-contacted portion. This can be done by investigation.

Then, the contact control roll 400 is lowered from the back side of the substrate 500 to return to its original position.

*Second embodiment*

10A and 10B are views showing an alignment state before printing the second layer using the printing apparatus of the present invention according to the second embodiment, and FIGS. 11A and 11B are views illustrating the second layer printing using the printing apparatus of the present invention. A plan view and a cross-sectional view are shown.

7 to 8B, the second embodiment follows the method of forming the first pattern 510a of the first embodiment described above (100S to 130S).

Next, a second pattern forming layer 520 is coated on the substrate 500 including the first pattern 510a (140S).

Then, as shown in FIGS. 10A and 10B , the printing roll 100 is moved in a direction opposite to the moving direction of the substrate so that the printing roll 100 completely overlaps with the portion where the first pattern 510a is formed.

In this case, along with the printing roll 100 , the cameras C1 to C4 around the printing roll 100 also move in the opposite direction to the moving direction of the substrate, and therefore, all of the cameras C1 to C4 are of the first pattern 510a. It may correspond to the alignment key 550 formed together at the time of formation. This second embodiment is for further improving the alignment accuracy.

Through the inspection using the cameras C1 to C4 , the region of the second pattern forming layer 520 can be identified with respect to the position of the alignment key 550 .

On the other hand, in FIGS. 10A and 10B , the alignment of the second pattern forming layer 520 compared to the alignment key was attempted without the second roll mold on the printing roll 100 , but the alignment is not limited thereto. The process may be performed while the second roll mold 1200 is mounted on the printing roll 100 .

Next, as shown in FIGS. 11A and 11B , after returning the printing roll 100 to its original position, the second pattern forming layer 520 for the align key 550 uses area information, and the printing roll After the second roll mold 1200 is mounted on the 100 , a second pattern 520a may be formed on the second pattern forming layer 520 ( 160S).

Here, since the formation of the second pattern 520a is performed by analyzing the alignment key 550 of the substrate 500 and the printing roll 100 with a camera provided in the printing equipment, the first pattern 510a This is done by accurately matching the positions of the second patterns 520a to be formed thereafter, and there is no misalignment between the first and second patterns 510a and 520a, which can serve as a basis for improving the yield.

Even in the process of forming the second pattern 520a, the contact control roll (see 400 in FIG. 2B ) is raised and lowered to increase the contact area between the second pattern forming layer and the second roll mold 1200 , and light is applied to the surface-contacted portion. This can be done by investigation.

Then, the contact control roll 400 is lowered from the back side of the substrate 500 to return to its original position.

On the other hand, the above-described printing method is a method of defining a pattern by rotating a printing roll equipped with a roll mold in a state in which the pattern forming layer is formed on the substrate so that the material of the pattern forming layer is filled in the mold in the roll mold. However, the present invention is not limited thereto, and after preparing a printing roll equipped with a roll mold, ink may be filled in the recess of the roll mold and then transferred to a substrate may be substituted. In any case, since the printing roll and the substrate may correspond to each other, the printing apparatus of the present invention uses a contact control roll capable of lifting the substrate prior to the progress of the printing roll so as to increase the contact area between the printing roll and the substrate.

In addition, a camera is provided in the printing device that is spaced apart from the printing roll and can move along with the movement of the printing roll, so that the degree of alignment between the pattern forming layers can be checked, and when the degree of misalignment is large, the position of the printing roll It is meaningful to provide a print roll driving unit so that each axis (X-axis, Y-axis, Z-axis) and Θ angle can be corrected so as to correct .

In addition, the above-described pattern forming method can be applied to all pattern forming methods that can be applied in a roll-to-roll method, and is particularly useful in fields such as the backplane of a flexible display where the entire layer on the substrate is made of a flexible material, but is not limited thereto. It is also applicable to the definition of a pattern such as a display, an optical film, or a light guide plate that can be manufactured in the form of a film.

On the other hand, the present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It will be clear to those of ordinary skill in the art.

100: print roll 110: roll mold
110a: base film 110b: protrusion pattern
160: axis 170a, 170b: pedestal
180: motor unit 190a, 190b: bar
200: substrate 210: pattern forming layer
300: backup roll 310: blanket
320: backup roll axis 400: contact control roll
500: substrate 510: first pattern forming layer
510a: first pattern 520: second pattern forming layer
520a: second pattern 550: align key
1100: first roll mold 1200: second roll mold

Claims (17)

a printing roll having a light emitting part therein and having a transparent surface;
a roll mold mounted on the printing roll surface and having a protruding pattern;
a backup roll adjacent to the printing roll and in contact with the substrate transferred between the printing roll and the printing roll on which the roll mold is mounted;
a contact control roll for controlling whether surface contact between the roll mold and the substrate is made prior to the printing roll in the moving direction of the substrate; and
and an inspection camera located around the roll mold,
The printing roll is a printing apparatus, characterized in that the Y-axis movement in the longitudinal direction of the cylinder, the X-axis movement perpendicular to the Y-axis movement, the Z-axis movement and the tilt angle movement in the height direction are possible. The method of claim 1,
The roll mold is a printing apparatus, characterized in that the transparent and flexible material. The method of claim 1,
The printing apparatus, characterized in that the contact area between the roll mold and the substrate controlled by the contact control roll is within an irradiation angle range of the light emitting part. The method of claim 1,
The light emitting part is a printing apparatus, characterized in that made of a light source array including a plurality of spaced apart LED in the longitudinal direction of the printing roll. The method of claim 1,
The contact control roll is located on the lower surface of the substrate together with the backup roll, is spaced apart from the backup roll, and lifts the substrate in contact with the lower surface of the substrate, so that a certain area of the roll mold is formed between the substrate and the substrate. A printing device, characterized in that contact without gaps. The method of claim 1,
The substrate is a printing apparatus, characterized in that it comprises a substrate and a pattern forming layer on the substrate. 7. The method of claim 6,
The printing apparatus, characterized in that the pattern forming layer faces the roll mold. 7. The method of claim 6,
The printing apparatus according to claim 1, wherein a plurality of inspection cameras are placed in a longitudinal direction around the printing roll to correspond to an edge of the substrate so as to irradiate at least an alignment key on the substrate. delete preparing a substrate including a first pattern forming layer on the substrate;
transferring the substrate so that the surface has a transparent cylindrical shape and is inserted between a printing roll having a roll mold mounted on the surface and a backup roll; and
Lifting the substrate using a contact control roll preceding the printing roll in the moving direction of the substrate to surface-contact the first pattern-forming layer in contact with the roll mold, imprinting the first pattern-forming layer in the surface-contacting portion, , comprising the step of forming a cured first pattern by irradiation with light,
The printing roll is a pattern forming method, characterized in that the Y-axis movement in the longitudinal direction of the cylinder, the X-axis movement perpendicular to the Y-axis movement, the Z-axis movement and the tilt angle movement in the height direction are possible. 11. The method of claim 10,
Light irradiation in the step of forming the first pattern is a pattern forming method, characterized in that using the light emitting portion inside the printing roll. 12. The method of claim 11,
The light emitting part is a pattern forming method, characterized in that the light source array including a plurality of spaced apart LED in the longitudinal direction of the printing roll. 12. The method of claim 11,
The irradiation angle range of the light emitting part is a pattern forming method, characterized in that to cover the surface contact portion of the first pattern forming layer. 11. The method of claim 10,
In the forming of the first pattern, a plurality of alignment keys are formed together on an edge of the substrate. 11. The method of claim 10,
after forming the first pattern, replacing a roll mold mounted on the printing roll for forming a second pattern;
coating a second pattern forming layer on the substrate including the first pattern;
irradiating an alignment key on the substrate having the second pattern forming layer through a camera around the printing roll to align the substrate and the printing roll; and
The method further comprising the step of forming a second pattern by imprinting and light-irradiating the second pattern forming layer between backup rolls using a roll mold for forming a second pattern mounted on the printing roll. 16. The method of claim 15,
The step of aligning the substrate and the printing roll is performed by inspecting with a camera around the printing roll, and matching an alignment key on the substrate with the camera. 16. The method of claim 15,
The step of aligning the substrate and the printing roll may further include moving the printing roll in a direction opposite to the moving direction of the substrate so that all cameras around the printing roll correspond to the alignment key. How to form a pattern.

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