KR101426077B1 - touch screen panel - Google Patents

Abstract

The present invention relates to a touchscreen panel and, more specifically, to a touchscreen panel. The touchscreen panel includes: a transparent substrate; a transparent electrode layer in which a first sensing electrode is formed by connecting a plurality of first sensing cells, arranged on the transparent substrate in a line, by a connecting pattern, and in which a second sensing electrode is formed by connecting a plurality of second sensing cells, arranged on the transparent substrate in a line not to overlap with the first sensing cells, by a bridge pattern, wherein the second sensing cells are connected to each other with an insulating pattern interposed therebetween such that the bridge pattern cannot be in contact with the connecting pattern; a metal electrode layer which includes an electrode pad connected to a flexible printed circuit board, which is formed by gathering a first bus electrode and a second bus electrode which are respectively connected to the first sensing electrode and the second sensing electrode of the transparent electrode layer and which are wired along the edge of the transparent substrate; a blocking part which covers the electrode pad of the metal electrode layer not to be exposed to the outside; and a connecting part which electrically connects the electrode pad with the flexible printed circuit board by passing through the blocking part. Accordingly, the electrode pad connected to the flexible printed circuit board can be covered with the blocking part not to be exposed to the outside to block the electrode pad made of metal from being in contact with a material, such as salt water, accelerating the corrosion of metal, thereby preventing the electrode pad from corroding. This can prevent the performance of the touchscreen panel from being deteriorated or the touchscreen panel from being malfunctioned.

Description

A touch screen panel {touch screen panel}

The present invention relates to a touch screen panel. More particularly, the present invention relates to a touch screen panel, and more particularly, to a touch screen panel in which a shielding portion for enclosing the electrode pad is formed so that electrode pads of a metal electrode layer connected to a first sensing electrode and a second sensing electrode of a transparent electrode layer are not exposed to the outside, The present invention relates to a touch screen panel capable of preventing electrode pads from being corroded.

With the development of computer technology, computer-based systems for various purposes are being developed and there is a growing demand for cleanliness, speed and convenience in using such systems.

In addition, there is a growing need for an input device capable of easily operating a device in a miniaturized and mobile computer or a multimedia device, and an input device using a conventional keyboard or a mouse is limited in terms of movement and use, A touch screen panel is used as an input device that can be directly input by a hand or a pen.

Such a touch screen panel is an input device for inputting a user's command by selecting an instruction content displayed on a screen of a video display device or the like as a human hand or an object, and has recently been applied to various information processing devices. Such a touch screen panel is simple in operation, has little malfunction, can input information without any other input device, and is manufactured in an integrated manner with an image display device to enhance the portability of the product.

The touch screen panel is classified into a resistive type, a capacitive type, a surface ultrasonic type, and an infrared type depending on the method of sensing the contact portion, and a resistive type and a capacitive type are mainly used.

The resistance film method is a structure in which two sheets of substrates on which transparent electrodes are coated are bonded together. When the upper and lower electrode layers come into contact with each other by applying pressure with a finger or a pen, an electrical signal is generated to recognize the position. In the case of such a resistive film method, the price is low, the accuracy is high, and it is advantageous for miniaturization, but it is difficult to manufacture robustly because the touch is recognized by physically contacting two substrates.

On the other hand, the electrostatic capacitance type uses a transparent substrate coated with a thin conductive material. When a certain amount of current flows on the surface of the transparent substrate and a user touches the surface of the coated transparent substrate, a certain amount of current is absorbed And recognizes the changed portion of the amount of current on the contact surface, thereby confirming the touched portion.

In order to accurately determine the contact position on the contact surface, the touch screen panel has a transparent electrode layer formed of a first sensing cell and a second sensing cell on a transparent substrate for recognizing the X-axis coordinate and the Y-axis coordinate. This will be described with reference to Fig.

1 is a schematic view of a transparent substrate of a conventional touch screen panel. 1, a first sensing electrode 10 including a plurality of first sensing cells 12 arranged in a row in the X-axis direction of the transparent substrate 1 is formed, A second sensing electrode 20 including a plurality of second sensing cells 22 arranged in a line in the Y-axis direction of the transparent substrate 1 is formed so as not to overlap the first sensing electrode 12.

At this time, the first sensing cell 12 is formed with a connection pattern 14 for electrically connecting two neighboring first sensing cells 12, and the first sensing cell 12 and the connection pattern 14 Are arranged in a plurality alternately.

A second sensing cell 22 is formed on the transparent substrate so as not to overlap with the first sensing cell 12, and the second sensing cell 22 includes two adjacent sensing cells 22, A bridge pattern 24 for electrically connecting the electrodes 22 is formed. At this time, the bridge pattern 24 connects the two second sensing cells 22 on the insulation pattern 30 so as to cross the connection pattern 14 without contacting the connection pattern 14.

The first sensing cell 12 and the second sensing cell 22 are formed in a rhombic shape except for forming the both ends of the first sensing cell 12 and the second sensing cell 22, And the second sensing electrode 20 including the plurality of second sensing cells 22 are connected to the first wiring portion 40 and the second wiring portion 50, respectively.

The second wiring part 50 connected to the first wiring part 40 and the second sensing electrode 20 connected to the first sensing electrode 10 is formed along the edge of the transparent substrate, The wiring portion 40 and the second wiring portion 50 are connected to the electrode pad 60 which is gathered at one side of the transparent substrate and is electrically connected to the flexible printed circuit board (FPCB) 70. In particular, the electrode pad 60 including the first wiring portion 40 and the second wiring portion 50 is made of a single metal such as Al, Cu, Mo, Ni, Ag, or Pd, or an alloy thereof.

However, in the conventional touch screen panel having the above-described structure, the electrode pad 60 connected to the flexible printed circuit board 70 is exposed to the outside, which may easily corrode.

Particularly, after the touch screen panel is manufactured, various tests are performed to test the reliability of the product. For example, when the user's sweat is sprayed on the touch screen panel to create an environment in which the user touches the touch screen panel Inspection will be carried out.

At this time, since the brine contains a large amount of chlorine (Cl) component, when the electrode pad 60 made of metal is exposed to the chlorine component, the electrode pad 60 is corroded and the electrode pad 60 ) May degrade the performance of the touch screen panel or cause the incapability of operation, making it difficult to pass the reliability test.

Korea Patent No. 1118727 (2012.02.14) "Thin-film multi-touch screen panel and its manufacturing method"

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a flexible printed circuit board (FPCB) which is electrically connected to a first sensing electrode and a second sensing electrode, So that it is possible to prevent deterioration or malfunction of the electrode pad caused by corrosion of the electrode pad.

Another object of the present invention is to protect the first wiring part and the second wiring part connecting the first sensing electrode and the second sensing electrode with the electrode pad from being exposed to the outside, And it is an object of the present invention to provide a touch screen panel capable of preventing the first wiring portion and the second wiring portion from being corroded.

It is a further object of the present invention to provide a method of manufacturing a touch screen panel, which comprises the steps of: forming a shielding portion for preventing an electrode pad from being exposed to the outside, and connecting portions for electrically connecting the electrode pad and the flexible printed circuit board, And a bridging part, so that the electrode pad or the wiring part can be prevented from being corroded without a separate additional step.

According to an aspect of the present invention, there is provided a plasma display panel comprising a transparent substrate, a plurality of first sensing cells arranged in a line on the transparent substrate, A plurality of second sensing cells arranged in a line on a transparent substrate so as not to overlap with the first sensing cell are connected by a bridge pattern to form a second sensing electrode, And a first wiring part and a second wiring part connected to the first sensing electrode and the second sensing electrode of the transparent electrode layer and wired along the edge of the transparent substrate, A metal electrode layer having an electrode pad connected to a circuit board formed thereon, a shielding portion covering the electrode pad of the metal electrode layer so as not to be exposed to the outside, It is achieved by the touch screen panel comprising the pad and the connecting portion of the flexible printed circuit electrically connected to the substrate.

Here, it is preferable that the shielding portion is made of the same material as the insulating pattern.

In addition, it is preferable that the shielding portion is formed with a penetration portion through which the electrode pad is exposed, and the connection portion and the electrode pad are electrically connected through the penetration portion.

The shield may be formed on the electrode pad when the insulation pattern is formed on the second sensing cell.

The shielding portion may include a first shielding portion that surrounds the electrode pad so as not to be exposed to the outside, and a second shielding portion that is connected to the first shielding portion and surrounds the first and second wiring portions so as not to be exposed to the outside Do.

In addition, it is preferable that a penetrating portion is formed in the first shielding portion.

It is preferable that the through-hole has a circular shape, an elliptical shape, or a polygonal shape.

Preferably, the connecting portion is made of the same material as the bridge pattern.

In addition, it is preferable that the connection portion is formed in the shielding portion when the bridge pattern is formed in the second sensing cell.

The touch screen panel according to the present invention has the following various effects.

First, the touch screen panel according to the present invention forms a shielding portion on the upper surface of the electrode pad connected to the flexible printed circuit board, thereby preventing the electrode pad from contacting the material accelerating the corrosion of metal such as brine, It is possible to prevent the performance of the touch screen panel from being reduced or rendered inoperable.

Secondly, the touch screen panel according to the present invention has shielding portions formed on the upper surfaces of the first wiring portion and the second wiring portion, respectively, so that the first wiring portion and the second wiring portion are shielded from being exposed to the outside, It is possible to prevent the wiring portion from being corroded.

Thirdly, the touch screen panel according to the present invention forms the shielding portion and the connection portion at the same time as the process of forming the insulation pattern and the bridge portion, which are the manufacturing process of the touch screen panel, so that the electrode pad or the wiring portion is corroded Can be prevented.

1 is a schematic view of a transparent substrate of a conventional touch screen panel.
2 is an exploded perspective view of a touch screen panel according to the present invention.
3 is a perspective view of a touch screen panel according to the present invention.
4 is an enlarged view showing part A of Fig.
5 is a view for explaining an electrical connection state between the electrode pad of the touch screen panel and the flexible printed circuit board according to the present invention.
6 is a cross-sectional view illustrating a portion of the touch screen panel according to the present invention where electrode pads are formed.
7 is a cross-sectional view illustrating another embodiment of a touch screen panel according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor may properly define the concept of the term to describe its invention in the best possible way And should be construed in accordance with the principles and meanings and concepts consistent with the technical idea of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is an exploded perspective view of a touch screen panel according to the present invention, and FIG. 3 is a perspective view illustrating a touch screen panel according to the present invention.

2 and 3, a touch screen panel according to the present invention includes a transparent substrate 110, a plurality of first sensing cells 122a arranged in a line on the transparent substrate 110, A plurality of second sensing cells 122b are arranged in a line on the transparent substrate 110 so as not to overlap the first sensing cells 122a, The second sensing electrode 122b is connected to the second sensing electrode 120b by the pattern 126 so that the bridge pattern 126 is not in contact with the connection pattern 124, And a second sensing electrode 120b which is connected to the first sensing electrode 120a and the second sensing electrode 120b of the transparent electrode layer 120 and is formed along an edge of the transparent substrate 110, The flexible printed circuit board 140 is connected to the wiring part 132, the second wiring part 134, the first wiring part 132 and the second wiring part 134, A shielding portion 150 which surrounds the electrode pad 130 of the metal electrode layer 130 so as not to be exposed to the outside and an electrode pad 136 which penetrates the shielding portion 150, And a connection part 160 for electrically connecting the flexible printed circuit board 140 to the flexible printed circuit board 140.

The transparent substrate 110 is made of polyethylene terephthalate (PET) or glass. A transparent electrode layer 120 is formed on the transparent substrate 110.

The transparent electrode layer 120 is preferably formed of a material selected from the group consisting of indium tin oxide (ITO), Al-doped zinc oxide (AZO), indium zinc oxide (IZO), zinc oxide (ZnO), antimony doped tin oxide (ATO) -doped Tin Oxide (GZO), Gallium-doped Zinc Oxide (GZO) and the like.

The transparent electrode layer 120 includes a first sensing electrode 120a and a second sensing electrode 120b. The first sensing electrode 120a includes a plurality of first sensing electrodes 120a arranged in a line on the transparent substrate 110, A cell 122a is formed and the first sensing cell 122a and the neighboring first sensing cell 122a are connected by a connection pattern 124. [

The second sensing electrode 120b may include a second sensing cell 122b disposed in a line on the transparent substrate 110 so as not to overlap with the first sensing cell 122a, Are connected by a bridge pattern 126 to a neighboring second sensing cell 122b.

At this time, the bridge pattern 126 connects the two second sensing cells 122b on the insulation pattern 128 so as to cross the connection pattern 124 without contacting the connection pattern 124, And the connection pattern 124 are electrically disconnected from each other.

The first sensing cell 122a and the second sensing cell 122b are formed in a rhombic shape except for forming both ends of the first sensing cell 122a and the second sensing cell 122b. And the second sensing electrode 120b including the plurality of second sensing cells 122b are connected to the first wiring portion 132 and the second wiring portion 134, respectively.

The first wiring part 132 connected to the first sensing electrode 120a and the second wiring part 134 connected to the second sensing electrode 120b are formed along the edge of the transparent substrate 110, The first wiring part 132 and the second wiring part 134 are formed on one side of the transparent substrate 110 to form an electrode pad 136 electrically connected to the flexible printed circuit board (FPCB) 140, (130).

The metal electrode layer 130 composed of the first wiring portion 132, the second wiring portion 134 and the electrode pad 136 is preferably made of a single metal such as Al, Cu, Mo, Ni, Ag, or Pd, .

The electrode pad 136 is connected to the flexible printed circuit board 140. The shield pad 150 is formed on the upper surface of the electrode pad 136 so that the electrode pad 136 is not exposed to the outside . This will be described with reference to Figs. 4 to 6. Fig.

FIG. 4 is an enlarged view showing part A of FIG. 3, FIG. 5 is a view for explaining a state of electrical connection between the electrode pad of the touch screen panel and the flexible printed circuit board according to the present invention, and FIG. Sectional view showing a portion of the screen panel where the electrode pad is formed.

4 to 6, a shielding part 150 is formed on the electrode pad 136 to shield the electrode pad 136 from the outside so that the electrode pad 136 is not exposed to the outside. ). The shielding part 150 is made of the same material as the insulating pattern 128 and the shielding part 150 is formed to have an area larger than the length and width of the electrode pad 136 so that the electrode pad 136 is not exposed to the outside do.

5, the shielding portion 150 may be divided into a plurality of areas so as to individually surround the electrode pads 136. However, in some cases, the shielding portions 150 may be formed in an area where all the electrode pads 136 are formed So that the electrode pad 136 is not exposed to the outside.

The shielding part 150 may be formed on the electrode pad 136 in the process of forming the insulating pattern 128 in the second sensing cell 122b and may be formed in a separate process for forming the shielding part 150 . That is, the shielding part 150 is made of the same material as the insulating pattern 128. When the insulating pattern 128 is formed in the second sensing cell 122b, the shielding part 150 is also connected to the electrode pad 136 A separate process for forming the shielding portion 150 is unnecessary.

A connection portion 160 is formed to penetrate the shielding portion 150 for shielding the electrode pad 136 and electrically connect the electrode pad 136 and the flexible printed circuit board 140, Which is electrically connected to the electrode pad 136 via the first wiring part 132 and the second wiring part 134 connected to the first sensing electrode 120a and the second sensing electrode 120b, (140).

As described above, the shielding part 150 is formed with a penetrating part 152. The penetrating part 152 is preferably formed on the shielding part 150 provided on the electrode pad 136 The upper surface of the electrode pad 136 is exposed through the penetration portion 152 and the upper surface of the electrode pad 136 exposed through the penetration portion 152 is covered with the connection portion 160 formed on the upper surface of the shield 150. [ Lt; / RTI >

The connection part 160 is filled with the electrode pad 136 and the connection part is electrically connected with the connection part 160 formed in the shield 150. The connection part 160 is connected to the flexible printed circuit board 140, So that the electrode pad 136 and the flexible printed circuit board 140 can be electrically connected to each other.

The connecting portion 160 penetrating the shielding portion 150 may be made of the same material as the bridge pattern 126 described above so that the electrode pad 136 and the flexible printed circuit board 140 can be electrically connected to each other. 160 are provided within an area that does not deviate from the shielding portion 150.

Such a connection unit 160 is preferably formed on the shielding unit 150 in the process of forming the bridge pattern 126 in the second sensing cell 122b to perform a separate process for forming the connection unit 160 There is no. That is, the connection unit 160 is formed of the same material as the bridge pattern 126. When the bridge pattern 126 is formed in the second sensing cell 122b, the connection unit 160 is also formed in the shielding unit 150 A separate process for forming the connection portion 160 is unnecessary.

As described above, the shield 150 formed to surround the electrode pad 136 may be formed only at a portion where the electrode pad 136 is located so that the electrode pad 136 is not exposed to the outside, May be formed to surround the first wiring part 132 and the second wiring part 134 connected to the first sensing electrode 120a and the second sensing electrode 120b of the transparent electrode layer 120, .

The shielding portion 150 may be formed of a first shielding portion that surrounds the electrode pad 136 so that the electrode pad 136 is not exposed to the outside and a first shielding portion that surrounds the first wiring portion 132 and the second wiring portion 134 2 shielding portion.

The shielding portion 150 is formed of the first shielding portion and the second shielding portion to cover the entire area of the metal electrode layer 130 including the electrode pad 136 and the first wiring portion 132 and the second wiring portion 134 The shielding part 150 is provided to shield the electrode pad 136, the first wiring part 132 and the second bus electrode 134 from being exposed to the outside.

The first shielding portion shields the electrode pad 136 and the second shielding portion shields the first wiring portion 132 and the second wiring portion 34 The electrode pad 136 made of metal, the first wiring portion 132, and the second wiring portion 134 can be prevented from being corroded.

Particularly, when a test for spraying salt water containing a chlorine (Cl) component is performed on a portion where the electrode pad 136 is formed to test the reliability of the product after the touch screen panel is manufactured, Since the wiring part 132 and the second wiring part 134 are shielded by the shielding part 150 made of the same material as the insulating pattern 128, the electrode pad 136, the first wiring part 132, 2 wiring portion 134 can be stably protected.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

For example, the penetrating portion 152 formed in the shielding portion 150 may be formed in any one of circular, elliptical, and polygonal shapes, or a combination thereof. This will be described with reference to FIG.

7 is a cross-sectional view illustrating another embodiment of a touch screen panel according to the present invention. Referring to the drawings, the penetrating portion 152 formed in the shielding portion 150 has a circular shape, an oval shape, a triangle shape, a star shape as shown in FIGS. 7A to 7E, A plurality of penetrating portions 152 may be formed in the shielding portion 150, or a single penetrating portion 152 may be formed.

The shape of the penetrating portion 152 is formed in the lower portion of the shielding portion 150 so that the electrode pad 136 wrapped around the shielding portion 150 and the flexible printed circuit board 140 positioned at the upper portion of the shielding portion 150 To be connected in a stable state by the connection unit 160 will suffice.

110: transparent substrate 120: transparent electrode layer
120a: first sensing electrode 120b: second sensing electrode
122a: first sensing cell 122b: second sensing cell
124: Connection pattern 126: Bridge pattern
128: insulation pattern 130: metal electrode layer
132: first bus electrode 134: second bus electrode
136: electrode pad 140: flexible printed circuit board
150: shielding part 152: penetrating part
160: Connection

Claims (6)

A transparent substrate;
A plurality of first sensing cells arranged in a line on an upper surface of the transparent substrate are connected by a connection pattern to form a first sensing electrode and a plurality of first sensing electrodes arranged in a line on an upper surface of the transparent substrate, 2 sensing cell is connected by a bridge pattern to form a second sensing electrode, and a second sensing cell is connected to the sensing pattern through an insulating pattern so that the bridge pattern is not in contact with the connection pattern;
A metal electrode layer connected to the first sensing electrode and the second sensing electrode of the transparent electrode layer and having a first wiring portion and a second wiring portion wired along a top edge of the transparent substrate and having an electrode pad connected to the flexible printed circuit board;
A shielding portion formed on an upper surface of the electrode pad so that the electrode pad of the metal electrode layer is not exposed to the outside; And
And a connection portion that penetrates the shield portion and electrically connects the electrode pad and the flexible printed circuit board,
The shielding portion may include a first shielding portion surrounding the electrode pad so as not to be exposed to the outside; And
And a second shielding part covering the first wiring part and the second wiring part so as not to be exposed to the outside.
The method according to claim 1,
Wherein the shielding portion is formed of the same material as the insulating pad together with the insulating pad when the insulating pattern is formed in the second sensing cell.
The method of claim 1, wherein
Wherein the first shielding portion is formed with a penetration portion through which the electrode pad is exposed, and the connection portion and the electrode pad are electrically connected through the penetration portion.
delete delete A transparent substrate;
A plurality of first sensing cells arranged in a line on an upper surface of the transparent substrate are connected by a connection pattern to form a first sensing electrode and a plurality of first sensing electrodes arranged in a line on an upper surface of the transparent substrate, 2 sensing cell is connected by a bridge pattern to form a second sensing electrode, and a second sensing cell is connected to the sensing pattern through an insulating pattern so that the bridge pattern is not in contact with the connection pattern;
A metal electrode layer connected to the first sensing electrode and the second sensing electrode of the transparent electrode layer and having a first wiring portion and a second wiring portion wired along a top edge of the transparent substrate and having an electrode pad connected to the flexible printed circuit board;
A shielding portion formed on an upper surface of the electrode pad so that the electrode pad of the metal electrode layer is not exposed to the outside; And
And a connection portion that penetrates the shield portion and electrically connects the electrode pad and the flexible printed circuit board,
Wherein the connection portion is formed of the same material as the bridge pattern together with the bridge pattern when the bridge pattern is formed in the second sensing cell.

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