KR101303634B1 - Fabricating method of Touch window - Google Patents

Abstract

The present invention relates to a manufacturing process of a touch window. The manufacturing process of a touch window according to the present invention bonds a first adhesive insulating layer film and a first sensing electrode pattern layer on which an electrode pattern is implemented, and the first adhesive insulating layer. Adsorbing to an adsorption stage having an adsorption jig for compensating for the step difference, and adhering a second adhesive insulating layer and a second sensing electrode pattern layer on the first sensing electrode pattern layer.
According to the present invention, in the process of bonding a plurality of films for the manufacture of the touch window laminating the adhesive material layer of the top plate OCA film and the top plate ITO film of the first sensing electrode pattern layer, the step of the first sensing electrode pattern layer The corresponding adsorption jig has an effect of removing bubbles by proceeding the adsorption process.

Description

Manufacturing method of touch window {Fabricating method of Touch window}

The present invention relates to a method and a structure of a touch window.

The touch panel includes a cathode ray tube (CRT), a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP) and an electroluminescent device. It is installed on the display surface of an image display device such as (ELD; Electro Luminescence Device), and the user presses the touch panel while watching the image display device to input predetermined information into the computer.

1 and 2A show main components of such a capacitive touch panel. FIG. 1 shows a plan view of an adhesive structure of such a multilayer structure, and FIG. 2 shows a cross-sectional view taken along the X-ray of FIG. Referring to the drawings, the touch panel has a structure of an upper OCA 50 under the transparent window 10, an upper electrode layer 40, a lower OCA 30, and a lower electrode layer 20 below. In general, the lower portion is bonded to the liquid crystal panel (LCD) 60.

The touch screen panel (TSP) formed by the bonding of the various layers is a connection pad (P) by cutting the upper OCA 50, the upper electrode layer (ITO) 40, the lower OCA 30 for bonding with the FPCB module. ) Is provided with a bonding area (C) is exposed. However, the lower OCA 30 layer used for the adhesion of the upper electrode layer ITO 40 and the lower electrode layer 20 in the multilayer structure described above has bubbles as shown in FIG. 2B on the bonding surface with the upper electrode layer. (P) often occurs and leads to defects.

The present invention has been made to solve the above-described problem, an object of the present invention is the top plate ITO film of the adhesive material layer and the first sensing electrode pattern layer of the top plate OCA film in the process of bonding a plurality of films for the manufacture of the touch window The present invention provides a method of laminating a substrate, and having a suction jig corresponding to a step of the first sensing electrode pattern layer so as to remove bubbles by performing an adsorption process thereafter and a structure of a touch window manufactured accordingly.

As a means for solving the above problems, the present invention is provided with an adsorption jig for adhering the first adhesive insulating layer film and the first sensing electrode pattern layer in which the electrode pattern is implemented and compensating for the step of the first adhesive insulating layer. A method of manufacturing a touch window may be provided by adsorbing on one adsorption stage and adhering a second adhesive insulating layer and a second sensing electrode pattern layer on the first sensing electrode pattern layer.

Particularly, in the above-described manufacturing method, the adsorption on the adsorption stage including the adsorption jig for compensating the step of the first adhesion insulation layer may include a height of the adsorption jig being less than or equal to the height of the first adhesion insulation layer. At least one jig hole is provided on the surface of the suction jig.

In addition, bonding the first adhesive insulating layer film and the first sensing electrode pattern layer having the electrode pattern implemented may further include forming at least one air pass hole penetrating the first sensing electrode pattern layer. have.

In addition, when the second adhesive insulating layer and the second sensing electrode pattern layer are bonded to the first sensing electrode pattern layer, a second air pass hole for simultaneously passing the second adhesive insulating layer through the first sensing electrode pattern layer is formed. The first sensing electrode pattern layer and the second adhesive insulating layer are bonded to each other.

In addition, the first and second air path holes are aligned and bonded to each other in a structure that communicates with each other.

In addition, bonding the second adhesive insulating layer and the second sensing electrode pattern layer on the first sensing electrode pattern layer may be performed on one surface or the one surface of the second adhesive insulating layer in close contact with the second sensing electrode pattern layer. An air pass line pattern formed on the opposite surface is formed and bonded. In this case, when the air pass line pattern is formed on one surface and the other surface of the second adhesive insulating layer, the air pass line pattern may further include a through hole penetrating through one surface of the second adhesive insulating layer.

According to the present invention, when a plurality of films are bonded together for manufacturing a touch window, the lamination of an upper layer ITO film, which is an upper OCA film, and an upper ITO film, which is a first sensing electrode pattern layer, corresponds to a step of the first sensing electrode pattern layer. It is equipped with an adsorption jig to have an effect that can be subsequently adsorbed to remove bubbles.

1 and 2 are a plan view and a main sectional view showing the structure of the touch window.
3 and 4 are comparative process diagrams for illustrating an embodiment according to the present invention.
5 is a conceptual view for explaining the structure of the adsorption jig according to the present invention.
6 to 8 are diagrams and conceptual views for explaining another embodiment according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description with reference to the accompanying drawings, the same reference numerals denote the same elements regardless of the reference numerals, and redundant description thereof will be omitted. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

An object of the present invention is to provide a touch window having a structure for removing bubbles generated between a plurality of layers constituting the touch screen panel (TSP).

With reference to Figures 3 and 4 will be described the principle of bubble generation in the manufacture of the touch window and the manufacturing method and configuration of the present invention for solving it.

3 is a diagram illustrating a general manufacturing method of such a touch window.

(a) First, a process of laminating a film constituting the first adhesive insulating layer 50 and the first sensing electrode pattern layer 40 to be bonded to the transparent window and adsorbing onto the adsorption stage S is performed.

In this case, the first sensing electrode pattern layer 40 is bent into the suction stage by the suction force of the suction stage S. As shown in FIG. That is, the portion of the first adhesive insulating layer 50 has a region that is patterned and cut to expose the connection pad to form the FPC bonding portion, as described in FIG. 2, in which case the first detection is performed by the tolerance of the portion. The electrode pattern layer 40 is bent downward.

Subsequently, when the second adhesive insulating layer 40 is stacked on the upper surface of the first sensing electrode pattern layer 50, an air region in which bubbles are formed is inevitably generated.

In the subsequent step (d), the second sensing electrode pattern layer 20 is stacked, and the lower plate adsorption stage S 2 is adsorbed, and as in (d), the bonding is secured through the roller R, The above-mentioned air bubbles are hardly removed and problems leading to defects are generated.

Accordingly, in the present invention through the method as shown in Figure 4 to solve the problem caused by the bubble generation. That is, the technical gist of the bubble removing according to the present invention prevents the first sensing electrode pattern layer 20 generated in the step (b) from bending due to the adsorption force on the adsorption stage due to the step of the first adhesive insulating layer. In order to, the suction stage is provided with a suction jig for step compensation.

Specifically, the embodiment of FIG. 4 will be described in comparison with FIG. 3, and the film constituting the first adhesive insulating layer 50 and the first sensing electrode pattern layer 40 to be bonded to the transparent window in (a). In the process of laminating and adsorbing on the adsorption stage (S), the adsorption jig (J) protruding on the adsorption stage (S), the adsorption jig is as shown in step (b), the first adhesive insulating layer ( Protruding shape is formed to the same or less than the height of 50, to compensate the step, thereby preventing the first sensing electrode pattern layer 40 from bending downward by the adsorption force of the adsorption stage. do.

To this end, as shown in FIG. 5, the adsorption jig J has jig holes J1 and J2 communicating with the adsorption holes so that the suction force sucked from the adsorption holes (not shown) of the adsorption stage can be transmitted. More preferably, at least one is provided.

That is, in the case where the first adhesive insulating layer 50 and the first sensing electrode pattern layer 40 are adsorbed on the adsorption stage S, the protruding portion of the adsorption jig J is the first adhesive insulating layer 50. By compensating for and supporting the step, the phenomenon in which the first sensing electrode pattern layer 40 is bent downward can be prevented.

Of course, after that (c) the second adhesive insulating layer 30 and the second sensing electrode pattern layer 20 are laminated, the lower plate adsorption stage S 2 is adsorbed, and as in (d ~ e), the roller R ) To strengthen the cementation.

Of course, in contrast to the preferred embodiment according to the present invention described above, the manufacturing process may be implemented in various other embodiments that can maximize the efficiency of the bubble removal process.

Specifically, referring to FIG. 6, the process shown in FIG. 6 is the same as in the above-described embodiment of FIG. 4, except that the adsorption jig J is used in the process (b) and the first process is performed. An air pass hole H may be formed in the sensing electrode pattern layer 40 to prevent bubbles from being formed. In this embodiment, the adsorption jig J compensates for the step of the first adhesive insulating layer 50, and the formation of minute bubbles is also eliminated due to the presence of the air pass hole H, and the first sensing is performed by the adsorption force. It is possible to prevent the electrode pattern layer 40 from bending as shown in FIG.

Alternatively, in another embodiment, referring to FIG. 7, the structure shown in step (b) of FIG. 3 in addition to the gist of the invention that compensates for the step using the adsorption jig J in the adsorption stage S. (A) After bonding the first adhesive insulating layer 50 and the first sensing pattern electrode layer 40 to solve the problem of air generation in the air, (b) a bent portion to generate air (air) The second air pass hole H1 is drilled in the first sensing pattern electrode layer 40 to be formed to halve the suction force at the lower suction stage S to prevent the bending from being formed. Of course, it is also possible to proceed directly to step (c) without drilling the air pass hole H1.

In steps (c) to (d), the first air pass hole H2 penetrating the second adhesive insulating layer 30 and the second sensing pattern electrode layer 30 stacked on the first sensing pattern electrode layer 40 may be formed. H3) is formed, and a bend is formed in the first sensing pattern electrode layer 40 in step (b) to form a bubble movement passage upwardly so as to discharge bubbles generated to the outside.

Of course, as described above, in the case of forming the air pass hole (H1) in step (b), the suction force of the lower suction stage is reduced, so that the degree of bending of the first sensing pattern electrode layer 40 disappears remarkably. Bubbles are discharged to the outside through the first air pass holes H2 and H3 penetrating through the second adhesive insulating layer 30 and the second sensing pattern electrode layer 30 stacked on the first sensing pattern electrode layer 40. The efficiency of removal can be maximized. The first air pass hole and the second air pass hole described above are more preferably aligned in a mutually communicating structure.

In addition to the above-described embodiments described with reference to FIGS. 4, 6, and 7, the second adhesive material layer 30 having the structure shown in FIG. 8 may be used for the efficiency of the bubble removing process in addition to the above-described structure. It may be formed.

That is, on the surface of the second adhesive material layer 30 in steps (c) of FIGS. 4, 6, and 7, the air passages of the intaglio structure, that is, the air pass line patterns Y1 and Y2 are formed. When the air pass line patterns Y1 and Y2 are formed to adhere to a region where air is generated in the first sensing electrode pattern layer 50 in FIG. 3, an autoclave process may be performed later. As a result, the formed bubbles are discharged to the outside along the air pass line patterns Y1 and Y2. The illustrated arrow indicates a direction in which air (bubble) exits. For this purpose, the air pass line pattern is preferably formed such that a pattern of a negative line structure extends to an end of the second adhesive insulating layer. In particular, the air pass line patterns Y1 and Y2 are preferably formed on a surface (one surface) in which the first sensing electrode pattern layer 50 and the second adhesive pattern layer 30 are in close contact with each other. This is because the air movement path can be directly formed in the bubble-formed area and discharged to the outside.

Of course, the air path line patterns Y1 and Y2 may be formed on the other surface of the second adhesive pattern layer 30 which faces the one surface of the second adhesive pattern layer 30. In this case, the second adhesive pattern layer 30 may be used for the efficiency of air movement. At least one through hole may be formed in the groove.

The touch window manufactured according to the embodiment according to the present invention described above has a touch window having a structure in which generation of bubbles generated by the step of the first adhesive insulating layer is remarkably eliminated, and used for each process step. The material is as follows.

For example, the first sensing electrode pattern layer 40 is an electrode formed on one surface of the transparent window 100, and has excellent light transmittance and electrical conductivity indium tin oxide (ITO), indium zinc oxide (IZO), or It may be formed of a material such as zinc oxide (ZnO). The sensing electrode is used as a conductive plate for generating a capacitance change according to the contact of the human body or the like, and may be patterned into a predetermined shape for accurate determination of the number and contact position of the contact input on the transparent window. In an embodiment of the present invention, the ITO forming surface of the ITO film material having ITO formed on one surface of polyethylene resin (polyethylene terephtalete, PET) is patterned, and the patterned ITO film itself is defined as a sensing electrode pattern layer, and the sensing electrode The pattern layer may include an upper electrode layer including a first sensing electrode pattern layer 40 and a second sensing electrode pattern layer 20 which is a lower electrode layer.

In addition, when the transparent window is contacted by the contact of the user's body or the conductive object, a predetermined capacitance change occurs using the contact object and the sensing electrodes 20 and 40 as electrodes and the transparent window 110 as a dielectric. The capacitance change is measured by a control unit connected to the sensing electrode through a wiring unit (not shown), and the control unit is implemented as a mechanism for determining whether a contact occurs, the number of contact inputs and the contact position, etc. using the measured capacitance change. .

The transparent window is PET (polyethylene terephthalate), PC (polycarbonate), PES (polyether sulfone), PI (polyimide), PMMA (PolyMethly MethaAcrylate), which can be applied to high-strength materials such as glass and acrylic resin having excellent light transmittance, or flexible displays. It may be formed of a material such as. The transparent window 100 serves to maintain the appearance of the input unit of the TSP, and at least a part of the area is exposed to the outside to receive contact of a user's body or a conductive object such as a stylus pen. At this time, it is possible to selectively add a protective layer (not shown) in order to prevent damage or destruction of the transparent window due to the contact.

The display device to which the touch screen panel (TSP) is attached may be not only a liquid crystal display, but also an organic light emitting device, a plasma display panel, and the like. . In this case, in order to prevent noise components generated by driving the display device from being transmitted to the touch sensing panel (TSP) to cause a malfunction of the touch sensing panel, a shielding layer may be selectively disposed between the touch sensing panel and the display device. You can also place

The above-described sensing electrode formed on the touch window according to the present invention can be patterned into various shapes as necessary, for example, rectangular, right triangle, diamond, honeycomb, and the like. For example, a single-layer sensing electrode may be formed in a right triangle facing each other on the same plane, or the sensing electrode may be formed long in the vertical direction. Further, after patterning a first sensing electrode layer for determining a first axis (eg, X axis) component of contact on one surface of the transparent window, and forming an adhesive insulating layer on the first sensing electrode layer, the contact It is also possible to pattern the second sensing electrode layer for determining the second axis (e.g., Y axis) component of the to arrange the sensing electrode of the two-layer structure.

In addition, a wiring unit connected to the sensing electrode is provided, and the wiring unit includes a screen display of the touch sensing panel (TSP) and an electronic wiring unit to which the touch sensing panel is applied. It is connected to the controlling unit. In this case, a flexible printed circuit board (FPCB) is used in order to cope with various device shapes inside the electronic device. The circuit pattern formed on the printed circuit board is connected to the connection pad to receive the sensing signal, and it is possible to determine the contact state and the position where the contact has occurred by using the sensing signal.

In the foregoing detailed description of the present invention, specific examples have been described. However, various modifications are possible within the scope of the present invention. The technical idea of the present invention should not be limited to the embodiments of the present invention but should be determined by the equivalents of the claims and the claims.

10: transparent window
20: second sensing electrode pattern layer
30: second adhesive insulating layer
40: first sensing electrode pattern layer
50: first adhesive insulating layer
S: adsorption stage
J: adsorption jig

Claims (7)

Bonding the first adhesive insulating layer and the first sensing electrode pattern layer implemented with the electrode pattern,
An adsorption jig for compensating for the step between the first adhesive insulating layer and the first sensing electrode pattern layer is adsorbed on an adsorption stage,
And a second adhesive insulating layer and a second sensing electrode pattern layer adhered to the first sensing electrode pattern layer.
The method according to claim 1,
When the suction jig for adsorbing the step between the first adhesive insulating layer and the first sensing electrode pattern layer on the suction stage,
The height of the suction jig is formed below the height of the first adhesive insulating layer,
At least one jig hole is provided on the surface of the suction jig manufacturing method of the touch window.
The method according to claim 2,
Bonding the first adhesive insulating layer and the first sensing electrode pattern layer in which the electrode pattern is implemented,
And forming at least one air pass hole penetrating through the first sensing electrode pattern layer.
The method according to claim 2,
When the second adhesive insulating layer and the second sensing electrode pattern layer are bonded to the first sensing electrode pattern layer,
Forming a second air pass hole through the second adhesive insulating layer simultaneously through the first sensing electrode pattern layer;
The method of claim 1, wherein the first sensing electrode pattern layer and the second adhesive insulating layer are bonded to each other.
The method of claim 4,
The first and second air path holes are aligned with each other in a structure in which the touch window manufacturing method of the touch window.
The method according to claim 2 or 3,
Bonding the second adhesive insulating layer and the second sensing electrode pattern layer on the first sensing electrode pattern layer includes:
And forming an air pass line pattern formed on one surface of the second adhesive insulating layer in close contact with the second sensing electrode pattern layer or the other surface facing the one surface.
The method of claim 6,
When the air pass line pattern is formed on one surface and the other surface of the second adhesive insulating layer,
And a through hole penetrating through one surface of the second adhesive insulating layer.

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