KR20120062189A - Electrostatic capacity type touch screen panel - Google Patents

Abstract

PURPOSE: An electrostatic capacitive type TSP(Touch Screen Panel) is provided to reduce scratch of an electronic pattern by reducing impact which is applied to an electrode pattern by a polishing belt in a module cleaning process. CONSTITUTION: An electrode forming unit(A) includes first electrode rows and second electrode rows. A routing line forming unit(B) is formed on a substrate and includes a first routing wire and a second routing wire. First connection patterns(120) are formed within the electrode forming unit. First insulating patterns(130a) are formed on the substrate to expose both sides of the first connection pattern.

Description

Capacitive touch screen panel {ELECTROSTATIC CAPACITY TYPE TOUCH SCREEN PANEL}

The present invention relates to a fixed capacitance type touch screen panel.

Recently, liquid crystal displays, field emission displays (FEDs), plasma display panels (PDPs), electroluminescence devices (ELs), electrophoretic displays, etc. Display devices have been noted for their fast response speed, low power consumption, and excellent color reproduction. Such display devices have been used in various electronic products such as TVs, computer monitors, notebook computers, mobile phones, refrigerator displays, personal digital assistants, and automated teller machines. In general, such display devices configure an interface with a user by using various input devices such as a keyboard, a mouse, and a digitizer. However, using a separate input device such as a keyboard and a mouse has a side that is difficult to increase the completeness of the product by causing inconveniences such as learning how to use and taking up space. Thus, there is an increasing demand for an input device that is convenient, simple and can reduce malfunctions. In accordance with such a request, a touch screen panel has been proposed in which a user directly contacts a screen with a hand or a pen to input information.

The touch screen panel is simple, has fewer malfunctions, can be input without using a separate input device, and can be applied to various display devices due to the convenience that a user can operate quickly and easily through the contents displayed on the screen. It is becoming.

The touch screen panel may include a resistive type (Resistive type) for determining a touched position as a voltage gradient according to a resistance by forming a metal electrode on the upper or lower plate and applying a DC voltage according to a method of sensing a touched portion, Electrostatic capacitive type to detect the touched part by forming the equipotential in the conductive film and detecting the position of the voltage change of the upper and lower panels according to the touch, and reading the LC value induced when the electronic pen touches the conductive film. It may be distinguished by an electromagnetic induction method (Electro Magnetic type) that detects the touched part.

Hereinafter, a capacitive touch screen panel according to the related art will be described with reference to FIGS. 1 to 2B. 1 is a plan view of a capacitive touch screen panel according to the related art, FIG. 2A is a cross-sectional view taken along line II ′ of the touch screen panel shown in FIG. 1, and FIG. 2B is a touch screen shown in FIG. 1. Sectional view taken along the line II-II 'of the panel.

1, 2A, and 2B, a conventional capacitive touch screen panel includes an electrode forming portion A, a routing wiring forming portion B, and a pad portion C formed on a substrate 10, respectively. Include.

The electrode forming portion A may include a plurality of first electrode patterns 40 arranged side by side in a first direction (eg, X-axis direction) on the substrate 10 and first electrode patterns 40 adjacent to each other. Bridges 20 connecting the first and second electrode patterns 50 arranged side by side in a direction crossing the first electrode patterns 40 (eg, the Y-axis direction).

The routing wire forming unit B includes a plurality of first routing wires 61 electrically connected to first outermost electrode patterns 40 of the plurality of first electrode patterns 40, respectively, The second electrode patterns 50 include a plurality of second routing lines 63 electrically connected to the outermost second electrode patterns 50, respectively.

The pad part C may include a plurality of first pads 71 and a plurality of second routing wires respectively connected to the plurality of first electrode patterns 40 through the plurality of first routing wires 61. The plurality of second pads 73 may be connected to the plurality of second electrode patterns 50 through the plurality of second pads 73.

The touch screen panel is also formed on the substrate 10 on which the bridge 20 and the first and second routing wires 61, 63 are formed to form the first electrode patterns 40 and the second electrode patterns 50. The second contact holes 35 electrically insulating the first and second contact holes 33 and 63 exposing both ends of the bridge 20 and the first and second routing lines 61 and 63. It includes an insulating layer 30 having a.

In order to use the touch screen panel formed as described above integrated with the display panel, a module process of attaching a polarizing plate, a printed circuit board, a backlight, and the like to the display panel is required. In the first step of the module process, a polishing belt is used to remove contaminants on the display panel. In this process, scratches are generated on the electrode pattern positioned on the top of the touch screen panel.

FIG. 3A is a schematic diagram illustrating a module cleaning process of a display device having a touch screen mounted thereon, and FIG. 3B is a SEM (Scanning Electron Microsope) photograph of a portion R of the touch screen panel illustrated in FIG. 3A after a module cleaning process. .

Referring to FIG. 3A, the display panel DP on which the touch screen panel TSP is mounted proceeds in the direction a of the arrow by the feed roller T for the module cleaning process. An abrasive belt AB is disposed on an upper surface of the touch screen panel TSP and a lower surface of the display panel DP, and rotates in the direction of arrow b. Therefore, foreign matter on the surface is removed while the upper surface of the touch screen panel TSP and the lower surface of the display panel DP are rubbed with the polishing belt AB by the rotation of the polishing belt AB.

However, as shown in FIG. 3A, the second electrode pattern 50 of the touch screen panel TSP is stepped up by the thickness of the bridge 20 by the bridge 20 formed on the substrate, so that the second electrode pattern 50 of the touch screen panel TSP is raised. A portion (hereinafter referred to as R portion) is provided. Since the R portion protrudes upwardly from the other portions, the second electrode pattern is moved when the polishing belt AB rotates in the b direction while the display panel DP on which the touch screen panel TSP is mounted moves in the a direction for the cleaning process. A stretch occurs in the R portion of 50 by the polishing belt AB.

3B is a photograph taken of the R portion of the second electrode pattern 50 using the SEM, and shows a state in which the second electrode pattern 50 is opened due to a scratch occurring in the R portion.

As such, when the scratch occurs in the R portion of the second electrode pattern 50 and the second electrode pattern 50 is opened, there is a problem in that the touch position cannot be recognized even if a touch is made on the upper surface of the touch screen panel.

Accordingly, an object of the present invention is to solve the above-described problem, and to provide a touch screen panel in which the second electrode pattern is not opened by a scratch formed in the stepped portion of the second electrode pattern.

In order to achieve the above object, the touch screen panel according to an embodiment of the present invention is a substrate; An electrode forming unit including a plurality of first electrode rows arranged side by side in a first direction on the substrate and a plurality of second electrode rows arranged to intersect the first electrode rows; A plurality of first routing wires formed on the substrate at an outer portion of the electrode forming unit, respectively connected to the plurality of first electrode rows, and connected to the plurality of second electrode rows, respectively; A routing line forming unit including two routing lines; A plurality of first connection patterns formed in the electrode forming part on the same layer as the plurality of first and second routing lines and separated from each other; A plurality of first insulating patterns formed on a substrate on which the first connection pattern is formed to expose both ends of the first connection pattern, and electrically insulating the first electrode row and the second electrode row; And a buffer pattern spaced apart from each of the first insulating patterns along the second electrode string by a predetermined distance and positioned on at least one side of the first insulating pattern, wherein each of the plurality of first electrode strings is provided in plural. A first pair of electrode patterns, wherein adjacent pairs of the first electrode patterns are connected to each other by the first connection pattern, and each of the plurality of second electrode rows is adjacent to each other And a plurality of second connection patterns connecting the second electrode patterns.

In the above configuration, the second connection pattern is formed to overlap the first insulating pattern, and the buffer pattern is formed to overlap with a portion of the second electrode pattern in the region of the second electrode pattern.

In addition, the thickness of the buffer pattern is formed to be equal to or greater than the sum of the thickness of the first connection pattern and the thickness of the first insulating pattern, at least one buffer pattern formed on one side of the first insulating pattern. Is formed.

The apparatus may further include a second insulating pattern formed on the plurality of first and second routing lines to expose a portion of the plurality of first and second routing lines in the routing line forming unit. The column is connected to the first routing line exposed through the second insulating pattern, and the second electrode row is connected to the second routing line exposed through the second insulating pattern.

In addition, the first and second insulating patterns and the buffer pattern may be formed of any one of an inorganic material and an organic material. The inorganic material may include any one of silicon nitride and silicon oxide, and the inorganic material may include photo acryl.

In addition, the first connection pattern, the first routing wire and the second routing wire are formed of a metal material such as Al, AlNd, Mo, MoTi, Cu, CuOx, Cr, or Al, AlNd, Mo, MoTi, Cu , A first layer formed of a metal material such as CuOx, Cr, and a second layer formed on the first layer and formed of a transparent conductive material such as ITO or IZO.

According to the capacitive touch screen panel of the present invention, since the impact applied to the electrode pattern by the polishing belt in the module cleaning process can be alleviated, scratches of the electrode pattern generated by the polishing belt can be reduced, and the scratches Even if it occurs, it is possible to obtain a touch screen panel that does not degrade the performance of the touch screen panel.

1 is a plan view of a capacitive touch screen panel according to the related art,
FIG. 2A is a cross-sectional view taken along line II ′ of the touch screen panel shown in FIG. 1;
FIG. 2B is a cross-sectional view taken along the line II-II 'of the touch screen panel shown in FIG. 1;
3A is a schematic diagram schematically illustrating a module cleaning process of a display device having a touch screen mounted thereon;
3B is a SEM photograph of the portion R of the touch screen panel shown in FIG. 3A after the module cleaning process.
4 is a plan view of a touch screen panel according to an embodiment of the present invention;
5A is a cross-sectional view taken along the line II ′ of the touch screen panel shown in FIG. 4;
FIG. 5B is a cross-sectional view taken along the line II-II 'of the touch screen panel shown in FIG. 4;
5C is a cross-sectional view of another embodiment taken along the line II-II ′ of the touch screen panel shown in FIG. 4;
FIG. 6 is a plan view illustrating an S portion of the touch screen panel illustrated in FIG. 4 and illustrates various forms of a buffer pattern.
FIG. 7 is a plan view illustrating an S portion of the touch screen panel illustrated in FIG. 4, wherein a plurality of buffer patterns are arranged in various forms.
8 is a photograph taken with a microscope portion S of the touch screen panel according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals denote like elements throughout the specification.

First, a touch screen panel according to an exemplary embodiment of the present invention will be described with reference to FIGS. 4 and 5A to 5C. 4 is a plan view of a touch screen panel according to an embodiment of the present invention, FIG. 5A is a cross-sectional view taken along line II ′ of the touch screen panel shown in FIG. 4, and FIG. 5B is a view of the touch screen panel shown in FIG. 4. Sectional view taken along line II-II ', FIG. 5C is a cross-sectional view of another embodiment taken along line II-II' of the touch screen panel shown in FIG.

4, 5A, and 5B, the capacitive touch screen panel according to the embodiment of the present invention includes an electrode forming unit A, a routing wiring forming unit B, and a pad unit C.

The electrode forming unit A may have a plurality of first electrode rows 140 arranged side by side in a first direction (eg, X-axis direction) and a second direction (eg, intersecting the first electrode rows 140). , A plurality of second electrode rows 150 arranged side by side in the Y-axis direction).

The electrode forming portion A is also formed at the intersection of the first electrode string 140 and the second electrode string 150 to electrically insulate the first electrode string 140 and the second electrode string 150. A buffer pattern spaced apart from each of the first insulating patterns 130a and the first insulating pattern 130a along the second electrode string 150 at both sides of the first insulating pattern 130a. Field 133.

Each of the plurality of first electrode strings 140 may include a plurality of first electrode patterns 141 formed of a triangle, a quadrangle, a rhombus, a polygon, and the like, and are formed below the first insulating pattern 130a and adjacent to each other. First connection patterns 120 connecting the first electrode patterns 141 are included.

Each of the plurality of second electrode lines 150 and the plurality of second electrode patterns 151 formed of a triangle, a quadrangle, a rhombus, a polygon, and the like similar to the first electrode patterns 141 and the second electrodes adjacent to each other The plurality of second connection patterns 153 connecting the patterns 151 may be included.

Here, each of the first connection patterns 120 is formed on the substrate 100 under the first insulating pattern 130a at the intersection of the first electrode string 140 and the second electrode string 150. The first electrode patterns 141 are formed to connect the neighboring first electrode patterns 141, but the second electrode pattern connection unit 153 is integrally formed with the second electrode patterns 151 and the first insulating pattern on the substrate 100. There is a difference in that they are formed on the 130a.

In the embodiment of the present invention, the first and second electrode patterns 141 and 151 and the second connection pattern 153 are formed of a transparent conductive material such as ITO or IZO, and the first connection pattern 120 is formed of Al, AlNd. , Metal, such as Mo, MoTi, CuOx, Cr, or a transparent conductive material such as ITO or IZO. The first connection pattern 120 may be formed of a multilayer structure. In the case of the multilayer structure, the lower layer is formed of a metal material such as Al, AlNd, Mo, MoTi, CuOx, Cr, and the upper layer is transparent such as ITO or IZO. It is formed of a conductive material. The first insulating pattern 130a and the buffer pattern 133 may be formed of an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide, or an organic insulating material such as photoacryl.

The routing line forming unit B is formed at an outer portion of the electrode forming unit A, and the plurality of first routing lines 161 and the plurality of second routing lines respectively connected to the plurality of first electrode columns 140. A second insulating pattern 130b including a plurality of second routing lines 163 connected to the electrode columns 150, respectively, and formed on the first routing line 161 and the second routing line 163. ).

In addition, the first routing line 161 and the second routing line 163 may be formed in a single layer or a multilayer structure. The first and second routing wires 161 and 163 are formed of metal layers such as Al, AlNd, Mo, MoTi, Cu, CuOx, and Cr in the case of a single layer, and the lower layers are Al, AlNd, and Mo in the case of a multilayer structure. , MoTi, Cu, CuOx, Cr is formed of a metal material, the upper layer is formed of a transparent conductive material, such as ITO, IZO. Like the first insulating pattern 130a and the buffer pattern 133, the second insulating pattern 130b may also be formed using an inorganic insulating material such as silicon nitride (SiNx) or silicon oxide or an organic insulating material such as photoacryl. have.

The pad part C may include a plurality of first pads 171 and a plurality of second routing wires respectively connected to the plurality of first electrode strings 140 through the plurality of first routing wires 161. A plurality of second pads 173 connected to the plurality of second electrode rows 150 through the 163, respectively.

Next, the configuration of the buffer pattern 133 of the present invention will be described in more detail with reference to FIGS. 5B and 5C.

The buffer pattern 133 of the present invention is formed to overlap a portion of the second electrode pattern 151 in the region of the second electrode pattern 151 of the second electrode row 150, and also to form the first insulating pattern 130a. Spaced apart from a predetermined distance) so as to be disposed on both sides of the first insulating pattern 130a. In the embodiment of the present invention, the buffer pattern 133 is formed on both sides of the first insulating pattern 130a as an example, but the present invention is not limited thereto, and the buffer pattern 133 may include the first insulating pattern 130a. It may be formed only on one side of. However, when the buffer pattern 133 is formed only on one side of the first insulating pattern 130a, the restriction that the buffer pattern 133 is formed at the front end of the cleaning process progressing direction is followed during the module cleaning process. Inconvenience may result.

Meanwhile, when the height of the first connection pattern 120 is h1 and the height of the first insulating pattern 130a is h2, the height h3 of the buffer pattern 133 is the height h1 and the first of the first connection pattern 120. 1 It is preferable to form the height equal to or higher than the sum of the height h2 of the insulating pattern (130a). 5B is a cross-sectional view illustrating an example in which the height h3 of the buffer pattern 133 is equal to the sum of the height h1 of the first connection pattern 120 and the height h2 of the first insulating pattern 130a. 5c is a cross-sectional view illustrating an example in which the height h4 of the buffer pattern 133 is greater than the sum of the height h1 of the first connection pattern 120 and the height h2 of the first insulating pattern 130a.

When the buffer pattern 133 is formed on at least one side of the first insulating pattern 130a as described above, the polishing belt contacts the protruding portion R of the second connection pattern 153 of the second electrode string 150 during the module cleaning process. Before the first contact with the second electrode pattern 151 formed on the upper end of the buffer pattern 133, the impact applied to the upward protrusion R of the second connection pattern 153 by the polishing belt can be alleviated. In particular, when the height h4 of the buffer pattern 133 is greater than the sum of the height h1 of the first connection pattern 120 and the height h2 of the first insulating pattern 130a, as shown in FIG. 2 Since the impact on the protrusion R of the connection pattern can be further alleviated, scratches can be significantly reduced.

Meanwhile, even if a scratch occurs in the second electrode pattern 151 on the buffer pattern 133, since the buffer pattern 133 overlaps only a part of the second electrode pattern 151, the neighboring second electrode patterns 151 may be formed. The electrical pathway of the liver is maintained.

The buffer pattern 133 having a function as described above may be formed in various forms, and examples of the buffer pattern 133 having various shapes are illustrated in FIGS. 6 and 7.

6 is a plan view illustrating an S portion of the touch screen panel illustrated in FIG. 4, which is a plan view illustrating various forms of the buffer pattern 133, and FIG. 7 illustrates an S portion of the touch screen panel illustrated in FIG. 4. The plan view shown in FIG. 1 is a plan view showing an example in which a plurality of buffer patterns 133 are formed and their shapes are arranged in various forms.

The buffer patterns 133 shown in (a), (b), (d), (e), (g), and (h) of FIG. 6 are formed on the sidewalls closer to the first insulating pattern 130a in plan view. The width is shorter than the width of the far side wall, and FIGS. 7C, 7F, and 7I show the width of the side wall closer to the first insulating pattern 130a and the far side wall. It is a figure which shows the example of the case where the width is substantially similar. In any case, since the polishing belt is capable of buffering the impact on the second connection pattern 153 formed on the first insulating pattern 130a, it is possible to prevent the deterioration of the touch performance caused by the scratch caused by the polishing belt. Can be.

Although the buffer pattern 133 illustrated in FIG. 7 is formed smaller than the buffer patterns illustrated in FIG. 6, a plurality of buffer patterns 133 are formed in the region of the second electrode pattern 151, so that both sides of the first insulating pattern 130a are formed. Since it is formed in, the same function as the buffer pattern shown in FIG. 6 can be performed.

FIG. 8 is a microscopic photograph of the S portion of the touch screen panel shown in FIG. 4 after the module cleaning process. FIG. 8 shows the second electrode pattern on the buffer pattern rather than the scratch generated on the second connection pattern on the first insulation pattern. Notice that more scratches have occurred.

As described above, according to the touch screen panel according to the embodiment of the present invention, since the impact applied to the electrode pattern by the polishing belt in the module cleaning process can be alleviated, scratches on the electrode pattern generated by the polishing belt can be reduced. In addition, there is an effect that it is possible to obtain a touch screen panel that does not lower the performance of the touch screen panel even if a scratch occurs.

The touch screen panel according to an embodiment of the present invention is a liquid crystal display (LCD), a field emission display (FED), a plasma display panel (PDP), an electroluminescent display ( It can be applied to a display device including an electroluminescence device (EL), an electrophoretic display device. In this case, the substrate of the touch screen panel according to the embodiments of the present invention can be used as the substrate of these display devices.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

100: substrate 120: first connection pattern
130: insulating layer 130a: first insulating pattern
130b: second insulating pattern 133: buffer pattern
140: first electrode string 141: first electrode pattern
150: second electrode string 151: second electrode pattern
153: second connection pattern 161: first routing wiring
163: second routing wiring A: electrode forming portion
B: Routing wiring forming part C: Pad part

Claims (9)

Board;
An electrode forming unit including a plurality of first electrode rows arranged side by side in a first direction on the substrate and a plurality of second electrode rows arranged to intersect the first electrode rows;
A plurality of first routing wires formed on the substrate at an outer portion of the electrode forming unit, respectively connected to the plurality of first electrode rows, and connected to the plurality of second electrode rows, respectively; A routing line forming unit including two routing lines;
A plurality of first connection patterns formed in the electrode forming part on the same layer as the plurality of first and second routing lines and separated from each other;
A plurality of first insulating patterns formed on a substrate on which the first connection pattern is formed to expose both ends of the first connection pattern, and electrically insulating the first electrode row and the second electrode row; And
A buffer pattern spaced apart from each of the first insulating patterns along the second electrode string by a predetermined distance and positioned on at least one side of the first insulating pattern,
Each of the plurality of first electrode strings includes a plurality of first electrode patterns, and adjacent pairs of the first electrode patterns are connected to each other by the first connection pattern,
Each of the plurality of second electrode strings includes a plurality of second electrode patterns and a plurality of second connection patterns connecting adjacent second electrode patterns.
The method of claim 1,
The second connection pattern is formed to overlap the first insulating pattern
And the buffer pattern is formed to overlap a portion of the second electrode pattern in an area of the second electrode pattern.
The method of claim 2,
The thickness of the buffer pattern is a touch screen panel, characterized in that equal to or greater than the sum of the thickness of the first connection pattern and the thickness of the first insulating pattern.
The method of claim 2,
And at least one buffer pattern formed on one side of the first insulating pattern.
The method of claim 1,
And a second insulating pattern formed on the plurality of first and second routing lines to expose a portion of the plurality of first and second routing lines in the routing line forming unit.
The first electrode string is connected to the first routing wire exposed through the second insulating pattern, and the second electrode row is connected to the second routing wire exposed through the second insulating pattern. Screen panel.
The method of claim 5, wherein
And the first and second insulating patterns and the buffer pattern are formed of any one of an inorganic material and an organic material.
The method according to claim 6,
The inorganic material includes any one of silicon nitride and silicon oxide, and the inorganic material includes photo acryl.
The method according to any one of claims 1 to 7,
And the first connection pattern and the first and second routing lines include any one of Al, AlNd, Mo, MoTi, Cu, CuOx, and Cr.
The method according to any one of claims 1 to 7,
The first connection pattern, the first and second routing wires are formed of a first layer including any one of Al, AlNd, Mo, MoTi, Cu, CuOx, and Cr, and formed on the first layer and formed of ITO and IZO. A touch screen panel, characterized in that formed in a multi-layer structure including a second layer including any one of.

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