TWI780811B - Stretchable conductive substrate - Google Patents

Abstract

A stretchable conductive substrate includes a substrate and a circuit layer. The substrate has a plurality of predetermined areas. The circuit layer is formed on the substrate, and defines a conductive contact group and at least one elastic wire structure connected to the conductive contact group in each of the predetermined areas. The elastic wire structure includes at least one patterned wire segment, and a stretch rate thereof in a length direction of the substrate is from 0% to 60%. Therefore, the stretchable conductive substrate can meets the requirements of flexible electronics, and has significant economic benefits.

Description

stretchable conductive substrate

The present invention relates to a conductive substrate, in particular to a stretchable conductive substrate, which can be applied to flexible electronic devices such as electronic skins and flexible display screens.

With the development of electronic technology, more and more attention has been paid to flexible electronic devices. Since flexible electronic devices can still work normally under a certain degree of deformation (such as bending or stretching deformation), compared with traditional electronic devices, they have higher flexibility in use and are more adaptable to different working environments.

In the prior art, substrates made of flexible materials are used to replace substrates made of rigid materials, so that electronic devices can be bent or stretched, thereby increasing the convenience of use and operation. However, such an approach not only cannot prevent the metal wire from being damaged by bending or tensile stress, but also cannot suppress the impedance change caused by the bending or stretching of the metal wire.

The technical problem to be solved by the present invention is to provide a stretchable conductive substrate capable of taking both stretchability and electrical stability into account in view of the deficiencies in the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a stretchable conductive substrate, which includes a substrate and a circuit layer. The substrate has a plurality of predetermined areas, the circuit layer is formed on the substrate, and is defined in each of the predetermined areas A conductive contact group and at least one elastic wire structure connected with the conductive contact group are provided. The elastic wire structure has at least one patterned line segment, and the stretch rate of the elastic wire structure along a length direction of the substrate is 0% to 60%.

In an embodiment of the present invention, the patterned line segment has at least one first curved portion and at least one second curved portion connected, and the curvature of the first curved portion is smaller than the curvature of the second curved portion.

In an embodiment of the present invention, the curvature of the first curved portion is 0.1 mm to 10 mm, and the curvature of the second curved portion is 0.5 mm to 15 mm.

In an embodiment of the present invention, the patterned line segment has a plurality of hollow pattern units, and the plurality of hollow pattern units are connected to each other and arranged linearly along the length direction of the substrate. The shape of each hollow pattern unit is N-gon, and N is a positive integer greater than or equal to 3.

In an embodiment of the present invention, the stretchable conductive substrate further includes an elastic conductive layer formed on the circuit layer.

In an embodiment of the invention, the elastic conductive layer is formed of a conductive composition. Based on 100wt% of the conductive composition, the conductive composition comprises 45wt% to 65wt% conductive material, and the conductive material is selected from gold, palladium, platinum, nickel, copper, copper-clad silver, graphene and nano A group of rice carbon tubes.

In an embodiment of the present invention, each of the hollow pattern units includes a plurality of corner portions and a plurality of straight-edge portions, and there is one straight-edge portion between any two adjacent corner portions. The elastic conductive layer includes a plurality of elastic conductive structures, and each of the plurality of corner portions of the hollow pattern unit has an elastic conductive structure.

In an embodiment of the present invention, each of the hollow pattern units includes a plurality of corner portions and a plurality of straight-edge portions, and there is one straight-edge portion between any two adjacent corner portions. The elastic conductive layer includes a plurality of elastic conductive structures, and each of the hollow pattern units Each of the plurality of straight edge portions has an elastic conductive structure.

In an embodiment of the present invention, the overlapping ratio between each corner portion or the straight portion and the corresponding elastic conductive structure is 5% to 50%.

In an embodiment of the present invention, the stretchable conductive substrate further includes an elastic conductive layer, the elastic conductive layer is formed on the circuit layer, and includes a plurality of elastic conductive structures. The patterned line segment has a plurality of solid pattern units, the plurality of solid pattern units are separated from each other by a distance and arranged linearly along the length direction of the substrate, and any two adjacent solid pattern units pass through a The elastic conductive structure forms an electrical connection. The shape of each solid pattern unit is N-gon, and N is a positive integer greater than or equal to 3.

One of the beneficial effects of the present invention is that the stretchable conductive substrate of the present invention can pass through "the elastic wire structure has at least one patterned line segment, and the elastic wire structure is along a length direction of the substrate 0% to 60%" technical feature to reduce or even eliminate the structural weakness of the wire, thereby greatly reducing the risk of wire breakage during stretching, and allowing the wire to have good stretch recovery performance and electrical conductivity Sexual stability (little change in impedance under tension).

Furthermore, the stretchable conductive substrate can further include an elastic conductive layer, which can be formed by applying a conductive composition (such as conductive paste) on the circuit layer, which can prevent the metal wire from bending Or the damage of tensile stress, and can suppress the impedance change caused by the bending or stretching of the metal wire.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings related to the present invention. However, the provided drawings are only for reference and description, and are not intended to limit the present invention.

P: electronic device

Z: stretchable conductive substrate

1: Substrate

100: scheduled area

101: First Surface

102: second surface

2: Line layer

21: Conductive contact group

211: Conductive contact

22: Elastic wire structure

221: Patterned line segments

221A: first curved portion

221B: second curved part

221C: hollow pattern unit

2211: corner part

2212: Straight edge part

221D: solid pattern unit

3: Elastic conductive layer

31: Elastic conductive structure

4: Line layer

41: Signal transmission line

E: electronic devices

U: control unit

S: human skin

FIG. 1 is a schematic structural view of a stretchable conductive substrate according to a first embodiment of the present invention.

FIG. 2 is a partially enlarged view of part II in FIG. 1 , showing the wire design of the first embodiment of the present invention.

FIG. 3 is another structural schematic diagram of the stretchable conductive substrate according to the first embodiment of the present invention.

FIG. 4 is another structural schematic diagram of the stretchable conductive substrate according to the first embodiment of the present invention.

FIG. 5 and FIG. 6 are partial enlarged views of part II in FIG. 1 , showing the wire design of the second embodiment of the present invention.

FIG. 7 and FIG. 8 are partial enlarged views of part II in FIG. 1 , showing one optimization method of the wire design in the second embodiment of the present invention.

FIG. 9 and FIG. 10 are partial enlarged views of part II in FIG. 1 , showing another optimization method of the wire design in the second embodiment of the present invention.

FIG. 11 shows one possible implementation of the optimization method of wire design in the second embodiment of the present invention.

FIG. 12 shows another possible implementation of the wire design optimization method of the second embodiment of the present invention.

FIG. 13 is a partially enlarged view of part II in FIG. 1 , showing the wire design of the fourth embodiment of the present invention.

FIG. 14 is a schematic structural diagram of an electronic device using a stretchable conductive substrate according to an embodiment of the present invention.

FIG. 15 is a diagram of an electronic device using a stretchable conductive substrate according to an embodiment of the present invention. A schematic diagram of the state of use.

FIG. 16 is a schematic diagram of another usage state of an electronic device using a stretchable conductive substrate according to an embodiment of the present invention.

The implementation of the "stretchable conductive substrate" disclosed in the present invention is described below through specific examples. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple illustration, and are not drawn according to the actual size, which is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

Unless otherwise defined, the terms used in the present invention have meanings commonly understood by those skilled in the art. The materials used in the following examples are commercially available materials unless otherwise specified. The operations or instruments used in the following examples are common operations or instruments in the art unless otherwise specified. The proportions, contents, etc. described in the following examples are by weight unless otherwise specified.

[first embodiment]

Please refer to FIG. 1 and FIG. 2 , FIG. 1 shows the main structure of the stretchable conductive substrate Z of the present invention, and FIG. 2 shows one of the wire designs on the stretchable conductive substrate Z. As shown in the above figures, the stretchable conductive substrate Z mainly includes a substrate 1 and a first circuit layer 2 . The substrate 1 has a plurality of predetermined areas 100, which may be the disposition areas of electronic devices such as light-emitting elements and sensors, but are not limited thereto. The first circuit layer 2 is formed on the substrate 1 and defines a conductive contact in each predetermined area 100 group 21 and at least one elastic wire structure 22 connected to the conductive contact group 21 . In actual application, the conductive contact set 21 may include a plurality of conductive contacts 211, which may be used as connection interfaces and/or signal transmission interfaces of electronic devices; the conductive contacts 211 may exist in the form of contact pads, but not limited thereto. It should be noted that the number and distribution positions of the conductive contacts 211 and the elastic wire structures 22 in each predetermined area 100 are not particularly limited, and can be adjusted and designed according to actual needs.

It is worth mentioning that the elastic wire structure 22 has at least one patterned line segment 221, so it has good stretch recovery performance, can withstand a certain degree of stretch deformation, and even if it is stretched, it will only cause a small change in impedance; In the test, the elongation rate of the elastic wire structure 22 along a length direction of the substrate 1 is 0% to 60%.

In this embodiment, the substrate 1 can be an elastic substrate with bendable and stretchable properties, the substrate 1 has a first surface 101 (such as the upper surface) and a second surface 102 (the lower surface) opposite, and the first The circuit layer 2 is formed on the first surface 101 of the substrate 1 for providing conductive contacts and signal transmission lines. In actual application, the material of the substrate 1 can be enumerated: polyethylene terephthalate (Polyethylene terephthalate, PET), polymethyl methacrylate (Polymethyl methacrylate, PMMA), polyimide (Polyimide, PI) and Polycarbonate (Polycarbonate, PC); the material of the first circuit layer 2 includes: gold, silver, copper and other metals with good conductivity and their alloys. However, the present invention is not limited to the above-mentioned examples.

Furthermore, as shown in FIG. 2 , the patterned line segment 221 of the elastic wire structure 22 has at least one first curved portion 221A and at least one second curved portion 221B connected, wherein the curvature of the first curved portion 221A is smaller than that of the second curved portion 221A. The curvature of the curved portion 221B, and the curved direction of the first curved portion 221A is different from the curved direction of the second curved portion 221B. Preferably, the curvature of the first curved portion 221A is 0.1 mm to 10 mm, and the curvature of the second curved portion 221B is 0.5 mm to 15 mm. With such a structural design, the structural weakness of the wire can be reduced or even eliminated, thereby greatly reducing the risk of the wire breaking during stretching, and allowing the wire to have good stretch recovery performance and Electrical stability (little change in impedance under tension). It should be noted that when the number of the first curved portion 221A and the second curved portion 221B are two or more, their arrangement is not particularly limited; for example, two first curved portions 221A and the two second bent portions 221B may be arranged in an ABAB or ABBA manner to form the patterned line segment 221 .

Please refer to FIG. 3 and FIG. 4 , which show other possible structures of the conductive substrate Z. As shown in FIG. 3 and FIG. 4 , the stretchable display module P of the present invention may further include a second circuit layer 4 to enhance the flexibility of circuit layout design. The second wiring layer 4 can be formed on the first surface 101 of the substrate 1 in a manner avoiding the location of the first wiring layer 2, that is, the second wiring layer 4 and the first wiring layer 2 are mutually formed on the first surface 101 of the substrate 1. not overlap; alternatively, the second circuit layer 4 can be formed on the second surface 102 of the substrate 1 .

Furthermore, the second circuit layer 4 may include a plurality of signal transmission lines 41 for transmitting electrical signals (current signals or voltage signals). It is worth mentioning that the signal transmission line 41 can adopt the wire design described in this embodiment (that is, the patterned line segment 221 has a first curved portion 221A with a smaller curvature and a second curved portion 221B with a larger curvature), so as to obtain the same or similar technical effects. In practical applications, under the framework shown in FIG. 3 , the second circuit layer 4 can form an electrical connection with the first circuit layer 2 in a direct contact manner. In addition, under the architecture shown in FIG. 4 , the second circuit layer 4 can be electrically connected to the first circuit layer 2 through one or more via holes (not shown in the figure); One conductive contact 211 can form an electrical connection with one of the signal transmission lines 41 through a corresponding via hole.

Although the extension direction of the signal transmission line 41 shown in FIG. 3 and FIG. 4 is parallel to the length direction of the substrate 1, according to different circuit layout designs, the extension direction of the signal transmission line 41 can also be perpendicular to the length of the substrate 1. direction.

[Second embodiment]

Please refer to FIG. 5 and FIG. 6 together with FIG. 1 . FIG. 5 and FIG. 6 show another wire design on the stretchable conductive substrate Z. As shown in the above figures, the stretchable conductive substrate Z mainly includes a substrate 1 and a first circuit layer 2 . The substrate 1 has a plurality of predetermined regions 100, and the first circuit layer 2 is formed on the substrate 1, and define a conductive contact group 21 and at least one elastic wire structure 22 connected to the conductive contact group 21 in each predetermined area 100. The elastic wire structure 22 has at least one patterned line segment 221 to have good stretch recovery performance, and the stretch rate of the elastic wire structure 22 along a length direction of the substrate 1 is 0% to 60%. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and are not repeated here to reduce repetition. Correspondingly, the related technical details mentioned in this embodiment can also be applied in the first embodiment.

In this embodiment, the patterned line segment 221 adopts different structural designs, that is, the patterned line segment 221 has a plurality of hollow pattern units 221C, and the plurality of hollow pattern units 221C are connected to each other and arranged linearly along the length direction of the substrate 1; the hollow pattern The shape of the unit 221C is N-gon, and N is a positive integer greater than or equal to 3. With such a structural design, the structural weakness of the wire can be reduced or even eliminated, thereby greatly reducing the risk of the wire breaking during stretching, and allowing the wire to have good stretch recovery performance and electrical stability (stretched state The lower impedance changes very little). It should be noted that the shape of the hollow pattern unit 221C is not particularly limited; for example, as shown in FIG. 5 and FIG. 6 , the shape of the hollow pattern unit 221C may be a quadrangle or a hexagon.

Please refer to FIG. 7 to FIG. 10 , which show the optimized design of the main structure of the stretchable conductive substrate Z of the present invention. As shown in FIGS. 7 to 10 , the stretchable conductive substrate Z may further include an elastic conductive layer 3 , and the elastic conductive layer 3 is formed on the first circuit layer 2 . Furthermore, the elastic conductive layer 3 includes a plurality of elastic conductive structures 31, and each hollow pattern unit 221C includes a plurality of corner portions 2211 and a plurality of straight edge portions 2212, wherein there is a gap between any two adjacent corner portions 2211. One straight part 2212, and a plurality of straight parts 2212 can respectively have an elastic conductive structure 31, as shown in Figure 7 and Figure 8, or a plurality of corner parts 2211 can respectively have an elastic conductive structure 31, as shown 9 and Figure 10. Considering the overall stretching effect and structural adaptability (ability to adapt to different three-dimensional structures), the overlapping ratio between each corner portion 2211 or straight portion 2212 and the corresponding elastic conductive structure 31 is 5% to 50%.

Please refer to Fig. 11 and Fig. 12 again. In actual application, the elastic conductive structure 31 can only be covered on the upper surface of the corner part 2211 or the straight part 2212, as shown in Fig. 11, or the elastic conductive structure 31 can not only be covered It covers the upper surface of the corner portion 2211 or the straight portion 2212 and also covers the side surface of the corner portion 2211 or the straight portion 2212 , as shown in FIG. 12 . The above descriptions are only feasible implementation manners, and are not intended to limit the present invention.

The elastic conductive layer 3 can be formed by a conductive composition (such as conductive paste), the conductive composition can be applied in the form of conductive paste, and the application method can be printing, dispensing, spray printing or transfer printing, but the present invention is not limited to this. The conductive composition mainly comprises 45wt% to 65wt% conductive material (based on 100wt% conductive composition), wherein the conductive material is selected from gold, palladium, platinum, nickel, copper, copper-coated silver, graphene and carbon nanotubes composed of groups. It should be noted that the shape of the conductive material is not particularly limited, and may be flake, spherical or dendritic. In practical application, the conductive composition may further include 10wt% to 20wt% of binder, 0wt% to 35wt% of solvent and 0.1wt% to 3wt% of processing aid (based on 100wt% of the conductive composition).

In some embodiments, the content of the conductive material in the conductive composition can be 45wt%, 50wt%, 55wt%, 60wt% or 65wt%; the content of the binder in the conductive composition can be 10wt%, 15wt% or 20wt% %. The content of the solvent in the conductive composition can be 5wt%, 10wt%, 15wt%, 20wt%, 25wt%, 30wt% or 35wt%; the content of the processing aid in the conductive composition can be 0.5wt%, 1.0wt% , 1.5wt%, 2.0wt%, 2.5wt% or 3.0wt%.

Specific examples of the adhesive include: phenolic resin, epoxy resin, acrylate monomer, polyurethane, diisocyanate, hydroxyethyl methacrylate, acrylonitrile-butadiene-styrene copolymer (ABS), nylon (Nylon ), polylactic acid (PLA), polyethersulfone (PES), ethyl cellulose, hydroxyethyl methyl cellulose and hydroxyethyl cellulose. Specific examples of solvents include: butyl soluble anhydride acetate (BCA), diethylene glycol butyl ether acetate, diethylene glycol ethyl ether acetate, isophoracetone, N-methylolacrylamide (NMA), diethylene glycol , tetrahydrofuran, polyethylene glycol and glycols (such as butanediol). Specific examples of processing aids include: Dispersant, leveling agent, antioxidant and stabilizer. However, the present invention is not limited to the above examples.

Please refer to FIG. 3 and FIG. 4 again. Under the structure that the stretchable display module P further includes another second circuit layer 4, its signal transmission line 41 can adopt the wire design described in this embodiment (that is, the pattern The line segment 221 has a plurality of hollow pattern units 221C) connected to each other and arranged linearly, so as to obtain the same or similar technical effect.

[Third embodiment]

Please refer to FIG. 11 together with FIG. 1 . FIG. 11 shows another wire design on the stretchable conductive substrate Z. As shown in the above figure, the stretchable conductive substrate Z includes a substrate 1, a first circuit layer 2 and an elastic conductive layer 3, the first circuit layer 2 is formed on the substrate 1, and the elastic conductive layer 3 is formed on On the first line layer 2. Furthermore, the substrate 1 has a plurality of predetermined regions 100 , and the first circuit layer 2 defines a conductive contact group 21 and at least one elastic wire structure 22 connected to the conductive contact group 21 in each predetermined region 100 . The elastic wire structure 22 has at least one patterned line segment 221 to have good stretch recovery performance, and the stretch rate of the elastic wire structure 22 along a length direction of the substrate 1 is 0% to 60%. The relevant technical details mentioned in the first and second implementation manners are still valid in this embodiment, and will not be repeated here to reduce repetition. Correspondingly, the relevant technical details mentioned in this embodiment can also be applied in the first and second implementation manners.

In this embodiment, the patterned line segment 221 adopts a different structural design, that is, the patterned line segment 221 has a plurality of solid pattern units 221D, and the plurality of solid pattern units 221D are separated from each other by a distance and arranged linearly along the length direction of the substrate 1; The shape of the solid pattern unit 221D is N-gon, and N is a positive integer greater than or equal to 3. Moreover, the elastic conductive layer 3 includes a plurality of elastic conductive structures 31 , and any two adjacent solid pattern units 221D are electrically connected through one elastic conductive structure 31 . With such a structural design, the structural weakness of the wire can be reduced or even eliminated, thereby greatly reducing the risk of the wire breaking during stretching, and allowing the wire to have good stretch recovery performance and electrical stability (stretched state The lower impedance changes very little). It should be noted that the shape of the solid pattern unit 221D The shape is not particularly limited, as long as two adjacent solid pattern units 221D can be electrically connected.

Please refer to FIG. 3 and FIG. 4 again. Under the structure that the stretchable display module P further includes another second circuit layer 4, its signal transmission line 41 can adopt the wire design described in this embodiment (that is, the pattern The line segment 221 has a plurality of solid pattern units 221D) spaced apart from each other and arranged linearly, so as to obtain the same or similar technical effect.

[Fourth Embodiment]

Please refer to FIG. 14 to FIG. 16 , FIG. 14 shows an electronic device P applying the stretchable conductive substrate Z of the present invention, and FIG. 15 and FIG. 16 show the use status of the electronic device P. As shown in the above figures, the electronic device P may include a stretchable conductive substrate Z as described in the first, second or third embodiment, a plurality of electronic devices E and one or more control units U. A plurality of electronic devices E are respectively arranged in a plurality of predetermined regions 100 of the stretchable conductive substrate Z, and each electronic device E is electrically connected and fixed (Bonded to) the conductive contact group in the predetermined region 100 21 , the control unit U is electrically connected to the stretchable conductive substrate Z, and the electronic device E can be controlled through the stretchable conductive substrate Z.

For ease of understanding, the electronic device P provided in this embodiment is described here by taking the electronic skin as an example. As shown in FIG. 15 and FIG. 16, a plurality of electronic devices E of the electronic device P may include one or more light-emitting elements (such as light-emitting diodes) and one or more sensors, and are in contact with human skin S during use. Contacts to monitor breathing, heart rate, exercise, sleep and more. It is worth mentioning that in the presence of the stretchable conductive substrate Z, the electronic device P can withstand stretching force and bending tension in the length or thickness dimension to a certain extent, even if it is stretched or bent during use. Deformation can also function normally, so the performance of the electronic device P will not be negatively affected.

[Advantageous Effects of Embodiment]

One of the beneficial effects of the present invention is that the stretchable conductive substrate of the present invention can pass through "the elastic wire structure has at least one patterned line segment, and the elastic wire structure is along a length direction of the substrate Stretch rate 0% to 60%" technical features to reduce or even eliminate Eliminate the structural weakness of the wire, thereby greatly reducing the risk of wire breakage during stretching, and allowing the wire to have good stretch recovery performance and electrical stability (the impedance change in the stretched state is small).

Furthermore, the stretchable conductive substrate can further include an elastic conductive layer, which can be formed by applying a conductive composition (such as conductive paste) on the circuit layer, which can prevent the metal wire from bending Or the damage of tensile stress, and can suppress the impedance change caused by the bending or stretching of the metal wire.

Furthermore, the electronic device using the stretchable conductive substrate of the present invention can withstand a certain degree of stretching force and bending tension in the length or thickness dimension, even if stretching or bending deformation occurs during use, can also function normally. Therefore, the electronic device has the ability to adapt to different three-dimensional structures without negatively affecting the performance.

The content disclosed above is only a preferred feasible embodiment of the present invention, and does not therefore limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

Z: stretchable conductive substrate

1: Substrate

100: scheduled area

101: First Surface

102: second surface

2: Line layer

21: Conductive contact group

211: Conductive contact

22: Elastic wire structure

Claims (8)

A stretchable conductive substrate, comprising: a substrate having a plurality of predetermined regions; and a circuit layer formed on the substrate, and defining a conductive contact group and at least one in each predetermined region An elastic wire structure connected to the conductive contact group, wherein the elastic wire structure has at least one patterned line segment, and the stretch rate of the elastic wire structure along a length direction of the substrate is 0% to 60 %; wherein, the patterned line segment has at least one first curved portion and at least one second curved portion connected, the curvature of the first curved portion is 0.1mm to 10mm, and the curvature of the second curved portion is 0.5mm to 15mm. A stretchable conductive substrate, comprising: a substrate having a plurality of predetermined regions; and a circuit layer formed on the substrate, and defining a conductive contact group and at least one in each predetermined region An elastic wire structure connected to the conductive contact group, wherein the elastic wire structure has at least one patterned line segment, and the stretch rate of the elastic wire structure along a length direction of the substrate is 0% to 60 %; wherein, the patterned line segment has a plurality of hollow pattern units, and the plurality of hollow pattern units are connected to each other and arranged linearly along the length direction of the substrate; wherein, the shape of each hollow pattern unit is N-gon, N is a positive integer greater than or equal to 3. The stretchable conductive substrate according to claim 2, wherein the stretchable conductive substrate further comprises an elastic conductive layer formed on the circuit layer. The stretchable conductive substrate as claimed in claim 3, wherein the elastic conductive layer is formed from a conductive composition, and based on 100wt% of the conductive group Composites, the conductive composition comprises 45wt% to 65wt% conductive material, the conductive material is selected from the group consisting of gold, palladium, platinum, nickel, copper, copper-coated silver, graphene and carbon nanotubes . The stretchable conductive substrate according to claim 3, wherein each of the hollow pattern units includes a plurality of corner parts and a plurality of straight side parts, and there is a The straight edge portion; wherein, the elastic conductive layer includes a plurality of elastic conductive structures, and each of the plurality of corner portions of the hollow pattern unit has an elastic conductive structure. The stretchable conductive substrate according to claim 3, wherein each of the hollow pattern units includes a plurality of corner parts and a plurality of straight side parts, and there is a The straight side part; wherein, the elastic conductive layer includes a plurality of elastic conductive structures, and each of the plurality of straight side parts of the hollow pattern unit has an elastic conductive structure respectively. The stretchable conductive substrate according to claim 5 or 6, wherein the overlapping ratio between each corner portion or the straight portion and the corresponding elastic conductive structure is 5% to 50%. A stretchable conductive substrate, comprising: a substrate having a plurality of predetermined regions; and a circuit layer formed on the substrate, and defining a conductive contact group and at least one in each predetermined region An elastic wire structure connected to the conductive contact group, wherein the elastic wire structure has at least one patterned line segment, and the stretch rate of the elastic wire structure along a length direction of the substrate is 0% to 60 %; Wherein, the stretchable conductive substrate also includes an elastic conductive layer, the elastic conductive layer is formed on the circuit layer, and includes a plurality of elastic conductive structures; wherein, the patterned line segment has a plurality of a solid pattern unit, a plurality of the solid pattern units are separated from each other by a distance and along the length of the substrate The direction is linearly arranged, and any two adjacent solid pattern units are electrically connected through one of the elastic conductive structures; wherein, the shape of each solid pattern unit is N-gon, and N is greater than or equal to 3 positive integer.

Images