Patent Publication Number: US-2015060253-A1

Title: Decorative substrate and touch panel

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the priority benefit of Taiwan application serial no. 102131062, filed on Aug. 29, 2013. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The invention relates to a substrate and a panel, and more particularly to a decorative substrate and a touch panel. 
     2. Description of Related Art 
     As information technology, wireless mobile communication, and information electric appliances rapidly develop in recent years, input devices for many intelligent information electronic products have been changed from conventional keyboards and mice to touch panels for the purposes of convenience, miniaturization, and being user-friendly. Especially, a touch display panel has become the most popular product among all. Current touch panels mainly include capacitive, resistive, photosensitive touch panels, among which the capacitive touch panels are the main stream product. 
     In a conventional design, a decorative substrate covering on the top of an electronic product and a substrate of the touch panel have the problems of minor cracks on edges and low intensity after the substrate is cut into a predetermined form, thus a secondary strengthening process for the substrate is required to eliminate the cracks on the edges of the substrate. The secondary strengthening process includes performing an acid-etching step on the edges of the substrate after an etching-resistant film is attached on the surface of the substrate. However, after the etching-resistant film is attached, a side etching of an acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on) on the edges of the substrate are prone to extend inwardly during the second strengthening process, resulting in problems of poor appearance such as white borders, black borders or white spots, and even damages and malfunctions to devices. 
     SUMMARY OF THE INVENTION 
     The invention is directed to a decorative substrate capable of solving problems of poor appearance caused by an acid solution during a strengthening process of a substrate. 
     The invention is further directed to a touch panel capable of providing both ideal strength and ideal appearance. 
     The invention provides a decorative substrate which has a first region and a second region at least partially surrounding the first region. The decorative substrate includes a substrate, a decorative layer and a protective layer. The substrate has a first surface and a first sidewall. The decorative layer is disposed on the first surface and in the second region. The decorative layer has a second sidewall adjacent to the first sidewall of the substrate, and the first surface disposed between the second sidewall and the first sidewall is defined as an outer border region. The protective layer is at least partially disposed in the outer border region of the first surface. 
     The invention also provides a touch panel which has a first region and a second region at least partially surrounding the first region. The touch panel includes a substrate, a decorative layer, a conductive structure and a protective layer. The substrate has a first surface and a first sidewall. The conductive structure is disposed on the first surface, and including a first region conductive unit disposed in the first region and a second region conductive unit disposed in the second region. The decorative layer is disposed on the first surface and in the second region. The decorative layer has a second sidewall adjacent to the first sidewall of the substrate, and the first surface disposed between the second sidewall and the first sidewall is defined as an outer border region. The protective layer is at least partially disposed in the outer border region of the first surface. 
     In an embodiment of the invention, the first region conductive unit includes a plurality of first electrodes electrically insulated to each other. 
     In another embodiment of the invention, the first region conductive unit further includes a plurality of second electrodes, and the second electrodes are electrically insulated to the first electrodes. 
     In another embodiment of the invention, the second region conductive unit includes a plurality transmitting lines, and the transmitting lines is connected to the first region conductive unit. 
     In another embodiment of the invention, the first region conductive unit is composed of the single-layer conductive layer. 
     In another embodiment of the invention, the first region conductive unit is composed of the multi-layer conductive layer. 
     In another embodiment of the invention, the multi-layer conductive layer is separated by an insulating member. 
     In another embodiment of the invention, the protective layer and the insulating member are formed in a same layer. 
     In each embodiment of the invention, the protective layer has a third sidewall adjacent to the first sidewall of the substrate, and a distance between the third sidewall and the first sidewall is less than 500 μm. 
     In each embodiment of the invention, the protective layer includes a first portion disposed in the second region and at least one second portion disposed in the outer border region of the first surface. 
     In each embodiment of the invention, the protective layer includes a first portion covering the decorative layer and at least one second portion disposed in the outer border region of the first surface. 
     In each embodiment of the invention, the first portion and the at least one second portion including a fourth sidewall and a fifth sidewall, respectively. The at least one second portion is disposed between the first sidewall of the substrate and the fourth sidewall of the first portion, and a distance between the fifth sidewall of the at least one second portion and the first sidewall of the substrate is less than 500 μm. 
     In each embodiment of the invention, the first portion further extends from the decorative layer to the outer border region, and a width of the at least one second portion is greater than 10 μm. 
     In each embodiment of the invention, a width of the at least one second portion is greater than 10 μm. 
     In each embodiment of the invention, a material of the protective layer is identical to a material of the decorative layer. 
     In each embodiment of the invention, a material of the protective layer is an insulating material. 
     In each embodiment of the invention, the insulating material includes a silicon nitride, an acid-resistant material, an organic material or an inorganic material. 
     In each embodiment of the invention, a first etching-resistant film and a second etching-resistant film are further included. The first etching-resistant film covers the first surface of the substrate, and the second etching-resistant film covers a second surface of the substrate on an opposite side of the first surface. 
     In each embodiment of the invention, a first adhesive layer and a second adhesive layer are further included. The first adhesive layer is disposed between the first etching-resistant film and the first surface of the substrate, and the second adhesive layer is disposed between the second etching-resistant film and the second surface of the substrate. 
     Based on above, because the decorative substrate and the touch panel of the invention are respectively provided with the protective layer disposed in edge regions adjacent to the sidewalls of the substrate, the side etching of the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on) during the strengthening process for the substrate can be blocked. Accordingly, devices around the edge regions of the substrate can be protected from corrosion by the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on), such that the problems of poor appearance can be effectively solved. Moreover, performance of the devices can also be improved. 
     To make the above features and advantages of the disclosure more comprehensible, several embodiments accompanied with drawings are described in detail as follows. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic top view of a decorative substrate according to the first embodiment of the invention. 
         FIG. 2  is a cross-sectional view illustrating the decorative substrate depicted in  FIG. 1  along line I-I′. 
         FIG. 3  is a cross-sectional view of an outer border region of a decorative substrate according to the second embodiment of the invention. 
         FIG. 4  is a cross-sectional view of an outer border region of a decorative substrate according to the third embodiment of the invention. 
         FIG. 5  is a cross-sectional view of an outer border region of a decorative substrate according to the fourth embodiment of the invention. 
         FIG. 6  is a cross-sectional view of an outer border region of a decorative substrate according to the fifth embodiment of the invention. 
         FIG. 7  is a cross-sectional view of an outer border region of a decorative substrate according to the sixth embodiment of the invention. 
         FIG. 8  is a schematic top view of a touch panel according to the seventh embodiment of the invention. 
         FIG. 9  is a schematic top view of a touch panel according to the eighth embodiment of the invention. 
         FIG. 10  is a schematic top view of a touch panel according to the ninth embodiment of the invention. 
         FIG. 11  is a schematic top view of a touch panel according to the tenth embodiment of the invention. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
       FIG. 1  is a schematic top view of a decorative substrate  100 A according to the first embodiment of the invention, and  FIG. 2  is a cross-sectional view illustrating the decorative substrate  100 A depicted in  FIG. 1  along line I-I′. 
     Referring to  FIG. 1  and  FIG. 2  together, the decorative substrate  100 A has a first region  120  and a second region  130 , and the second region  130  surrounds the first region  120 . However, the invention is not limited thereto. In other embodiments, the second region  130  can also at least partially surround the first region  120 . The decorative substrate  100 A includes a substrate  110 , a decorative layer  140  and a protective layer  150 . 
     The substrate  110  has a first surface  110   a  and a first sidewall  110   b . Electrodes, wires or other devices can be selectively formed on the substrate  110 , but the invention is not limited to said elements. A material of the substrate  110  includes, for example, glass, quartz, an organic polymer (polymeric compound material) or metal, etc. 
     In view of  FIG. 1 , the first region  120  being substantially disposed in a center of the substrate  100 A can be deemed as a center region, whereas the second region  130  surrounding the first region  120  can be deemed as a peripheral region. The decorative layer  140  is disposed on the first surface  110   a  and in the second region  130 . In the present embodiment, the decorative layer  140  is substantially surrounding the first region  120  without extending in the first region  120 . Therefore, the first region  120  can practically be deemed as a region on the substrate  110  which is not disposed with the decorative layer  140  but surrounded by the decorative layer  140 . Of course, the invention is not limited thereto. In other embodiments, the decorative layer  140  can merely be disposed on a side of the first region  120  or partially surrounding at periphery of the first region  120 . 
     In view of both  FIG. 1  and  FIG. 2 , the decorative layer  140  has a second sidewall  140   b , and the second sidewall  140   b  is adjacent to the first sidewall  110   b  of the substrate  110 . Further, a portion of the first surface  110   a  disposed between the second sidewall  140   b  and the first sidewall  110   b  is defined as an outer border region  112 . In the present embodiment, the outer border region  112  is exposed by the decorative layer  140 , for example. In an embodiment of the invention, the decorative substrate  100 A disposed with a touch device can serve as a touch panel, and the decorative layer  140  is made of, for example, an ink, a photoresistor, a ceramic, a diamond-like or other materials. Particularly, the decorative layer  140  can be a material layer of black, white, or other colors. However, the invention is not limited thereto. In other embodiments, the decorative substrate  100 A can also be applied in other devices excluding the touch panel, such as a display panel, and the decorative layer  140  can also be other appropriate decorative materials. 
     The protective layer  150  is disposed in the second region  130 , and the protective layer  150  covers the decorative layer  140  and is partially disposed in the outer border region  112  of the first surface  110   a . More specifically, the protective layer  150  covers an upper surface  140   a  of the decorative layer  140 , extends from the upper surface  140   a  of the decorative layer  140  to cover the second sidewall  140   b , and further extends to a part of the outer border region  112  of the first surface  110   a . Further, the protective layer  150  has a third sidewall  150   b . The third sidewall  150   b  is adjacent to the first sidewall  110   b  of the substrate  110 , and a distance D1 between the third sidewall  150   b  and the first sidewall  110   b  is less than 500 μm. In other words, the protective layer  150  partially covers the outer border region  112 , however, it can also be selected to completely cover the outer border region  112 . 
     Generally, in order to improve a mechanical strength of the decorative substrate  100 A and extend an operating life thereof, a subsequent strengthening process is further required after the decorative substrate  100 A is manufactured. A common strengthening process utilizes an acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on) to etch the first sidewall  110   b , so that cracks on the first sidewall  110   b  can become smooth, or a roughness of the first sidewall  110   b  can be further reduced. In other words, the first sidewall  110   b  can have an etched surface. Nevertheless, in said strengthening process, when the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on) permeates from the first sidewall  110   b  toward a center of the substrate  110  (particularly, when an overly side etching occurs), problems of poor appearance such as white borders, black borders or white spots may appear in the outer border region  112 . In case the decorative substrate  100 A is applied in the touch panel, it is required that a width (which is extended inwardly from the first sidewall  110   b ) of the white borders, the black borders or the white spots at the borders does not exceed 500 μm. 
     In the present embodiment, the decorative substrate  100 A has the protective layer  150  which covers the decorative layer  140  and extends in a part of the outer border region  112 . In addition, a material of the protective layer  150  is, for example, an insulating material. The insulating material includes silicon nitride. The insulating material can also be an acid-resistant material, an organic material or an inorganic material or other appropriate materials. The material of the protective layer  150  can be the insulating material of transparent or non-transparent characteristic, which is not particularly limited in the invention. Accordingly, the edges of the substrate  110  can be protected from the corrosion by the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on), such that the problems of poor appearance such as the white borders, the black borders or the white spots at the border caused by the side etching can be effectively solved. For instance, the problem of the white border can be solved by disposing and designing of the protective layer  150  of the invention. Particularly, the width of the white border extended inwardly from the first sidewall  110   b  can be less than 500 μm, so as to meet the existing standard specification. 
     It should be noted that, in an embodiment of the invention, if at least one insulating layer (not illustrated) is disposed in the first region  120 , the protective layer  150  can be formed in the same layer with one of the insulating layers in the first region  120 . In other words, the protective layer  150  can be formed by extending one of the insulating layers in the first region  120  to the outer border region  112  and covering the decorative layer  140 . Accordingly, a number of utilizing photomask can be prevented from increasing during manufacturing process of the decorative substrate  100 A, so as to reduce the costs. In other words, the protective layer  150  can be manufactured by a material layer predetermined to be formed in the first region  120 . However, the invention is not limited thereto. In other embodiments, the first region  120  can also be provided without the insulating layer, and the protective layer  150  can also be, for example, an insulating layer exclusively disposed in the second region  130 . 
     In the embodiment of  FIG. 2 , one single protective layer  150  covers the decorative layer  140  and continue to extend in a part of the outer border region  112 , and the distance D1 between the third sidewall  150   b  and the first sidewall  110   b  of the substrate  110  is less than 500 μm. However, the invention is not limited thereto. In other embodiments (e.g., second embodiment and third embodiment) of the invention, the protective layer can also include a first portion and a second portion which are separated from each other. 
       FIG. 3  is a cross-sectional view of an outer border region  112  of a decorative substrate  100 B according to the second embodiment of the invention. The embodiment of  FIG. 3  is similar to the embodiment of  FIG. 2 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. A major difference between the embodiment of  FIG. 3  and the embodiment of  FIG. 2  lies in that, a protective layer  250  of the decorative substrate  100 B can include a first portion  252  and a second portion  254  which are separated from each other, and detailed description are described as follows. 
     The first portion  252  covers the decorative layer  140 , and the first portion  252  further extends from the decorative layer  140  to the outer border region  112 . The first portion  252  has a fourth sidewall  252   b . Further, a distance D3 is provided between the fourth sidewall  252   b  of the first portion  252  and the second sidewall  140   b  of the decorative layer  140 . 
     The second portion  254  is disposed in the outer border region  112  of the first surface  110   a . In the present embodiment, the second portion  254  is separated from the first portion  252 . More specifically, the second portion  254  is disposed between the first sidewall  110   b  of the substrate  110  and the fourth sidewall  252   b  of the first portion  252 . The second portion  254  has a fifth sidewall  254   b  adjacent to the first sidewall  110   b , and a distance D2 between the fifth sidewall  254   b  of the second portion  254  and the first sidewall  110   b  of the substrate  110  is less than 500 μm. In an embodiment, a width W of the second portion  254  is, for example, greater than 10 μm, and more preferably greater than 50 μm. 
     It should be noted that, the material, the distances D1 to D3 and the width W of the protective layer  250  can be properly selected based on design requirements of the decorative substrate  100 B, as long as the protective layer  250  can block the side etching of the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on) during the subsequent strengthening process for the substrate, so as solve the problems of poor appearance or damages to the substrate  110  and the devices. 
       FIG. 4  is a cross-sectional view of an outer border region  112  of a decorative substrate  100 C according to the third embodiment of the invention. The embodiment of  FIG. 4  is similar to the embodiment of  FIG. 3 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. A major difference between the embodiment of  FIG. 4  and the embodiment of  FIG. 3  lies in that, a protective layer  250 ′ of the decorative substrate  100 C can include a first portion  252  and a plurality of second portions  254 ′, and detailed description are described as follows. 
     The plurality of second portions  254 ′ are disposed in the outer border region  112  of the first surface  110   a , and the second portions  254 ′ are separated from the first portion  252 . More specifically, the plurality of second portions  254 ′ are disposed between the first sidewall  110   b  of the substrate  110  and the fourth sidewall  252   b  of the first portion  252 . One of the second portions  254 ′ adjacent to the first sidewall  110   b  has a fifth sidewall  254   b ′ which is closest to the first sidewall  110   b , and a distance D2′ between the fifth sidewall  254   b ′ and the first sidewall  110   b  of the substrate  110  is less than 500 μm. More specifically, the fifth sidewall  254   b ′ is a sidewall of the second portion  254 ′ which is adjacent to the first sidewall  110   b  of the substrate  110 . In an embodiment, widths W′ of the second portions  254 ′ are, for example, greater than 10 μm, and more preferably greater than 50 μm. The widths W′ of the second portion  254 ′ can be identical, or different from each other. For instance, the second portion  254 ′ can include at least two different widths W′. Additionally, in this embodiment it is possible to configure one second portion  254 ′ at a position (such as shown in  FIG. 3 ) in the outer boarder region  112  and configure plural second portions  254 ′ at another position (such as shown in  FIG. 4 ) in the outer boarder region  112  according to the design of the decorative substrate  100 C. 
       FIG. 5  is a cross-sectional view of an outer border region  112  of a decorative substrate  100 D according to the fourth embodiment of the invention. The embodiment of  FIG. 5  is similar to the embodiment of  FIG. 4 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. A major difference between the embodiment of  FIG. 5  and the embodiment of  FIG. 4  lies in that, a protective layer  250 ″ of the decorative substrate  100 D can include a first portion  252  and a plurality of second portions  254 ″, and a material of the second portions  254 ″ is identical to a material of the decorative layer  140 , and detailed description are described as follows. 
     The plurality of second portions  254 ″ are disposed in the outer border region  112  of the first surface  110   a , and the second portions  254 ″ are separated from the first portion  252 . More specifically, the plurality of second portions  254 ″ is disposed between the first sidewall  110   b  of the substrate  110  and the fourth sidewall  252   b  of the first portion  252 . One of the second portions  254 ″ adjacent to the first sidewall  110   b  has a fifth sidewall  254   b ″ which is closest to the first sidewall  110   b , and a distance D2″ between the fifth sidewall  254   b  and the first sidewall  110   b  of the substrate  110  is less than 500 More specifically, the fifth sidewall  254   b ″ is a sidewall of one second portion  254 ″ which is adjacent to the first sidewall  110   b  of the substrate  110 . In an embodiment, widths W″ of the second portions  254 ″ are, for example, greater than 10 μm, and more preferably greater than 50 μm. The widths W″ of the second portion  254 ″ can be identical to, or different from each other. For instance, the second portion  254 ″ can include at least two different widths W″. It should be mentioned that, in the present embodiment, the second portions  254 ″ are, for example, formed by the same manufacturing process of the decorative layer  140  such that the second portions  254 ″ and the decorative layer  140  are in the same layer. However, the invention is not limited thereto. In other embodiments, the second portion  254 ″ can also be a layer additionally formed. Further, in the present embodiment, the second portion  254 ″ having the same material of the decorative layer  140  is served as the protective layer, thus the widths W″ of the second portion  254 ″ can be smaller than the widths W′ of the second portion  254 ′. In other words, in case the protective layer uses the same material of the decorative layer, the widths of the protective layer can be manufactured to be narrower, so as to save materials and costs. 
       FIG. 6  is a cross-sectional view of an outer border region  112  of a decorative substrate  100 E according to fifth embodiment of the invention. The embodiment of  FIG. 6  is similar to the embodiments of  FIG. 4  and  FIG. 5 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. A major difference between the embodiment of  FIG. 6  and the embodiments of  FIG. 4  and  FIG. 5  lies in that, a protective layer  250 ′″ can include a first portion  252 , a plurality of second portions  254 ′ and a plurality of second portions  254 ″. In the present embodiment, it is illustrated with each of the second portions  254 ′ covering corresponding one of the second portions  254 ″ as an example, but the invention is not limited thereto. In other embodiments, the second portions  254 ′ can partially cover the second portions  254 ″; or the second portions  254 ′ do not cover the second portions  254 ″; or there can also be other appropriate configurations. 
     In the foregoing embodiments of  FIG. 2  through  FIG. 6 , it is illustrated with the protective layer covering the decorative layer and extending in a part of the outer border region as an example. However, the invention is not limited thereto. In other embodiments (e.g., sixth embodiment) of the invention, the decorative substrate can also include other layers such as an etching-resistant film and an adhesive layer, etc. 
       FIG. 7  is a cross-sectional view of an outer border region  112  of a decorative substrate  100 F according to the sixth embodiment of the invention. The embodiment of  FIG. 7  is similar to the embodiment of  FIG. 2 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. A major difference between the embodiment of  FIG. 7  and the embodiment of  FIG. 2  lies in that, the decorative substrate  100 F can further include a first etching-resistant film  162 , a second etching-resistant film  164 , a first adhesive layer  172  and a second adhesive layer  174 , and detailed description are described as follows. 
     The first etching-resistant film  162  covers the first surface  110   a  of the substrate  110 , and the second etching-resistant film  164  covers a second surface  110   c  of the substrate  110  on an opposite side of the first surface  110   a . A material of the first etching-resistant film  162  and the second etching-resistant film  164  includes, for example, polyimide (PI), resin or other appropriate materials. 
     Further, the first adhesive layer  172  is disposed between the first etching-resistant film  162  and the first surface  110   a  of the substrate  110 , and the second adhesive layer  174  is disposed between the second etching-resistant film  164  and the second surface  110   c  of the substrate  110 . A material of the first adhesive layer  172  and the second adhesive layer  174  includes, for example, an acrylic adhesive or other appropriate materials. The first etching-resistant film  162  and the second etching-resistant film  164  can facilitate in preventing the first surface  110   a , the second surface  110   c  or other devices disposed on said surfaces from corrosion by the acid solution during the strengthening process. In addition, the first etching-resistant film  162 , the second etching-resistant film  164 , the first adhesive layer  172  and the second adhesive layer  174  can also be applied in any one among the decorative substrates  100 A to  100 E. In other words, the components in each of the decorative substrates  100 A to  100 E can be sandwiched between the first etching-resistant film  162  and the second etching-resistant film  164 , so as to prevent damages to the decorative layer  140 , the first surface  110   a  or other components during the strengthening process. 
     Hereinafter, it is further described by using configuration and design of the protective layer of the invention applied in various touch panels as examples, but the invention is not limited by the following embodiments (e.g., seventh embodiment through tenth embodiment). 
       FIG. 8  is a schematic top view of a touch panel  300  according to the seventh embodiment of the invention. The embodiment of  FIG. 8  is similar to the embodiments of  FIG. 1  and  FIG. 2 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. 
     Referring  FIG. 8 , the touch panel  300  includes all components of the decorative substrate  100 A and a conductive structure  380 . The conductive structure  380  is disposed on the first surface  110   a  of the substrate  110 , and including a first region conductive unit  382  disposed in the first region  120  and a second region conductive unit  384  disposed in the second region  130 . Herein, position and related description of the first surface  110   a  can refer to  FIG. 2 . In addition, the conductive structure  380  of the present embodiment can also be selectively disposed on one of the decorative substrates  100 A to  100 E recited in the foregoing embodiments, so as to compose a touch panel. 
     The first region conductive unit  382  includes a plurality of first electrodes  382   a  and a plurality of second electrodes  382   b . The first electrodes  382   a  are physically separated from each other and electrically insulated to each other; the second electrodes  382   b  are physically separated from each other and electrically insulated to each other; and the second electrodes  382   b  are physically separated and electrically insulated to the first electrodes  382   a . In the present embodiment, the first electrodes  382   a  and the second electrodes  382   b  are respectively composed of a serial structure, and extended along different directions. Hence, the first electrodes  382   a  and the second electrodes  382   b  are disposed in an intersecting manner. In order to realize such structure, the first region conductive unit  382  can be composed of a multiple (at least two layers) conductive layer, the multiple conductive layers are separated by an insulating member  390 . In other words, the insulating member  390  is disposed between the first electrodes  382   a  and the second electrodes  382   b , and more particularly, the insulating member  390  is disposed at an intersection between the first electrodes  382   a  and the second electrodes  382   b  to electrically insulate the first electrodes  382   a  and the second electrodes  382   b , such that a capacitive touch signal therein can be generated during touch operations. A material of the insulating member  390  is, for example, an insulating material. The insulating material includes silicon nitride, an acid-resistant material, an organic material or an inorganic material or other appropriate materials. 
     In the present embodiment, the protective layer  150  and the insulating member  390  can be formed in the same layer, and manufactured with the same material in the same manufacturing process. However, the invention is not limited thereto. In other embodiment, the touch panel  300  can further include a cover layer (not illustrated) at least covering a portion of the conductive structure  380  and at least being disposed in the first region  120 , and the protective layer  150  can selectively be formed in the same layer with the cover layer (not illustrated) or other insulating layers. Therein, a material of the cover layer is, for example, an insulating material. The insulating material includes silicon nitride, an acid-resistant material, an organic material or an inorganic material or other appropriate materials. Furthermore, the cover layer and its configuration can be utilized in any of the following embodiments. 
     The second region conductive unit  384  includes a plurality transmitting lines  384   a . Each of the transmitting lines  384   a  is connected to the first region conductive unit  380 , and more particularly, each of the transmitting lines  384   a  is connected to one corresponding first electrode  382   a  or one corresponding second electrode  382   b . However, the invention is not limited thereto. In other embodiments, the second region conductive unit  384  can also include other wires or conductive electrodes (e.g., a bonding pad, a self capacitance electrode or electrodes for hovering touch). 
     In the embodiment of  FIG. 8 , the first region conductive unit  382  is composed of the multi-layers conductive layer. However, the invention is not limited thereto. In other embodiments (e.g., eighth embodiment through tenth embodiment), the first region conductive unit can also be composed of a single-layer conductive layer. 
       FIG. 9  through  FIG. 11  are schematic top views of touch panels  400 ,  500  and  600  according to the eighth embodiment through the tenth embodiment of the invention. The embodiments of  FIG. 9  through  FIG. 11  are similar to the embodiment of  FIG. 8 , thus identical or similar elements are indicated by identical or similar reference numbers, and the descriptions thereof are not repeated. 
     Referring  FIG. 9 , the touch panel  400  includes all components of the decorative substrate  100 A and further includes a conductive structure  480 . The conductive structure  480  is disposed on the first surface  110   a , and including a first region conductive unit  482  disposed in the first region  120  and a second region conductive unit  484  disposed in the second region  130 . The first region conductive unit  482  includes a plurality of first electrodes  482   a  and a plurality of second electrodes  482   b . The first electrodes  482   a  are physically separated from each other and electrically insulated to each other; the second electrodes  482   b  are physically separated from each other and electrically insulated to each other; and the second electrodes  482   b  are physically separated and electrically insulated to the first electrodes  482   a . Herein, positions and related descriptions of the first surface  110   a , the first region  120 , the second region  130 , the decorative layer  140  and the protective layer  150  can refer to  FIG. 1  and  FIG. 2 . In addition, the conductive structure  480  of the present embodiment can also be selectively disposed on one of the decorative substrates  100 A and  100 E recited in the foregoing embodiments. 
     In the present embodiment, the first region conductive unit  480  can be composed of the single-layer conductive layer, and the first electrode  482   a  and the electrode  482   b  are electrically insulated, such that a capacitive touch signal can be generated therein during touch operations. Furthermore, the second region conductive unit  484  includes a plurality transmitting lines  484   a . Each of the transmitting lines  484   a  is connected to the first region conductive unit  480 , and more particularly, each of the transmitting lines  484   a  is connected to one corresponding first electrode  482   a  or one corresponding second electrode  482   b . In addition, shapes of the first electrode  482   a  and the second electrode  482   b  are triangles, and widths of the shapes are changed in opposite tendencies. 
     Referring  FIG. 10 , the touch panel  500  includes all components of the decorative substrate  100 A and a conductive structure  580 . The conductive structure  580  is disposed on the first surface  110   a , and including a first region conductive unit  582  disposed in the first region  120  and a second region conductive unit  584  disposed in the second region  130 . Herein, position and related description of the first surface  110   a  can refer to  FIG. 2 . In addition, the conductive structure  580  of the present embodiment can also be selectively disposed on one of the decorative substrates  100 A and  100 E recited in the foregoing embodiments. The first region conductive unit  582  includes a plurality of first electrodes  582   a  and a plurality of second electrodes  582   b . The first electrodes  582   a  are physically separated from each other and electrically insulated to each other; the second electrodes  582   b  are physically separated from each other and electrically insulated to each other; and the second electrodes  582   b  are physically separated and electrically insulated to the first electrodes  582   a . In the present embodiment, the first region conductive unit  580  can be composed of the single-layer conductive layer, and the first electrode  582   a  and the electrode  582   b  are electrically insulated, such that a capacitive touch signal can be generated therein during touch operations. Herein, each of the first electrodes  582   a  and the plurality of second electrodes  582   b  can compose a group for touch sensing. Furthermore, the second region conductive unit  584  includes a plurality transmitting lines  584   a , and each of the transmitting lines  584   a  is connected to one corresponding first electrode  582   a  or one corresponding second electrode  582   b  in the first region conductive unit  580 . 
     Referring  FIG. 11 , the touch panel  600  includes all components of the decorative substrate  100  and a conductive structure  680 . The conductive structure  680  is disposed on the first surface  110   a , and including a first region conductive unit  682  disposed in the first region  120  and a second region conductive unit  684  disposed in the second region  130 . Herein, position and related description of the first surface  110   a  can refer to  FIG. 2 . In addition, the conductive structure  680  of the present embodiment can also be selectively disposed on one of the decorative substrates  100 A and  100 E recited in the foregoing embodiments. 
     The first region conductive unit  682  includes a plurality of electrodes  682   a . The electrodes  682   a  are physically separated from each other and electrically insulated each other. In the present embodiment, the first region conductive unit  680  can be composed of the single-layer conductive layer, and the electrodes  682   a  are electrically insulated to each other, such that a capacitive touch signal can be generated during touch operations. Furthermore, the second region conductive unit  684  includes a plurality transmitting lines  684   a , and each of the transmitting lines  684   a  is connected to the first region conductive unit  680 . In other words, each of the transmitting lines  684   a  are connected to one corresponding electrode  682   a.    
     In summary, in the decorative substrate and the touch panel of the invention, the protective layer is disposed in the second region, and the protective layer is at least disposed in the outer border region adjacent to the first sidewall of the first surface. Because the decorative substrate and the touch panel of the invention is provided with the protective layer, the side etching of the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on) during the subsequent strengthening process for the substrate can be blocked. Accordingly, devices around the edges of the substrate can be protected from corrosion by the acid solution (e.g., hydrofluoric acid, hydrochloric acid and so on), such that the problems of poor appearance such as the white borders, the black borders or the white spots at the borders caused by the side etching can be effectively solved. Moreover, performance of the devices can also be improved. 
     Implementation regarding disposition on surfaces of the substrate in all the foregoing embodiment is not limited to a manner of directly contacting the surfaces of the substrate. 
     It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the present disclosure without departing from the scope or spirit of the disclosure. In view of the foregoing, it is intended that the present disclosure cover modifications and variations of this disclosure provided they fall within the scope of the following claims and their equivalents.