CN103246401A - Sensing element structure of touch panel and manufacturing method thereof - Google Patents

Abstract

The invention discloses a sensing element structure of a touch panel and a manufacturing method thereof. The sensing element structure of the touch panel includes a plurality of first sensing series, which are respectively arranged on the surface of a first substrate along the first direction. Each first sensing series includes a plurality of first sensing units and a plurality of first trenches, wherein the plurality of first sensing units are adjacent and side by side along the first direction, and each includes a first relief. structure and a first conductive material disposed in the accommodation space of the first relief structure, and each first trench is disposed between any two adjacent first sensing units in the same sensing series, so that The accommodation spaces of any two adjacent first relief structures are connected through the first trench, and the first conductive material is also disposed in the first trench, so that the first sensing units of the same first sensing series They are electrically connected to each other through the first conductive material in the first trench.

Description

Sensing element structure and manufacturing method of touch panel

technical field

The present invention relates to a sensing element structure of a touch panel and a manufacturing method thereof, in particular to a sensing element structure of a touch panel using an embossment structure and a transparent conductive material as a sensing unit and its production method.

Background technique

Among various types of consumer electronic products today, portable electronic products such as tablet computers, mobile phones, and audio-visual players have widely used touch panels to replace traditional keyboards as human-machine data communication. interface to save the volume of electronic products.

Existing touch panels mainly use transparent metal oxide materials to make sensing elements, among which materials such as indium tin oxide are most commonly used at present. However, the transmittance, sheet resistance and hue of transparent metal oxide materials are all affected by the thickness of the film layer. For example, if the film layer is increased to reduce the sheet resistance If the thickness is low, the transmittance of ITO will be reduced. Therefore, it is difficult to balance the transparency and electrical performance of the touch panel when using traditional transparent metal oxide materials as sensing elements. In addition, indium tin oxide is a brittle material, and if it is applied in a soft touch panel, it will easily crack and cause touch failure. Therefore, the current practice of using transparent metal oxide materials to manufacture sensing elements still needs further improvement.

Contents of the invention

One of the objectives of the present invention is to provide a sensing element structure made of embossed structure and transparent conductive material, so that its application in a touch panel can effectively improve the above-mentioned existing problems caused by sensing element materials. Control panel transparency and electrical performance issues.

To achieve the above purpose, the present invention provides a sensing element structure of a touch panel, the sensing element structure includes a plurality of first sensing series, respectively disposed on the first surface of the first substrate along a first direction. Each first sensing series includes a plurality of first sensing units and a plurality of first trenches, wherein the plurality of first sensing units are adjacent to each other along the first direction, and each first sensing unit includes The first embossed structure and a first conductive material are accommodated in the accommodating space of the first embossed structure. Each first groove is respectively arranged between any two adjacent first sensing units of the same first sensing series, so that the accommodating space of any two adjacent first relief structures passes through each first groove The grooves are connected. Moreover, the first conductive material is further disposed in the first groove, so that the first sensing units of the same first sensing series are electrically connected to each other.

In order to achieve the above purpose, the present invention further provides a method for manufacturing a sensing element structure of a touch panel, which includes providing a first substrate having a first surface opposite to it, and then forming a plurality of first embossments on the first surface structure and a plurality of first grooves, wherein the first embossed structures are arranged in an array and have an accommodating space, and each first groove is arranged between the first embossed structures arranged adjacently along the first direction, to communicate with the plurality of first embossed structures. Then fill the accommodating space of the first embossed structure and the first groove with the first conductive material. A sealing layer is then formed on the surface of the first embossed structure to seal the first conductive material in the accommodating space and the first groove.

Since the present invention uses the embossed structure and conductive material to make the sensing element structure of the touch panel, it can take into account both transparency and electrical performance, and both the embossed structure and the conductive material can adapt to bending or soft environments, so the present invention The sensing element structure can be applied to soft touch panels, which can greatly improve the problem of brittle cracking of sensing elements caused by the brittleness of traditional metal oxide materials.

Description of drawings

1 is a schematic top view of a first embodiment of a sensing element structure of a touch panel of the present invention;

2 is a schematic cross-sectional view of the sensing element structure of the touch panel shown in FIG. 1 along the tangent line 2-2';

3 is a schematic diagram of the manufacturing process of the sensing element structure of the present invention;

4 is a schematic top view of a second embodiment of a sensing element structure including a touch panel of the present invention;

5 is a schematic cross-sectional view of the sensing element structure of the touch panel shown in FIG. 4 along the tangent line 5-5';

6 is a schematic top view of a third embodiment of a sensing element structure including a touch panel of the present invention;

7A is a schematic cross-sectional view of the sensing element structure of the touch panel shown in FIG. 6 along the tangent line 7-7';

7B is a schematic cross-sectional view of a first variant embodiment of the sensing element structure shown in FIG. 7A;

7C is a schematic cross-sectional view of a second variant embodiment of the sensing element structure shown in FIG. 7A;

7D is a schematic cross-sectional view of a third variant embodiment of the sensing element structure shown in FIG. 7A;

8 is a schematic top view of a fourth embodiment of a sensing element structure including a touch panel of the present invention;

9 is a schematic cross-sectional view of the sensing element structure of the touch panel shown in FIG. 8 along the tangent line 9-9';

10 is a schematic top view of a fifth embodiment of the sensing element structure including the touch panel of the present invention;

11 is a schematic cross-sectional view of the sensing element structure of the touch panel shown in FIG. 10 along the tangent line 11-11';

FIG. 12 is a schematic diagram of a variant embodiment of the sensing unit pattern of the present invention.

Symbol Description

100 sensing element structure basic unit 110 sensing element structure

112, 112’, 112’’, 112’’’ The first substrate

112a, 112a', 112a'', 112a''' the first surface of the first substrate

112b, 112b' the second surface of the first substrate

114 The first sensing unit 116 The first embossed structure

116a accommodation space 118 first conductive material

120 embossed material layer 120a raised part

120b flat part 122 first groove

124 first sealing layer 126 cavity

128, 128a, 128b, 128c The first sensing series

130 first wire structure 130a wide wire part

130b thin wire part 132 crimping roller

136 Adhesive layer 138 Protective layer

140, 218 second conductive material 142 signal sensing area

144 peripheral line area 200 basic unit of sensing element structure

212 second substrate 212a the first surface of the second substrate

214 The second sensing unit 216 The second embossed structure

216a accommodation space 220 embossed material layer

222 Second groove 224 Second sealing layer

226 pockets

228, 228a, 228b, 228c Second sensing series

230 Second wire structure 240 Conductive bridging element

242 through holes

600, 700, 800, 900 Sensing element structure/touch panel

610 Signal Sensing Area 612 Peripheral Line Area

H embossed structure depth Y first direction

X second direction

Detailed ways

Please refer to FIG. 1 and FIG. 2, wherein FIG. 1 is a schematic top view of a first embodiment of the sensing element structure of the touch panel of the present invention, and FIG. 2 is a schematic view of the sensing element structure of the touch panel shown in FIG. 1 along the tangent line 2-2' Schematic cross-section. In FIG. 1 and FIG. 2, the sensing element structure 110 has a first sensing series 128 in a single direction, for example, includes a plurality of first sensing series 128a, 128b, 128c, all extending along the first direction Y. . Each of the first sensing series 128 includes a plurality of first sensing units 114, which are adjacent and arranged in a straight line along the first direction Y, and are arranged on the first surface 112a of the first substrate 112, and each first The sensing unit 114 respectively includes a first embossed structure 116 and a first conductive material 118 . Each first embossed structure 116 includes an accommodating space 116 a, and the first conductive material 118 is accommodated in the accommodating space 116 a of the first embossed structure 116 . The first sensing series 128 further includes a plurality of first grooves 122, respectively disposed between any two adjacent first sensing units 114 of the same first sensing series 128, so that any two adjacent first sensing units 114 The accommodating space 116a of a relief structure 116 can communicate with each other through the first grooves 122 ; The first conductive material 118 is further disposed in the first trench 122, therefore, the first conductive material 118 and the first trench 122 in each first sensing unit 114 in the same first sensing series 128 The first conductive materials 118 are in fluid communication, and are electrically connected or electrically connected to each other. It is worth noting that in FIG. 1, although only three first sensing series 128a, 128b, 128c and three sensing units 114 are used as a representative illustration, in fact the first sensing element structure 110 The number of sensing series 128 and the number of first sensing units 114 and first grooves 122 included in each first sensing series 128 are not limited to those shown in FIG. 1 .

It can be seen from FIG. 2 that the first embossed structure 116 is composed of an embossed material layer 120, wherein the embossed material layer 120 is disposed on the first surface 112a of the first substrate 112, and has a flat portion 120b and a raised portion 120a. , the adjacent raised portion 120a will surround the flat portion 120b of the portion like a cup wall, forming an accommodating space 116a, and the accommodating space 116a has an opening only at the junction with the first groove 122, so that the The inner first conductive material 118 can flow through the adjacent first relief structure 116 through the first trench 122 . In addition, the sensing element structure 110 further includes a first sealing layer 124 disposed on the surface of the relief material layer 120, which covers the surfaces of the first relief structures 116 and the first grooves 122, and connects the accommodating space 116a to the first groove. The first conductive material 118 in the trench 122 is sealed in each first sensing series 128 . In this embodiment, the first conductive material 118 may include any combination of transparent conductive materials, such as conductive nano-silver wire (silvernanowire), nano-metal particles (nano metal particles) or nano-graphite material. Solution, etc., the combination of the above-mentioned conductive nano-materials and solvents in a certain ratio or condition, the first conductive material 118 will be considered transparent or highly transparent through human vision. The entire first conductive material 118 located in the first sensing series 128 can be made conductive by the nano-silver wire, nano-metal particle or nano-graphite dispersed in the first conductive material 118, so that the first sensing series The first sensing units 114 in the column 128 are electrically connected to each other. For example, the depth H of the accommodating space 116a of the first embossed structure 116 in this embodiment is about 15 to 30 microns, but not limited thereto; the first conductive material 118 in each first embossed structure 116 The accommodating space 116a may or may not be completely filled, for example, the filling height of the first conductive material 118 in the accommodating space 116a may be less than or equal to about 1 micron, but not limited thereto.

The sensing element structure 110 of the touch panel of the present invention may further include a plurality of first wire structures 130, which are respectively located at one end or both ends of each first sensing series 128. For example, each first wire structure is shown in FIG. 1 The structures 130 respectively correspond to one of the first sensing series 128, and are arranged on the lower side or the upper side of the first sensing series 128, that is, the upper side and the lower side of a first sensing series 128 are respectively connected. A first wire structure 30 , wherein the first wire structure 130 is in contact with the first conductive material 118 of the corresponding first sensing series 128 to be electrically connected to the first sensing series 128 . In other embodiments, only one side of a first sensing series 128 may be connected to a first wire structure 30 . The first wire structure 130 preferably includes a metal material or a combination of conductive materials with transparent properties, such as silver, which can be fabricated on the first surface 112a of the first substrate 112 by screen printing, but not limited thereto, for example, The first conducting wire structure 130 can be manufactured by using yellow light manufacturing process or ink-jet printing (Ink-jet printing) technology. In order to make the first wire structure 130 contact with the first conductive material 118 of the corresponding first sensing series 128, the thickness of the first wire structure 130 is preferably greater than the height of the first relief structure 116, for example, it may be equal to or greater than the sum of the height of the first relief structure 116 and the thickness of the first sealing layer 124 . Moreover, at the junction with the first sensing series 128, the first conductive line structure 130 may have a wide conductive line portion 130a, the width of which is about the same as the width of the accommodating space 116a, and the wide conductive line portion 130a is connected with the embossed material layer. The raised portion 120a of 120 meets and surrounds the first conductive material 118 . Each first wire structure 130 further includes a thin wire part 130b, respectively connected to the corresponding wide wire part 130a, and the thin wire part 130b can be electrically connected with other external wires or signal reading elements to connect the first The signal sensed by the sensing unit 114 is transmitted out. Therefore, in the sensing element structure 110 of the present invention, the part provided with the first sensing series 128 can be regarded as the signal sensing region 142, which is approximately the same as the region covered by the first sealing layer 124, while the first substrate The area of 112 not covered by the first sealing layer 124 can be regarded as the peripheral circuit area 144 , that is, the area where the first conducting wire structure 130 is disposed. The number and shape of the first wire structures 130 corresponding to each first sensing series 128 are not limited to this embodiment. For example, in other embodiments, one first sensing series 128 can correspond to two second A wire structure 130 is respectively located at two ends of the first sensing series 128 .

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of the manufacturing process of the sensing element structure of the present invention in a roll-to-roll manner. The sensing element structure 110 of the present invention can be manufactured in a roll-to-roll manner. First, as in step 502, the first substrate 112 is provided, and then the embossed material layer 120 is formed on the first surface 112a of the first substrate 112 by, for example, coating or other methods, and then processed by embossing in the manufacturing process step 504 The first embossed structure 116 and the first groove 122 (not shown in FIG. 3 ) arranged in an array are embossed on the surface of the embossed material layer 120 by using the embossed roller 132, and then as shown in the manufacturing process step 506 Filling the first conductive material 118 in the first relief structure 116 of the first sensing unit 114 on the first substrate 112 and the first groove 122 between any two adjacent first sensing units 114, so as to A first sensing series 128 is formed. Then, as in step 508, the first embossed structure 116 filled with the first conductive material 118 and the first groove 122 are sealed with the first sealing layer 124, and the sensing element structure 110 of the touch substrate of the present invention is completed. The production of basic components. It should be noted that when the first conductive material 118 is filled, the first conductive material 118 may be in a fluid state because it contains a solvent, and the first conductive material 118 can be baked before or after sealing to evaporate or solidify the solvent , such as heating or irradiating the first conductive material 118 with ultraviolet light, so that the first conductive material 118 is cured. In different embodiments, the first conductive material 118 itself can also be a transparent fluid. After filling the first embossed structure 116, it is not evaporated or solidified, so that the first conductive material 118 exists in the embossed structure in a fluid state. Inside Structure 116. Afterwards, according to the required size of the touch panel, the entire first substrate 112 may be cut into multiple pieces by cutting or the like to form multiple sensing element structures 110 . In addition, the first wire structure 130 can be formed on the surface of the first substrate 112 before or after cutting the first substrate 112 to connect with the corresponding first sensing series 128 .

Please refer to FIG. 1 and FIG. 2 at the same time. In the manufacturing process step 504, when the first embossed structure 116 and the first groove 122 are embossed on the surface of the embossed material layer 120 by using the embossing roller 132, the A plurality of closed cavities 126 are formed on the first substrate 112 between adjacent first sensing series 128, which are composed of closed convex portions 120a and flat portions 120b. In this embodiment, the cavities 126 There is no need to fill in other materials, but in the sealing manufacturing process of the manufacturing process step 508 , the first sealing layer 124 will seal the cavity 126 at the same time. It should be noted that the design of the sensing element structure 110 of the present invention between the first sensing series 128 is not limited to the above, for example, in another embodiment, the cavity 126 can also be injected with conductive Materials, for example, the second conductive material 140 is injected into the cavity 126 in the manufacturing process step 506 , wherein the first conductive material 118 and the second conductive material 140 may be the same or different materials. Then in the manufacturing process step 508 , the first conductive material 118 and the second conductive material 140 of the cavity 126 and the accommodating space 116 a are simultaneously sealed. In yet another embodiment, transparent and non-conductive fluid or other materials may be injected into the cavity 126 and then sealed, so as to balance the pressure on both sides of the protruding portion 120a. In yet another embodiment, embossing rollers 132 with embossing patterns different from those of the first embodiment may be used to emboss embossed material layer 120 with only the first embossed structure 116 and the first groove 122. But there is no pattern of recesses 126 , that is, the embossed material layer 120 between adjacent first sensing series 128 is all protruding portions 120 a.

The sensing element structure of the touch panel of the present invention is not limited to the above-mentioned embodiments. The structure of the sensing element of the touch panel and its manufacturing method in other preferred embodiments of the present invention will be introduced in sequence below, and in order to facilitate the comparison of the differences between the various embodiments and simplify the description, the following embodiments use The same symbols denote the same components, and the description will mainly focus on the differences of the embodiments, and the repeated parts will not be repeated.

Please refer to FIG. 4 and FIG. 5, FIG. 4 is a schematic top view of a second embodiment of the sensing element structure including the touch panel of the present invention, and FIG. 5 is a schematic view of the sensing element structure of the touch panel shown in FIG. Schematic cross-section of 5-5'. If the sensing element structure 110 of the present invention shown in FIGS. 1 and 2 is taken as the basic unit of the sensing element structure, then in this embodiment, the sensing element structure 600 of the touch panel of the present invention may include The basic units of the sensor structure 110 are overlapped with each other in different directions to form sensing series respectively extending in the Y direction and the X direction. For ease of distinction, in the following embodiments, the basic unit including the sensing element structure extending along the first direction Y is denoted by reference numeral 100, while the basic unit including the sensing element structure extending along the second direction X is Denoted by reference numeral 200 , the same part of the sensing element structure basic unit 100 as that of the first embodiment will not be repeated here. In this embodiment, the sensing element structure basic unit 100 is disposed on the first surface 112a' of the first substrate 112', and the sensing element structure basic unit 200 is similar in structure to the sensing element structure basic unit 100 and is disposed on the first surface 112a' of the first substrate 112'. On the second surface 112b' of the first substrate 112', the first surface 112a' is parallel to and opposite to the second surface 112b'.

The sensing element structure basic unit 200 includes a plurality of second sensing series 228 extending along a second direction X and arranged parallel to each other, wherein the second direction X intersects the first direction Y, for example, the two are perpendicular to each other. FIG. 4 is represented by three second sensing series 228a, 228b, 228c. Each second sensing series 228 includes a plurality of second sensing units 214 electrically connected to each other and adjacent along the second direction X and arranged in a straight line. Each second sensing unit 214 includes a second relief structure 216 and a second conductive material 218, wherein the second relief structure 216 is formed by a relief material layer 220, and the second conductive material 218 is disposed on the second relief structure. Inside the accommodating space 216a of the protruding structure 216 . Each second sensing series 228 further includes a plurality of second grooves 222 disposed between two adjacent second sensing units 214 of the same second sensing series 228 so that the second relief structure 216 The accommodating spaces 216a communicate with each other. It can be seen from FIG. 4 and FIG. 5 that the first sensing unit 114 and the second sensing unit 214 are misaligned in the direction perpendicular to the first surface 112a' of the first substrate 112' without overlapping each other, but the first groove 122 partially overlaps with the second trench 222 in a direction perpendicular to the first surface 112 a ′.

The sensing element structure basic unit 200 further includes a second sealing layer 224 covering the surface of the second relief structure 216 to seal the second conductive material 218 in the accommodating space 216 a and the second groove 222 . Furthermore, the sensing element structure basic unit 200 may further include a plurality of second wire structures 230, which are respectively provided at one end of each second sensing series 228, and are connected to the second conducting wires of the corresponding second sensing series 228. The material 218 contacts to be electrically connected to the second sensing series 228 . In addition, the cavities 226 between the second sensing series 228 may not be filled with any material, or may be filled with a transparent non-conductive material or the second conductive material 218, or when the second embossed structure 216 is fabricated, the first No cavity 226 is formed between the two sensing series 228 .

Since the sensing element structure 600 of this embodiment includes the first sensing series 128 and the second sensing series 228 perpendicular to each other and the corresponding first wire structure 130 and the second wire structure 230 , the present invention senses The device structure 600 can also be regarded as a touch panel capable of providing a complete touch function, wherein the part including the first sensing series 128 and the second sensing series 228 is used as the signal sensing area 610, and the first sensing area 610 is set. Parts of the conducting wire structure 130 and the second conducting wire structure 230 are regarded as the peripheral circuit area 612 . The user's touch position can be calculated through the first sensing series 128 and the second sensing series 228 in the Y and X directions. In different embodiments, the two sides of the first sensing series 128 are respectively connected to two first wire structures 130, and the two sides of the second sensing series 228 may also be respectively connected to two second wire structures 230, for example As shown in Figure 1, but not limited thereto. It can be known from the above that the sensing element structure 600 of this embodiment utilizes the basic units 100 and 200 of the sensing element structure to be vertically fabricated on opposite surfaces of the first substrate 112 to provide sensing functions in the X direction and the Y direction. Similar to the previous embodiment, the sensing element structure 600 can be manufactured in a roll-to-roll manner. For example, the basic unit 100 of the sensing element structure is fabricated on the first surface 112a' of the first substrate 112' by the manufacturing process shown in FIG. 3 . Afterwards, the basic unit 200 of the sensing element structure is fabricated on the second surface 112b' of the first substrate 112' in a similar process, and then the first substrate 112' is cut into required dimensions as required.

Please refer to FIG. 6 and FIG. 7A, FIG. 6 is a schematic top view of a third embodiment of the structure of the sensing element including the touch panel of the present invention, and FIG. 7A is the structure of the sensing element of the touch panel shown in FIG. 6 along the tangent line 7-7' Schematic cross-section. The sensing element structure 700 of this embodiment differs from the previous embodiment in that the sensing element structure basic unit 100 and the sensing element structure basic unit 200 are respectively manufactured on different substrates, for example, the sensing element structure basic unit 100 is fabricated first. On the first surface 112a of the first substrate 112, the sensing element structure basic unit 200 is fabricated on the first surface 212a of the second substrate 212, and then the second substrate 212 is fixed on the first substrate by using an adhesive layer 136 112 is on the second surface 112b opposite to the first surface 112a, wherein the first sensing series 128 and the second sensing series 228 are extended and arranged along the vertically intersecting first direction Y and the second direction X respectively, and are adhered The layer 136 is a transparent material and may include transparent materials such as solid or liquid optical clear adhesive (OCA). Thus, the touch panel formed by the sensing element structure 700 of the third embodiment of the present invention is completed.

It is worth noting that although the second sensing series 228 in this embodiment is disposed on the first surface 212 a of the second substrate 212 opposite to the first substrate 112 , the sensing element structure basic unit 100 , the first substrate 112 The relative positions of the adhesive layer 136 and the relative positions of the sensing element structural basic unit 200, the second substrate 212 and the adhesive layer 136 are not limited to those shown in FIG. 7, for example, when the sensing element structural basic units 100, 200 are fixed , the sensing element structure basic unit 200 or 100 can be turned upside down, for example, the second sensing series 228 is located between the second substrate 212 and the adhesive layer 136, or the first sensing series 128 is located on the first substrate 112 and the adhesive layer 136. Please refer to FIG. 7B , FIG. 7C and FIG. 7D . FIG. 7B to FIG. 7D are structural schematic diagrams of the first variation embodiment, the second variation embodiment and the third variation embodiment of the sensing element structure shown in FIG. 7A . As shown in FIG. 7B , the difference between this first variant embodiment and the third embodiment of the present invention shown in FIG. 7A is that the basic unit 200 of the sensing element structure is set upside down, that is, the first sensing element of the second sensing series 228 Two embossing structures 216 and a second conductive material 218 are arranged between the second substrate 212 and the adhesive layer 136; the difference between the second variant embodiment shown in FIG. 7C and FIG. 7A is that the basic unit 100 of the sensing element structure is set upside down. , that is, the first relief structure 116 and the first conductive material 118 are disposed between the first substrate 112 and the adhesive layer 136; and the difference between the third variant embodiment shown in FIG. 7D and FIG. 7A is that the structure of the sensing element is basically Both units 100 and 200 are arranged upside down.

Please refer to FIG. 8 and FIG. 9, FIG. 8 is a schematic top view of a fourth embodiment of a sensing element structure including a touch panel of the present invention, and FIG. 9 is a schematic view of the sensing element structure of the touch panel shown in FIG. -Schematic cross-section of 9'. The difference between the sensing element structure 800 of this embodiment and the third embodiment is that the second substrate 212 and the adhesive layer 136 in FIGS. 7A-7D are replaced by a protective layer 138 made of a transparent material. Therefore, the fabrication process may include forming a flat protective layer 138 on the surface of the first sealing layer 124 after fabricating the basic unit 100 of the sensing element structure on the first surface 112a'' of the first substrate 112'' to completely cover the The surface and side of the sensing element structure basic unit 100 are then fabricated on the surface of the protective layer 138 opposite to the sensing element structure basic unit 100 in a roll-to-roll manner, for example. Therefore, the first sensing series 128 and the second sensing series 228 of this embodiment are sequentially disposed on the first surface 112a" of the first substrate 112" from bottom to top.

Please refer to FIG. 10 and FIG. 11 , FIG. 10 is a schematic top view of a fifth embodiment of the sensing element structure including the touch panel of the present invention, and FIG. 11 is the sensing element structure of the touch panel shown in FIG. 10 along the tangent 11 -11'Schematic cutaway. The first sensing unit 114, the first groove 122 and the second sensing unit 214 of the sensing element structure 900 of the fifth embodiment of the present invention are all directly fabricated on the first surface 112a" of the first substrate 112'". ′, and the first sensing unit 114 and the second sensing unit 214 are misaligned and arranged side by side in a matrix. The embossed material layer 120 constitutes the first embossed structure 116, the first groove 122 and the second embossed structure 216 at the same time, so the first sensing series 128a, 128b, 128c has a structure similar to that of FIG. There is no second groove disposed between adjacent second embossed structures 216 , so the second conductive material 218 of each second sensing unit 214 is sealed in each second embossed structure 216 . Compared with the previous embodiments, the sensing element structure 900 of this embodiment further includes a plurality of conductive bridge elements 240 respectively disposed between any two adjacent second sensing units 214 of the same second sensing series 228 , the conductive bridging element 240 is in contact with the second conductive material 118 of the second sensing unit 214 through the through hole 242 of the first sealing layer 124, and is used to electrically connect adjacent second sensing units 214, so that the same second The second sensing units 214 of the sensing series 228 are electrically connected to each other. Accordingly, each second sensing series 228 is composed of a plurality of second sensing units 214 and a plurality of conductive bridging elements 240 . FIG. 10 illustrates three second sensing series 228 a , 228 b , 228 c . It is worth noting that although the second sensing series 228 and the first sensing series 128 are arranged alternately on the first surface 112a''' of the first substrate 112''', since the conductive bridging element 240 straddles the Above the first trench 122 , therefore, it will not be electrically connected with the first sensing series 128 . The fabrication method of the conductive bridging element 240 is, for example, after forming the first sealing layer 124, performing a laser perforation or etching process to form a plurality of through holes 242 in the first sealing layer 124, and then performing a screen printing process, The conductive bridging element 240 is formed on the through hole 242 and the surface of the first sealing layer 124 . In addition, the sensing element structure 900 of this embodiment may further include a protective layer 138 disposed on the surface of the first sealing layer 124 and the conductive bridge element 240, covering the second sensing series 228 and the first sensing series 128 to provide protection. .

It should be noted that the embossed structures of the present invention are not limited to the diamond shape disclosed in the foregoing embodiments. In order to increase the sensitivity of the lateral capacitance and improve the performance of the touch panel, the lateral projected area of each sensing unit can be increased. For example, the pattern of each sensing unit is complicated to increase its perimeter, thereby increasing the projected area of the lateral capacitance. Please refer to FIG. 12 , which shows a schematic diagram of a variation embodiment of the sensing unit pattern. Compared with FIG. 1 , each first relief structure 116 in the modified embodiment shown in FIG. 12 has a snowflake-like pattern, and the lateral projected area of the first sensing unit 114 is greatly increased due to the curved shape.

To sum up, the sensing series in the sensing element structure of the touch panel of the present invention mainly uses transparent conductive materials such as nano-silver wires, nano-metal particles, or nano-graphite materials as electrical elements, and The shape and position of each sensing series are defined by using the embossed structure and the sealing layer. Since the above-mentioned conductive materials have good transmittance and low color shift characteristics, they can also provide good electrical effects, so they can take into account the requirements of high transmittance, low surface resistance and low color shift, and contain nano silver wire, nano The cost of transparent conductive materials such as metal particles or nano-graphite materials is also lower than that of traditional metal oxide materials, so the present invention can reduce the production cost of the touch panel. Moreover, because the design of the embossed structure can be applied to flexible display panels, the structure of the present invention can also be applied to flexible touch panels, effectively avoiding the existing problem of brittle cracks caused by the high brittleness of ITO. In addition, the structure of the present invention can be produced in a roll-to-roll manner, and the shape and density of the embossed structure can be designed and adjusted according to the needs, and the sensing series can be produced continuously in large quantities, avoiding the use of the yellow light manufacturing process in the traditional structure, so that it can effectively Increase productivity and reduce costs. On the other hand, the wire structure in the peripheral circuit area can also be made by screen printing, which has high flexibility adjustment and customization capabilities. One of the advantages of the present invention.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (20)

1. the sensing element structure of a contact panel, this sensing element structure comprises many first sensing serials, is arranged at a first surface of one first substrate respectively along a first direction, respectively this first sensing serials comprises:

A plurality of first sensing cells are side by side adjacent along this first direction, and wherein respectively this first sensing cell comprises respectively:

First relief (embossment) structure has an accommodation space; And

First conductive material is placed in this accommodation space of this first swelling structure: and

A plurality of first grooves, be arranged at respectively between wantonly two adjacent these a plurality of first sensing cells of same this first sensing serials, so that these a plurality of accommodation spaces of wantonly two adjacent these a plurality of first swelling structures communicate by this first groove respectively, and this first conductive material more is arranged in these a plurality of first grooves, so that these a plurality of first sensing cells are electrically connected mutually.

2. sensing element structure as claimed in claim 1, other comprises one first sealant, is covered in the surface of these a plurality of first swelling structures.

3. sensing element structure as claimed in claim 1, wherein this first conductive material comprises nanometer filamentary silver (silver nanowire), nano-metal particle (nano metal particles) or nano-graphite material.

4. sensing element structure as claimed in claim 1, it comprises a plurality of first conductor structures in addition, lays respectively at a respectively end of this first sensing serials, contacts to be electrically connected this first sensing serials with this first conductive material of this first sensing serials.

5. sensing element structure as claimed in claim 1 also comprises:

Many second sensing serials are arranged at a side of this first substrate along a second direction, wherein this second direction and this first direction intersect, respectively this second sensing serials comprises a plurality of second sensing cells of mutual electrical connection, side by side adjacent along this second direction, wherein respectively this second sensing cell comprises respectively:

Second swelling structure has an accommodation space; And

Second conductive material is placed in this accommodation space of this second swelling structure; And

A plurality of second conductor structures lay respectively at a respectively end of this second sensing serials, contact to be electrically connected this second sensing serials with this second conductive material in this second sensing serials.

6. sensing element structure as claimed in claim 5, wherein respectively this second sensing serials comprises a plurality of second grooves in addition, be located between wantonly two adjacent these a plurality of second swelling structures of same this second sensing serials, so that a plurality of accommodation spaces of this of these a plurality of second swelling structures communicate, and be equipped with this second conductive material in addition in these a plurality of second grooves.

7. sensing element structure as claimed in claim 6, wherein these a plurality of second sensing serials are arranged at a second surface of this first substrate, and wherein this second surface of this first substrate and this first surface are oppositely arranged.

8. sensing element structure as claimed in claim 6 also comprises:

Second substrate is arranged at this first substrate in contrast to a second surface of this first surface, and these a plurality of second sensing serials are arranged on this second substrate; And

Adhesive coating is arranged between this first substrate and this second substrate.

9. sensing element structure as claimed in claim 6, wherein these a plurality of first sensing serials from bottom to top are arranged on this first surface of this first substrate in regular turn with these a plurality of second sensing serials.

10. sensing element structure as claimed in claim 9, other comprises that a protective seam is arranged on these a plurality of first sensing serials, and these a plurality of second sensing serials are arranged on the surface of this protective seam.

11. sensing element structure as claimed in claim 5, also comprise a plurality of conductive bridge elements, be located between wantonly two adjacent these a plurality of second sensing cells of same this second sensing serials, be used for being electrically connected these adjacent a plurality of second sensing cells, so that a plurality of second sensing cells of this of same this second sensing serials are electrically connected to each other, wherein respectively this conductive bridge element is not connected with these a plurality of first sensing serials.

12. sensing element structure as claimed in claim 11, wherein these a plurality of second sensing serials are crisscross arranged on this first surface of this first substrate with these a plurality of first sensing serials.

13. sensing element structure as claimed in claim 12 also comprises a protective seam, is covered on these a plurality of second sensing serials and these a plurality of first sensing serials.

14. sensing element structure as claimed in claim 5 also comprises one second sealant, is covered in the surface of these a plurality of second sensing serials.

15. the method for making of the sensing element structure of a contact panel comprises:

One first substrate is provided, has a first surface;

Form a plurality of first swelling structures and a plurality of first groove in this first surface, wherein these a plurality of first swelling structures are arrayed and have an accommodation space respectively, and respectively this first groove is arranged at along between these a plurality of first swelling structures of the adjacent arrangement of a first direction, to be communicated with these a plurality of first swelling structures;

In these a plurality of accommodation spaces of this a plurality of first swelling structures and these a plurality of first grooves, insert one first conductive material; And

Form a sealant in this a plurality of first swelling structures surface, this first conductive material is sealed in these a plurality of accommodation spaces and these a plurality of first grooves.

16. the method for making of sensing element structure as claimed in claim 15, the step that wherein forms these a plurality of first swelling structures, inserts this first conductive material and seal this first conductive material utilizes a volume to volume (roll-to-roll) manufacture craft to finish.

17. the method for making of sensing element structure as claimed in claim 15 also is included in and forms a plurality of first conductor structures on this first surface of this first substrate, to be electrically connected wherein this first conductive material in of these a plurality of first swelling structures respectively.

18. comprising, the method for making of sensing element structure as claimed in claim 17, the mode that wherein forms these a plurality of first conductor structures carry out a screen painting manufacture craft.

19. the method for making of sensing element structure as claimed in claim 15, wherein this first conductive material comprises nanometer filamentary silver, nano-metal particle or nano-graphite material.

20. the method for making of sensing element structure as claimed in claim 15 also comprises:

Form a plurality of second swelling structures in this first surface, wherein these a plurality of second swelling structures are arrayed and have an accommodation space respectively;

These a plurality of accommodation spaces in these a plurality of second swelling structures are inserted one second conductive material;

Form a plurality of through holes in the sealing layer; And

Carry out a screen painting manufacture craft, on the sealing layer, to form a plurality of bridging elements, wherein each bridging element is arranged at along between these a plurality of second swelling structures of the adjacent arrangement of a second direction, and be electrically connected with this second conductive material in these a plurality of second swelling structures by these a plurality of through holes respectively, wherein this second direction and this first direction intersect.

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