TWI400520B - Capacitive touch screen layout and its manufacturing method - Google Patents

Description

Capacitive touch screen wiring structure and manufacturing method thereof

The invention relates to a touch screen wiring and a manufacturing method thereof, in particular to a capacitive touch screen wiring and a manufacturing method thereof.

The wiring of the touch screen includes two sets of wires that intersect vertically and horizontally in the X direction and the Y direction. The previous touch screen wiring structure has the following defects: 1. The two sets of wires in the X direction and the Y direction intersect in space, and in the manufacturing process, the first need A set of conductive films on the bottom layer is fabricated, and then an insulating film is formed, and then a conductive film of a set of wires is formed. Since the transparent conductive films of the two sets of wires must be separately fabricated, the color difference between the two conductive films is caused, and the quality of the touch screen is lowered. 2. Since the conductive film material of the wire is made of a transparent material, the film layer is thin, and the wires are in two groups. The bridging film layer located at the intersection of the intersection is prone to disconnection, resulting in partial disconnection of the wire; 3. The wire resistance of the conductive film of the wire is high, which reduces the performance of the touch screen.

One of the technical problems to be solved by the present invention is to provide a capacitive touch screen wiring, which overcomes the defects of the color difference of the previous capacitive touch screen wiring, the partial disconnection of the wire, and the high line resistance of the conductive film of the wire.

The second technical problem to be solved by the present invention is to provide a method for manufacturing a capacitive touch screen wiring, which overcomes the defects of the prior art, such as chromatic aberration, partial disconnection of the wire, and high line resistance of the conductive film of the wire.

The technical solution adopted by the present invention to solve one of the technical problems is to construct a capacitive touch screen wiring, comprising a transparent conductive film of a first set of wires arranged in a X, Y direction on a glass substrate, and a first a transparent conductive film of a set of wires and an insulating film, further comprising a metal bridge film layer, the transparent conductive film of the first set of wires is continuously disposed, and the transparent conductive film of the second set of wires is a transparent conductive film of the first set of wires The insulating film covers the transparent conductive film of the first set of wires at the intersection of the transparent conductive film of the first set of wires and the transparent conductive film of the second set of wires, and the edge of the insulating film is located in the first group. On the surface of the glass substrate adjacent to the transparent conductive film of the wire, the metal bridge film layer is connected to the transparent conductive film of the second group of wires disposed on both sides of the transparent conductive film of the first group of wires across the insulating film to make it continuous And a metal bridge film layer covers the surface of the glass substrate between the transparent conductive film and the insulating film of the second set of wires to be connected.

Wherein, the metal bridge film layer is one or more metal layers or metal alloy layers.

The shape of the insulating film is one of a rectangular shape, a square shape, or an elliptical shape.

Wherein, the width of the metal bridge film layer is smaller than the width of the transparent conductive film of the second group of wires.

The technical solution adopted by the present invention to solve the second problem is to provide a method for manufacturing a capacitive touch screen wiring, comprising the steps of: S1, simultaneously or separately forming a transparent conductive of a first set of wires on a glass substrate. a transparent conductive film of the film and the second set of wires, the transparent conductive film of the first set of wires is continuously disposed, and the transparent conductive film of the second set of wires is segmented by the transparent conductive film of the first set of wires; S2; An insulating film covering the transparent conductive film of the first set of wires at the intersection of the transparent conductive film of the first two sets of wires and the transparent conductive film of the second set of wires, the edge of the insulating film being located on the transparent conductive film of the first set of wires On the glass substrate in the vicinity; S3, a metal bridge film is formed, and the metal bridge film connects the transparent conductive film of the second group of wires spaced apart on both sides of the transparent conductive film of the first group of wires across the insulating film to make it a continuous structure And The metal bridge film simultaneously covers the surface of the glass substrate between the transparent conductive film of the second set of wires to be connected and the insulating film.

Wherein, in step S2, the shape of the insulating film is one of a rectangle or a square or an ellipse.

Wherein, in step S3, the metal bridge film is one or more layers of metal or metal alloy.

The capacitive touch screen wiring and the manufacturing method thereof embodying the present invention have at least the following advantages compared with the prior art: 1. The transparent conductive film layers of the two sets of wires can be fabricated at the same time, thereby avoiding the color difference caused by the separate fabrication and improving the product quality of the touch screen; The metal bridge film layer is thicker, and it is not easy to break the wire, which improves the continuity of the second group of wires; The line resistance of the metal bridge film layer is much smaller than the line resistance of the transparent wire film layer, which reduces the line resistance of the second group of wires and improves the performance of the touch screen; The insulating film is adjacent to one side edge of the second group of conductive transparent film and does not contact the second group of conductive transparent film, and the edge of the insulating film does not rise, so the metal bridge film layer is not broken at the edge of the insulating film, thereby improving The yield of the product.

1‧‧‧Substrate

2‧‧‧Transparent conductive film of the second set of wires

3‧‧‧Insulation film

4‧‧‧Transparent conductive film of the first set of wires

5‧‧‧Metal bridge layer

6‧‧‧Transparent conductive film of the second set of wires

S1, S2, S3‧‧‧ steps

1 is a plan view showing the structure of a node of an embodiment of a capacitive touch screen wiring of the present invention.

Figure 2 is a cross-sectional view taken along line A-A of Figure 1.

Fig. 3 is a flow chart showing an embodiment of a method of manufacturing a capacitive touch screen wiring of the present invention.

Please refer to FIG. 1 and FIG. 2, which are structural views of a node of an embodiment of a capacitive touch screen wiring of the present invention, and a cross-sectional view thereof taken along line A-A. In the figure, the capacitive touch screen wiring of the present invention comprises a transparent conductive film 4 of a first set of wires arranged on two sides of the glass substrate 1 in the X and Y directions, and a transparent conductive film 2, 6 of the second set of wires. And insulating film 3. Transparent guide of the first set of wires The electric film 4 is continuously disposed, and the transparent conductive films 2, 6 of the second set of wires are segmented by the transparent conductive film 4 of the first set of wires, and the insulating film 3 covers the transparency of the first set of wires at the intersection of the two sets of wires. The conductive film 4 is provided, and the edge of the insulating film 3 is located on the surface of the glass substrate 1 adjacent to the transparent conductive film 4 of the first group of wires. The metal bridge film layer 5 is connected across the insulating film 3 to the transparent conductive films 2, 6 of the second group of wires disposed on both sides of the transparent conductive film 4 of the first group of wires, so that the transparent conductive film 2 of the second group of wires 6 becomes a continuous structure while the metal bridge film layer 5 covers the surface of the glass substrate 1 between the transparent conductive films 2, 6 of the second set of wires to be connected and the insulating film 3. Thus, the two sets of mutually insulated and complete wires are completed. Since the insulating film 3 does not contact the transparent conductive films 2, 6 of the second set of wires, the edges of the insulating film 3 are not lifted, so the metal bridge film layer 5 is insulated. There is no break at the edge of the film 3. The ends of the metal bridge film layer 5 are completely connected to the transparent conductive films 2, 6 of the second group of wires, thereby creating a connection quality for improving and making the metal bridge film layer 5 and the second group of wires transparent to the conductive films 2, 6. condition.

The metal bridge film layer 5 may be a metal layer or a metal alloy layer of one layer, two layers, three layers or a plurality of layers. The film thickness is much larger than the thickness of the transparent conductive film layer 4 of the first set of wires or the transparent conductive film layers 2, 6 of the second set of wires. Therefore, the metal bridge layer 5 is used for the jumper, and the wire breakage is not easy to occur. And the line resistance of the metal film layer 5 is much smaller than the line resistance of the transparent conductive film layer 4 of the first group of wires or the transparent conductive film layers 2, 6 of the second group of wires, so the bridge jumper structure of the present invention is reduced by the second The wire resistance of the group wires improves the performance of the touch screen.

Referring to FIG. 2, in the embodiment, the shape of the insulating film 3 is a rectangle. In other embodiments, the insulating film 3 may include, but not limited to, a square or an ellipse.

The metal bridge film layer 5 has a smaller line resistance and a higher electrical conductivity than the transparent conductive film layer 4 of the first group of wires or the transparent conductive film layers 2 and 6 of the second group of wires, and the width thereof is generally smaller than that of the second group of wires. 2, the width of 6.

Please refer to FIG. 3 , which is an embodiment of a method for manufacturing a capacitive touch screen wiring according to the present invention. The flow chart is as follows: in step S1, the first group and the second group of conductive transparent conductive films are simultaneously or separately formed on the glass substrate, the transparent conductive films of the first set of wires are continuously disposed, and the second set of wires are transparent. The conductive film is segmented at intervals of the transparent conductive film of the first set of wires. At the same time, the first group and the second group of conductive transparent conductive films are formed, and the chromatic aberration can be avoided, and the first group and the second group of conductive transparent films are respectively formed. Although color difference may occur, the invention does not affect the object of the invention.

In step S2, an insulating film is formed which covers the transparent conductive film of the first group of wires at the intersection of the transparent conductive films of the two sets of wires, and the edge of the insulating film is located on the substrate adjacent to the transparent conductive film. Thus, the edge of the insulating film is not lifted, and the metal bridge film across it is not broken, thereby improving the yield of the product.

In step S3, a metal bridge film is formed, and the metal bridge film is connected across the insulating film to the second group of conductive transparent films disposed on both sides of the transparent conductive film of the first group of wires to form a continuous first structure, metal The bridging film simultaneously covers the surface of the glass substrate between the second set of conductive transparent films to be connected and the insulating film.

In the above step S2, the shape of the insulating film is made in a rectangular shape, a square shape or an elliptical shape.

In the above step S3, the metal bridge film is one layer, two layers, three layers or a plurality of layers of metal or metal alloy.

1‧‧‧ glass substrate

2‧‧‧Second group of wires for transparent conductive film

3‧‧‧Insulation film

4‧‧‧The first set of wires of transparent conductive film

5‧‧‧Metal bridge layer

6‧‧‧Transparent conductive film of the second set of wires

Claims (8)

A capacitive touch screen wiring comprises: a transparent conductive film of a first set of wires, which is continuously disposed on a glass substrate in the X direction; and a transparent conductive film of a second set of wires, the first group in the Y direction a transparent conductive film of the wire is disposed at intervals in the glass substrate; an insulating film covering the first group of the transparent conductive film of the first set of wires and the transparent conductive film of the second set of wires a transparent conductive film on the wire, and an edge of the insulating film is located on a surface of the glass substrate adjacent to the first group of transparent conductive films, and spaced apart from the transparent conductive film of the second set of wires by a predetermined distance; and a metal a bridge film layer is connected across the insulating film to the transparent conductive film of the second group of wires disposed on both sides of the transparent conductive film of the first group of wires, so that the second group of the wire transparent conductive film becomes continuous And a metal bridge film layer covering the surface of the glass substrate between the second set of conductive transparent films and the insulating film. The capacitive touch screen wiring according to claim 1, wherein the metal bridge film layer is one or more metal layers or metal alloy layers. The capacitive touch screen wiring according to claim 1 or 2, wherein the insulating film has a shape of one of a rectangular shape, a square shape, or an elliptical shape. The capacitive touch screen wiring of claim 1 or 2, wherein the width of the metal bridge film layer is smaller than the width of the transparent conductive film of the second group of wires. The capacitive touch screen wiring of claim 3, wherein the width of the metal bridge film layer is smaller than the width of the transparent conductive film of the second group of wires. A manufacturing method of a capacitive touch screen wiring comprises the steps of: S1, simultaneously or separately forming a transparent conductive film of a first set of wires on a glass substrate and a second a transparent conductive film of the set of wires, wherein the transparent conductive film of the first set of wires is continuously disposed, and the transparent conductive film of the second set of wires is segmented by the transparent conductive film of the first set of wires; An insulating film covering the transparent conductive film of the first set of wires at a intersection of the transparent conductive film of the first set of wires and the transparent conductive film of the second set of wires, and the edge of the insulating film is located in the first group The transparent conductive film is adjacent to the glass substrate and spaced apart from the transparent conductive film of the second set of wires by a predetermined distance; S3, a metal bridge film is formed, and the metal bridge film is connected across the insulating film at the first The second set of conductive transparent films are disposed on both sides of the transparent conductive film of the set of wires, so that the transparent conductive film of the second set of wires becomes a continuous structure, and the metal bridge film simultaneously covers the second connected A surface of the glass substrate between the transparent conductive film of the set of wires and the insulating film. The method for manufacturing a capacitive touch screen wiring according to claim 6, wherein in the step S2, the shape of the insulating film is one of a rectangular shape or a square shape or an elliptical shape. The method for manufacturing a capacitive touch screen wiring according to claim 6, wherein in the step S3, the metal bridge film is one or more layers of metal or metal alloy.