KR100901490B1 - Apparatus for forming wiring and manufacturing method of printed circuit board - Google Patents

Abstract

A wiring forming apparatus and a printed circuit board manufacturing method are disclosed. An apparatus for forming a wiring extending in a predetermined direction by discharging conductive ink on a substrate, comprising: an inkjet head for discharging conductive ink in a predetermined printing direction, a plate supporting the substrate so as to be rotatable corresponding to the printing direction, and a printing direction The wiring forming apparatus including the first drive unit for moving the inkjet head relative to the substrate can control the printing error in the vertical and horizontal directions in the same manner, and the printing speed in the vertical and horizontal directions is the same, so that the same line width Not only can wiring be formed, but wiring of the same line width can be obtained with the printing resolution (DPI) of the printing in the vertical direction and the printing in the diagonal direction.

Board, Inkjet, Plate, Rotate, Align, Reference Point

Description

Apparatus for forming wiring and manufacturing method of printed circuit board

1A is a view showing a wiring formed according to the prior art.

Figure 1b is a view showing a wiring formed according to the prior art.

Figure 1c is a view showing a wiring formed according to the prior art.

Figure 1d is a view showing a wiring formed according to the prior art.

2 is a perspective view of a wire forming apparatus according to an embodiment of the present invention.

3 is a flow chart of a printed circuit board manufacturing method according to an embodiment of the present invention.

Figure 4 is a flow chart of a printed circuit board manufacturing method according to an embodiment of the present invention.

5 is a view showing a wiring formed according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

200: substrate 210: plate

220: inkjet head 230: first drive unit

240: recognition device

The present invention relates to a wiring forming apparatus and a printed circuit board manufacturing method.

Conventionally, a photolithography process has been used to form wiring on a substrate, but this requires a mask change every time the process is changed, which leads to cost and time wastage. Therefore, the proposed wire forming method using the inkjet printing technique is proposed to improve this.

Inkjet printing is a method of directly forming wirings without using conventional exposure, etching, and plating processes, and sprays a solution or suspension into droplets of several to several tens of picoliters through a micro nozzle, which is several tens of micrometers wide. Patterning technology to form fine lines. The inkjet printing technique is easy to change design, and the use of photomask is gradually increasing due to the reduction of manufacturing cost of photomask and reduction of manufacturing process time.

Figure 1 (a) is a view showing a wiring formed according to the prior art, Figure 1 (b) is a view showing a wiring formed according to the prior art, Figure 1 (c) is a view showing a wiring formed according to the prior art. 1 (d) is a diagram showing a wiring formed according to the prior art. Referring to FIGS. 1 (a), 1 (b), 1 (c), and 1 (d), the inkjet printing technique basically prints according to the printing direction due to the difference in drying time of the ejected ink droplets. I have a different problem. In the case of forming the wiring pattern by the inkjet printing method according to the prior art, as shown in FIG. 1 (a), the wiring may be formed with a constant thickness and a smooth line in a predetermined direction. As shown in c) and (d), in the case of forming a wiring pattern in a direction other than this, the connection of the wiring is not smooth and there is a difficulty in forming the wiring of the same line width. In addition, there was a difficulty in controlling the printing error.

The present invention is to provide a wiring forming apparatus and a printed circuit board manufacturing method for improving the deterioration of the print quality according to the printing direction in forming the wiring by the inkjet printing technique. In addition, the present invention provides a wiring forming apparatus and a printed circuit board manufacturing method capable of forming wiring patterns with the same line width at high resolution in various directions.

According to an aspect of the present invention, an apparatus for forming a wiring by discharging conductive ink on a substrate, comprising: an inkjet head for discharging conductive ink in a predetermined printing direction and rotatably supporting the substrate in a predetermined printing direction There is provided a wiring forming apparatus comprising a plate and a first driver for moving the inkjet head relative to the substrate in a predetermined printing direction.

The first driver may move the inkjet head in a predetermined printing direction, and may further include a second driver that rotates the plate so that the direction in which the wiring extends is aligned with the printing direction.

The apparatus may further include a recognition device that displays a reference point on the substrate and recognizes the reference point, wherein the second driver rotates the plate so that the printing start point set corresponding to the reference point is aligned with the position of the inkjet head. You can do that.

In addition, according to another aspect of the present invention, a method for manufacturing a printed circuit board by discharging conductive ink from the inkjet head on a substrate to print the wiring, comprising the steps of: aligning the direction in which the wiring is extended in a predetermined printing direction, conductive There is provided a printed circuit board manufacturing method comprising the step of ejecting ink, and moving the inkjet head relative to the substrate in the printing direction.

At this time, the substrate is rotatably supported by the plate, the alignment step may rotate the plate, the moving step may move the inkjet head in the printing direction.

Prior to the aligning step, the method may further include displaying a reference point on the substrate and recognizing the reference point, wherein the relatively moving step may be performed such that the printing start point set corresponding to the reference point is aligned with the position of the inkjet head. Can be rotated.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

Hereinafter, embodiments of a wire forming apparatus and a method of manufacturing a printed circuit board according to the present invention will be described in detail with reference to the accompanying drawings. And duplicate description thereof will be omitted.

2 is a perspective view of a wire forming apparatus according to an embodiment of the present invention. Referring to FIG. 2, a substrate 200, a plate 210, an inkjet head 220, a first driver 230, a recognition device 240, and a second driver 250 are illustrated.

In the wiring forming apparatus according to the present exemplary embodiment, in forming the wiring extending in the direction of the wiring to be formed by discharging the conductive ink on the substrate 200, the reference point is printed on the substrate 200 to position the substrate 200. And the plate 210 may be aligned so that the inkjet head 220 may form wiring in a predetermined direction.

The wiring forming apparatus according to the present exemplary embodiment may include a plate 210, an inkjet head 220, a recognition device 240, a first driver 230, and a second driver 250.

Referring to FIG. 2, the inkjet head 220 is an apparatus for discharging any fluid, and the fluid may be, for example, conductive ink. The inkjet head 220 may have one or more nozzles, and in this case, the inkjet head 220 may form one or more wires in one relative motion with respect to the substrate 200.

The inkjet head 220 may discharge conductive ink in a predetermined printing direction to form a wiring pattern. In the inkjet printing technique, print quality may vary depending on a printing direction due to a difference in drying time of ejected ink droplets, and a uniform thickness and a smooth line may be formed in a predetermined direction. The printing direction may refer to a direction in which the inkjet head 220 can form a smooth wiring pattern in discharging conductive ink to form wiring.

Referring to FIG. 2, the inkjet head 220 may be coupled to the first driver 230 to move relative to the substrate 200. The relative movement refers to the case where the inkjet head 220 is fixed and the plate 210 is translated and rotated, and the plate 210 is fixed and the inkjet head 220 is translated and rotated, or a plate ( In the case where both the 210 and the inkjet head 220 rotate and translate, the position between the inkjet head 220 and the plate 210 is changed.

Through the relative movement between the inkjet head 220 and the plate 210, the wiring forming direction and the discharge direction of the conductive ink of the inkjet head are aligned so that the conductive ink is always discharged in a predetermined printing direction to form a smooth wiring. have.

This may be implemented by the relative motion of the inkjet head 220. Of course, it is sufficient to align the substrate 200 so that the inkjet head 220 can print in a predetermined direction in a relative relationship with the plate 210 that rotatably supports the substrate 200. If the substrate 200 can be aligned, the inkjet head 220 may be fixed.

Referring to FIG. 2, the first driver 230 may move the ink jet head 220 so that the ink jet head 220 may print in a predetermined printing direction. The first driver 230 is a device that drives a target to be aligned to a desired position by a user by receiving a predetermined control signal. For example, the first driver 230 may move the target by a driving force of a motor.

Referring to FIG. 2, the plate 210 is a device for rotatably supporting the substrate 200. The plate 210 is coupled to the second driver 250 to form the wiring 310 and the predetermined printing direction of the inkjet head 220. Can be rotated to match Of course, the plate 210 may be moved in a combination of translational and rotational motions to align the substrate 200 so that the inkjet head 220 may form the wiring 310 in a predetermined printing direction. Of course, it is sufficient to align the inkjet head 220 so that the inkjet head 220 can print in a predetermined printing direction in a relative relationship with the substrate 200. have.

Referring to FIG. 2, the second driver 250 may rotate the plate 210 so that the direction in which the wiring extends and the predetermined printing direction of the inkjet head are aligned. The second driving unit 250 is a device for driving a target to be rotated to a desired position by receiving a predetermined control signal, for example, may generate power by the driving force of the motor to rotate the target.

The second driver 250 may rotate the plate 210 as well as rotate the plate 210 so that the inkjet head 220 can print in a predetermined printing direction when the direction of the wiring to be formed is changed while forming the wiring. After being aligned on the plate 210, the plate 210 may be rotated such that the predetermined printing direction and the wiring direction of the inkjet head 220 coincide with the printing start point.

Referring to FIG. 2, the recognition device 240 may be a device that recognizes a reference point indicating a position, a size, and a printing start point of the substrate 200. For example, it may be an image recognition device 240 such as a camera. The recognition device 240 may be attached to the first driver 230 like the inkjet head 220. The recognition device 240 may be used for wiring inspection by photographing the formed wiring as well as the function of recognizing the reference point.

3 is a flowchart of a method of manufacturing a printed circuit board 200 according to an embodiment of the present invention, and FIG. 4 is a flowchart of a method of manufacturing a printed circuit board 200 according to an embodiment of the present invention. Referring to FIG. 3, the substrate 200, the plate 210, the inkjet head 220, the first driver 230, the recognition device 240, the second driver 250, the reference point 300 and the wiring 310 ) Is shown.

In the present embodiment, an apparatus including a substrate 200, a plate 210, an inkjet head 220, a first driver 230, a recognition device 240, and a second driver 250 will be described.

In the method of manufacturing the printed circuit board 200 according to the present embodiment, first, as shown in FIGS. 3A and 3B, the reference point 300 is displayed on the substrate 200 (S100). . The reference point 300 may be displayed on the substrate 200 to indicate the position and size of the substrate 200. The printing of the reference point 300 may be performed using, for example, the inkjet head 220. Of course, if the position at which the substrate 200 is aligned on the plate 210 is stored in advance, and the substrate 200 is aligned on the plate 210 accordingly, the reference point 300 may not print.

The reference point 300 may be used as a starting point of printing as well as the position and size of the substrate 200. In addition, the printing of the reference point 300 may be printed on the plate 210 as well as the substrate 200. In this case, of course, the substrate 200 having a predetermined size should be aligned at a predetermined position.

Next, the reference point 300 displayed on the substrate 200 may be recognized. The recognizer 240 recognizes the reference point 300 to recognize the position and size of the substrate 200 placed on the plate 210. When the reference point 300 is recognized, the position and size of the substrate 200 may be determined based on the reference point 300. If the reference point 300 is recognized, the position of the reference point 300 in the plane can be known in two dimensions, and if the predetermined distance between the recognition device 240 and the substrate 200 is known, the position where the substrate 200 is disposed And the size of the substrate 200 can be seen.

 When the substrate 200 is recognized on the reference point 300 whenever the substrate 200 is disposed on the plate 210 to determine the position and size of the substrate 200, the positional change of the substrate 200 may be continuously changed during printing. Printing can be performed while tracking to improve the precision of the wiring 310. Of course, if the position and size at which the substrate 200 is aligned on the plate 210 are preset, and the substrate 200 is aligned on the plate 210 according to the position and size, the printing of the reference point 300 is performed. The recognition step may be omitted, and the precision of the wiring 310 may be improved.

The recognition device 240 may be, for example, an image printing device. In addition, the reference point 300 may have a function of displaying a print start point.

Next, the inkjet head 220 is aligned with the printing start point so that the predetermined printing direction of the inkjet head 220 and the wiring 310 are aligned. (S300) The printing start point recognizes the position of the substrate 200. The reference point may be a preset position, or when the reference point 300 also has a function of a print start point, the reference point 300 may be a position of the reference point 300.

The inkjet head 220 may be coupled to the first driver 230 to move relatively to the substrate 200. The relative movement may be implemented by the translational movement of the inkjet head 220. Of course, the inkjet head 220 may be aligned with the printing start point by moving the combination of the translational and rotational motions.

On the other hand, if the inkjet head 220 is fixed, the plate 210 may be aligned at the printing start point by a combination of the rotational and translational movement.

In this case, the inkjet head 220 may be disposed to correspond to a predetermined printing direction and the wiring 310 direction. The inkjet head 220 may have print quality directionality, and the inkjet head 220 may be formed on the substrate 200 so that the printing direction for forming the smooth wiring 310 and the direction of the wiring 310 to be formed coincide with each other. Say that to place on.

Next, as shown in Fig. 3C, conductive ink is discharged. (S400)

Referring to FIG. 3C, the inkjet head 220 may move in a predetermined printing direction along the direction of the wiring 310 to be formed, and may discharge conductive ink.

When the direction of the wiring 310 to be formed is a straight line, the inkjet head 220 may be printed by moving in a predetermined printing direction. When the direction of the wiring 310 to be formed is a curve that continuously changes, the inkjet head 220 may be used. The printing may be performed by a combination of translational and rotational movements so as to coincide with the predetermined printing direction of and the tangential direction of the wiring 310 to be formed. The inkjet head 220 may be combined with the first driver 230 and implemented by the first driver 230.

On the other hand, if the inkjet head 220 is fixed may be implemented by the movement of the plate (210).

Next, as shown in FIG. 3 (d), the inkjet head 220 is moved relative to the substrate 200 in the printing direction. (S500).

Referring to FIG. 3 (d), after the inkjet head 220 is moved relative to the substrate 200 to correspond to a predetermined direction of the inkjet head 220 along the shape of the wiring 310 to be formed (S500). ) The conductive ink can be discharged. Arranging the substrate 200 so that the predetermined printing direction of the inkjet head 220 and the direction of the wiring 310 to be formed corresponds to the plate 210 if the substrate 200 is supported on the rotatable plate 210. You can do it by rotating

When the shape of the wiring 310 to be formed is a straight line curved as shown in FIG. 3 (d), the inkjet head 220 moves relative to the substrate 200 in a predetermined direction, and then the The plate 210 may be rotated such that the relative movement is stopped at the bending point of the shape and the wiring 310 is aligned with the curved wiring 310 forming direction and the predetermined printing direction of the inkjet head 220. When the predetermined direction coincides with the direction of the wiring 310 to be formed, the rotation angle and the position may be stored to continuously track the position on the substrate 200 of the inkjet head 220. Of course, in this case, when the shape of the wiring 310 to be formed is not a curved straight line but a curved shape, the substrate 200 and the inkjet head 220 form the wiring 310 following the shape of the wiring 310. The position change can be stored and tracked continuously.

Matching the predetermined direction of the inkjet head 220 with the direction of the wiring 310 to be formed may be implemented by the rotation of the inkjet head 220 as well as the rotation of the plate 210.

5 is a diagram illustrating a wiring 310 formed according to an embodiment of the present invention. Referring to FIG. 5, according to an embodiment of the present invention, when the ink 310 is aligned with the predetermined printing direction and the wiring 310 direction, the conductive ink is discharged to form the wiring 310. The connection is smooth and line error can be reduced. In addition, the line width of the wiring 310 can be formed uniformly.

The present embodiment described above includes, for example, a wiring including a substrate 200, a plate 210, an inkjet head 220, a first driver 230, a recognition device 240, and a second driver 250. It can be implemented as a forming device.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

As described above, according to the embodiment of the present invention, in forming the wiring by the inkjet printing technique, the printing error in the vertical and horizontal directions can be controlled to be the same, and the printing speed in the vertical and horizontal directions is the same, so that the same line width Wiring can be formed. In addition, wiring of the line width having the same print resolution (DPI) for printing in the vertical direction and printing in the diagonal direction can be obtained.

Claims (10)

An apparatus for forming wiring by ejecting conductive ink on a substrate, An inkjet head for discharging the conductive ink in a printing direction; A plate for rotatably supporting the substrate in correspondence with the printing direction; A first driver for moving the inkjet head relative to the substrate in the printing direction; And And a second driving part which rotates the plate so that the direction in which the wiring extends and the printing direction are aligned. The method of claim 1, And the first driver moves the inkjet head in the printing direction. delete The method of claim 1, And a recognition device displaying a reference point on the substrate and recognizing the reference point. The method of claim 4, wherein And the second driving unit rotates the plate so that a printing start point set corresponding to the reference point is aligned with a position of the inkjet head. A method of manufacturing a printed circuit board by discharging conductive ink in a printing direction from an inkjet head in a printing direction to print wirings, Marking a reference point on the substrate; Recognizing the reference point; Aligning the substrate and the inkjet head such that the direction in which the wiring extends and the printing direction coincide; Ejecting the conductive ink; And And moving the inkjet head relative to the substrate in the printing direction. The method of claim 6, The substrate is supported to be rotatable by the plate, The alignment step of manufacturing a printed circuit board, characterized in that for rotating the plate. The method of claim 6, The relatively moving step, And moving the inkjet head in the printing direction. delete The method of claim 7, wherein The relatively moving step, And rotating the plate such that a printing start point set corresponding to the reference point is aligned with a position of the inkjet head.

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