TWI511256B - Electrode structure for touch panel and method for manufacturing the same - Google Patents

Description

Electrode structure for touch panel and manufacturing method thereof

The present invention relates to an electrode structure for a touch panel and a method of manufacturing the same.

The electrode structure for a touch panel includes a transparent electrode pattern formed in a field of view of the touch panel, and a wiring pattern formed on an outer side of the transparent electrode pattern. Generally, a wiring pattern is generally formed on a design layer (or a printing layer) formed on one side of a window substrate.

The wiring pattern has a function of connecting the transparent electrode pattern to the external circuit substrate, and is generally connected to a plurality of portions of the side surface of the transparent electrode pattern. For example, when the mobile phone or the like has a quadrangle-shaped field of view, the wiring pattern may be configured to be connected to the transparent electrode pattern on the upper side and the left and right sides of the field of view.

At this time, the wiring pattern and the transparent electrode pattern are connected to each other in a state of being connected to each other or stacked in the up and down direction on the same plane. A contact failure may occur in a portion where the separately formed wiring pattern and the transparent electrode pattern are connected to each other, whereby a problem of a decrease in yield and a defective product may occur. In particular, since the adhesion is insufficient, in the case where the device having the touch panel is dropped, the problem that the transparent electrode pattern and the wiring pattern are electrically disconnected may occur.

An object of the present invention is to provide an electrode structure for a touch panel and a method of manufacturing the same, which has a structure for improving the adhesion of a transparent electrode pattern and a wiring pattern to improve stability of electrical characteristics.

An electrode structure for a touch panel according to an embodiment of the present invention includes: a transparent electrode pattern; a wiring pattern arranged in a state overlapping a portion of the outer side of the transparent electrode pattern in an up-and-down direction; and an insulating adhesive layer interposed therebetween The transparent electrode pattern and the wiring pattern are selectively electrically insulated between the transparent electrode pattern and the wiring pattern. Above insulation The bonding layer is formed such that the contact portions electrically connected to each other in the transparent electrode pattern and the wiring pattern are exposed and in contact with each other.

The insulating adhesive layer may be formed such that all of the regions including the transparent electrode pattern and the contact portion that are electrically connected to each other in the wiring pattern are exposed.

The transparent electrode pattern and the wiring pattern may respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; and the plurality of transparent electrode pattern lines and the plurality of wiring pattern lines are vertically oriented The contact portions that are overlapped and electrically connected to each other may be aligned in a line shape, and the insulating adhesive layer may include a step portion formed in a stepped shape to expose a region including the contact portion of the electrical connection.

The transparent electrode pattern and the wiring pattern may respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; and the plurality of transparent electrode pattern lines and the plurality of wiring pattern lines are vertically oriented The contact portions that are overlapped and electrically connected to each other may be aligned in a line shape, and the insulating adhesive layer may be formed by dividing a plurality of portions exposing a region including the contact portion of the electrical connection.

The transparent electrode pattern and the wiring pattern may respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; the insulating adhesive layer may be formed only to exist in the transparent electrode patterns crossing from each other The line and the innermost portion of the wiring pattern line are before the portion including the transparent electrode pattern line and the portion of the wiring pattern line which are overlapped in the vertical direction and electrically connected to each other.

An electrode structure manufacturing method for a touch panel according to an embodiment of the present invention includes the steps of: forming a transparent electrode pattern; forming an insulating adhesive layer on the transparent electrode pattern to expose a portion of the transparent electrode pattern; and being transparent A wiring pattern that overlaps in the vertical direction is formed on the exposed portion of the electrode pattern and the insulating adhesive layer. The insulating adhesive layer is formed between the transparent electrode pattern and the wiring pattern to selectively electrically insulate the transparent electrode pattern and the wiring pattern; and the insulating adhesive layer is in the transparent electrode pattern and the wiring pattern The contact portions which are overlapped in the direction and are electrically connected to each other are formed by being exposed and in contact with each other.

The insulating adhesive layer may be formed to include all of the transparent electrode patterns and the regions of the wiring patterns in which the contact portions electrically connected to each other in the vertical direction are exposed.

The transparent electrode pattern and the wiring pattern described above may respectively include substantially right angles a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction; the plurality of transparent electrode pattern lines and the plurality of wiring pattern lines overlapping in the vertical direction and electrically connected to each other may be aligned in a line shape; The insulating adhesive layer may include a step portion formed in a stepped shape to expose a region including the contact portion of the electrical connection.

The transparent electrode pattern and the wiring pattern may respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; and the plurality of transparent electrode pattern lines and the plurality of wiring pattern lines are vertically oriented The overlapping and interconnecting contact portions may be aligned in a line shape; the insulating adhesive layer may be divided into a plurality of portions exposing a region including the contact portion of the electrical connection.

The transparent electrode pattern and the wiring pattern may respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; the insulating adhesive layer may be formed only to exist in the transparent electrode patterns crossing from each other The line and the innermost portion of the wiring pattern line are to a front portion including a region of the transparent electrode pattern and the wiring pattern line which are overlapped in the up-and-down direction and electrically connected to each other.

According to the invention, the insulating adhesive layer is formed such that a portion of the transparent electrode pattern and the wiring pattern which are overlapped in the up-and-down direction and electrically connected is exposed, so that the corresponding portion of the wiring pattern is directly formed on the corresponding portion of the transparent electrode pattern, thereby improving the adhesion. .

100‧‧‧ touch panel

110‧‧‧Window substrate

120‧‧‧Window substrate

200‧‧‧electrode structure

210‧‧‧Transparent electrode pattern

211‧‧‧Transparent electrode pattern line

220‧‧‧ wiring pattern

221‧‧‧ wiring pattern line

230‧‧‧Insulating adhesive layer

231‧‧‧Steps

230‧‧‧Insulating adhesive layer

231‧‧‧Steps

240‧‧‧Adhesive layer

C‧‧‧Contacts

VA‧‧ Vision area

1 is a view schematically showing a touch panel of an electrode structure for a touch panel according to an embodiment of the present invention; and FIG. 2 is a schematic perspective view of an electrode structure for a touch panel according to an embodiment of the present invention; 3 is a schematic exploded perspective view of an electrode structure for a touch panel according to an embodiment of the present invention; FIG. 4 is a cross-sectional view taken along line VI-VI of FIG. 2; and FIG. 5 is an embodiment according to the present invention. A schematic perspective view of an electrode structure for a touch panel; FIG. 6 is a schematic exploded perspective view of an electrode structure for a touch panel according to another embodiment of the present invention; and FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. Open section view.

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

First, a touch panel 100 to which the electrode structure 200 for a touch panel according to an embodiment of the present invention can be applied will be described with reference to FIG.

The touch panel 100 includes a window substrate 110, which can be an electrostatic capacitance touch panel or a resistive film touch panel, and can be applied to various information communication devices such as a mobile phone and a portable PC.

The window substrate 110 may have a substantially quadrangular shape or a film shape, and may be formed of light transmissive glass, acrylic, PMMA, or the like. In the first drawing, the rest of the information communication device other than the touch panel is omitted for convenience of illustration.

The window substrate 110 includes a field of view area VA, and the field of view area VA may be formed at a central portion of the window substrate 110, and is a region that reflects a touch function and corresponds to a display area of the information communication device.

A design layer 120 may be formed on one side of the window substrate 110. The design layer 120 may be formed on the outer side of the field of view area VA, and the design layer 120 may be formed to surround the field of view area VA along the edge of the window substrate 110. At this time, the design layer 120 may be formed on the rear surface in both faces of the window substrate 110. For example, the design layer 120 can be formed by printing a black substance.

On the other hand, the electrode structure 200 according to the embodiment of the present invention is for embodying the electrode structure of the touch sensor, and the electrode structure 200 includes the transparent electrode pattern 210 and the wiring pattern 220. The transparent electrode pattern 210 is formed on the field of view VA of the window substrate 110, and the wiring pattern 220 is formed on the outer side of the field of view VA.

The transparent electrode pattern 210 is a portion for embodying a touch function, and the wiring pattern 220 is for electrically connecting an external circuit substrate (not shown) and a portion of the transparent electrode pattern.

Referring to FIGS. 2 to 4, the transparent electrode pattern 210 is first formed in the field of view VA of the touch panel. The transparent electrode pattern 210 may be formed by patterning or printing a transparent conductor on one surface of the window substrate 110. For example, the transparent conductor may be a conductive transparent material such as ITO, SNW (silver nano wire), CNT (carbon nano tube), graphite monoatomic layer, or metal mesh. .

Accordingly, a transparent electrode pattern as exemplarily shown in FIGS. 2 to 4 is formed. 210. At this time, the transparent electrode pattern 210 is formed to extend to the outer side of the field of view area A to include a portion overlapping the wiring pattern 220 formed later in the up and down direction.

Then, an insulating adhesive layer 230 is formed on the transparent electrode pattern 210 to expose one portion of the transparent electrode pattern 210. Further, a wiring pattern 220 is formed thereon.

The insulating adhesive layer 230 may be formed of a material having electrical insulation and adhesion, and the wiring pattern 220 may be formed by printing a metal such as silver having good conductivity.

The insulating adhesive layer 230 may be formed in a portion to be insulated from each other in a region including a portion where the transparent electrode pattern 210 and the wiring pattern 220 overlap in the up and down direction. That is, the insulating adhesive layer 230 is interposed between the transparent electrode pattern 210 and the wiring pattern 220 to selectively electrically insulate the transparent electrode pattern 210 and the wiring pattern 220.

At this time, the insulating adhesive layer 230 may be formed to have a pattern in which all of the regions S including the transparent electrode patterns 210 and the contact portions C which are electrically connected to each other in the vertical direction and overlapped in the wiring pattern 220 are exposed. That is, according to the embodiment of the present invention, the insulating adhesive layer 230 is not formed on the entire region S including the contact portion C in which the transparent electrode pattern 210 and the wiring pattern line 220 are overlapped and electrically connected in the up-and-down direction, and has a direct pattern on the transparent electrode pattern 210. Since the structure of the wiring pattern 220 is formed, the adhesion is improved.

On the other hand, referring to FIGS. 2 and 3, the transparent electrode pattern 210 may include a plurality of transparent electrode pattern lines 211, and the plurality of transparent electrode pattern lines 211 may be elongated in the direction juxtaposed to each other. Also, the wiring pattern 220 may include a plurality of wiring pattern lines 221, and the plurality of wiring pattern lines 221 may be elongated in a direction juxtaposed to each other. At this time, the plurality of transparent electrode pattern lines 211 and the plurality of wiring pattern lines 221 may be elongated in directions substantially at right angles to each other.

At this time, as shown in FIG. 2, the plurality of transparent electrode pattern lines 211 and the plurality of wiring pattern lines 221 are overlapped in the up-and-down direction and the contact portions C electrically connected to each other are aligned in a line shape, and the insulating adhesive layer 230 may be in the form of a step. The step portion 231 that exposes the region S including the contact portion C of the electrical connection is formed.

In other words, the insulating adhesive layer 230 may be formed to exist only in the up-and-down direction from the innermost portion of the transparent electrode pattern 211 and the wiring pattern line 221 which intersect in the up-and-down direction to the transparent electrode pattern line 211 and the wiring pattern line 221 The previous portion of the region S of the contact portion C that is electrically connected.

The insulating adhesive layer 230 is formed in such a manner that the transparent electrode pattern 210 and The portion of the wiring pattern 220 that is overlapped and electrically connected in the up-and-down direction, the transparent electrode pattern 210 is completely exposed, and the wiring pattern 220 is directly formed on the upper surface thereof, whereby the adhesion can be improved.

On the other hand, an electrode structure according to another embodiment of the present invention will be described with reference to Figs. 5 to 7.

In the present embodiment, the transparent electrode pattern lines 211 and the wiring pattern lines 221 can be formed in a manner and form similar to those described in FIGS. 2 and 3.

At this time, referring to FIGS. 5 to 7 , the plurality of transparent electrode pattern lines 211 and the plurality of wiring pattern lines 221 are overlapped in the up-and-down direction and the contact portions C electrically connected to each other are aligned in a line shape, and the insulating adhesive layer 240 can be divided into A region including the contact portion C electrically connected is formed by exposing a plurality of portions. That is, in the present embodiment, the insulating paste layer 240 is not formed in a portion between the transparent electrode pattern lines 211 in FIGS. 2 to 4 .

The preferred embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and various modifications and improvements of the basic concept of the present invention will be apparent to those skilled in the art in the following claims. The scope of the patent application of the present invention.

200‧‧‧electrode structure

210‧‧‧Transparent electrode pattern

211‧‧‧Transparent electrode pattern line

220‧‧‧ wiring pattern

221‧‧‧ wiring pattern line

230‧‧‧Insulating adhesive layer

C‧‧‧Contacts

VA‧‧ Vision area

Claims (6)

An electrode structure for a touch panel, comprising: a transparent electrode pattern; a wiring pattern arranged in a state overlapping a portion of the outer surface of the transparent electrode pattern in a vertical direction; and an insulating adhesive layer interposed between the transparent electrode Selectively electrically insulating the transparent electrode pattern and the wiring pattern between the pattern and the wiring pattern; the insulating adhesive layer is formed such that a portion of the transparent electrode pattern and the wiring pattern electrically connected to each other is exposed and in contact with each other; The layer is formed to include all of the transparent electrode pattern and the contact portion of the wiring pattern which are overlapped and electrically connected to each other; the transparent electrode pattern and the wiring pattern respectively include a plurality of transparent electrode patterns elongated in a direction substantially perpendicular to each other a line and a plurality of wiring pattern lines; wherein the plurality of transparent electrode pattern lines and the plurality of wiring pattern lines are overlapped in the up-and-down direction and electrically connected to each other in a line shape; the insulating adhesive layer is formed in a stepped shape Including the contact portion of the above electrical connection Field exposed by the stepped portion. The electrode structure for a touch panel according to claim 1, wherein the transparent electrode pattern and the wiring pattern respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; The plurality of transparent electrode pattern lines and the contact portions electrically connected to each other in the vertical direction in the plurality of wiring pattern lines are aligned in a line shape; the insulating adhesive layer is divided to expose a region including the contact portion of the electrical connection Formed in part. The electrode structure for a touch panel according to claim 1, wherein the transparent electrode pattern and the wiring pattern respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; The insulating adhesive layer is formed only in a portion in which the transparent electrode pattern lines and the innermost portions of the wiring pattern lines which are in contact with each other, and the portions of the transparent electrode pattern lines and the wiring pattern lines which are vertically overlapped and electrically connected to each other Until the previous part. A method for manufacturing an electrode structure for a touch panel, comprising the steps of: forming a transparent electrode pattern; forming an insulating adhesive layer on the transparent electrode pattern to expose a portion of the transparent electrode pattern; and the transparent electrode pattern The exposed portion and the above-mentioned insulating adhesive layer are formed along the upper and lower sides And an insulating bonding layer formed between the transparent electrode pattern and the wiring pattern to selectively electrically insulate the transparent electrode pattern and the wiring pattern; the insulating bonding layer to include the transparent electrode pattern And a region of the contact portion which is electrically connected to each other in the vertical direction and which is electrically connected to each other is exposed and brought into contact with each other; the insulating adhesive layer is formed to include the transparent electrode pattern and the wiring pattern which overlap each other in the vertical direction The regions of the connected contact portions are all exposed; the transparent electrode patterns and the wiring patterns respectively include a plurality of transparent electrode pattern lines and a plurality of wiring pattern lines extending in a direction substantially perpendicular to each other; the plurality of transparent electrode pattern lines and the above The contact portions that are electrically connected to each other in the plurality of wiring pattern lines are vertically aligned and arranged in a line shape, and the insulating adhesive layer includes a step portion formed in a stepped shape to expose a region including the contact portion of the electrical connection. The method of manufacturing an electrode structure for a touch panel according to claim 4, wherein the transparent electrode pattern and the wiring pattern respectively include a plurality of transparent electrode pattern lines and a plurality of wiring patterns elongated in a direction substantially perpendicular to each other. a line in which the contact portions of the plurality of transparent electrode pattern lines and the plurality of wiring pattern lines which are overlapped in the vertical direction and are connected to each other are arranged in a line shape; the insulating adhesive layer is divided to expose an area including the contact portion of the electrical connection. Formed in multiple parts. The method of manufacturing an electrode structure for a touch panel according to claim 4, wherein the transparent electrode pattern and the wiring pattern respectively include a plurality of transparent electrode pattern lines and a plurality of wiring patterns elongated in a direction substantially perpendicular to each other. The insulating adhesive layer is formed so as to be electrically connected only to each other from the innermost portion of the transparent electrode pattern line and the wiring pattern line that intersect each other to the transparent electrode pattern line and the wiring pattern line in the vertical direction. The previous part of the area of the contact.