KR101850652B1 - Industrial touch screen panel and manufacturing method - Google Patents

Abstract

The present invention relates to an industrial touch screen panel capable of manufacturing an industrial medium and large touch screen panel by using a transparent conductive material (ITO) with excellent visibility, and a manufacture method thereof. The manufacture method manufactures the industrial touch screen touch screen panel by including: an exposure process of forming a view pattern on an ITO film; a bezel pattern forming step of forming a bezel pattern on the ITO film; a sheet laminating process of forming a sensor by laminating an optical clear adhesive (OCA) film to the ITO film having the bezel pattern; a cell cutting process of processing the outer shape of the sensor; an auto clave process of deaerating fine air bubbles of the sensor; an ACF temporary compressing process of temporarily compressing an ACF to a flexible printed circuit board (FPCB); a flexible printed circuit (FPC) bonding process of bonding the sensor deaerated to the FPCB with the ACF; and a cell laminating process of completing the touch screen panel by bonding glass to a formed product.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial touch screen panel,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an industrial touch screen panel and a method of manufacturing the same, and more particularly, to an industrial touch screen panel using an ITO having excellent visibility to manufacture an industrial touch screen panel.

In general, the demand for touch screens is increasing as the application of touch screens to information communication devices such as smart phones and tablet PCs is increasing. The touch screen is an information display device equipped with a touch panel which is an input device for recognizing its position when it is contacted with a hand or a tool. The input method of the touch panel is to grasp its position by directly touching a character or a specific position on the screen And recognize it through software.

The types of touch panels can be divided into capacitive type and resistive type.

In the electrostatic capacitance type, transparent electrodes on the substrate are arranged in plural lines in X and Y axes crossing each other, and when a detection signal is applied to one of the electrodes, a certain electrostatic capacitance layer is formed in the insulating layer and a signal is transmitted through the other electrode And calculates the size of the signal to detect the position.

In the resistive type, two substrates having a transparent electrode layer coated thereon are bonded together such that the transparent electrode layer faces each other on the inner surface. At this time, when a substrate is touched by a finger or a pen in a state where an electrical signal for position detection is applied on one of the transparent electrodes, the transparent electrode layer of the upper substrate contacts the transparent electrode layer of the lower substrate, A signal is detected, and a position touched is determined using the magnitude of the detected electrical signal.

In the above-described touch panel, the electrostatic capacitance type can be divided into a surface type and a projected type, but most of them use a projected capacitive type (PCAP). ITO (Indium Tin Oxide) is mainly used for the PCAP method, and it is divided into glass, film, and integrated type according to the type of the substrate. In general, in the early days of the smartphone, film-based PCAP technology could be said to be the mainstream technology, but gradually it is increasingly implemented in an integral type or in a cover glass.

In particular, the PCAP touch panel has excellent strength and durability by applying a protective material to the surface, has a high transmittance, and is applicable to curved and flexible displays due to its ductility.

Conventional techniques for the PCAP-type touch panel are disclosed in Patent Documents 1 to 2 below.

The conventional technique disclosed in Patent Document 1 is a process for attaching a processed product on which a plurality of transparent conductive films are deposited using a double-sided adhesive film to a heat resistant jig plate, a process for attaching a photosensitive material A step of forming a pattern on the transparent conductive film on the work surface, a step of separating the processed product from the heat resistant jig plate, Thus, a plurality of touch panels, which function as a touch sensor, are simultaneously manufactured in a touch screen in which a display function and a touch input function are combined.

In addition, the prior art disclosed in Patent Document 2 uses a roll-to-roll handling system including a step of printing a first pattern on a first side of a polarizing film by a first flexo plate and a first ink, A method of manufacturing a touch sensor is provided.

The touch screen structure manufactured by this method realizes a capacitive touch sensor composed of a polarizer film or an analyzer.

Korean Patent Laid-open Publication No. 10-2015-0099096 (published on Aug. 31, 2015) (Method for manufacturing touch panel using heat resistant jig) Korean Patent Publication No. 10-2014-0088579 (published Apr. 10, 2014) (Polarizer Capacitive Touch Screen)

However, in the related art as described above, the outer portion of the touch panel is wired using an AG to reduce the loss of resistance. At this time, the wiring is done in various ways. When the wiring size becomes larger, the talking bezel generally becomes larger. In the middle and large touch screen panel, the wiring width becomes large due to a problem of production yield, and the bezel becomes large. Thus, there is a limitation in applying the above-described conventional technology to the manufacture of middle and large touch screen panels .

In addition, IR (Infrared) and Metalmesh are the most commonly used methods in the conventional middle and large sized industrial touch screen. Although the IR method can implement a touch of a large inch by using infrared rays, it is difficult to implement the design, There is a disadvantage of a malfunction due to a foreign object or a malfunction due to a foreign substance. In addition, Metalmesh is suitable for a large touch screen due to its low resistance, but it has a disadvantage that its visibility is very bad due to the fine metal lines in the view area.

In addition, the conventional method of manufacturing a touch screen panel using ITO is disadvantageous in that it is not suitable for a touch screen panel having a curved shape because the ITO material is a crystalline material and is fragile. In the case of an ITO film used for bending, It has a disadvantage that it is not suitable for a medium and large touch screen due to its high resistance.

DISCLOSURE Technical Problem Accordingly, the present invention has been made in view of the above problems occurring in the prior art, and it is an object of the present invention to provide an industrial touch screen capable of manufacturing an industrial mid- to large-sized touch screen panel using a transparent conductive material (ITO) And to provide a panel manufacturing method.

It is another object of the present invention to provide an industrial touchscreen manufacturing method capable of manufacturing a middle- or large-sized touchscreen panel using an ITO film and providing a flexible and reliable touchscreen panel.

It is another object of the present invention to provide an industrial touchscreen manufacturing method for providing a mid-sized touchscreen panel having a narrow bazel.

According to an aspect of the present invention, there is provided a method of manufacturing an industrial touch screen panel, including: (a) an exposure step of forming a view pattern on a transparent conductive film (ITO) film; (b) a bezel pattern forming step of forming a bezel pattern on the ITO film after the step (a); (c) a sheet laminating step of forming a sensor by laminating an optical clear adhesive (OCA) on the ITO film on which the bezel pattern is formed; (d) a cell cutting process for processing the sensor contour after the step (c); (e) an autoclave process for defoaming the fine bubbles of the sensor after the step (d); (f) an ACF pressing step of pressing a conductive tape (ACF) onto a flexible printed circuit board (FPCB); (g) an FPC (Flexible Printed Circuit) bonding process for bonding the sensor defoamed in the step (e) to the flexible printed circuit board to which the conductive tape is attached; And (h) completing a touch screen panel by attaching a glass to the product formed in the step (g).

In the above-described step (a), (a1) an ITO film is annealed to crystallize ITO; (a2) forming a view pattern by photoetching the ITO-crystallized ITO film.

The step (b) of forming the bezel pattern may include: (b1) printing a bezel AG paste on the ITO film; (b2) curing a sheet on which the AG paste is printed; (b3) forming wiring for each channel in the cured sheet.

In the step (b3), the bezel pattern is formed by laser etching to minimize the size of the bezel.

The sheet laminating step (c) comprises: (c1) laminating an intermediate transparent bonding film to the upper ITO film; (c2) laminating the sheet prepared in (c1) and the lower ITO film; (c3) bonding the sheet prepared in the step (c2) and the upper transparent bonding film.

The cell cutting step (d) is characterized in that the external shape of the sensor sheet is machined by a CO2 laser to process the external shape of the sensor.

According to another aspect of the present invention, there is provided a method of manufacturing an industrial touch screen panel, comprising the steps of: (a) forming a view pattern on a transparent conductive film (ITO) film; (b) a bezel pattern forming step of forming a bezel pattern on the ITO film after the step (a); (c) a sheet laminating step of forming a sensor by laminating an optical clear adhesive (OCA) on the ITO film on which the bezel pattern is formed; (d) a cell cutting process for processing the sensor contour after the step (c); (e) an autoclave process for defoaming the fine bubbles of the sensor after the step (d); (f) an ACF pressing step of pressing a conductive tape (ACF) onto a flexible printed circuit board (FPCB); (g) an FPC (Flexible Printed Circuit) bonding process for bonding the sensor defoamed in the step (e) to the flexible printed circuit board to which the conductive tape is attached; And (h) completing a touch screen panel by attaching a glass to the product formed in the step (g).

The view pattern forming step (a) may include: (a1) crystallizing the ITO by annealing the ITO film; (a2) printing and curing an AG paste on the ITO film; (a3) forming a view pattern by laser etching the ITO film on which the AG paste is printed.

According to the present invention, there is an advantage that a large-sized industrial touch screen panel can be manufactured by using a transparent conductive material (ITO) having excellent visibility and mass productivity.

In addition, according to the present invention, there is also an advantage that a touch screen panel is manufactured using ITO material, and a flexible and reliable touch screen panel can be provided.

Also, according to the present invention, it is possible to provide a middle- or large-sized touch screen panel having a narrow bezel capable of producing a high yield.

FIG. 1 is a cross-sectional view illustrating a manufacturing process of an industrial touch screen panel according to a first embodiment of the present invention.
FIG. 2 is a process diagram of the exposure process of FIG. 1,
FIG. 3 is a process diagram of the bezel pattern forming process of FIG. 1,
FIG. 4 is a process chart of the sheet laminating process of FIG. 1,
FIG. 5 is a cross-sectional view of a second embodiment of a manufacturing process of an industrial touch screen panel according to the present invention,
FIG. 6 is a process chart of an embodiment of a view pattern forming process of FIG. 5; FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an industrial touch screen panel and a method of manufacturing the same according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

≪ Example 1 >

1 is a process diagram showing a first embodiment of a method for manufacturing an industrial touch screen panel according to a preferred embodiment of the present invention.

As shown in FIG. 1, the first embodiment of the method for manufacturing an industrial touch screen panel according to the present invention includes (a) an exposure step (S10) for forming a view pattern on a transparent conductive film (ITO) film, A step (S20) of forming a bezel pattern on the ITO film after the step (a), (c) a step of forming a bezel pattern on the ITO film on which the bezel pattern is formed by using a transparent adhesive film (OCA) (D) a cell cutting step (S40) of processing the sensor contour after the step (c); (e) a step (d) An ACF pressurizing process S60 for pressurizing a conductive tape ACF to a flexible printed circuit board (FPCB), (b) an autoclave process S60 for defoaming fine bubbles of the sensor, (g) an FPC (F) for bonding a sensor defoamed in the step (e) to a flexible printed circuit board to which the conductive tape is attached and a cell laminating process (S80) for completing a touch screen panel by attaching a glass to a product formed by the process (g).

2, the exposure step (a) includes the steps of (a1) annealing the ITO film to crystallize the ITO (S11), (a2) performing the photoetching (S12) forming a view pattern.

3, the bezel pattern forming step (b) includes the steps of (b1) printing a bezel AG paste on the ITO film (step S21), (b2) (Step S22); and (b3) forming a channel-specific wiring on the cured sheet (step S23).

The step (b3) preferably forms a bezel pattern by laser etching to minimize the size of the bezel.

4, (c1) a step (S31) of laminating an intermediate transparent bonding film (MID OCA) on the upper ITO film (TOP ITO), (c2) c3) a step (S32) of laminating a sheet (TOP ITO + MID OCA) and a lower ITO film (BTM ITO) prepared in step (c1) ) And an upper transparent bonding film (TOP OCA).

In addition, in the cell cutting step (d), the outline of the sensor sheet is preferably machined by a CO2 laser to process the sensor contour.

A first embodiment of the method for manufacturing an industrial touch screen panel according to the present invention will be described in detail.

First, in step S10, a view pattern is formed on a transparent conductive film (ITO) film.

As shown in FIG. 2, the ITO film was annealed at 110 ± 10 ° C., 1.0 ± 0.2 m / min, and 80 ± 10 mj light quantity conditions using annealing equipment in step S11 to crystallize ITO The ITO film having the ITO crystallized therein was grown at a temperature of 29 ± 2 ° C. and 2.0 ± 0.25 m / min in step S12, and then photoetching was performed at 40 ± 3 ° C. and 2.0 ± 0.25 m / min. Thereby forming a view pattern.

Next, in step S20, a bezel pattern is formed on the ITO film.

3, the bezel AG paste is printed on the ITO film at a speed of 40 +/- 10 mm / sec for 50 +/- 10 sec. Next, in step S22, the sheet on which the AG paste is printed is cured at a temperature of 140 ± 5 ° C and at a speed of 1.1 ± 0.3 m / min. Next, in step S23, channel-specific wiring is formed on the cured sheet under conditions of 60 占 power and 3000 占 500mm / sec speed. Here, in step S23, it is preferable to form a bezel pattern by laser etching to minimize the size of the bezel.

When laser etching is used in this manner, the problem of large relative size of the bezel due to the large wiring width due to the production yield problem in the middle and large touch screen panel can be solved.

Next, in step S30, the ITO film on which the bezel pattern is formed is subjected to a sheet lamination process in which OCA (Optical Clear Adhesive) is stuck to the ITO film at a speed of 60 ± 10 sec and 100 ± 20 mm / sec. .

4, the intermediate transparent bonding film (MID OCA) is laminated on the upper ITO film (TOP ITO) in step S31, and the sheet (TOP ITO + MID OCA And the bottom transparent ITO film (BTM ITO), and the upper transparent bonding film (TOP OCA) is laminated on the sheet (TOP ITO + MID OCA + BTM ITO) prepared in step S33.

Next, in step S40, a cell cutting process is performed in which a sensor outer shape is formed by using a CO2 laser at a power of 70 ± 20% to process a sensor outer shape.

In step S50, an autoclave process is performed in which the micro bubbles of the sensor completed in step S40 are defoamed at a temperature of 50 ± 10 ° C and a pressure of 7.0 ± 0.5 kgf.

Next, in step S60, an ACF pressing step of pressing a conductive tape (ACF) onto a flexible printed circuit board (FPCB) at a temperature of 70 ± 10 ° C. and a pressure of 2.5 ± 0.5 MPa is performed.

Next, in step S70, a FPC (Flexible Printed Circuit) bonding process is performed in which the sensor defoated in the above process is bonded to the flexible printed circuit board on which the conductive tape is attached at a temperature of 155 ± 5 ° C and a pressure of 2.5 ± 0.5 MPa.

Finally, in step S80, a product formed through the bonding process is attached to a glass at a speed of 100 ± 20 mm / sec for 70 ± 10 sec using a cell laminating machine to complete a touch screen panel.

≪ Example 2 >

5 is a process diagram showing a second embodiment of a method for manufacturing an industrial touch screen panel according to a preferred embodiment of the present invention.

As shown in FIG. 5, the second embodiment of the method for manufacturing an industrial touch screen panel according to the present invention comprises the steps of: (a) a view pattern forming step (S90) of forming a view pattern on a transparent conductive film (ITO) (b) forming a bezel pattern on the ITO film after the step (a); (c) forming a bezel pattern on the ITO film having the bezel pattern formed thereon by using an optical clear adhesive (OCA) (D) a cell cutting step (S40) of processing the sensor contour after the step (c); (e) the step (d) An auto-clamping step (S50) of defrosting the fine bubbles of the sensor after the process (f) an ACF press-fitting step (f) of pressing a conductive tape (ACF) onto a flexible printed circuit board S60), (g) bonding the sensor defoamed in the step (e) to the flexible printed circuit board to which the conductive tape is attached Includes a cell lamination step (S80) to complete the touch screen panel is attached to glass (Glass) the product formed by the FPC (Flexible Printed Circuit) bonding step (S70), and (h) the (g) step.

6, the view pattern forming step (a) includes the steps of: (a1) crystallizing ITO by annealing the ITO film (S91), (a2) applying an AG paste to the ITO film, (S92); (a3) forming a view pattern by laser etching the ITO film on which the AG paste is printed; and (S93).

The second embodiment of the method for manufacturing an industrial touch screen panel according to the present invention is different from the first embodiment only in the process of forming a view pattern, The order and operation of the lamination process S30, the cell cutting process S40, the auto clave process S50, the ACF pressure application process S60, the FPC bonding process S70 and the cell lamination process S80 are the same.

Therefore, only the view pattern forming step will be described below, and the following steps are the same as the order and the processing method of the steps described in the first embodiment described above. Therefore, in order to avoid redundant explanation, Will be replaced with the description of < Embodiment 1 >.

First, in step S90, a view pattern is formed on a transparent conductive film (ITO) film.

As shown in FIG. 6, in step S91, an ITO film is annealed at 110 ± 10 ° C., 1.0 ± 0.2 m / min, and 80 ± 10 mj light quantity using an annealing apparatus to crystallize ITO And the crystallized ITO film is grown at a temperature of 29 ± 2 ° C and 2.0 ± 0.25 m / min.

Thereafter, in step S92, the view AG paste is printed on the ITO film at a speed of 40 ± 10 mm / sec for 50 ± 10 sec., And the sheet on which the AG paste is printed is subjected to a heat treatment at a temperature of 140 ± 5 ° C, And cured at a speed of 0.3 m / min.

In step S93, a view pattern is formed on the cured sheet by laser etching at a speed of 60 ± 10 power and a speed of 3000 ± 500 mm / sec.

By forming the view pattern using the laser etching as described above, it is possible to improve the disadvantage that the existing photo large equipment is expensive and is not suitable for small quantity production of various kinds of products, and the laser spot has a merit of 30 mu m so that the pattern visibility is excellent.

After forming the view pattern, the process proceeds to the step of forming the bezel pattern (S20), and the subsequent steps are sequentially performed to manufacture the industrial touch screen panel.

According to the present invention, it is possible to provide a middle- or large-sized touch screen panel having a narrow bazel capable of manufacturing an industrial large-sized touch screen panel using a transparent conductive material (ITO) excellent in visibility and mass productivity and capable of producing a high- .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It is obvious to those who have.

S10: Exposure step
S20: Bezel pattern forming process
S30: Sheet laminating process
S40: Cell cutting process
S50: autoclave process
S60: ACF pressurization process
S70: FPC bonding process
S80: Cell laminating process
S90: View pattern formation process

Claims (10)

A method of manufacturing an industrial mid-sized touch screen panel,
(a) an exposure step of forming a view pattern on a transparent conductive film (ITO) film;
(b) a bezel pattern forming step of forming a bezel pattern on the ITO film after the step (a);
(c) a sheet laminating step of forming a sensor by laminating an optical clear adhesive (OCA) on the ITO film on which the bezel pattern is formed;
(d) a cell cutting process for processing the sensor contour after the step (c);
(e) an autoclave process for defoaming the fine bubbles of the sensor after the step (d);
(f) an ACF pressing step of pressing a conductive tape (ACF) onto a flexible printed circuit board (FPCB);
(g) an FPC (Flexible Printed Circuit) bonding process for bonding the sensor defoamed in the step (e) to the flexible printed circuit board to which the conductive tape is attached; And
(h) a cell laminating step of completing the touch screen panel by attaching a glass to the product formed by the step (g).
The method of claim 1, wherein the exposing step (a) includes the steps of: (a1) crystallizing ITO by annealing the ITO film; (a2) photoetching the ITO-crystallized ITO film to form a view pattern.
The method of claim 1, wherein the bezel pattern forming step (b) comprises: (b1) printing a bezel AG paste on an ITO film; (b2) curing a sheet on which the AG paste is printed; (b3) forming a channel-specific wiring on the cured sheet.
The method of claim 3, wherein step (b3) comprises forming a bezel pattern through laser etching to minimize the size of the bezel.
The method of claim 1, wherein the sheet laminating step (c) comprises: (c1) laminating an intermediate transparent bonding film on the upper ITO film; (c2) laminating the sheet prepared in (c1) and the lower ITO film; (c3) joining the sheet and the upper transparent bonding film produced in the step (c2).
The method of manufacturing an industrial touch screen panel according to claim 1, wherein the cell cutting step (d) comprises machining the external shape of the sensor sheet by using a CO2 laser.
delete A method of manufacturing an industrial mid-sized touch screen panel,
(a) a view pattern forming step of forming a view pattern on a transparent conductive film (ITO) film;
(b) a bezel pattern forming step of forming a bezel pattern on the ITO film after the step (a);
(c) a sheet laminating step of forming a sensor by laminating an optical clear adhesive (OCA) on the ITO film on which the bezel pattern is formed;
(d) a cell cutting process for processing the sensor contour after the step (c);
(e) an autoclave process for defoaming the fine bubbles of the sensor after the step (d);
(f) an ACF pressing step of pressing a conductive tape (ACF) onto a flexible printed circuit board (FPCB);
(g) an FPC (Flexible Printed Circuit) bonding process for bonding the sensor defoamed in the step (e) to the flexible printed circuit board to which the conductive tape is attached; And
(h) a cell laminating step of completing the touch screen panel by attaching a glass to the product formed by the step (g).
[8] The method according to claim 8, wherein the view pattern forming step (a) comprises: (a1) crystallizing ITO by annealing the ITO film; (a2) printing and curing an AG paste on the ITO film; (a3) forming a view pattern by laser etching the ITO film on which the AG paste is printed.


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