TWI420368B - The Method and Structure of Touchpad Electrode - Google Patents

Description

Touch plate electrode layout method and structure thereof

The present invention relates to a touch panel electrode routing method and structure thereof, particularly an electrode having a bridged trench, and achieves the same efficiency of the method and structure by a minimum process structure.

In the process of the touch panel, the two electrodes are formed on the substrate by two different axial directions, and an insulating layer is formed on one of the axial electrodes to provide another axial electrode. The metal wires provided on the insulating layer are electrically connected. However, conventionally, the metal wire disposed on the insulating layer may cause damage to the metal wire due to subsequent processes, so that the metal wire may not be turned on, thereby causing a decrease in the yield of the touch panel.

Therefore, in some technologies, the metal wire can be placed in the bridge groove by the technique of the bridge groove to prevent the metal wire from being damaged. Therefore, it is necessary to provide a new structure for efficiently improving the yield of the touch panel.

The object of the present invention is to provide a method for routing a touch panel electrode, which is an electrode having a bridged trench, which can be used to achieve the same effect with a minimum process.

Another object of the present invention is to provide a touch panel electrode structure that can achieve the same touch effect by reducing the conventional process structure.

To achieve the above and other objects, the present invention provides a touch panel electrode routing method, the method comprising the steps of: providing a substrate; forming a first transparent conductive layer on one side of the substrate, and the first transparent conductive layer has a plurality of patterns The blocks are disposed adjacent to each other; the alignment film layer is formed on one side of the substrate; the conductive layer is formed on one side of the substrate, and the conductive layer has a plurality of electrical wires for connecting at least one of the pattern blocks; And forming a protective layer on the conductive layer to protect the conductive layer.

To achieve the above and other objects, the present invention provides a touch panel electrode structure comprising: a substrate layer, an alignment film layer, a first transparent conductive layer, a conductive layer and a protective layer. Wherein the alignment film layer is disposed on one side of the substrate layer; the first transparent conductive layer is disposed on one side of the alignment film layer, and the first transparent conductive layer has a plurality of pattern blocks disposed adjacent to each other; The conductive layer is disposed adjacent to the other side of the alignment film layer; and the protective layer is disposed on the conductive layer.

Compared with the prior art, the touch panel electrode routing method and the structure thereof of the present invention utilize only a single conductive layer and a protective layer and cooperate with the substrate layer, the first transparent conductive layer and the alignment film layer. In addition, a second transparent conductive layer having no pattern block may be formed on the other side of the substrate layer while forming the first transparent conductive layer for forming protection on the other side of the substrate layer. And forming an outer frame wire layer between the substrate and the protective layer. Therefore, the simplified process of the present invention can still have the functions of the conventional conventional touch panel, in addition to effectively reducing the manufacturing cost, and effectively preventing the electrostatic effect and increasing its capacitance and sensitivity.

In order to fully understand the objects, features and advantages of the present invention, the present invention will be described in detail with reference to the accompanying drawings. A schematic flow chart of a method for laying a touch panel electrode. In the first embodiment, the step of the electrode structure of the touch panel is started in step S1 to provide a substrate; then, in step S2, a first transparent conductive layer is formed on one side of the substrate, and the first transparent conductive layer is formed. The plurality of pattern blocks are disposed adjacent to each other; and then step S3 is performed to form an alignment film layer on one side of the substrate; then, in step S4, a conductive layer is formed on one side of the substrate, and the conductive layer has a plurality of electricity a wire for connecting at least one of the pattern blocks; and, in step S5, forming a protective layer on the conductive layer to protect the conductive layer.

In another embodiment, the electrically conductive wires of the conductive layer are formed by at least one of overexposure or overexposure by an optically compensated reticle. Furthermore, the above-mentioned routing method further includes forming an outer frame wire layer between the substrate and the protective layer; and simultaneously forming a second transparent conductive layer on the other side of the substrate, wherein the second transparent conductive layer is not Having a pattern block for shielding the substrate; and forming a plurality of bridged trenches in the alignment film layer for spanning between the pattern blocks, wherein the respective electrical wires are respectively disposed on the bridges On the groove.

Furthermore, FIG. 2 is a more detailed step of the above step S3, wherein the step of forming the alignment film layer further comprises: starting with step S3-1, applying a photoresist to the substrate; and then following step S3-2 Providing a mask having a pattern or a mask having a halftone dot pattern, and the mask is used to expose the pattern or the halftone dot pattern to the photoresist; and then step S3- 3, developing the pattern or the halftone dot pattern on the photoresist to form the bridged trenches spanning between the pattern blocks; and, following step S3-4, baking The photoresist.

It is noted that the step of forming the reticle having the halftone dot pattern includes: a wire diameter of the opaque region provided on the surface of the reticle is larger than a wire diameter of the halftone dot pattern or forming a plurality of holes ( For example, the holes may be circular, rectangular or of any shape, and are disposed evenly on the surface of the reticle, and the interference and diffraction caused by the light during exposure to the halftone dot pattern, so that the bridge type The photoresist of the trench is lower than the height of the bridge insulating unit after development.

Figure 3 is a detailed step of the above step S4, the step of forming the conductive layer further comprises: starting at step S4-1, sputtering a conductive material on the substrate; and then step S4-2, applying a photoresist to the And then, in step S4-3, providing the optical compensation type reticle, and over-exposing the electric wire pattern corresponding to the isoelectric wire to the photoresist through the optical compensation reticle; and then following step S4 4. Developing the electrical lead pattern to form the pattern blocks having adjacent one another, and the electrical lead pattern is produced by overexposure and overexposure.

Figure 4 is a detailed step of the above step S5, further comprising starting at step S5-1, coating at least one of a photoresist, a sputter photoresist or an organic substance on the substrate; and then baking in step S5-2 The photoresist or the organic substance forms a hard protective film.

Referring to FIG. 5, it is a schematic vertical cross-sectional view of an electrode structure of a touch panel according to an embodiment of the present invention. In this embodiment, the touch panel electrode structure is used for a touch panel, and includes a substrate layer SL, a first transparent conductive layer FECL, an alignment film layer PIL, a conductive layer CL, and a protective layer PL. The alignment film layer PIL is provided on one side of the substrate layer SL. The first transparent conductive layer FECL is disposed on one side of the alignment film layer PIL, and the first transparent conductive layer FECL has a plurality of pattern blocks disposed adjacent to each other. The conductive layer CL is disposed adjacent to the other side of the alignment film layer PIL; and the protective layer PL is disposed on the conductive layer CL.

Furthermore, referring to FIG. 6, the touch panel electrode structure further includes an outer frame wire layer ML between the substrate SL and the protective layer PL; and, further comprising a second transparent conductive layer SECL, which is simultaneously disposed on the The other side of the substrate layer SL, and the second transparent conductive layer SECL does not have a pattern block. The structural schematic diagram of the substrate layer SL, the first transparent conductive layer FECL, the alignment film layer PIL, the conductive layer CL, and the second transparent conductive layer SECL is as shown in FIG. 7 .

However, it is worth noting that Figures 5 and 6 are for illustrative purposes only. In other words, the scope of the simplified structure of the present invention also encompasses embodiments in which the partial layers are rearranged as long as the same effects as conventional touches can be achieved.

Compared with the prior art, the touch panel electrode routing method and the structure thereof of the present invention utilize only a single conductive layer and a protective layer and cooperate with the substrate layer, the first transparent conductive layer and the alignment film layer. In addition, a second transparent conductive layer having no pattern block may be formed on the other side of the substrate layer while forming the first transparent conductive layer for forming protection on the other side of the substrate layer. And forming an outer frame wire layer between the substrate and the protective layer. Therefore, the simplified process using the present invention can still have the functions of the conventional conventional touch panel, in addition to effectively reducing the manufacturing cost, and effectively preventing the electrostatic effect and increasing its capacitance and sensitivity.

The invention has been described above in terms of the preferred embodiments, and it should be understood by those skilled in the art that the present invention is not intended to limit the scope of the invention. It should be noted that variations and permutations equivalent to those of the embodiments are intended to be within the scope of the present invention. Therefore, the scope of the invention is defined by the scope of the following claims.

PL. . . The protective layer

FECL. . . First transparent conductive layer

SECL. . . Second transparent conductive layer

SL. . . Substrate layer

PIL. . . Alignment layer

CL. . . Conductive layer

ML. . . Outer frame conductive layer

1 to 4 are schematic flow diagrams of a method for laying a touch panel electrode;

5 and 6 are vertical cross-sectional views of the electrode structure of the touch panel;

Figure 7 is a top view of the electrode structure of the touch panel.

S1~S5. . . Method step

Claims (9)

A touch panel electrode routing method includes: providing a substrate; forming a first transparent conductive layer on one side of the substrate, and the first transparent conductive layer has a plurality of pattern blocks adjacent to each other, and the patterns are The blocks are not connected to each other; an alignment film layer is formed on one side of the substrate, the alignment film layer is composed of a plurality of bridged trenches, and the bridged trenches are spanned between the pattern blocks, Having the pattern blocks connected to each other by the bridged trenches; forming a conductive layer on one side of the substrate and below the alignment film layer, and the conductive layer has a plurality of electrical wires for connecting At least one of the pattern blocks; a protective layer over the conductive layer for protecting the conductive layer; and an outer frame wire layer formed between the substrate and the protective layer. The arranging method of claim 1, further comprising simultaneously forming a second transparent conductive layer on the other side of the substrate, wherein the second transparent conductive layer does not have a pattern block and is used for shielding the substrate . The arranging method of claim 1, wherein the electric wires are respectively disposed on the bridge grooves. The method of laying out according to claim 1, wherein the conductive layer The electrical leads are formed by at least one of overexposure or overexposure by means of an optically compensated reticle. The method of claim 4, wherein the step of forming the alignment layer further comprises: coating a photoresist on the substrate; providing a mask having a pattern or a mask having a halftone dot pattern, And exposing the pattern or the halftone dot pattern to the photoresist by using the mask; developing the pattern or the halftone dot pattern on the photoresist to form a region across the pattern The bridged trenches between the blocks; and baking the photoresist. The arranging method of claim 5, wherein the step of forming the conductive layer further comprises: sputtering a conductive material on the substrate; coating a photoresist on the substrate; providing the optical compensation type reticle, And exposing the electrical lead pattern corresponding to the isoelectric wire to the photoresist through the optical compensation type reticle; and developing the electric lead pattern to form the pattern blocks adjacent to each other, and the electric Wire patterns are produced using overexposure and overexposure. The arranging method of claim 6, wherein the step of forming the protective layer further comprises: coating at least one of a photoresist, a sputter photoresist or an organic substance on the substrate; and baking the photoresist or The organic substance forms a hard protective film. A touch panel electrode structure comprising: a substrate layer; an alignment film layer disposed on one side of the substrate layer, the alignment film layer being composed of a plurality of bridged trenches; a first transparent conductive layer Provided on one side of the alignment film layer, and the first transparent conductive layer has a plurality of pattern blocks disposed adjacent to each other, and the pattern blocks are not connected to each other; a conductive layer is adjacently disposed on the alignment film The other side of the layer; a protective layer disposed on the conductive layer; and an outer frame wire layer disposed between the substrate and the protective layer; wherein the bridged trenches straddle the pattern Between the blocks, the pattern blocks are connected to each other by the bridge grooves. The touch panel electrode structure of claim 8 further comprising a second transparent conductive layer disposed on the other side of the substrate layer.