KR20170081860A - Inkjet printer system for manufacturing touch panel - Google Patents

Abstract

A driving unit 12 for controlling the movement and operation of the ink jet head, a printer head 60 for printing an insulating layer, and a valve control unit (not shown) for controlling the movement and operation of the printer head And a CPU 11 for controlling the movement and operation of the driving unit 12 and the valve control unit 14. The ultraviolet curing LED device 10-1 and the infrared device 10 The inkjet head 100 prints a metal electrode on a substrate (glass or plastic), and the CPU prints the metal electrode and then drives the infrared LED element A resin insulating layer is printed on the metal electrode by using the printer head 60. After the resin insulating layer is printed, the ultraviolet LED element is driven to cure the insulating layer Therefore, It is possible to manufacture a touch panel electrode which can be applied to a flexible substrate because the adhesive strength of the substrate to the substrate is small and the electrode wiring is hardly damaged by the use of the touch panel and the flexibility is excellent. And the drying of the electrode and the curing of the insulating layer can be performed in a single step.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ink-

The present invention relates to an ink jet printer system for manufacturing touch panels, which can form thin and uniform wirings when electrode wirings are formed, and further coated with an insulating film having an additional bonding function and an insulating function, The present invention relates to an ink jet printer system for manufacturing a touch panel, which is suitable for a flexible substrate.

In recent years, demand for portable terminals has surged, and most of the portable terminals are also equipped with a touch panel function, so that demand for touch panels is rapidly increasing.

ITO using a sputtering process is widely used as a transparent electrode material. However, the method using ITO has a problem that the flexibility of the ITO layer is poor and is not suitable for a flexible substrate, and the process for forming the ITO layer is very expensive.

Due to these problems, new material / process technology is required to be applied to low-cost flexible devices. Therefore, in order to replace the ITO with the fine electrode wiring using the printing electronic technique, it is difficult to form the thin and uniform wiring at the time of forming the electrode wiring by using the ink jet, thereby securing the reliability of the uniform wiring, There has been a demand for a new method of manufacturing a touch screen panel capable of enhancing durability by minimizing occurrence of electrode wiring damage due to use due to insufficient adhesion with a substrate.

In particular, Korean Patent Laid-Open Publication No. 10-2015-0091380 discloses a composition comprising (A) an inorganic particle, (B) a solvent, (C) a polymer containing a structural unit having an acid- D) a photoacid generator, and component B has a boiling point of 177 DEG C or higher and 227 DEG C or lower and an I / O value of 0.50 or higher and 1.00 or lower. "And,

Korean Patent Laid-Open Publication No. 10-2012-0044268 discloses a process for forming a second axial pattern including a first axial pattern including a plurality of first axial electrostatic electrodes and a plurality of second axial electrostatic electrodes on an ITO film ; Electrically connecting the first axial electrostatic electrodes to each other; Applying an insulator on a connection portion between the first axial electrostatic electrodes; And electrically connecting the second axial electrostatic electrode on the insulator. &Quot; The present invention provides a method for manufacturing a capacitive touch panel.

However, the above-mentioned patent technology does not provide a specific method for increasing the adhesive force of the electrode or having a strong adhesive force to the flexible substrate by providing only the general technique for forming the electrode. Therefore, even if the thickness of the wiring is thin, So that electrode wiring damage due to use of the touch panel hardly occurs, and it is inevitable to develop a manufacturing technology for forming a touch panel electrode which is excellent in flexibility and applicable to a flexible substrate.

Korean Patent Publication No. 10-2015-0091380, Disclosure Date (Aug. 10, 2015) Korean Patent Publication No. 10-2012-0044268, publication date (May 07, 2012)

An object of the present invention is to provide an ink jet printer system for manufacturing a touch panel which is strong enough to adhere to a substrate even when the thickness of the wiring is thin and hardly causes electrode wiring damage due to use of the touch panel and is excellent in flexibility and applicable to a flexible substrate I want to.

The above object can be achieved by an ink jet recording apparatus comprising an ink jet head 100 for printing a gold electrode, a driving unit 12 for controlling the movement and operation of the ink jet head, a printer head 60 for printing an insulating layer, And a CPU 11 for controlling the movement and operation of the driving unit 12 and the valve control unit 14 are provided and the ultraviolet curing LED device 10-1 is provided with a valve control unit 14, The ink jet head 100 further includes a metal electrode printed on a substrate (glass or plastic), and the CPU prints the metal electrode, and then the infrared A resin insulating layer is printed on the metal electrode by using the printer head 60 and the ultraviolet LED element after the resin insulating layer is printed is driven The insulating layer is cured .

The multi head 300 is further provided and the ink jet head 100, the printer head 60, the ultraviolet LED element 10-1 and the infrared LED element 10-2 are respectively provided , The multi-head (300) can be moved left and right.

According to the present invention, it is possible to manufacture a touch panel electrode which is strong enough to adhere to a substrate even when the thickness of the wiring is thin, so that electrode wiring damage due to use of the touch panel hardly occurs and flexibility is excellent, In particular, by using a multi-head, an insulating layer having an adhesive function can be collectively formed, and the drying of the electrode and the curing of the insulating layer can be performed in a single step.

1 and 2 are views showing an embodiment of an electrode type manufactured by the ink-jet printer system for manufacturing a touch panel of the present invention.
Figs. 4 to 6 are views showing embodiments of an ink jet head capable of printing touch panel electrodes. Fig.
Figures 7 and 8 are views of embodiments showing a head for coating and printing an insulating layer.
9 is a diagram of an embodiment showing a system block diagram of the present invention,
10 is a view showing an embodiment showing the configuration of the multi-head of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The configuration of the present invention and the operation and effect thereof will be clearly understood through the following detailed description.

Further, a detailed description of the known technology may be omitted.

An ink-jet printer system for manufacturing a touch panel capable of being applied to a flexible substrate, which has high adhesion to a substrate even when the thickness of a wiring is thin, hardly causes electrode wiring damage due to use of the touch panel, and is excellent in flexibility.

1 and 2 are views showing an embodiment of an electrode type manufactured by the ink-jet printer system for manufacturing a touch panel of the present invention.

The electrostatic capacity type is provided with a function plate on which a window plate or a protection plate is provided on the upper side and a conductive layer or ITO layer is formed under the window plate or the protection plate. At this time, one layer may be formed, two layers may be formed, or more layers may be formed. Therefore, two functional plates coated with a conductor layer may be used.

For example, FIG. 1 illustrates that two functional plates 241a are used, each having a conductive layer 223 formed therein, and the two functional plates are coupled together with an insulating layer interposed therebetween.

2 is a view showing an embodiment in which a lattice-shaped electrode pattern 244 is formed on a conductor layer, each pattern is connected to an electrode line 243, and lead wires 222 are provided at each four corners.

FIG. 3 is a view of another embodiment showing a pattern of another type, in which a conductor layer is patterned in a stripe shape. That is, the active area 223 of the input device (the touch panel activation area in which the conductive material is formed and information can be input) is patterned to form a conductor 223a layer.

At this time, lead wires 222a are connected to both sides of the patterned conductor 223a.

1 to 3 are views showing embodiments of a touch panel in which an electrode pattern is formed. The ink-jet printer system for manufacturing a touch panel of the present invention is not necessarily applied to only the pattern shapes of FIGS. 1 to 3, The ink-jet printer system for manufacturing a touch panel of the present invention can be applied to the manufacture of a touch panel.

Figs. 4 to 6 are views showing embodiments of an ink jet head capable of printing touch panel electrodes. Fig.

On the other hand, the piezoelectric actuator method is divided into a method of jetting using a piezoelectric piezoelectric (Piezo Electric) or a ceramic piezoelectric electric (Ceramic Electric).

The piezo-electric piezo-electric actuator is a piezo-electric piezo actuator (piezo actuator) which injects ink at a mechanical pressure.

When the printer sends an electric signal to the piezoelectric element, the piezoelectric element vibrates, and the pressure of the vibration pushes the ink out of the nozzle hole. The missing part is filled by Mosaic phenomenon and inertia law.

In addition, the ceramic piezoelectric device is operated by reciprocating the elongated state or the reduced state of each crystal by applying or removing the electric field in the same direction after the polarization treatment of the ceramic, and the ceramic piezoelectric device is caused to move by the movement of the ceramic piezoelectric actuator as a whole.

Such a piezoelectric actuator method is advantageous in that the ejection of ink can be precisely controlled by current control.

By adjusting the time for controlling the current of the piezoelectric element when the ink droplet swells, the size of the ink droplet that is pushed out can be adjusted. Therefore, it is possible to make small ink droplets while making the nozzles large, and it is possible to perform multi-printing in which ink droplets of various sizes are formed with one nozzle.

The ink jet print head 100 of the hybrid type to be described in the present embodiment is an ink jet print head that ejects ink temporarily stored in the ink chamber 112 by electrostatic induction, (See FIG. 4) provided on the bottom surface of the head housing 110, and a plurality of ink chambers (not shown) mounted on the upper side of the ink chamber 112. The head housing 110 includes a plurality of ink chambers 112, A piezoelectric actuator 160, and an electrode 120 disposed inside the ink chamber 112.

The ink chamber 112 includes a first chamber 112a having a cylindrical shape and a second chamber 112b formed at a lower end of the first chamber 112a and having a reduced diameter toward the lower side, And a nozzle (N) having the same center as the second chamber (112b) and opened at one side of the bottom surface of the ink chamber (112).

In this embodiment, it is exemplified that the head housing 110 has a plurality of ink chambers 112 having a shape as described above inside the box-shaped main body 111.

The electrode 120 includes the cylindrical portion 122 having the same diameter and the reducing portion 123 formed at the lower end of the cylindrical portion 122 and decreasing in diameter toward the lower side. And a bent portion 121 formed on the upper portion and extending to the outside of the ink chamber 112.

In this embodiment, the end portion of the shrinking portion 123 is formed in a sharp manner, because an electric field is concentrated on the vertex portion to help generate the meniscus described above.

The piezoelectric actuator 160 may be disposed on the upper side of the ink chamber 112, that is, on the upper side of the head housing 110. At this time, the piezoelectric actuator 160 includes a plate-like vibration plate 162 mounted on the ink chamber 112, that is, the upper side of the head housing 110, and a piezoelectric element 162 mounted on the vibration plate 162. (Not shown).

At this time, the vibration plate 162 is deformed by the deformation of the piezoelectric element 161, and the ink temporarily stored in the ink chamber 112 can be pushed toward the nozzle N by the deformation.

In addition, it may further include a plate-like insulating plate 130 installed between the upper side of the ink chamber 112 and the vibrating plate 162.

The insulating plate 130 may be formed with an ink inlet hole 132 communicating with the ink chamber 112. In this embodiment, the insulating plate 130 forms the plurality of ink chambers 112 The main body 131 and the main body 131 have the same size as that of the head housing 110. The positions of the main body 131 and the main body 131 are the same as those of the head housing 110, An ink inlet hole 132 is formed at a position where ink can be injected into the ink chamber 112.

With such a configuration, the insulation plate 130 can electrically insulate the ink, and ink can be introduced into the ink chamber 112 through the ink introduction hole 132.

On the other hand, a flow space R (see FIG. 3) in which ink can flow toward the ink chamber 112 is required. It is also possible to further include a spacer 140 disposed above the insulating plate 130 to secure a space between the insulating plate 130 and the vibration plate 162 to form a space through which the ink can flow. In this embodiment, the ink inlet holes 132 of the insulating plate 130 are formed in two lines, so that the ink inlet holes 132

Three spacers having a beam shape, i.e., first, second, and third spacers 141, 142, and 143 are disposed.

When the insulating plate 130 is covered on the three spacers 140, a space between the three spacers 140 is a space through which ink can flow.

In addition, it is possible to further include a protruding protrusion 112c protruding around the nozzle N. This is because the protruding protrusion 112c is formed to facilitate the formation of the meniscus, Because it can save energy.

In particular, the head of the present invention is suitable for the use of an organic silver precursor having a patterning of 30 to 60 탆 and a reduction temperature of 106.0 ° C. to 290.4 ° C. The optimal metal ink has a viscosity of 11.97 cPs and a surface tension of 34.70 dyne / cm, the metal content is 30.05 wt.%, and the reduction temperature is 205.03 ° C.

The electric resistance is 8.39 μΩ-㎝ when annealed at 250 ℃ for 10 minutes, and the fine pattern of less than 30 ㎛ is also possible in high-resolution Ink-jet printing system for display using Ag-ink.

Figures 7 and 8 are views of embodiments showing a head for coating and printing an insulating layer.

FIG. 7 is an illustration of an embodiment of a printhead 60 that is used to print high viscosity materials, primarily 10,000 cp or more, using pressure. That is, when supplying the material, pressure is applied to eject the material, and when the material is sucked, the pressure is applied in the opposite direction to suck the material.

The material is supplied through the supply part 63 by the pressure, sprayed through the nozzle 61, and sucked through the suction port 62 when the material is sucked.

As shown in the drawing, the direction in which the material is ejected and the direction in which the material is sucked are orthogonal. On the other hand, this control can be achieved by controlling the pump that the central processing unit 10 applies pressure to.

At this time, the pump for ejecting the material and the pump for sucking the material are provided, respectively. However, in some cases, it is natural that the pump for ejecting the material and the pump for sucking the material may be integrated.

8 is a view of an embodiment showing the structure of a printhead 60 capable of ejecting material using a screw motor 66 and of sucking material using pressure or using a reverse rotation of a screw motor 66 . The above printhead is used when jetting a high viscosity material having a viscosity of 20,000 cps or more. When the screw motor 66 rotates, the material is pushed out by the coupling 65 and the screw 64, and the material is ejected through the nozzle 61.

That is, the material is supplied through the material supply part 63 using the pressure, and the material is finally ejected using the screw motor. On the other hand, when the material is sucked, the material can be sucked by using the pressure or by the reverse rotation of the screw motor. As a result, the material supply part 63 and the material suction part 62 are formed by the same pipe.

In addition, the above process can be performed by the central processing unit 10 controlling the operation of the screw motor and the pressurizing pump. That is, the ejection amount can be finely controlled using the rotational force of the screw, and the material suction function can also be added through the reverse rotation.

That is, although the supply portion of the material and the material intake port may be distinguished, the material supply portion and the material intake port may have an integrated structure.

There is also a head used when using a material with a high viscosity of 50,000 cp or more, in which case a gear pump is also used.

- Discharge pressure and suction pressure -

The ejection pressure of the material used in the present invention is about 200 kPa, but it is not necessarily limited to the value of 200 kPa. The suction pressure may be expressed as a degree of vacuum but may also be expressed as a pressure value. The suction pressure of the material used in the present invention is about -40 kPa, but it is not limited to -40 kPa.

The suction time varies depending on the path condition, but it can be as short as 100 msec, but it can be this suction time during the jump time.

- Resin used -

In this case, a cleaner, which is a solvent capable of dissolving resin streams, can be used. That is, alcohols such as methanol, ethanol, and isopropyl alcohol and amines can be used. In some cases, a strong solvent system such as toluene can be used, Alcohol, such as methanol, ethanol, and isopropyl alcohol, may be effective at home.

In the present invention, an ultraviolet curing resin is used as a printing material. That is, it includes an epoxy-acrylate oligomer modified with an alcohol soluble cellulose derivative and a hydrophilic acrylic monomer. Ethoxylated hexanediol diacrylate, Ethoxylated Bisphenol A diacrylate, Polyethyene glycol acrylate, etc. may be used as the EO (ethylene oxide) adduct, and Propoxylated neopentyl glycol (PO) diacrylate, propoxylated glyceryl acrylate, propoxylated allyl methacrylate, propoxylated trimethylolpropane triacrylate, and the like. Other amines, methoxy compounds, alkoxylated acrylate, and urethane acrylate may be included.

At this time, the ultraviolet ray hardening resin that can be used as a printing material in the present invention can be applied to the present invention as long as it is an ordinary ultraviolet ray hardening resin other than the above-mentioned ones.

9 is a diagram of an embodiment showing a system block diagram of the present invention,

The present invention is characterized in that an ink jet head 100 for printing a touch panel electrode and a printer head 60 coated on a touch panel electrode to provide insulation and adhesion of electrodes are mounted on a single multi head.

To this end, a driving unit 12 for controlling the movement and operation of the ink jet head 100 is provided, and a valve control unit 14 for controlling the movement and operation of the printer head 60 is provided. The CPU 11 controls the movement and operation of the valve control unit 14 and the valve control unit 14. The interface unit 13, which is an input device through which the operating operator can control the apparatus, .

In addition, although not shown in the drawings of the present invention, a memory unit is additionally provided, and control algorithms and pattern shapes for moving the driving unit 12 and the valve control unit 14 are stored in the memory unit.

On the other hand, an LED element 10 including both an ultraviolet curing LED element 10-1 and an infrared element 10-2 for emitting heat is further provided.

The steps of printing the touch panel electrode using the system of the present invention are as follows.

(1) The CPU selects a predetermined algorithm and a predetermined pattern shape to control the driving unit 12, and the ink jet head 100 prints a metal electrode on a substrate (glass or plastic). At this time, it is stored in the memory unit and printed in the pattern shape selected by the CPU.

(2) After printing the metal electrode, the CPU drives the infrared LED element to emit heat so that the metal electrode is rapidly cured.

(3) The CPU drives the valve control section 14 to print the resin insulating layer on the metal electrode using the printer head 60. [ At this time, it is stored in the memory unit and printed in the pattern shape selected by the CPU.

On the other hand, the resin insulating layer prints a wider width than the metal electrode. For example, the width of the metal electrode is 0.1 mm, the width of the resin insulating layer is 0.12 which is increased by 20%, and the resin insulating layer prints thicker than the metal electrode. For example, if the thickness of the metal electrode is 0.1 micrometer, the resin insulating layer is coated to a thickness of 1 micron or more, which is about 10 times.

(4) After the resin insulating layer is printed, the ultraviolet LED element is driven to cure the insulating layer.

In the above-described four-step process, the multi-head moves along each path.

10 is a view showing an embodiment showing the configuration of the multi-head of the present invention.

The multi-head 300 of the present invention is provided with an inkjet head 100, a printer head 60, an ultraviolet LED element 10-1, and an infrared LED element 10-2, respectively. The multi-head 300 can be moved left and right as shown by an arrow in FIG.

When the electrode of the touch panel is printed on the substrate, there is a printing progress area where the electrodes are printed on the entire substrate. Therefore, the multi-head 300 moves left and right in the arrow direction, .

The steps are as follows.

(1) The multi-head moves left and right to position the ink jet head 100 on the printing progress area and print the metal electrode. The term " printing " means that the head moves in a pattern-shaped path.

(2) The multi-head moves to the left and right to position the infrared LED element on the printing progress area and drive the LED element. Since the LED element moves along the path of the pattern shape, heat is sprayed, As a result,

(3) The multi-head moves left and right to position the printer head 60 on the printing progress area and print the insulating layer. The term " printing " means that the head moves in a pattern path.

(4) The multi-head moves left and right to position the ultraviolet LED element on the printing progress area and drive the ultraviolet LED element. The LED element moves in a pattern-shaped path, Cure quickly.

On the other hand, the CPU controls the multi-head to move left and right by a predetermined algorithm.

100: inkjet head 60: printer head
10-2: Infrared LED element 10-1: Ultraviolet ray
11: CPU 13:
12: driving part 14: valve control part

Claims (2)

A driving unit 12 for controlling the movement and operation of the ink jet head, a printer head 60 for printing an insulating layer, and a valve control unit (not shown) for controlling the movement and operation of the printer head 14,
And a CPU 11 for controlling the movement and operation of the driving unit 12 and the valve control unit 14,
The LED device 10 further includes an ultraviolet curing LED element 10-1 and an infrared element 10-2 for emitting heat,
The ink jet head 100 prints a metal electrode on a substrate (glass or plastic), and the CPU drives the infrared LED element after printing the metal electrode so that the metal electrode is rapidly cured by injecting heat,
Characterized in that a resin insulating layer is printed on the metal electrode using the printer head (60), and the insulating layer is printed, and then the ultraviolet LED element is driven to cure the insulating layer.
The method according to claim 1,
The multi head 300 is further provided and the ink jet head 100, the printer head 60, the ultraviolet LED element 10-1 and the infrared LED element 10-2 are respectively provided , And the multi-head (300) is movable left and right.

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