JP2023547280A - Slot die coating equipment and method for substrate printing - Google Patents

Abstract

A slot die coating apparatus for printing a substrate according to an embodiment of the present invention includes: a stage on which a substrate is provided; a vertical gantry movable in the longitudinal direction of the stage on the stage; a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at the top of the vertical gantry; a slot provided in the horizontal gantry for discharging printing material to coat a film on the substrate; a die; a first moving member provided to connect the slot die to one side of the horizontal gantry and controlling horizontal and vertical movement of the slot die; a first moving member provided to the horizontal gantry and the coating; a second moving member connected to the other side of the horizontal gantry to control the movement of the light source in the horizontal and vertical directions; A valve provided on the top of the slot die to adjust the pressure inside the slot die; A pump connected to the slot die to control the amount of printing material discharged from the slot die; and a valve connected to the pump. a canister filled with the printing material, the coating of the film specifying a drive axis associated with the movement of the slot die by model analysis for the substrate, and parameter values for the specified drive axis. and setting the printing path of the coating based on the generated parameter value. [Selection diagram] Figure 2

Description

The present invention relates to a slot die coating apparatus and method for substrate printing, and more specifically to arbitrary shape coating printing and curved surfaces based on changes in the width of the coating printing pattern using substrate model analysis during slot die coating. The present invention relates to a slot die coating apparatus and method for printing a substrate, which allows displays of various shapes to be manufactured by printing coatings on a substrate having a substrate.

Demand is increasing day by day in the display market in the electronic industry, which includes computer monitors including large TVs, various portable devices, and various medical devices. The coating process of optically clear resin (OCR), which is used as an ultraviolet curable adhesive, is one of the display manufacturing processes.The process of coating optically clear resin (OCR), which is used as an ultraviolet curable adhesive, is one of the display manufacturing processes. Very important in quality.

The OCR coating process includes spin coating, curtain coating, slide coating, slot coating, etc., depending on the method of measuring the coating liquid. Among these coating processes, slot coating is a method in which a nozzle moves in a straight line over the substrate and sprays the coating liquid to form a film, and has the advantage of reducing the amount of coating liquid used compared to the spin coating method. Therefore, it is widely used for coating large substrates. Therefore, as displays tend to become larger, the slot coating method is most commonly used as the OCR coating process.

On the other hand, although the Republic of Korea Patent Publication No. 10-2007653 discloses a slot die device that can adjust the coating width, it is still difficult to respond quickly to the production of displays of various shapes required in various fields. The current situation is that it is not enough. For this reason, in the slot coating method using a slot die (hereinafter referred to as the "slot die coating method"), coating uniformity can be maintained constant, and it is possible to maintain constant coating uniformity when changing the coating width and bending of the coating surface. There is a need for a slot die coating apparatus and method that can meet the various requirements of the present invention.

The present invention is intended to solve the problems of the prior art as described above, and in addition to being able to maintain constant coating uniformity using substrate model analysis in the slot die coating method, it also allows for changes in coating width and coating An object of the present invention is to provide a slot die coating apparatus and method for printing a substrate, which enables coating printing on a substrate having a curved surface.

A slot die coating apparatus for substrate printing according to a first aspect of the present invention includes: a stage on which a substrate is provided; a vertical gantry provided on the stage so as to be movable in the longitudinal direction of the stage; a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at the top; a slot die provided on the horizontal gantry for discharging printing material to coat a film on the substrate; A light source provided on a gantry to irradiate ultraviolet (UV) light onto the coated film; A valve provided above the slot die to adjust the pressure inside the slot die; a pump for controlling the amount of the printing material discharged from the die; and a canister connected to the pump and filled with the printing material, the film coating being applied to the slot according to a model analysis for the substrate. The present invention is characterized in that a drive axis related to movement of the die is specified, a parameter value for the specified drive axis is generated, and a printing path of the coating is set based on the generated parameter value.

A slot die coating apparatus for substrate printing according to a second aspect of the present invention includes: a stage on which a substrate is provided; a vertical gantry provided on the stage so as to be movable in the longitudinal direction of the stage; a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at the top; a slot die provided on the horizontal gantry for discharging printing material to coat a film on the substrate; a first moving member coupled to one side of the horizontal gantry to control horizontal and vertical movement of the slot die; a light source that irradiates ultraviolet (UV) light; a second moving member that is provided to connect the light source to the other side of the horizontal gantry and controls movement of the light source in the horizontal and vertical directions; an upper part of the slot die; a valve connected to the slot die to control the pressure inside the slot die; a pump connected to the slot die to control the amount of printing material discharged from the slot die; and a valve connected to the pump; comprising a canister filled with the printing material, the coating of the film specifying a drive axis associated with the movement of the slot die by model analysis for the substrate, generating parameter values for the specified drive axis; The printing path of the coating is set based on the generated parameter values.

A slot die coating method for substrate printing according to a third aspect of the present invention includes the steps of: filling a printing material; coating and printing the printing material on a substrate using a slot die to form a film; exposing the coated film to ultraviolet (UV) light; measuring the thickness of the coated film; bonding the substrate to another substrate using the coated film; and forming the film includes performing a model analysis on the substrate; and performing a model analysis on the coated film of a slot die coating apparatus; The method may include specifying an axis; generating parameter values for the specified drive axis; setting a path for printing the coating based on the generated parameter values; and performing the coating printing. It is characterized by

The slot die coating apparatus and method for substrate printing according to the embodiments of the present invention provide the following effects.

1. By specifying the drive axis based on model analysis of the substrate to be printed, calculating parameter values for the movement of the specified drive axis, and determining the coating printing path based on this, precise control of slot die coating equipment is possible. Therefore, the accuracy of coating printing can be increased.

2. Coating printing that reflects changes in coating width and curvature changes in the coated surface enables the production of displays with a variety of shapes in a wide range of fields. This expands the application field of the OCR coating process, allows OCR to be used instead of existing OCA, and reduces display manufacturing costs.

3. By including control for matching the ejection amount and coating amount when changing the print pattern width, coating uniformity can be maintained constant.

4. The drive axis is specified based on a model analysis of the substrate to be printed, and the parameter values for the movement of the specified drive axis are calculated, and ultraviolet (UV) exposure is performed based on this, so the bending process of the substrate to be printed is excellent and the exposure process is easy. It is possible to reduce the defective rate in

5. The coating printing path determination method based on the model analysis of the substrate to be printed described above enables quick response to changes in coating width and bending of the coating surface during display manufacturing. Since the user can make changes directly through input, process time can be shortened and process convenience can be increased.

1 is a perspective view of a slot die coating apparatus according to an embodiment of the present invention.

FIG. 1 is a side view of a slot die coating apparatus according to an embodiment of the present invention.

3 is a flowchart of a slot die coating method according to an embodiment of the present invention.

1 is a flowchart illustrating a specific method of forming a film on a substrate according to an embodiment of the present invention.

5 is a flowchart illustrating a process of changing parameter values for a drive shaft based on user input according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a drive axis specified by a dimension related to a coating print shape and substrate bending during film formation on a substrate according to an embodiment of the present invention.

3A and 3B illustrate exemplary views of a substrate according to dimensions related to coating printing geometry and substrate curvature, respectively, according to an embodiment of the present invention; FIG.

FIG. 6 is a diagram for explaining how a parameter value change using user input is reflected in a print route change according to an embodiment of the present invention.

7A is a diagram illustrating how parameter values are changed in order to change the print path in FIG. 7A in a user interface according to an embodiment of the present invention. FIG.

3 is a flowchart illustrating a specific method of exposing a coated film to ultraviolet light according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating a drive axis dictated by a dimension related to substrate bending during UV exposure of a coated film according to an embodiment of the present invention.

Hereinafter, the present invention will be specifically described with reference to examples and drawings. However, the following description is not intended to limit the present invention to specific embodiments, and when describing the present invention, specific descriptions of related known techniques may obscure the gist of the present invention. If it is determined that this is the case, detailed explanation thereof will be omitted.

FIG. 1 is a perspective view of a slot die coating apparatus according to an embodiment of the present invention, and FIG. 2 is a side view of a slot die coating apparatus according to an embodiment of the present invention.

Referring to FIGS. 1 and 2, a slot die coating apparatus 100 for printing a substrate according to an embodiment of the present invention includes a stage 10 on which a substrate (not shown) is provided; A vertical gantry 51 is provided to be movable in the longitudinal direction (X-axis direction) 2 of the stage 10; a horizontal gantry 52 rotatably provided on the horizontal gantry 52; a slot die 110 provided on the horizontal gantry 52 for discharging printing material to coat a film on the substrate; a first moving member 53 that is connected to the side and controls the movement of the slot die 110 in the horizontal direction (Y-axis direction) 4 and the vertical direction (Z-axis direction) 6; , a light source 120 that irradiates ultraviolet (UV) light onto the coated film; the light source 120 is connected to the other side of the horizontal gantry 52, and the light source 120 is connected to the horizontal direction (Y-axis direction) 4; and a second moving member 54 for controlling movement in the vertical direction (Z-axis direction) 6; a valve 140 provided on the top of the slot die 110 and regulating the pressure inside the slot die 110; connected to the slot die 110; a pump 130 for controlling the amount of the printing material discharged from the slot die 110; and a canister 150 connected to the pump 130 and filled with the printing material; specifying a drive axis related to the movement of the slot die 110 through model analysis for the substrate, generating parameter values for the specified drive axis, and setting a printing path for the coating based on the generated parameter values; It is characterized by

In the following, for convenience of explanation, the longitudinal direction of the stage 10 is the X-axis direction 2, the horizontal direction (i.e., the width direction of the stage 10) is the Y-axis direction 4, and the vertical direction (i.e., the height of the stage 10) is the X-axis direction 2. The rotation direction with the horizontal direction, that is, the Y-axis direction 4 as the central axis, is described as the θ-axis direction 8.

A slot die coating apparatus 100 for printing a substrate according to an embodiment of the present invention is provided at a constant distance from a stage 10 in a Y-axis direction 4 and extending vertically in a Z-axis direction 6 on both sides of the stage 10. A horizontal gantry 52 is provided above the vertical gantry 51 and is rotatable in a rotational direction (θ-axis direction) 8 across the vertical gantry 51. The vertical gantry 51 and the horizontal gantry 52 may have substantially the same or similar structure to a gantry structure used in a typical slot die coating apparatus.

The vertical gantry 51 is movable in the X-axis direction 2, and the horizontal gantry 52 is rotatable in the θ-axis direction 8. Further, the horizontal gantry 52 may include any predetermined sections (for example, a first moving member 53 and a second moving member 54) that are movable in the Y-axis direction 4 and the Z-axis direction 6.

More specifically, in one embodiment of the present invention, referring to FIG. 2, the horizontal gantry 52 includes a first moving member 53 and a first moving member 53, which can be moved in the Y-axis direction 4 and the Z-axis direction 6 individually or simultaneously. A second moving member 54 may also be included. In this case, the first moving member 53 and the second moving member 54 may be provided on one side and the other side of the horizontal gantry 52, respectively, with respect to the X-axis direction 2. The first moving member 53 and the second moving member 54 may each be implemented by a conventional drive shaft component such as a known linear motion guide.

The slot die 110 has a slot nozzle at the bottom, and can uniformly eject printing material under pressure to coat a film on a substrate. In one embodiment of the present invention, the printing material may be an optically clear resin (OCR) used as an ultraviolet curable adhesive, as well as other adhesives or high viscosity materials such as film stock solution. It will be well understood by those skilled in the art that the present invention may be a liquid or fluid.

Light source 120 may be any light source capable of emitting ultraviolet light. For example, as the light source 120, a low pressure mercury vapor lamp, a medium pressure mercury vapor lamp, a high pressure mercury vapor lamp, an ultrahigh pressure mercury vapor lamp, a carbon arc lamp, a metal halide lamp, a xenon lamp, etc. may be used. Further, as the light source 120, an ArF excimer laser, a KrF excimer laser, an excimer lamp, a synchrotron beam, or the like may be used.

The pump 130 functions to control the amount of printing material discharged from the slot die 110, and the valve 140 functions to adjust the internal pressure of the slot die 110. The canister 150 serves the function of filling the printing material, and may also serve the functions of stirring, defoaming, and aging the printing material.

In one embodiment of the present invention, the slot die 110 and the light source 120 may be provided on a horizontal gantry 52, and more particularly, on any horizontal gantry 52 capable of movement in the Y-axis direction 4 and the Z-axis direction 6. The horizontal gantry 52 may be connected to the horizontal gantry 52 by predetermined sections (eg, the first moving member 53 and the second moving member 54).

In this case, the first moving member 53 and the second moving member 54 may be controlled simultaneously or separately, so that the slot die 110 and the light source 120 can be moved in the Y-axis direction 4 and the Z-axis direction 6 simultaneously or independently. It can be done.

In one embodiment of the present invention, a pump 130 and a valve 140 are each provided to be connected to the slot die 110, and a canister 150 is provided to be connected to the pump 130. The printing material is generally supplied from the canister 150 to the pump 130 through a tube, but is not limited thereto, and any means capable of supplying the printing material can be used.

Referring again to FIGS. 1 and 2, in one embodiment of the present invention, the letters shown in FIG. 2 (i.e., Indicates the axis.

More specifically, in one embodiment of the present invention, the _Y1 axis is a drive axis related to the movement of the first die 110a of the slot die 110 in the Y axis direction 4, and the _Y2 axis is a drive axis related to the movement of the first die 110a of the slot die 110. This corresponds to the drive shaft related to the movement of the second die 110b in the Y-axis direction 4. By controlling the Y ₁ and Y ₂ drive axes, the first and second dies 110a and 110b can be moved in the Y-axis direction 4, and the ejection width of the ejection slot of the nozzle of the slot die 110 can be expanded or reduced. Hereinafter, for convenience of explanation, the _Y1 axis and the _Y2 axis will be collectively referred to as the slot die axis (S axis).

As mentioned above, in one embodiment of the present invention, the X-axis is the drive axis associated with the movement of the vertical gantry 51 in the This corresponds to a drive shaft related to rotational movement. The horizontal gantry 52 may include a first moving member 53 and a second moving member 54 that can be individually moved in the Y-axis direction 4 and the Z-axis direction 6, and the _Y3 axis and the _Z1 axis are respectively moved by a slot die. 110 in the Y-axis direction 4 and the Z-axis direction 6, and the _Y4 axis and the _Z2 axis are respectively , corresponds to a drive axis related to the movement of the second moving member 54 in the Y-axis direction 4 and the Z-axis direction 6 for moving the light source 120 in the Y-axis direction 4 and the Z-axis direction 6.

In one embodiment of the present invention, the P-axis shown in FIG. 2 regulates the flow rate of the pump 130, so that together with the P-axis, the valve 140 that regulates the internal pressure of the slot die 110 is further controlled to control the output amount of printing material. It is possible to adjust.

FIG. 3 is a flowchart of a slot die coating method according to an embodiment of the present invention, and FIG. 4A is a flowchart for explaining a specific method of forming a film on a substrate according to an embodiment of the present invention. FIG. 4B is a flowchart illustrating a process of changing parameter values for a drive shaft based on user input according to an embodiment of the present invention.

Referring to FIGS. 3 and 4A, a slot die coating method 300 for substrate printing according to an embodiment of the present invention includes a step 310 of filling a printing material; coating the printing material on a substrate using a slot die; printing to form a film 320; exposing the coated film to ultraviolet (UV) light 330; measuring 340 the thickness of the coated film; using the coated film to coat the substrate. and a step 360 of inspecting the coated film on the bonded substrate, and the step 320 of forming the film includes performing a model analysis on the substrate. 410; specifying a drive axis related to the movement of the slot die 110 of the slot die coating apparatus 100 by the model analysis; step 420; generating a parameter value for the specified drive axis; step 430; The method may include a step 440 of setting a path for the coating printing based on the method; and a step 450 of performing the coating printing.

Filling the printing material 310 of the slot die coating method 300 for substrate printing according to the embodiment of the present invention described above may further include stirring, defoaming, and aging the printing material.

In one embodiment of the present invention, the parameter values generated in step 430 of the slot die coating method 300 can be directly changed by a user input. More specifically, referring to FIG. 4B, the step 440 of setting a coating printing path based on the generated parameter values includes a step 440a of determining whether the generated parameter values are in a fixed state. and setting the coating printing path based on the determined parameter values, and if the generated parameter values are in an undetermined state, the generated parameter values are directly input by the user. The method may further include modifying step 440b.

Since the coating printing path is based on an analysis of the model of the substrate to be printed, if the already generated parameters and/or the coating printing path have to be modified, a process of re-analyzing the model of the substrate to be printed is necessary. However, in the slot die coating method 300 according to an embodiment of the present invention, the coordinate values of the analyzed coating path can be extracted, and the user can arbitrarily modify and apply the coordinate values. Accordingly, the slot die coating apparatus 100 can be precisely controlled, reducing process time and increasing process convenience.

FIG. 5 is a diagram illustrating a drive axis specified by a dimension related to a coating print shape and substrate bending during film formation on a substrate according to an embodiment of the present invention, and FIG. FIG. 3 illustrates an exemplary appearance of a substrate according to dimensions related to coating printing geometry and substrate curvature, respectively.

Referring to FIG. 5, in one embodiment of the present invention, model analysis for the substrate may be performed by dividing the shape based on the width change of the coating print pattern and the dimension (D) based on the bending change of the substrate. . More specifically, the shape division based on the change in width of the coating printed pattern may be rectangular type, polygon type/curve type, and the dimension based on the change in substrate curvature may be rectangular type, polygon type/curve type. , 2D and 2.5D, which will be described later. It will be appreciated by those skilled in the art that, in addition to the specific shapes and dimensions described above, other shapes and dimensions may be included in the various embodiments of the invention. Probably.

An exemplary view of various shapes and dimensions of the above-described substrate model according to an embodiment of the present invention is shown in FIG. FIG. 6(a) is a schematic plan view of the shape of the coating print pattern, including a rectangular shape, a polygonal shape, and a curved shape, as seen from above based on the width change, and FIG. 6(b) is a schematic plan view of the shape of the substrate. FIG. 3 is a schematic side view of a dimension based on a bending change, viewed from the side.

Referring again to FIG. 5 in conjunction with FIG. 4A, in one embodiment of the present invention, in the step 420 of specifying a drive axis associated with slot die movement through substrate model analysis, the specified drive axis is a By classification: (a) in the case of rectangular types, the longitudinal axes of the stage and the pump axes (i.e. , slot die axes, vertical axes and pump axes (i.e., X-axis, S-axis, Z-axis, P-axis); , Z axis), and (d) 2.5D, corresponding to the longitudinal axis, vertical axis, and axis of the rotational direction (i.e., X axis, Z axis, θ axis) of the stage. do.

In one embodiment of the present invention, in the case of (b) polygon type and curved type, the step of controlling the valve 140 is further included in addition to controlling the designated drive shaft as described above during coating printing. good.

More specifically, (a) In the case of a rectangular type (specified drive axes: It corresponds to the rectangular printing pattern type. In relation to the X-axis direction, the vertical gantry 51 of the slot die coating apparatus 100 operates at a constant speed, and in relation to the P-axis direction, the pump 130 also operates at a constant speed to transfer a constant flow rate of printing material to the slot. It is configured to feed die 110. Here, it is a field of the present invention that the X axis may be a separately driven drive axis (e.g., an _XL axis and _an It will be well understood by those skilled in the art, and these points apply equally to the following description.

(b) In the case of polygon type and curved type (specified drive axes: This corresponds to a type of printing pattern with an arbitrary shape whose width changes. The printing width is changed by changing the coating amount based on the coating progress direction, and the operating speed of the X-axis, S-axis (i.e., Y1 _- axis and _Y2- axis), Z-axis, and P-axis is is controlled, and the opening and closing of the valve 140 is also actively controlled. In this case, the parameters (or printing conditions) and coating printing route set as described above can be arbitrarily modified by the user's input.

More specifically, the drive specified for each case when the coating width becomes narrower and when the coating width becomes wider based on the coating progress direction (X-axis direction) according to an exemplary embodiment of the present invention. The shaft and valve control will be explained.

When the coating width becomes narrower, the ejection width of the nozzle of the slot die 110 is reduced in relation to the S axis (ie, the _Y1 axis and the _Y2 axis). In relation to the X-axis, the discharge pressure increases due to the reduction in the internal volume of the slot die 110 while the discharge width decreases. In order to compensate for this pressure increase, the movement of the vertical gantry 51 in the X-axis direction The speed is accelerated, and if necessary, the valve 140 is controlled to be open to reduce the pressure inside the nozzle of the slot die 110. Further, in relation to the Z-axis, the slot die 110 moves in a direction away from the substrate (that is, the distance between the slot die 110 and the substrate increases), and the increased discharge amount causes the nozzle portion of the slot die 110 to become wet ( Wetting). For reference, if a nozzle wetting phenomenon occurs and the nozzle is wet or has solution attached to the nozzle, it may affect the straightness of the ejected droplet or prevent it from being ejected, which may prevent normal coating. . Also, in conjunction with the P-axis, the operating speed of the P-axis of the pump 140 that controls the flow rate is reduced such that the flow rate of the printing material is reduced.

When the coating width is increased, the ejection width of the nozzle of the slot die 110 is expanded in relation to the S axis (ie, the _Y1 axis and the _Y2 axis). In relation to the X-axis, the discharge pressure decreases due to the expansion of the internal volume of the slot die 110 while the discharge width is expanded, and air bubbles are generated. The operating speed is reduced, and if necessary, the valve 140 is also controlled in a closed state to increase the pressure inside the nozzle of the slot die 110. In addition, in relation to the Z-axis, the slot die 110 moves in the direction closer to the substrate (that is, the distance between the slot die 110 and the substrate decreases), and the reduced ejection amount causes meniscus fracture ( prevent meniscus break from occurring. For reference, the meniscus is the shape of the printing material that aggregates between the slot die nozzle and the substrate, and is generally influenced by the supplied flow rate of the printing material, the moving speed of the nozzle, the distance between the nozzle and the substrate, Coating quality is affected by the meniscus. Also, in conjunction with the P-axis, the operating speed of the P-axis of the pump 140 that controls the flow rate is increased so that the flow rate of the printing material is increased.

Here, the Z-axis may be the respective drive axes associated with the first moving member 53 and the second moving member 54 provided on the horizontal gantry 52 (e.g., the Z _1- axis and the Z _2- axis). ) will be well understood by a person skilled in the art of the present invention, and may also be a separately driven drive shaft associated with each of the two vertical gantries 51, similar to the X-axis described above. It is well understood by those skilled in the art of the present invention that it is advantageous (for example, the Z _L axis and the Z _R axis, in which case the slot die 110 is not in a horizontal position but in an inclined position). These points also apply to the following description.

(c) In the case of 2D (specified drive axes: The movement of the nozzle of the slot die 110 toward the substrate for formation of a bead of material and the movement of the nozzle of the slot die 110 back for squeezing after printing the coating (i.e., movement of the nozzle away from the substrate) Z-axis drive is required, and no Z-axis drive is required so that the nozzle and substrate can remain equally spaced during the coating printing operation.

(d) In the case of 2.5D (specified drive axes: Applicable. During coating printing, the nozzle of the slot die 110 changes the θ-axis angle so that the nozzle maintains a state perpendicular to the substrate based on the contact point or line of contact with the substrate. In this case, the X-axis drive is driven in synchronization with the θ-axis drive, and the θ-axis rotation angle of the Z-axis drive is also changed so that the set printing speed is not affected by changes in the θ-axis angle. The slot die 110 is also driven in synchronization with the θ-axis drive so that the set distance between the nozzle of the slot die 110 and the substrate is maintained. More specifically, when the θ-axis rotates in the direction in which the slot die 110 rotates in the printing direction, the operating speeds of the X-axis and Z-axis decrease in synchronization with the θ-axis, and when the slot die 110 rotates in the opposite direction to the printing direction. In addition, the operating speeds of the X-axis and Z-axis increase in a synchronous manner with the θ-axis.

FIG. 7A is a diagram for explaining how a parameter value change using a user input is reflected in a print route change according to an embodiment of the present invention, and FIG. FIG. 7B is a diagram illustrating how parameter values are changed in order to change the print path in FIG. 7A on the user interface.

Referring to FIGS. 7A and 7B together, in one embodiment of the present invention, the numerical values shown in the table of FIG. 7B are on the X-axis, S This corresponds to exemplary parameters related to driving the axes (Y ₁ , Y ₂ ) and the P axis.

Regarding points K2 to K5 for the substrate shown in the upper row of FIG. 7A, in an exemplary embodiment of the present invention, at point K2, the drive axis _Y1 axis associated with the first die and the second die of the slot die 110 is , the position of the _Y2 axis is 0 mm, and while the slot die 110 is moving to the K3 point (that is, while printing is progressing), the position of the _Y2 axis, which is the drive axis related to the second die of the slot die 110, is Changes to 30mm. As mentioned above, it can be seen that the X-axis speed is increased to compensate for the increase in discharge pressure due to the decrease in coating width. As coating printing progresses from point K4 to point K5, the position of the Y _-2 axis changes from 30 mm to 0 mm, and the X-axis speed decreases to compensate for the decrease in discharge pressure due to the increase in coating width as described above. .

In one embodiment of the present invention, the user can directly change the generated parameter values by inputting the values, and as shown in _FIG . In this case, it is possible to print a coating as shown in the lower part of FIG. 7A.

Such a method allows a user to more easily print a coating on a polygon shape having a deeper notch zone. Although FIGS. 7A and 7B above show an exemplary embodiment in which the polygon-shaped coating printing path is changed by changing an arbitrary parameter value by the user, it is also possible to input an arbitrary parameter value by the user. It will be appreciated by those skilled in the art that the coating printing path for substrates of various shapes or dimensions can also be varied by the method.

FIG. 8 is a flowchart illustrating a specific method of exposing a coated film to UV light according to an embodiment of the present invention.

Referring to FIG. 8 in conjunction with FIG. 3, a slot die coating method 300 for substrate printing according to an embodiment of the present invention includes a step 310 of filling a printing material; printing a coating of a printing material to form a film 320; exposing the coated film to ultraviolet (UV) light 330; measuring 340 the thickness of the coated film; bonding the substrate to another substrate using a method 350; and inspecting the coated film of the bonded substrate 360, and exposing the coated film to ultraviolet (UV) light. Step 330 includes performing 810 a model analysis on the substrate; specifying 820 a drive axis related to the movement of the light source 120 of the slot die coating apparatus 100 through the model analysis; generating parameter values for the specified drive axis. The method may include step 830 of determining the exposure path based on the generated parameter value; step 840 of setting the exposure path based on the generated parameter value; and step 850 of performing the exposure.

FIG. 9 is a diagram illustrating a drive axis dictated by a dimension related to substrate bending during UV exposure of a coated film according to an embodiment of the present invention.

Referring to FIG. 9, in one embodiment of the present invention, a model analysis of a substrate for an exposure process may be performed by dividing the model into dimensions based on bending changes of the substrate. More specifically, the dimensions based on substrate bending changes may be 2D and 2.5D. It will be appreciated by those skilled in the art that in addition to the specific dimensions described above, other possible dimensions may be included in various embodiments of the invention.

In one embodiment of the invention, in specifying 820 a drive axis associated with slot die movement by substrate model analysis, the specified drive axis is determined by partitioning the model for the substrate: (a) in the 2D case; (b) In the case of 2.5D, the horizontal axis, the vertical axis and the rotational axis (i.e. the X axis, Z-axis, θ-axis).

In one embodiment of the present invention, as described above, when the horizontal gantry 52 includes a first moving member 53 and a second moving member 54 that can be individually moved in the Y-axis direction 4 and the Z-axis direction 6, The light source 120 may be provided to the second moving member 54, in which case the Z axis corresponds to the _Z2 axis.

As described above, the slot die coating apparatus and method for substrate printing according to the embodiments of the present invention are capable of specifying drive axes based on model analysis of the substrate to be printed, and parameter values for movement of the specified drive axes. By calculating the coating printing path and determining the coating printing path based on it, the slot die coating equipment can be precisely controlled, thereby increasing the accuracy of coating printing, and controlling coating width changes and coating during display manufacturing. It is possible to quickly respond to changes in surface curvature, and the parameter values generated by the substrate model analysis can be directly changed by input by the user, reducing process time and increasing process convenience. Provide effect.

(Additional note)
(Additional note 1)
A slot die coating apparatus for substrate printing, comprising:
A stage where the substrate is provided;
a vertical gantry movable on the stage in the longitudinal direction of the stage;
a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at the top of the vertical gantry;
a slot die provided on the horizontal gantry for discharging printing material to coat a film on the substrate;
a light source provided on the horizontal gantry and irradiating ultraviolet (UV) light onto the coated film;
a valve provided on the top of the slot die to adjust the pressure inside the slot die;
a pump connected to the slot die and controlling the discharge amount of the printing material discharged from the slot die; and a canister connected to the pump and filled with the printing material,
The coating of the film specifies a drive axis related to the movement of the slot die through model analysis on the substrate, generates parameter values for the specified drive axis, and coats the film based on the generated parameter values. A slot die coating device characterized by setting a printing path.

(Additional note 2)
A slot die coating apparatus for substrate printing, comprising:
A stage where the substrate is provided;
a vertical gantry movable on the stage in the longitudinal direction of the stage;
a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at an upper portion of the vertical gantry;
a slot die provided on the horizontal gantry for discharging printing material to coat a film on the substrate;
a first moving member that is provided to connect the slot die to one side of the horizontal gantry and controls horizontal and vertical movement of the slot die;
a light source provided on the horizontal gantry and irradiating ultraviolet (UV) light onto the coated film;
a second moving member that is provided to connect the light source to the other side of the horizontal gantry and controls horizontal and vertical movement of the light source;
a valve provided on the top of the slot die to adjust the pressure inside the slot die;
a pump connected to the slot die and controlling the discharge amount of the printing material discharged from the slot die; and a canister connected to the pump and filled with the printing material,
The coating of the film specifies a drive axis related to the movement of the slot die through model analysis on the substrate, generates parameter values for the specified drive axis, and coats the film based on the generated parameter values. A slot die coating device characterized by setting a printing path.

(Additional note 3)
3. The slot die coating apparatus according to appendix 1 or 2, wherein the model for the substrate is classified by a shape based on a change in width of the coating print pattern and a dimension based on a change in bending of the substrate.

(Additional note 4)
The slot die coating apparatus according to appendix 3, wherein the shape is classified into a rectangular shape, a polygon shape, and a curved shape, and the dimension is classified into 2D and 2.5D.

(Appendix 5)
The designated drive axes are determined by the classification of the model with respect to the substrate: (a) the longitudinal axis and pump axis of the stage in the case of a rectangular type; (b) the axis of the stage in the case of a polygonal type and a curved type. (c) in the case of 2D, the longitudinal axis and vertical axis of the stage; (d) in the case of 2.5D, the longitudinal axis of the stage; The slot die coating apparatus according to appendix 4, characterized in that the slot die coating apparatus corresponds to an axis, a vertical axis, and an axis in the rotational direction.

(Appendix 6)
In the case of the polygon type and curved type, the slot die coating apparatus according to appendix 5 is characterized in that the valve is further controlled during coating printing.

(Appendix 7)
The slot die coating apparatus according to appendix 1 or 2, wherein the generated parameter values can be directly changed by a user's input.

(Appendix 8)
Ultraviolet (UV) investigation on the coated film specifies a drive axis related to the movement of the light source by model analysis on the substrate, generates parameter values for the specified drive axis, and generates parameter values for the specified drive axis. The slot die coating apparatus according to appendix 1 or 2, characterized in that the exposure path is set based on the value.

(Appendix 9)
9. The slot die coating apparatus according to appendix 8, wherein the model for the substrate is classified by dimensions based on bending changes of the substrate.

(Appendix 10)
The dimensions are divided into 2D and 2.5D,
The specified drive axes are determined by the model classification for the substrate: (a) in the case of 2D, a horizontal axis and a vertical axis; (b) in the case of 2.5D, a horizontal axis, a vertical axis, and The slot die coating apparatus according to appendix 9, which corresponds to the axis of the rotation direction.

(Appendix 11)
A slot die coating method for substrate printing, the method comprising:
filling the printing material;
coating and printing the printing material on a substrate using a slot die to form a film;
exposing the coated film to ultraviolet (UV) light;
measuring the thickness of the coated film;
bonding the substrate to another substrate using the coated film; and
performing an inspection on the coated film of the bonded substrate;
Forming the film includes performing a model analysis on the substrate; specifying a drive axis related to the movement of the slot die of the slot die coating apparatus by the model analysis; and determining parameter values for the specified drive axis. A slot die coating method, comprising the steps of: generating; setting a path for the coating printing based on the generated parameter values; and performing the coating printing.

(Appendix 12)
12. The slot die coating method according to claim 11, wherein the model for the substrate is classified according to a shape based on a change in width of the coating print pattern and a dimension based on a change in bending of the substrate.

(Appendix 13)
The slot die coating method according to appendix 12, wherein the shape is classified into a rectangular shape, a polygon shape, and a curved shape, and the dimension is classified into 2D and 2.5D.

(Appendix 14)
The designated drive axes are determined by the segmentation of the model for the substrate: (a) in the case of a rectangular type, the longitudinal axis and pump axis of the stage on which the substrate is provided; (b) in the case of a rectangular type, and (b) in the case of a polygonal type and a curved type. (c) the longitudinal axis and vertical axis of the stage if 2D; (d) the longitudinal axis and vertical axis of the stage if 2.5D; The slot die coating method according to appendix 13, wherein the slot die coating method corresponds to a longitudinal axis, a vertical axis, and a rotational axis of the stage.

(Appendix 15)
15. The slot die coating method according to claim 14, further comprising controlling a valve of a slot die coating apparatus during coating printing in the case of the polygon type and the curved type.

(Appendix 16)
Setting a coating printing path based on the generated parameter values includes:
determining whether the generated parameter values are in a determined state; and setting a coating printing path based on the determined parameter values;
12. The slot die coating method according to claim 11, further comprising the step of directly changing the generated parameter value by a user's input when the generated parameter value is in an undetermined state.

(Appendix 17)
The slot die coating method according to appendix 11, wherein the step of filling the printing material further includes stirring, defoaming, and aging the printing material.

(Appendix 18)
The step of exposing the coated film to ultraviolet (UV) light includes the step of performing a model analysis on the substrate; specifying a drive axis related to the movement of a light source of a slot die coating apparatus by the model analysis; The slot according to appendix 11, characterized in that the slot includes the steps of: generating a parameter value for the generated drive shaft; setting the exposure path based on the generated parameter value; and performing the exposure. Die coating method.

(Appendix 19)
19. The slot die coating method according to appendix 18, wherein the model for the substrate is classified according to dimensions based on bending changes of the substrate.

(Additional note 20)
The dimensions are divided into 2D and 2.5D,
The designated drive axes are determined by the model classification for the substrate: (a) horizontal axis and vertical axis in the case of 2D; (b) horizontal axis, vertical axis and The slot die coating method according to appendix 19, characterized in that the method corresponds to an axis in a rotational direction.

Various modifications may be made to the structures and methods described and illustrated herein without departing from the scope of the invention, and may be included in the above detailed description or illustrated in the accompanying drawings. All matters herein are illustrative and not intended to limit the invention. Therefore, the scope of the invention should not be limited by the exemplary embodiments described above, but should be defined only by the following claims and their equivalents.

Claims (20)

A slot die coating apparatus for substrate printing, comprising:
A stage where the substrate is provided;
a vertical gantry movable on the stage in the longitudinal direction of the stage;
a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at the top of the vertical gantry;
a slot die provided on the horizontal gantry for discharging printing material to coat a film on the substrate;
a light source provided on the horizontal gantry and irradiating ultraviolet (UV) light onto the coated film;
a valve provided on the top of the slot die to adjust the pressure inside the slot die;
a pump connected to the slot die and controlling the discharge amount of the printing material discharged from the slot die; and a canister connected to the pump and filled with the printing material,
The coating of the film specifies a drive axis related to the movement of the slot die through model analysis on the substrate, generates parameter values for the specified drive axis, and coats the film based on the generated parameter values. A slot die coating device characterized by setting a printing path. A slot die coating apparatus for substrate printing, comprising:
A stage where the substrate is provided;
a vertical gantry movable on the stage in the longitudinal direction of the stage;
a horizontal gantry rotatably provided in a rotational direction across the vertical gantry at the top of the vertical gantry;
a slot die provided on the horizontal gantry for discharging printing material to coat a film on the substrate;
a first moving member that is provided to connect the slot die to one side of the horizontal gantry and controls horizontal and vertical movement of the slot die;
a light source provided on the horizontal gantry and irradiating ultraviolet (UV) light onto the coated film;
a second moving member that is provided to connect the light source to the other side of the horizontal gantry and controls horizontal and vertical movement of the light source;
a valve provided on the top of the slot die to adjust the pressure inside the slot die;
a pump connected to the slot die and controlling the discharge amount of the printing material discharged from the slot die; and a canister connected to the pump and filled with the printing material,
The coating of the film specifies a drive axis related to the movement of the slot die through model analysis on the substrate, generates parameter values for the specified drive axis, and coats the film based on the generated parameter values. A slot die coating device characterized by setting a printing path. 3. The slot die coating apparatus according to claim 1, wherein the model for the substrate is classified by a shape based on a change in width of the coating print pattern and a dimension based on a change in bending of the substrate. The slot die coating apparatus according to claim 3, wherein the shape is classified into a rectangular shape, a polygon shape, and a curved shape, and the dimensions are classified into 2D and 2.5D. The designated drive axes are determined by the classification of the model with respect to the substrate: (a) the longitudinal axis and pump axis of the stage in the case of a rectangular type; (b) the axis of the stage in the case of a polygonal type and a curved type. (c) in the case of 2D, the longitudinal axis and vertical axis of the stage; (d) in the case of 2.5D, the longitudinal axis of the stage; The slot die coating apparatus according to claim 4, characterized in that the slot die coating apparatus corresponds to an axis, a vertical axis, and an axis in the rotational direction. The slot die coating apparatus according to claim 5, further comprising controlling the valve during coating printing in the case of the polygon type and the curved type. The slot die coating apparatus according to claim 1 or 2, wherein the generated parameter values can be directly changed by a user's input. Ultraviolet (UV) investigation on the coated film specifies a drive axis related to the movement of the light source by model analysis on the substrate, generates parameter values for the specified drive axis, and generates parameter values for the specified drive axis. 3. The slot die coating apparatus according to claim 1, wherein the exposure path is set based on the value. The slot die coating apparatus of claim 8, wherein the model for the substrate is divided by dimensions based on bending changes of the substrate. The dimensions are divided into 2D and 2.5D,
The specified drive axes are determined by the model classification for the substrate: (a) in the case of 2D, a horizontal axis and a vertical axis; (b) in the case of 2.5D, a horizontal axis, a vertical axis, and The slot die coating apparatus according to claim 9, wherein the slot die coating apparatus corresponds to the axis of the rotation direction. A slot die coating method for substrate printing, the method comprising:
filling the printing material;
coating and printing the printing material on a substrate using a slot die to form a film;
exposing the coated film to ultraviolet (UV) light;
measuring the thickness of the coated film;
bonding the substrate to another substrate using the coated film; and
performing an inspection on the coated film of the bonded substrate;
Forming the film includes performing a model analysis on the substrate; specifying a drive axis related to the movement of the slot die of the slot die coating apparatus by the model analysis; and determining parameter values for the specified drive axis. A slot die coating method, comprising the steps of: generating; setting a path for the coating printing based on the generated parameter values; and performing the coating printing. 12. The slot die coating method of claim 11, wherein the model for the substrate is classified according to a shape based on a change in width of the coating print pattern and a dimension based on a change in bending of the substrate. The slot die coating method according to claim 12, wherein the shape is classified into a rectangular shape, a polygon shape, and a curved shape, and the dimensions are classified into 2D and 2.5D. The designated drive axes are determined by the segmentation of the model for the substrate: (a) in the case of a rectangular type, the longitudinal axis and pump axis of the stage on which the substrate is provided; (b) in the case of a rectangular type, and (b) in the case of a polygonal type and a curved type. (c) the longitudinal axis and vertical axis of the stage if 2D; (d) the longitudinal axis and vertical axis of the stage if 2.5D; The slot die coating method according to claim 13, characterized in that the stage corresponds to a longitudinal axis, a vertical axis, and a rotational axis. The slot die coating method according to claim 14, further comprising controlling a valve of a slot die coating apparatus during coating printing in the case of the polygon type and the curve type. Setting a coating printing path based on the generated parameter values includes:
determining whether the generated parameter values are in a determined state; and setting a coating printing path based on the determined parameter values;
The slot die coating method of claim 11, further comprising the step of directly changing the generated parameter value by a user's input when the generated parameter value is in an undetermined state. 12. The slot die coating method of claim 11, wherein the step of filling the printing material further includes stirring, defoaming, and aging the printing material. The step of exposing the coated film to ultraviolet (UV) light includes the step of performing a model analysis on the substrate; specifying a drive axis related to the movement of a light source of a slot die coating apparatus by the model analysis; 12. The method according to claim 11, further comprising the steps of: generating parameter values for the generated drive shaft; setting the exposure path based on the generated parameter values; and performing the exposure. Slot die coating method. The slot die coating method of claim 18, wherein the model for the substrate is divided into dimensions based on bending changes of the substrate. The dimensions are divided into 2D and 2.5D,
The specified drive axes are determined by the model classification for the substrate: (a) in the case of 2D, a horizontal axis and a vertical axis; (b) in the case of 2.5D, a horizontal axis, a vertical axis, and The slot die coating method according to claim 19, characterized in that the slot die coating method corresponds to an axis in a rotation direction.

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