TWI509484B - Touch-sensitive panel device and electrode structure therein - Google Patents

Description

Touch panel device and electrode structure thereof

A touch panel device and an electrode structure thereof, in particular, a metal electrode structure having an anti-reflection function, and a touch panel device composed of the electrode structure.

In the conventional art of panel using metal electrode wires (metal mesh), an additional anti-Glare film is required to eliminate the metal reflection caused by the metal wires in the panel, and these reflections may cause display quality. The problem of falling.

It is known that the anti-glare treatment film may increase the thickness of the touch panel and affect the light transmission of the light-transmitting region; at the same time, the optical-grade plastic substrate itself may also cause reflection, and the reflection is easy to cause visual fatigue of the human eye. In combination with the reflection of the aforementioned metal wires, the reflection interference is even worse, making it easier for the human eye to observe the interference phenomenon of the metal wires.

FIG. 1 is a schematic cross-sectional view showing the structure of a substrate and an electrode structure applied to a touch display device in the prior art.

The touch panel portion includes the electrode structure 101 and 102 of the substrate 10 and the upper and lower surfaces thereof. When the touch display device is formed, an optically clear adhesive 11 is disposed thereon, and the optical adhesive 11 is adhered in order to eliminate the panel. The reflective anti-glare treatment film 12 of the metal material is then attached to the upper substrate 14 with the optical glue 13. Under the structure, the substrate 10 is disposed on the liquid crystal display module 16 through the optical adhesive 15.

In the prior art, there is also a solution for reducing the reflection of metal as described above, such as plating a black layer on the structure of a metal (such as copper) grid, thereby adjusting the screen. The color difference is different from the grid structure, but the blackening layer reduces the conductivity of the metal layer regardless of the metal or oxide layer used, and has poor resistance to environmental corrosion.

For a stack of conductive electrodes and substrates in a touch panel of the prior art, reference may be made to the cross-sectional view shown in FIG.

The plastic substrate 21 is displayed in the panel, and the first electrode 23 is formed above. The electrode structure is a metal material, which causes metal reflection, so that a first blackening layer 25 can be formed on the surface thereof to reduce the metal and the screen. The color difference produced. As shown in the figure, when the incident light 201 is incident on the first electrode 23, the original reflected light 202 will be reflected by the first blackening layer 25; then, as seen by the incident light 203, the light is directed toward the plastic substrate 21. It is also reflected by the substrate, such as reflected light 204.

Another electrode layer is also formed on the other side surface of the plastic substrate 21, as shown by the second electrode 29, and a second blackening layer 27 is also formed on the outer surface of the second electrode 29. As shown, the light that is incident on the plastic substrate 21 is penetrated and then hits the second electrode 29, and the reflected light 205 is perceived.

As described above, in the prior art, the anti-glare structure is used to reduce the metal reflection phenomenon, or the blackening layer is formed on the electrode structure to reduce the color difference between the metal and the screen, and the reflection problem cannot be effectively solved, but an increase occurs. The thickness of the panel reduces the conductivity of the metal covered and has low corrosion resistance.

In view of the conventional technology, the metal electrode wire is used to produce metal reflection, and directly covering the anti-glare film on the electrode will cause the panel display quality to be degraded, or the blackening layer may be used to avoid the color difference between the metal and the screen, but cause The invention discloses a touch panel device, an electrode structure and a process, wherein the design of the electrode structure can effectively eliminate the reflection caused by the metal or the substrate, and can effectively reduce the thickness of the touch panel without affecting. Display quality, high light transmission and metal conductivity, and excellent weather resistance, corrosion resistance in high temperature salt bath environment.

According to one embodiment, the electrode structure is mainly provided with a metal conductive layer formed on the surface of the substrate as a conductive structure of the electrode structure; the thinned and roughened structure is successively formed on the surface of the metal conductive layer for reflecting the metal Scattered or used to reduce the reflection of the metal conductive layer and the substrate. The formation of the thinned roughened structure can be formed by etching or processing on the metal conductive layer, or by electrolysis, sputtering, deposition or coating. Forming; a blackening layer is formed on the surface of the thinned roughened structure, so that the blackening layer also has a shaving effect for absorbing light incident on the metal conductive layer, and the incident light is not consistently Reflect in the same direction to resist metal reflection.

Based on the foregoing electrode structure, the electrode structure may further include an adhesive layer through which the electrode structure is combined with the substrate to improve the adhesion between the electrode structure and the substrate. Meanwhile, the adhesive layer may have a structure of shading and roughening.

In another embodiment of the electrode structure, the main structure comprises a metal conductive layer and a blackened layer having a rough surface, which is directly etched or processed on the blackened layer to form a rough surface, which has a blackened surface The layer reduces the light scattering from the reflection of the metal conductive layer through the surface structure and reduces the amount of light reflection. Similarly, an adhesion-promoting bonding layer may be formed between the electrode structure and the substrate; meanwhile, the bonding layer may have a structure of shading and roughening.

In the foregoing embodiment, another blackening layer may be formed on the surface of the blackening layer, thereby increasing the resistance of the blackening and blackening; and the adhesion between the bonding layer and the metal conductive layer may be further formed. Another subsequent layer; at the same time, another subsequent layer may have a structure that is shaved and roughened.

According to the embodiment of the further electrode structure, the electrode structure mainly has an adhesive layer, a metal conductive layer and a first blackening layer. The first blackening layer is formed on the surface of the metal conductive layer to absorb the metal. The light of the conductive layer is reflective with metal, and then a second blackening layer is formed on the surface of the first blackening layer, and then etched or processed on the surface of the second blackening layer to form a rough surface structure, thereby enhancing anti-reflection The effect is reduced by the color cast of the screen. The electrode structure of the embodiment of the present invention may have two or more layers, a blackening layer and a shaved rough layer, and is not intended to limit the invention.

The electrode structures described in the above embodiments are combined with a substrate to form a touch panel device.

In still another embodiment, the surface of the substrate may also be formed with a shaved and roughened structure, the main purpose of which is to enable the light entering the substrate to be scattered, thereby effectively avoiding visually uncomfortable reflection.

In the embodiment in which the thinned and roughened structure is formed in the substrate and the electrode structure, when combined with other components, the optical adhesive may be filled, and the optical adhesive fills the gap of the roughened structure on the surface of the transparent region of the substrate. It can reduce the haze which is enhanced by the shaving and roughening, and make the blackening layer with rough surface darker and reduce the color shift with the screen.

In order to further understand the technology, method and effect of the present invention in order to achieve the intended purpose, reference should be made to the detailed description and drawings of the present invention. The drawings and the annexed drawings are intended to be illustrative and not to limit the invention.

10‧‧‧Substrate

101,102‧‧‧Electrode structure

11,13,15‧‧‧Optical adhesive

12‧‧‧Anti-glare treatment film

14‧‧‧Upper substrate

16‧‧‧LCD module

21‧‧‧Plastic substrate

23‧‧‧First electrode

25‧‧‧First blackening layer

29‧‧‧second electrode

27‧‧‧Second blackening layer

201, 203‧‧‧ incident light

202,204,205‧‧‧ Reflected light

30‧‧‧Substrate

32‧‧‧Electrode structure

301‧‧‧Metal conductive layer

302‧‧‧Doughening rough layer

303‧‧‧Blackening layer

40‧‧‧Substrate

401‧‧‧Next layer

42‧‧‧Electrode structure

402‧‧‧Metal conductive layer

403‧‧‧Shaded roughened layer

404‧‧‧Blackening layer

52‧‧‧Electrode structure

50‧‧‧Substrate

501‧‧‧ first layer

502‧‧‧Secondary layer

503‧‧‧Metal conductive layer

504‧‧ ‧ shaved rough layer

505‧‧‧First blackening layer

506‧‧‧Second blackening layer

60,60'‧‧‧substrate

601'‧‧‧The first shaved rough layer

602'‧‧‧Second shaved roughening layer

601,602‧‧‧Diffuse roughening structure

70,70’‧‧‧substrate

72,72'‧‧‧electrode structure

701, 724‧‧ ‧ shaved rough layer

721‧‧‧ first layer

722‧‧‧second second layer

723‧‧‧Metal conductive layer

725, 725' ‧ ‧ the first blackening layer

726, 726'‧‧‧ second blackening layer

727‧‧ ‧ shaved roughening structure

80‧‧‧Substrate

801‧‧‧First shaved roughening layer

802‧‧‧Second shaved roughening layer

82‧‧‧First electrode structure

84‧‧‧Second electrode structure

811,812‧‧‧Optical adhesive

803‧‧‧Transparent substrate

804‧‧‧LCD module

90‧‧‧Substrate

901‧‧‧Doughening rough layer

923,923’, 923”‧‧‧Metal conductive layer

924,924’, 924”‧‧‧ first blackening layer

925, 925', 925" ‧ ‧ second blackening layer

Step S121~S129‧‧‧Electrode structure process

1 is a schematic cross-sectional view showing a conventional touch display device; FIG. 2 is a schematic cross-sectional view showing a conductive electrode and a substrate in a touch panel of the prior art; FIG. 3 is a schematic view showing an embodiment of a basic electrode structure of the present invention; 4 is a schematic view showing a second embodiment of the electrode structure of the present invention; FIG. 5 is a schematic view showing another embodiment of the electrode structure of the present invention; FIG. 6A is a view showing an embodiment of the surface structure of the substrate of the present invention; FIG. 7A is a schematic view showing an embodiment of an electrode structure of the present invention combined with a substrate; FIG. 7B is a second schematic view showing an embodiment of the electrode structure of the present invention and a substrate; FIG. 8 is a view showing the touch panel of the present invention; Schematic diagram of an embodiment; FIGS. 9 to 11 schematically show an embodiment of an electrode structure of the present invention; The flow shown in Figure 12 describes the steps in making the electrode structure.

The invention discloses a touch panel device, an electrode structure and a process. The touch panel adopts a metal or metal-based electrode structure or a wire, and in the electrode structure, in order to eliminate metal reflection, the metal material is permeated through the surface. Forming a resist blackening layer, and avoiding the problem of thickening of the structure for preventing reflection in the prior art, and avoiding the problem of lowering the conductivity due to the general blackening treatment, thereby proposing that the light transmittance and the metal are not affected. Conductive touch panel structure with anti-reflective metal electrode wires.

In the touch panel device disclosed in the present invention, the main structure of the embodiment includes a transparent substrate and a metal electrode or a wire on the substrate, which can be applied to a general touch panel or a flexible touch panel. The conductive metal surface is formed with a shaved and roughened structure, or formed by etching or the like, or formed by electrolysis, sputtering or deposition of other materials. In addition, a blackening layer can be formed, in addition to reducing the reflected light energy, and having the functions of optical matching and structural strengthening.

According to an embodiment of the device disclosed in the disclosure, the conductive metal or the surface of the substrate is a thin layer, and the thickness of the layer may be between 1 nm and 10 μm, more preferably between 50 nm and 2 μm. The blackening layer formed on the surface of the conductive metal serves the purpose of reducing the energy of the reflected light, and the characteristics of the blackening layer are in the chromaticity coordinate values composed of L (brightness), a (red green) and b (yellow blue). The ranges are L<50; a<-0.1; and b<-0.1.

First embodiment:

Fig. 3 is a view showing an embodiment of a basic electrode structure of the present invention. The figure shows that an electrode structure 32 is formed on the substrate 30. The basic structure of the electrode structure 32 includes a metal conductive layer 301 as a conductive medium, a thinned roughened layer 302 and a blackened layer 303. The structural features and fabrication can be referred to the description of FIG. 4 again.

In this example, the electrode structure 32 can be directly formed on the substrate 30, including an upper surface or a lower surface, wherein the main structure is a metal conductive layer 301, and the metal conductive layer 301 The main conductive structure in the electrode structure 32 can be formed on a specific structure by electrolysis, sputtering, or printing.

The way metal is used as the conductive structure, because the metal easily reflects external light, if it is applied to a display device, it may be visually affected, so the present invention adds a roughening means to the electrode structure, and there are various ways of roughening. As shown in this embodiment, a thinned roughened layer 302 is formed on the surface of the metal conductive layer 301, and can be produced in various manners, for example, by surface treatment on the metal conductive layer 301, or directly on the metal conductive layer. 301 additionally forms a rough structural layer having a surface structure. These surface structures can scatter the light reflected from the metal conductive layer 301.

In this embodiment, a blackening layer 303 is formed on the metal conductive layer 301 and the shaved roughening layer 302. The blackening layer 303 is disposed in the electrode structure 32, such as above the metal conductive layer 301, and its purpose is to absorb the external portion. The light that is incident on the electrode structure 32 can, in particular, reduce the color shift from the screen, and can also serve as a protective structure such as a reinforcing structure or an anti-corrosion.

Second embodiment:

The basic electrode structure diagram of the touch panel proposed in the present disclosure can be referred to FIG. 4, and the process steps can refer to the flow shown in FIG. 12 at the same time.

The substrate 40 (FIG. 12, S121) is placed first, and the electrode structure 42 is formed on the substrate 40 by using metal as a main material. In this example, an electrode structure is taken as an example, and the electrode array can be designed as a plurality of arrays according to requirements. structure. The substrate 40 includes a glass substrate or a plastic substrate suitable for a flexible touch panel. The material of the plastic substrate may be PET (Polyethylene terephthalatem, polyethylene terephthalate), PEI (Polyetherimide, polyetherimide). ), PPSU (Polyphenylensulfon, polyphenylene), PI (Polyimide, polyimide) or a combination thereof.

The electrode structure 42 includes an adhesive layer 401 adjacent to the contact substrate 40, and then the layer 401 is first formed on the surface of the substrate 40 (FIG. 12, S123), and the electrode structure 42 is transparent. The via layer 401 is bonded to the substrate 40. The function of the adhesive layer 401 is to improve the adhesion of the succeeding electrode structure to the substrate 40. In some embodiments, the adhesion may be enhanced by an additional adhesive layer; then the metal conductive layer 402 is formed on the adhesive layer 401 (FIG. 12, S125), the metal conductive layer 402 is the main conductive structure in the electrode structure 42, and can be formed on a specific structure by electrolysis, sputtering or printing. The material of the metal conductive layer 402 may be a conductive metal material such as silver or copper.

In an embodiment, the blackening layer 404 may be formed directly on the metal conductive layer 402 by electrolysis, sputtering, deposition or coating in order to reduce the color shift from the screen or to avoid the phenomenon of reflection by the metal conductive layer 402. (Fig. 12, S129), the blackening layer 404 can be used as a protective structure such as a reinforcing structure or an anti-corrosion, in addition to reducing the color shift and anti-reflection with the screen.

In this embodiment, before the blackening layer 404 is formed on the metal conductive layer 402, a thinned rough layer 403 may be formed on the surface of the metal conductive layer 402 (FIG. 12, S127). 403 is a thinned roughened structure, which may be a surface structure formed by surface treatment (roughening) on the metal conductive layer 402, such as etching, surface processing, etc.; or may be formed directly on the metal conductive layer 402. A layer of rough structure with a surface structure, such as by electrolysis, sputtering or deposition. These surface structures can scatter the light reflected from the metal conductive layer 402, or can simultaneously reduce the reflection of the metal conductive layer 402 and the substrate 40.

A blackening layer 404 may be further formed on the shaved roughening layer 403. The blackening layer 404 is formed on the surface of the shaved roughening layer 403, and may be formed by electrolysis, sputtering, deposition or coating on the shaving and roughening. Above the layer 403, a rough blackening layer structure is formed, so that a non-planar continuous structure is formed over the metal conductive layer 402 to diffuse and absorb light incident on the metal conductive layer 402, which is resistant to metal reflection, and at the same time It can increase the probability of electron tunneling without lowering the conductivity, and because the bonding strength is better than that of the metal conductor, it has the protective layer of resist. Since the blackening layer 404 is provided on the entire outer layer of the electrode structure 42, it is possible to assist in defining the appearance of the metal electrode.

Moreover, in an embodiment, the electrode structure 42 contacts other structures above, For example, the touch display device is formed by an optically clear adhesive (OCA) combined with other structures, including the upper film body, the substrate, the lower film body, the display module, etc., when the optical glue and the electrode structure 42 of this example are the uppermost layer. When the blackening layer 404 is combined, the characteristics of the blackening layer can be enhanced by the optical glue to reduce the degree of blackening and contrast, and the white fog interference of the rough surface is reduced, so that the user is more comfortable when viewing the touch display device.

Third embodiment:

For another embodiment, reference may be made to the schematic diagram of the electrode structure shown in FIG. 5, wherein the electrode structure 52 is formed on the substrate 50. The substrate 50 is provided with a transparent material such as plastic or glass. The main structure of the electrode structure 52 includes the connection substrate 50 and the electrode structure. a first adhesive layer 501 between 52, the first adhesive layer 501 can enhance the adhesion of the electrode structure 52 to the substrate 50; then another surface layer, such as the second adhesive layer 502, is formed on the surface of the first adhesive layer 501. The second adhesive layer 502 can further improve the adhesion of the continuous metal conductive layer structure to the substrate 50 and the first adhesive layer 501.

The metal conductive layer 503 is further formed on the second adhesive layer 502, which is a conductive layer in the electrode structure, and the material may be silver, copper, or the like, but the actual implementation is not limited to a specific material. In this example, the surface of the metal conductive layer 503 can be directly etched to form a thinned roughened layer 504 having a surface structure; or an additional surface shading is formed by electrolysis, sputtering or deposition. The layer 504 is roughened. The thinned roughened layer 504 can scatter the incoming light due to the surface structure without causing a consistent reflection.

Since the metal material of the metal conductive layer 503 itself easily reflects the incident light, it is also easily oxidized to cause a problem of a decrease in electrical conductivity. Therefore, the first blackening layer 505 having the resisting ability can be formed on the thinned roughening layer 504. The first blackening layer 505 is black or dark, which can effectively reduce metal reflection and reduction and color shift of the screen. Moreover, since the first blackening layer is a metal-based material, the conductivity of the electrode structure 52 can be maintained, and since it has better corrosion resistance than the metal conductive layer 503 or other structures, it can be used as a cladding structure as an electrode. The structural shape defines the auxiliary layer.

In addition to the above-mentioned layers, the first blackening layer 505 can form another blackening layer in a stacked form. The second blackening layer 506 shown in the figure also has the advantages of resisting ability, maintaining conductivity, and the like. It can improve the black chromaticity, and the roughness can also be enhanced to reduce the reflectance (anti-reflective).

In the above structure, the optical structure of the structure such as the adhesion layer, the shaved roughening structure, and the blackening layer can be formed to form a low-reflective or non-reflective electrode structure, so that the human eye can be comfortably viewed without being affected by the environmental backlight. The display content of the device.

The blackening layer formed on the electrode structure can prevent metal reflection and reduction and color shift of the screen, and the thinned structure can reduce internal and external reflection, and the upper and lower surfaces of the substrate can also be implemented as shown in FIG. For example, a surface roughening structure is formed, which increases the reflection problem of the overall structure, and is applied to the touch panel to increase visual comfort.

Fourth embodiment:

The thinned and roughened structure may also be formed on the substrate, as shown in FIG. 6A. In this example, the thinned roughened structure 601, 602 is formed directly on the substrate 60 by surface treatment, such as etching or surface processing. In more detail, the thinned roughened structure 601, 602 can be formed by chemical etching (sulfuric acid, permanganic acid, etc.), mechanical physics or plasma cleaning (such as rolling, ion beam, corona, atmospheric plasma). For example, the shaved and roughened structure 601, 602 has the same material as the substrate.

When an electrode structure is formed on the surface of the substrate 60, the thinned roughened structure formed here causes the incident light to not be uniformly reflected in one direction, which will help reduce the effect of reflection, and further reduce the light directly reflected by the surface of the substrate 60.

6B is a schematic view showing a surface structure for reducing reflection on the substrate 60'. This example schematically shows that a first thinned roughened layer 601' is formed on the upper surface of the substrate 60'. The purpose of the thinned roughened structure is to reduce The reflective surface may be formed on the surface of the integral substrate 60'. The thinned roughened layer 601', 602' of this example may be formed by adding material such as electrolysis, sputtering, coating, stamping or deposition. structure.

In this example, a second thinned rough layer may be formed on the lower surface of the substrate 60'. 602' is formed in such a manner as to form the first thinned roughened layer 601'. The first thinned roughened layer 601' formed on the upper and lower surfaces of the substrate 60' and the second thinned roughened layer 602' can effectively reduce the reflection from the external light incident structure and the interior (such as the backlight mode). Group) Shooting produces light that affects the vision. The black matrix that passes through the color filter of the screen backlight and the morie interference phenomenon easily generated by the arrangement of the metal electrodes can also be destroyed by the action of the second thinned rough layer. The regular backlight produced by the array reduces the problem of moiré. The establishment of the shaved and roughened structure on the substrate can have novel and progressive effects such as effectively reducing the thickness of the element and reducing the phenomenon of metal reflection and rubbing interference.

For the light incident, reference may be made to the prior art FIG. 2. According to the manner in which the incident light is reflected by the surface of the substrate, the second thinned rough layer 602' of the substrate 60' of this example may be connected to another The electrode structure on the lower surface (not shown in Figs. 6A, 6B), when the light is directed to the electrode structure on the lower surface, the shaved roughened structure on the surface of the substrate can effectively reduce the metal reflection of the electrode structure, thus the lower surface The setting of the second roughening layer 602' is more effective in reducing reflection.

The manner of forming the first thinned roughened layer 601' and the second thinned roughened layer 602' of this example is achieved by using an additional coating of ultraviolet glue or an organic-inorganic eucalyptus hardened layer. The material of the shaved rough layer is different from the material of the substrate.

The roughness (Ra, center line average roughness) range of the thinned roughened structure 601, 602 and the first thinned roughened layer 601' and the second thinned roughened layer 602' of the embodiment shown in FIG. 6A are shown in FIG. 6A. It is preferably from 0.001 to 0.2 um, and the optimum roughness range is Ra = 0.02 - 0.1 um.

Fifth embodiment:

FIG. 7A then shows a schematic diagram of an embodiment of forming an electrode structure 72 on a substrate 70 having a surface shaved roughened structure.

The electrode structure 72 is formed on the surface of the substrate 70 in a stack. The main structure of the electrode structure 72 includes a first adhesive layer 721 that is coupled to the substrate 70. The surface in contact with the substrate 70 can be formed as a shading as shown in FIG. Roughening structure, ie the cutting of this example Light roughening layer 701.

A further adhesive layer may be further formed on the first adhesive layer 721, such as the second adhesive layer 722 as illustrated, and the metal conductive layer 723 formed by the reinforcement is formed. The manner in which the metal conductive layer 723 is formed may be referred to the above embodiments, in order to reduce or In order to avoid the reflection of the metal conductive layer 723, the embodiment further forms another thinned roughening layer 724 in the electrode structure 72 on the metal conductive layer 723, and then forms a first one capable of resisting and blackening. The blackening layer 725 may also form another blackening layer on the first blackening layer 725, such as the illustrated second blackening layer 726, to enhance the resist and blackening in order to reduce the effect of color shift with the screen. The function of the effect.

In the stacked structure of this embodiment, since the outer surface is formed with a structure of shading or blackening, the effect of reducing or avoiding the reflection of the substrate 70 or the metal conductive layer 723 is reduced, and the color of the screen is reduced. Partial.

Sixth embodiment:

Fig. 7B shows that the shaved roughened structure (Fig. 7A, 724) can be directly processed in the last process in the process, and can be realized on the substrate and the electrode at the same time. When performing the final processing, the embodiment may realize the thinning and roughening structure by using an additional coating of ultraviolet glue or an organic-inorganic eucalyptus hardened layer. The method of producing the roughened rough layer material and the electrode Different from the substrate material. The processing method may form the thinned roughened structure in a manner such as electrolysis, sputtering, coating, stamping or deposition.

As shown in FIG. 7B, the thinned layer 724 formed on the metal conductive layer 723 is not formed in the electrode structure 72' formed on the substrate 70', but the original substrate 70' may not be used first. Forming a thinned roughened layer (as shown in FIG. 7A, 701), but directly forming a first blackening layer 725' or a second blackening layer 726' directly on the metal conductive layer 723, and then finally In the processing process, the thinned roughened structure 727 is formed on the substrate 70' and the electrode structure 72' at the same time.

In the above embodiments, taking FIG. 7A or FIG. 7B as an example, the first adhesive layer 721 and/or the second adhesive layer 722 may be a polymer, an oxide or a metal material, or a combination thereof. In detail, the polymer material contained in the first adhesive layer 721 is It helps to improve the adhesion of the first adhesive layer 721 to the substrate 70. The oxide material contained in the first adhesive layer 721 and/or the second adhesive layer 722 has such characteristics that the adhesive layer has anti-reflection, anti-interference, anti-rainbow, anti-wear, and scratch resistance. If the metal material contained in the first adhesive layer 721 is used, the adhesion between the first adhesive layer 721 and the second adhesive layer 722 can be improved.

Among the materials of the layers in the stack, the polymer material comprises acrylic, PET, PEI, PPSU, PI, PEDOT, Polyaniline, Polypyrrole or a combination thereof. The oxide may be an amorphous or polycrystalline oxide film or a powder structure. The composition of the oxide may be titanium oxide, tantalum oxide, silicon oxide, aluminum oxide or a combination thereof. The metal may comprise copper, silver, aluminum, molybdenum, nickel, chromium, tungsten, titanium, niobium, zinc, tin, iron, and other alloys or combinations thereof. It can also be obtained by polymer or metal or oxide combination, such as metal-oxide combination, polymer-metal combination, polymer-oxide combination or metal and oxide and polymer. The combination of composite materials. If a composite material is used, the proportion of the polymer is 10-90%, the proportion of the oxide is 10-90%, and the proportion of the metal is 10-90%. The oxide may also be a multilayer structure.

According to an embodiment, the titanium oxide may have a thickness of about 900 nm, and the cerium oxide may have a thickness of about 100 nm. The thickness of the first adhesive layer 721 and/or the second adhesive layer 722 is preferably in a range between 0.001 um and 1 um; the 721 reflectance of the first adhesive layer and/or the second adhesive layer 722 is required to be between 1% and 50. The range of % is preferably less than 30%. In addition, the first adhesive layer 721 and/or the second adhesive layer 722 can also be roughened by processing to achieve the effect of eliminating reflected light. The manner of forming the first adhesive layer 721 and/or the second adhesive layer 722 is as follows: (1) increasing the energy of the first bonding layer sputtering, causing the material of the bonding layer to blast into the substrate; (2) adding a colored polymer such as poly The aniline is in the adhesive layer; or (3) the adhesive layer material is etched into a porous structure or the like.

The metal conductive layer 723 material may be copper, gold, silver, aluminum, tungsten, iron, nickel, chromium, titanium, molybdenum, indium, tin or a composite material thereof, and the thickness is 0.001 um. The range to 5um is preferred.

In order to increase the adhesion and conductivity of the electrode structure 72, if the metal conductive layer 723 is a pure metal, the second subsequent layer 722 adjacent thereto may contain more than 50% of the pure metal, and the first adhesive layer 721 may A gradation structure containing less than 50% pure metal. For example, if the conductive layer 723 is pure copper, the first adhesive layer 721 may be a nickel copper ferrochrome alloy, the composition of which is nickel: copper: chromium: iron = 60:30:10:0 or nickel: copper: chromium: iron = 80:10:5:5. The first adhesive layer 721 may also be a nickel-tungsten alloy having a composition of nickel: tungsten = 50:50. The first subsequent layer 721 may additionally be doped with phosphorus or the like. The second adhesive layer 722 can be a copper-nickel-chromium alloy having a composition of copper:nickel:chromium=60:30:10. Or copper-nickel-tungsten alloy, the composition of which is copper: nickel: tungsten = 60: 20: 20; the second subsequent layer 722 may additionally add bismuth and phosphorus.

The shaved roughening layer 724 disposed in the electrode structure 72 is a shaved and roughened structure, and the surface thereof can be improved in a destructive manner by means of physical mechanical roughening (rolling, plasma etching) or chemical etching. Roughness, so the material is the same material as the metal conductive layer 723.

According to the structural design of the thinned roughened layer (as shown in FIG. 7A, 724), the structure may be additionally extended, and the thinned roughened layer 724 may be added to cover the metal conductive layer 723. The material of the thinned roughened layer 724 may be combined with the metal. The conductive layer 723 is different. Such as: (1) changing the coating conditions, including dry coating: sputtering, evaporation, etc.; or wet coating: electroplating, plating, etc., the thinned rough layer 724 is plated into a discontinuous island-like distribution to form a rough Surface or porous structure; or (2) firstly plate the thinned rough layer 724 material into a flat continuous structure, using physical mechanical roughening (rolling, plasma etching) or chemical etching to destroy The way to improve its surface roughness. The material of the thinned roughened layer 724 produced by the growth method may be a polymer, an oxide and a metal, may be the same as the metal conductive layer 723, or may be the same as the first blackening layer 725.

The thinned roughened layer 724 can affect the surface roughness of the electrode structure 72, has anti-light reflection and increases the ability of the photoresist or the thermal resist to adhere to the surface of the electrode structure 72, and does not require additional anti-glare treatment on the touch panel. Membrane, so it can reduce costs while Does not affect the etching of fine lines. The surface roughness of the roughened layer 724 is preferably Ra = 0.001 um to 0.2 um, and the optimum roughness is Ra = 0.02 um to 0.1 um. The reflected optical haze should be less than 2.

The first and/or second blackening layer 725/726 material may be copper, silver, aluminum, molybdenum, nickel, chromium, tungsten, titanium, tantalum, zinc, tin or iron, or a combination thereof. The thickness of the first blackening layer 725 and/or the second blackening layer 726 is preferably in the range of 0.001 um to 1 um; the reflectance of the first blackening layer 725 and/or the second blackening layer 726 may be 1%. Up to 50%, preferably less than 30%.

The second blackening layer 726 mentioned above is another blackening layer formed, which can be coated on the first blackening layer 725, can enhance the ability of resisting and blackening, and increase the environmental adaptability of the overall structure, and The first blackening layer 725 is assisted in adjusting the color chromaticity and light reflection ability of the overall electrode. The second blackening layer 726 material can be an oxide, a polymer, carbon, and a mixture thereof. The oxide may be cerium oxide, titanium oxide, aluminum oxide or a mixture thereof. The polymer may be acrylic (acrylic acid), alkylbenzimidazole (alkyl benzene) mixture, alkyl benzene compound, PET or colored organic matter: PEDOT, polyaniline or a mixture thereof.

Wherein, in the mixture of the second blackening layer 726, the proportion of the polymer may be 10-90%, and the ratio of the oxide may be 10-90%. The second blackening layer 726 preferably has a thickness in the range of 0.001 um to 1 um; the second blackening layer has a 726 reflectance in the range of 1% to 50%, preferably less than 30%. In addition, the overall reflectance produced by the first blackening layer 725 and the second blackening layer 726 should be less than 30%. For example, when the device is applied to a display, when the screen is turned off, the reflectance is lower than 30%, the chromaticity coordinate red-green axis (a/-a axis) is lower than -2, and the yellow-blue axis (b/-b axis) ) below -4. In particular, a screen equipped with a polarizer has a chromaticity that is more blue-green, and the screen on which the polarizer is mounted has a b value of about -7.

Therefore, the first blackening layer 725 can simultaneously adjust the metallic color of the metal thin wire to match the color of the metal thin wire itself (for example, the reflectivity of the pure copper metal base material is >50%, L>90%, a<0.1, b>2). ) close to the black matrix (Black matrix: BM) Color, reducing contrast chromatic aberration. If the b value is greater than 1 or the reflectance is greater than 50%, it is easy for the human eye to observe a yellowish metal reflection. The chromaticity of the first and second blackening layers 725/726 material itself may vary due to material thickness. The second blackening layer 726 can adjust the chromaticity of the covered first blackening layer 725 to be closer to the color of the black matrix of the screen, and has anti-color shift, anti-reflection, anti-aliasing interference, anti-rainbow pattern , anti-wear, scratch resistance.

However, the disclosure of the present invention provides a specific embodiment for forming a roughened, reduced reflected light in an electrode structure, and the present invention is not limited to the various embodiments set forth in the disclosure.

Seventh embodiment:

Still another embodiment is shown in FIG. 8. This example shows a schematic diagram of an embodiment of the substrate and electrode structure of the present invention applied to a touch panel.

In addition to the embodiment in which the shaved roughened structure is formed on one surface of the substrate, this example further shows that the upper and lower surfaces of the substrate 80 are formed with a shaved roughened structure, such as the first shaved roughening layer 801 and the second shaved light. The roughened layer 802 can be formed by chemical etching (sulfuric acid, permanganic acid, etc.), mechanical physics or plasma cleaning (such as rolling, ion beam, corona, atmospheric plasma).

The first electrode structure 82 formed on the upper surface of the substrate 80 on the first thinned roughening layer 801 and the second electrode structure 84 formed on the lower surface may have the same structure, and the structure description can be referred to FIG. 7A or FIG. 7B. The first electrode structure 82 and the second electrode structure 84 have structures capable of resisting color shift, anti-reflection, anti-aliasing interference, anti-rainbow, anti-wear, and scratch resistance, such as an adhesive layer, a blackening layer, and a shaving roughening. For the structure and the like, the embodiment can refer to the description of FIG. 7A or FIG. 7B. A first thinned roughened layer 801 that is reflective of the substrate 80 is formed on the outward surface of the substrate 80, and the second thinned roughened layer 802 is capable of reducing or avoiding metal reflection formed by the second electrode structure 84. When viewed from the outside (above the figure), the visual effect can be improved due to the greatly reduced metal reflection, which increases the comfort of the human eye, and has the function of effectively reducing the thickness of the component and reducing the phenomenon of the crease interference.

The touch panel device is formed by the substrate 80 and the electrode structures 82/84. When the device is combined with other components to form the touch display panel device, as shown in the figure, the optical adhesives 811, 812 can be used as an adhesive. For example, the touch panel device formed by the substrate 80 and the electrode structures 82/84 is combined with the upper optical component by the optical adhesive 811, such as the transparent substrate 803 and related optical components, and the optical adhesive 812 and the liquid crystal display module. 804 (this example is below) combined. If the surface of the combination of the substrate 80 and the electrode structure 82/84 is formed with a shaved roughened structure, when combined with other components, the optical adhesive 811, 812 can fill the gap of the surface roughening structure when the optical adhesive 811, 812 is filled. The haze of the light-transmitting region can be reduced due to the roughening, and the light transmittance of the light-transmitting region can be increased.

However, after the optical adhesives 811 and 812 are attached, the roughness of the first thinned roughening layer 801 and the second thinned roughened layer 802 formed on the surface of the substrate 80 may be lowered by the human eye in the light transmitting region due to the relationship of the optical adhesives 811 and 812. Haze feeling. In addition, since the optical adhesive 811, 812 material is close to the substrate 80 and the refractive index difference is small, when filling the rough surface on the touch panel device, not only the transmittance of the transparent region of the substrate 80 can be increased, but also the additional The color of the resist blackening layer is more pure black or a color similar to the black matrix of the screen, reducing the white mist effect caused by fogging, and does not affect the effect of the shaved layer on the electrode to effectively shield Metal mesh for improved eye comfort.

It is worth mentioning that the present invention is different from the general application of a thin film material having a relatively low refractive index on a substrate, that is, an anti-reflection film, which can improve the transmittance of the substrate, and the application of the optical adhesive used in accordance with the present invention When the surface of the substrate (such as PET) is roughened, the covering optical glue can fill the roughened structure of the surface, and the haze can be reduced due to roughening. For example, the refractive index of the glass of the optical glue and the panel device may be lower than that of PET, thereby increasing the transmittance. The above structural data such as: surface glass refractive index: 1.53; optical adhesive refractive index: 1.46-1.47, optical grade PET refractive index: 1.62.

Embodiments of the electrode structure may not be limited to the above figures, and the following figures show different electrode structure embodiments in which the adhesive layer, the metal conductive layer, the thinned roughened layer and the blackened layer are contained, Manufacturing method and stacking relationship as in the above embodiments The contents are not described here.

In one embodiment shown in FIG. 9, the surface of the substrate 90 has a shading-reducing roughening structure, as shown by the shaved roughening layer 901, and an electrode structure is formed thereon. The embodiment shows that the main components of the electrode structure can be seen. 7A, 7B and 8 above, the actual implementation is not limited to the above structure, in which the metal conductive layer 923 is directly eroded or processed to form a shaved roughened structure, forming a thinned roughened layer, so that the succeeding structure is also formed. The rough surface, such as the first blackening layer 924 and the second blackening layer 925, both form a rough surface with the thinned roughened structure of the metal conductive layer 923.

Or in the electrode structure embodiment shown in FIG. 10, in the electrode structure formed on the shaved roughening layer 901 on the surface of the substrate 90, the first blackening layer 924' formed on the metal conductive layer 923' is directly etched or processed. The roughened layer is formed to form a blackened layer having a rough surface, that is, the aforementioned shaved roughened structure is directly formed by processing the blackened layer. Here, the first blackening layer 924' is formed on the metal conductive layer 923' by electrolysis, sputtering, deposition or coating. The rough surface is formed after the surface of a blackening layer 924' is etched or processed. The first blackening layer 924' having a rough surface can be reflected from the metal conductive layer 923' through the surface structure. The formed reflection is scattered, which further reduces the amount of reflection.

Next, another blackening layer, such as the second blackening layer 925' as shown, may be formed on the first blackening layer 924' having a rough surface, also formed along with the surface structure of the first blackening layer 924'. Rough surface.

Further, as shown in the embodiment shown in FIG. 11, the first blackening layer 924" on the metal conductive layer 923" in the electrode structure is unchanged, and the second blackening layer 925" is directly etched or processed to roughen the surface. The second blackening layer 925 having a rough surface is successively formed on the surface of the first blackening layer 924", and reflects the reflection formed by the reflection of the metal conductive layer 923" through the surface structure, and reduces the amount of reflection.

In the step of fabricating the two blackening layers, the first blackening layer 924" is formed on the metal conductive layer 923" by electrolysis, sputtering, deposition or coating; the second blackening layer 925" is electrolyzed. , sputtering, deposition or coating methods are formed on the first blackening layer 924" Above, the two have similar production methods.

In the embodiment shown in FIG. 11, the material of each component in the electrode structure and its composition can be referred to the above embodiments. The material combination, thickness, and reflectance requirements of the first or second blackening layer in this example can also be referred to. What has been described in the above embodiments.

Therefore, the touch panel device of the present invention has a structure different from that of the conventional metal grid touch panel in which a blackening layer is coated on the copper layer to reduce metal reflection, and the structure utilizes the structure and material. Design, in addition to eliminating the problem of reflective metal and plastic substrates, can effectively reduce the thickness of the touch panel, and does not affect the haze of the transparent region; at the same time, does not affect the conductivity of the copper conductive layer, and has excellent Weather resistance, excellent life in a high temperature salt bath environment.

The above descriptions are only preferred embodiments of the present invention, and all changes and modifications made in accordance with the scope of the patent application of this creation should be covered by this creation.

30‧‧‧Substrate

32‧‧‧Electrode structure

301‧‧‧Metal conductive layer

302‧‧‧Doughening rough layer

303‧‧‧Blackening layer

Claims (22)

An electrode structure comprising: a metal conductive layer as a conductive structure of the electrode structure; a blackening layer for absorbing light incident on the electrode structure to eliminate reflection caused by the metal conductive layer and reducing the screen a color-shearing structure formed in the electrode structure, comprising being formed on a surface of the metal conductive layer or on a surface of the blackening layer, the thinned roughened structure entering the electrode structure through the surface structure The light, or the reflection formed by the reflection of the metal conductive layer, scatters and at the same time resists the interference of the crease. The electrode structure according to claim 1, wherein when the thinned roughening structure is successively formed on the surface of the metal conductive layer, the thinned roughened structure is formed after etching or processing the surface of the metal conductive layer. The material of the shaved roughened structure is the same as the metal conductive layer. The electrode structure according to claim 1, wherein when the shaved roughening structure is successively formed on a surface of the metal conductive layer, the shaved roughening structure forms a surface structure on the metal conductive layer. The thinned layer is cut, and the material of the roughened structure is different from the metal conductive layer. The electrode structure according to claim 1, wherein when the shaved roughening structure is formed on a surface of the blackening layer, the shaved roughening structure is formed after etching or processing the surface of the blackening layer, The shaved roughened structure material is the same as the blackened layer. The electrode structure according to claim 1, wherein when the shaved roughening structure is formed on a surface of the blackening layer, the shaved roughening structure forms a surface having a surface structure on the blackening layer. The light roughening layer is different from the blackening layer. The electrode structure of claim 5, wherein another blackening layer is formed on the surface of the blackening layer to increase the resist, reduce the color shift of the screen, and enhance the blackening ability. The electrode structure according to any one of claims 1 to 6, wherein the blackening layer is formed by electrolysis, sputtering, deposition or coating. The electrode structure according to claim 7, wherein the blackening layer or the other blackening layer also forms a rough surface along with the shaved roughening structure. The electrode structure of claim 8, wherein the blackening layer or the material of the other blackening layer is copper, silver, aluminum, molybdenum, nickel, chromium, tungsten, titanium, tantalum, zinc, tin or iron, or It is a combination of materials therein; the blackening layer or the other blackening layer has a thickness ranging from 0.001 um to 1 um; and the blackening layer or the other blackening layer has a reflectance ranging from 1% to 50%. The electrode structure of any one of claims 1 to 6, wherein the electrode structure is formed on a substrate. The electrode structure of claim 10, wherein the surface of the substrate is formed with a shaved roughening structure formed by etching or processing the surface of the substrate, the shaved roughening structure material and the The substrates are the same. The electrode structure according to claim 10, wherein the shaved roughening structure is formed on the substrate by a shaved roughening layer having a surface structure, the material of the shaved roughening structure being different from the substrate. The electrode structure of claim 10, further comprising an adhesive layer formed between the metal conductive layer and the substrate, wherein the electrode structure is bonded to the substrate through the adhesive layer to enhance the electrode structure and The adhesion of the substrate. The electrode structure of claim 13, wherein another adhesive layer is formed between the adhesive layer and the metal conductive layer. The electrode structure of claim 14, wherein the adhesive layer or the further adhesive layer is a polymer, an oxide or a metal material, or a combination thereof; the thickness of the adhesive layer or the further adhesive layer is 0.001 um to 1 um; the reflectivity of the adhesive layer or the further adhesive layer ranges from 1% to 50%. A panel device comprising: a substrate having at least one surface; and one or more electrode structures formed on the surface, wherein the electrode structure comprises: a metal conductive layer, the conductive structure of the electrode structure; a blackening layer for absorbing light incident on the electrode structure to eliminate reflection caused by the metal conductive layer and reducing color shift from the screen; a thinned roughened structure formed in the electrode structure, including formation On the surface of the metal conductive layer or on the surface of the blackening layer, the thinned roughened structure transmits light that enters the electrode structure through the surface structure or is reflected by reflection from the metal conductive layer. The panel device of claim 16, wherein the surface of the substrate is formed with a shaved roughened structure. The panel device of claim 16, wherein the optical glue is filled in combination with the one or more electrode structures in combination with other components in the panel device. The panel device of claim 18, wherein the optical glue is used to fill a gap between the substrate and the thinned roughened structure of the surface of the one or more electrode structures to reduce fogging of the light-transmitting region due to roughening Degree, increase the light transmittance of the light transmission area. A panel device comprising: a substrate having at least one surface; and one or more electrode structures formed on the surface, wherein the electrode structure comprises: a metal conductive layer, which is a conductive structure of the electrode structure; a layer for absorbing light incident on the electrode structure to eliminate reflection caused by the metal conductive layer and reducing color shift from the screen; a thinned roughened structure formed simultaneously on the one or more electrode structures On the surface of the substrate, the shaved roughened structure scatters the light reflected by the reflection of the light entering the electrode structure and the substrate through the surface structure. The panel device of claim 20, wherein the electrode structure and the shaved roughening structure on the surface of the substrate are formed by coating an ultraviolet glue or an organic-inorganic eucalyptus hardened layer. The panel device of claim 20, wherein the electrode structure and the shaved roughening structure on the surface of the substrate are formed by electrolysis, sputtering, coating, stamping or deposition.