TWI815553B - Circuit structure - Google Patents

Abstract

A circuit structure includes a stretchable substrate and a signal line. The signal line is disposed on the stretchable substrate and includes a first conductive line portion, a second conductive line portion and a conductive elastic part. The first conductive line portion and the second conductive line portion are aligned in a first direction and are disconnected with each other. A front end of the first conductive line portion points to the second conductive line portion, and a back end of the second conductive line portion points to the first conductive line portion. The conductive elastic part is disposed between the first conductive line portion and the second conductive line portion, as well as covers the front end of the first conductive line portion and the back end of the second conductive line portion to electrically connect the adjacent first conductive line portion and the second conductive line portion.

Description

Line structure

The present invention relates to a circuit structure, and in particular to a stretchable circuit structure.

With the advancement of technology, stretchable or flexible products (such as display devices, wearable devices, etc.) are gradually used in daily life to meet the needs of users to bend or stretch at will. However, the circuit structure in current stretchable or flexible products can withstand a limited amount of strain, which can easily lead to breakage of the circuit structure and affect product yield and reliability.

The present invention provides a circuit structure that can increase the maximum amount of strain that the signal line can withstand, thereby improving the yield and reliability of the circuit structure.

The circuit structure of the present invention includes a stretchable substrate and signal lines. The signal line is located on the stretchable substrate and includes a first conductor part, a second conductor part and a conductive elastic part. The first conductor part and the second conductor part are arranged in the first direction and are discontinuous to each other, wherein the front end of the first conductor part points to the second conductor part, and the end of the second conductor part points to the first conductor part. The conductive elastic part is disposed between the first conductor part and the second conductor part and covers the first The front end of the lead part and the end of the second lead part are electrically connected to the adjacent first lead part and the second lead part.

10,20,30,40,50: Line structure

100:Stretchable substrate

110:Signal line

112: First wire part

112a,114a: front end

112b,114b: end

114: Second lead part

120: Conductive elastic part

A-A’: section line

d1,d2,d3: distance

D1: first direction

D2: second direction

D3: Third direction

D4: The fourth direction

F: force

p1,p2,p3,p4: part

s1,s2,s11,s12,s21,s22: depression

W1: Width

W2: line width

FIG. 1A is a schematic top view of a circuit structure according to an embodiment of the present invention.

Figure 1B is a schematic cross-sectional view along section line A-A' of Figure 1A.

FIG. 1C is a schematic top view of the circuit structure of FIG. 1A in a stretched state.

FIG. 1D is another schematic top view of the circuit structure of FIG. 1A in a stretched state.

Figure 2 is a schematic top view of a circuit structure according to another embodiment of the present invention.

Figure 3 is a schematic top view of a circuit structure according to another embodiment of the present invention.

Figure 4 is a schematic top view of a circuit structure according to another embodiment of the present invention.

Figure 5 is a schematic top view of a circuit structure according to another embodiment of the present invention.

FIG. 6 is a relationship diagram between strain and resistance value according to Embodiment 1 and Comparative Examples 1 and 2 of the present invention.

FIG. 1A is a schematic top view of a circuit structure according to an embodiment of the present invention. Figure 1B is a schematic cross-sectional view along section line A-A' of Figure 1A. For clarity of illustration, the conductive elastic portion 120 in FIG. 1A is shown in perspective.

Please refer to FIG. 1A and FIG. 1B , the circuit structure 10 includes a stretchable substrate 100 and a signal line 110 . The stretchable substrate 100 may be made of thermoplastic polyurethane. (Thermoplastic Polyurethane, TPU), polyimide (PI), polycarbonate (PC), polyethylene terephthalate (PET) or other suitable stretchable materials, but The present invention is not limited to this.

The signal line 110 is located on the stretchable substrate 100 . The signal line 110 includes a first conductor part 112, a second conductor part 114 and a conductive elastic part 120. In some embodiments, the first wire part 112 and the second wire part 114 may be a single-layer structure including metal materials such as aluminum, titanium, copper, silver, or alloys thereof, but the invention is not limited thereto. In other embodiments, the first wire portion 112 and the second wire portion 114 may be a multi-layer structure including titanium/aluminum/titanium (Ti/Al/Ti), molybdenum/aluminum/molybdenum (Mo/Al/Mo), or the like.

The first conductor part 112 and the second conductor part 114 are arranged in the first direction D1 and are not continuous with each other. For example, the plurality of first conductor portions 112 and the plurality of second conductor portions 114 are arranged in the first direction D1. The first wire part 112 has a front end 112a and a terminal end 112b, and the second wire part 114 also has a front end 114a and a terminal end 114b. In this embodiment, the front end 112a of the first first wire part 112 points to the first second wire part 114, the end 114b of the first second wire part 114 points to the first first wire part 112, and the second The end 112b of the first wire part 112 points to the first second wire part 114, the front end 112a of the second first wire part 112 points to the second second wire part (omitted), and other subsequent first wires The portions 112 and the second wire portions 114 are alternately arranged in the aforementioned manner and are omitted from illustration in FIG. 1A . The numbers of the first wire portion 112 and the second wire portion 114 can be adjusted according to actual needs.

Specifically, in this embodiment, the first conductor portion 112 and the second conductor portion 114 have the same shape and are sequentially arranged in the first direction D1 with the same bending direction. For example, the first wire portion 112 may have a shape similar to a period of a sine wave from 0° to 360°. The end 112b of the first lead portion 112 is directed toward the linear direction of the front end 112a, that is, the first direction D1. There is a recess s11 toward the second direction D2 and a recess s12 toward the third direction D3 between the front end 112a and the end 112b of the first wire part 112, where the recess s11 is close to the front end 112a and the recess s12 is close to the end 112b. That is to say, the depression s11 may correspond to the trough of the sine wave, the depression s12 may correspond to the crest of the sine wave, and the end 112b of the first wire part 112 is connected to the front end 112a through the depression s12 and the depression s11 in sequence. The first direction D1 intersects the second direction D2 and the third direction D3, and the second direction D2 is opposite to the third direction D3. In some embodiments, the first direction D1 may be perpendicular to the second direction D2 and the third direction D3, but is not limited thereto. Although the first conductor portion 112 having a sinusoidal waveform is used as an example in this embodiment, it is not intended to limit the present invention. In other embodiments, the shape of the first conductor portion 112 may include an S-shape, an arc shape, a square wave V-shape or a U-shape (including a right-angled U-shape or an arc U-shape), etc. The present invention does not This is the limit.

Similarly, the second wire portion 114 may be shaped like a period of a sine wave from 0° to 360°. The end 114b of the second wire portion 114 is directed in the linear direction of the front end 114a, that is, the first direction D1. There is a recess s21 toward the second direction D2 and a recess s22 toward the third direction D3 between the front end 114a and the end 114b of the second wire part 114. The recess s21 is close to the front end 114a and the recess s22 is close to the end 114b. That is to say, the depression s21 may correspond to the trough of the sine wave, the depression s22 may correspond to the crest of the sine wave, and the end 114b of the second wire part 114 is connected to the front end through the depression s22 and the depression s21 in sequence. 114a. Although the second conductor portion 114 having a sinusoidal waveform is used as an example in this embodiment, it is not intended to limit the present invention. In other embodiments, the shape of the second conductor portion 114 may include an S-shape, an arc shape, a square wave shape, a V-shape or a U-shape (including a right-angled U-shape or an arc U-shape), etc. The present invention Not limited to this.

Although the first wire part 112 and the second wire part 114 are shown to have the same shape in this embodiment, the invention is not limited thereto. The first wire part 112 and the second wire part 114 may have different shapes.

The first second conductor part 114 is arranged in the first direction D1 of the first first conductor part 112, and the end 114b of the first second conductor part 114 is located at the front end 112a of the first first conductor part 112. In the fourth direction D4, the fourth direction D4 is opposite to the first direction D1. The end 114b of the first second conductive part 114 is separated from the front end 112a of the first first conductive part 112 by a distance d1, so that the front end 112a of the first first conductive part 112 is separated from the first first conductive part 112 The distance d2 between the ends 112b is greater than the distance d3 between the end 114b of the first second conductor part 114 and the end 112b of the first first conductor part 112. In some embodiments, the sum of distance d1 and distance d3 is approximately equal to distance d2.

In some embodiments, the second first conductor part 112 is arranged in the first direction D1 of the first second conductor part 114, and the end 112b of the second first conductor part 112 is located on the first second conductor part 114. in the fourth direction D4 of the front end 114a of the portion 114. The end 112b of the second first wire part 112 is separated from the front end 114a of the first second wire part 114 by a distance d1. Although in this embodiment, the distance d1 between the end 112b of the second first wire part 112 and the front end 114a of the first second wire part 114 is the same as the distance d1 between the end 112b of the second first wire part 112 and the front end 114a of the first second wire part 114. The distance d1 between the end 114b of the second wire part 114 and the front end 112a of the first first wire part 112 is the same, but the invention is not limited thereto. In other embodiments, the distance between the end 112b of the second first wire part 112 and the front end 114a of the first second wire part 114 is the same as the distance between the end 114b of the first second wire part 114 and the first first wire part 114. The distances between the front ends 112a of the lead portion 112 may be different.

In some embodiments, the front end 112a and the end 112b of the first wire part 112 are aligned with the front end 114a and the end 114b of the second wire part 114 in the first direction D1. That is to say, the front end 112a and the end 112b of the first wire part 112 and the front end 114a and the end 114b of the second wire part 114 are located on the same virtual straight line (not shown in FIG. 1A ), where the virtual straight line is parallel to the first direction D1 and The fourth direction is D4.

In some embodiments, the front end 112a of the first first wire part 112 points to the depression s22 of the first second wire part 114, and the end 114b of the first second wire part 114 points to the first first wire part 112 The recess s11 of the second first conductor part 112 points to the recess s21 of the first second conductor part 114. The other subsequent first conductor parts 112 and second conductor parts 114 are arranged in the aforementioned manner, and as shown in Figure Illustration omitted in 1A. In addition, the front end 112a of the first lead portion 112 and the front end 114a of the second lead portion 114 face the same direction, and the end 112b of the first lead portion 112 and the end 114b of the second lead portion 114 face the same direction, wherein the end 112b and The end 114b faces a different direction than the front end 112a and the front end 114a. For example, the end 114b of the second wire part 114 and the front end 112a of the first wire part 112 face different directions respectively. The portion p2 of the second wire portion 114 near the end 114b and the portion p1 of the first wire portion 112 near the front end 112a are interlaced in the first direction D1. Line structure 10 in unstretched In this state, the first conductor part 112 and the second conductor part 114 are separated from each other and do not contact each other.

The plurality of conductive elastic parts 120 are disposed between the plurality of first conductor parts 112 and the plurality of second conductor parts 114 . For example, the first conductive elastic part 120 covers the front end 112a of the first first conductor part 112 and the end 114b of the first second conductor part 114 to electrically connect the adjacent first first conductor part 112 and the first second conductor part 114; the second conductive elastic part 120 covers the front end 114a of the first second conductor part 114 and the end 112b of the second first conductor part 112 to electrically connect the adjacent ones. The first second conductor part 114 and the second first conductor part 112, and other conductive elastic parts 120 (not shown in FIG. 1A) are arranged in a similar manner and will not be described again. The material of the conductive elastic part 120 may include conductive polymer materials, such as poly(3,4-ethylenedioxythiophene) (PEDOT) or other suitable conductive polymers. In other embodiments, the conductive elastic part 120 may be a polymer material containing conductive material inside, such as polyester material containing silver nanowires. In some embodiments, the first conductive elastic part 120 may cover the portion p2 of the first second conductive part 114 near the end 114b and the part p1 of the first first conductive part 112 near the front end 112a. The portion 120 can cover the portion p3 of the first second wire portion 114 near the front end 114a and the portion p4 of the second first wire portion 112 near the end 112b.

In some embodiments, adjacent conductive elastic portions 120 do not contact each other, thereby reducing the overall resistance of the signal line 110 .

In some embodiments, the line width W2 of the first conductive line portion 112 and the second conductive line portion 114 may be between 1 μm and 6 μm. In some embodiments, the maximum width W1 of the first wire portion 112 or the second wire portion 114 may be between 6 μm and 26 μm. In this Herein, the maximum width W1 of the first conductor part 112 or the second conductor part 114 is defined as the direction perpendicular to the arrangement direction of the first conductor part 112 and the second conductor part 114 (ie, the first direction D1 ) (ie, the second direction D1 ). The maximum width formed by the first conductor portion 112 or the second conductor portion 114 in the direction D2 or the third direction D3).

Because the signal line 110 of the circuit structure 10 of this embodiment includes discontinuous first conductor portions 112 and second conductor portions 114 , and the adjacent first conductor portions 112 and second conductor portions 114 are electrically connected through the conductive elastic portion 120 The connection can increase the maximum strain amount that the signal line 110 can withstand, thereby improving the yield and reliability of the circuit structure 10 .

It should be understood that FIG. 1A only schematically illustrates several first wire portions 112 , second wire portions 114 and conductive elastic portions 120 , but is not intended to limit the present invention. The number of the first conductor part 112, the second conductor part 114 and the conductive elastic part 120 in the signal line 110 can be adjusted according to actual needs.

FIG. 1B is a schematic top view of the circuit structure of FIG. 1A in a stretched state. It must be noted here that the embodiment of FIG. 1B follows the component numbers and part of the content of the embodiment of FIG. 1A , where the same or similar numbers are used to represent the same or similar elements, and descriptions of the same technical content are omitted. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIG. 1B . When the circuit structure 10 is exerted with a force F stretching in the first direction D1 and the fourth direction D4 , the entire circuit structure 10 will stretch laterally. Since the conductive elastic part has elasticity, the first conductor part 112 and the second conductor part 114 will be close to each other after being stretched. For example, the front end 112a of the first first conductor part 112 and the end 114b of the first second conductor part 114 will be close to each other as the circuit structure 10 is stretched, and the first The front end 114a of one second conductor part 114 and the end 112b of the second first conductor part 112 will also approach each other as the circuit structure 10 is stretched. That is to say, the distance d1 between the front end 112a of the first first conductor part 112 and the end 114b of the first second conductor part 114 will decrease as the circuit structure 10 is stretched, and the second first conductor part 114 will decrease. The distance d1 between the end 112b of the portion 112 and the front end 114a of the first second conductor portion 114 will also decrease as the circuit structure 10 is stretched. When the circuit structure 10 is stretched, the first conductor portion 112 and the second conductor portion 114 will be close to each other, thereby reducing the resistance value of the signal line 110 . In other words, the resistance value of the signal line 110 when the circuit structure 10 is stretched is lower than the resistance value of the signal line 110 when the circuit structure 10 is not stretched.

FIG. 1C is another schematic top view of the circuit structure of FIG. 1A in a stretched state. It must be noted here that the embodiment of FIG. 1C follows the component numbers and part of the content of the embodiment of FIGS. 1A and 1B , where the same or similar numbers are used to represent the same or similar elements, and descriptions of the same technical content are omitted. . For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIG. 1C . The main difference between this embodiment and the embodiment of FIG. 1B is that when the circuit structure 10 is stretched, the front end 112 a of the first first conductor part 112 and the end 114 b of the first second conductor part 114 They are in contact with each other, and the front end 114a of the first second lead portion 114 and the end 112b of the second first lead portion 112 are in contact with each other. In other words, the first conductor portion 112 and the second conductor portion 114 that are not originally connected can be stretched by the circuit structure 10 to form the first conductor portion 112 and the second conductor portion 114 that are connected together.

Figure 2 is a top view of a circuit structure according to another embodiment of the present invention. Figure. It must be noted here that the embodiment of FIG. 2 follows the component numbers and part of the content of the embodiment of FIG. 1A , where the same or similar numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to Figure 2. The main difference between the circuit structure 20 of this embodiment and the embodiment of Figure 1A is that: the front end 112a of the first first conductor portion 112 extends into the recess s22, and the end of the first second conductor portion 114 114b extends into the depression s11, and the end 112b of the second first wire portion 112 extends into the depression s21 of the first second wire portion 114. The front end 112a and the end 112b of the first conductor part 112 are not aligned with the front end 114a and the end 114b of the second conductor part 114. That is to say, the front end 112a and the end 112b of the first conductor part 112 are not aligned with the front end 114a of the second conductor part 114. and the end 114b are not located on the same virtual straight line (not shown in FIG. 2 ), where the virtual straight line is parallel to the first direction D1 and the fourth direction D4.

When the circuit structure 20 is exerted a pulling force in the first direction D1 and the fourth direction D4 (not shown), the front end 112a of the first first conductor part 112 and the end of the first second conductor part 114 114b and the front end 114a of the first second conductor part 114 and the end 112b of the second first conductor part 112 will be close to each other as the circuit structure 10 is stretched, which may cause the first first conductor part 112 to The front end 112a and the portion p2 of the first second lead portion 114 close to the end 114b are in contact with each other, and the end 114b of the first second lead portion 114 is in contact with each other and the portion p1 of the first first lead portion 112 close to the front end 112a, similarly Ground, the front end 114a of the first second lead portion 114 may contact each other with the portion p4 of the second first lead portion 112 near the end 112b, and the second first lead portion 112 The end 112b of the first second wire portion 112 may be in contact with the portion p3 of the first second wire portion 114 near the front end 114a.

Figure 3 is a schematic top view of a circuit structure according to another embodiment of the present invention. It must be noted here that the embodiment of FIG. 3 follows the component numbers and part of the content of the embodiment of FIG. 1A , where the same or similar numbers are used to represent the same or similar elements, and descriptions of the same technical content are omitted. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIG. 3 . The main difference between the circuit structure 30 of this embodiment and the embodiment of FIG. 1A is that the shapes of the first conductor part 112 and the second conductor part 114 of the circuit structure 30 are arc-shaped. For example, the shape of the first wire portion 112 is a concave arc shape with a depression s1 facing the third direction D3. The shape of the second wire portion 114 is an upward concave arc shape, with a depression s2 facing the second direction D2. That is to say, the shape of the first wire portion 112 and the shape of the second wire portion 114 have opposite bending directions.

The plurality of first conductor portions 112 and the plurality of second conductor portions 114 are staggered in the first direction D1, so that the front end 112a of the first first conductor portion 112 points to the recess s2 of the first second conductor portion 114, The end 114b of the first second conductor part 114 points to the recess s1 of the first first conductor part 112, and the end 112b of the second first conductor part 112 points to the recess s2 of the first second conductor part 114. The front ends 112a of the two first wire portions 112 point toward the second second wire portion 114. Other subsequent first conductor portions 112 and second conductor portions 114 are alternately arranged in the aforementioned manner. The numbers of the first wire portion 112 and the second wire portion 114 can be adjusted according to actual needs.

In some embodiments, the front end 112a of the first first wire portion 112 may extend Extending into the recess s2, the end 114b of the first second conductor part 114 can extend into the recess s1, and the end 112b of the second first conductor part 112 can extend into the recess s2 of the first second conductor part 114. .

Figure 4 is a schematic top view of a circuit structure according to another embodiment of the present invention. It must be noted here that the embodiment of FIG. 4 follows the component numbers and part of the content of the embodiment of FIG. 1A , where the same or similar numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIG. 4 . The main difference between the circuit structure 40 of this embodiment and the embodiment of FIG. 1A is that the shape of the first conductor part 112 and the second conductor part 114 of the circuit structure 40 is a square wave shape. For example, the first conductor portion 112 is a square wave composed of a plurality of vertical line segments, which extends from the end 112b toward the second direction D2, and passes through the recess s12 toward the third direction D3 and the recess s11 toward the second direction D2. Finally, it extends toward the second direction D2 and is connected to the front end 112a, where the recess s11 is close to the front end 112a, and the recess s12 is close to the end 112b. Similarly, the second conductor portion 114 is a square wave composed of a plurality of vertical line segments, which extends from the end 114b toward the second direction D2, and passes through the recess s22 toward the third direction D3 and the recess s21 toward the second direction D2. , and finally extends toward the second direction D2 and is connected to the front end 114a, where the recess s21 is close to the front end 114a, and the recess s22 is close to the end 114b. That is to say, the first wire portion 112 and the second wire portion 114 have the same shape and bending direction.

In some embodiments, the front end 112a of the first first wire portion 112 can extend into the recess s22, and the end 114b of the first second wire portion 114 can extend into the recess. s11, and the end 112b of the second first wire part 112 can extend into the recess s21 of the first second wire part 114.

Figure 5 is a schematic top view of a circuit structure according to another embodiment of the present invention. It must be noted here that the embodiment of FIG. 5 follows the component numbers and part of the content of the embodiment of FIG. 3 , where the same or similar numbers are used to represent the same or similar elements, and the description of the same technical content is omitted. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to Figure 5. The main difference between the circuit structure 50 of this embodiment and the embodiment of Figure 3 is that the shape of the first conductor portion 112 and the second conductor portion 114 of the circuit structure 50 is a right-angled U-shape, that is, it is composed of multiple A concave or concave figure surrounded by line segments, where two adjacent line segments are perpendicular to each other. For example, the first wire portion 112 has a depression s1 facing the third direction D3, and the second wire portion 114 has a depression s2 facing the second direction D2. That is to say, the shape of the first wire portion 112 is consistent with the shape of the second wire portion 112. The shapes of portions 114 have opposite curvature directions. The plurality of first conductor portions 112 and the plurality of second conductor portions 114 are staggered in the first direction D1 so that the front end 112a of the first first conductor portion 112 points to the recess s2 of the second conductor portion 114. The end 114 b of the second conductor part 114 points to the recess s1 of the first conductor part 112 , and the end 112 b of the second first conductor part 112 points to the recess s2 of the first second conductor part 114 .

FIG. 6 is a relationship diagram between strain and resistance value according to Embodiment 1 and Comparative Examples 1 and 2 of the present invention.

The effectiveness of the present invention is verified below through simulated experimental data, but the present invention is not limited to the following content.

The circuit structure of Embodiment 1 is similar to the circuit structure 10 of FIG. 1A , the material of the stretchable substrate is TPU, and the signal line is composed of a first conductor part, a second conductor part and a conductive elastic part, wherein the first conductor part and The second conductor portion is discontinuous. The length of the signal line is 85μm. The shape of the first conductor part and the second conductor part is a sinusoidal waveform, the line width is 3 μm, the maximum width is 20 μm, and the material is titanium/aluminum/titanium. The conductive elastic part is made of PEDOT.

The circuit structure of Comparative Example 1 is similar to that of Embodiment 1, except that the signal line is a continuous sinusoidal wave metal wire and does not have a conductive elastic portion covering it.

The circuit structure of Comparative Example 2 is similar to that of Embodiment 1, except that the signal line is only a conductive elastic part and does not have a conductive part.

Figure 6 shows the simulation experiment results of the relationship between strain (%) and resistance value (ohms, Ω) in Example 1 and Comparative Examples 1 and 2 under the same tensile conditions.

It can be seen from Figure 6 that the resistance value of the signal line of Comparative Example 1 does not change as the strain increases. In other words, the resistance value of the signal line of Comparative Example 1 is basically constant during the stretching process of the circuit structure. value. The resistance value of the signal line of Comparative Example 2 is higher than that of Comparative Example 1 when the circuit structure is not stretched, and its resistance value increases with the increase of strain during the stretching process of the circuit structure. The resistance value of the signal line of Example 1 when the circuit structure is not stretched is similar to the resistance value of Comparative Example 1, and the resistance value of the signal line of Example 1 changes with the strain during the stretching process of the circuit structure. increases and decreases.

In addition, according to simulation experiment data, when the overall strain of the circuit structure of Comparative Example 1 is 12%, the concentrated strain on the metal conductor part is 4.3%. Similarly, when the overall strain of the circuit structure of Example 1 is 12%, the concentrated stress on the metal conductor part is The strain is 0.23%. It can be seen that compared with Comparative Example 1, the circuit structure of Example 1 can effectively reduce the amount of strain on the metal conductor portion of the signal line, and can maintain good electrical conductivity in either a stretched or unstretched state. sex.

10: Line structure

100:Stretchable substrate

110:Signal line

112: First wire part

112a,114a: front end

112b,114b: end

114: Second lead part

120: Conductive elastic part

d1,d2,d3: distance

D1: first direction

D2: second direction

D3: Third direction

D4: The fourth direction

p1, p2: part

s11,s12,s21,s22: depression

W1: Width

W2: line width

Claims (10)

A line structure consisting of: a stretchable substrate; and A signal line is located on the stretchable substrate and includes: A first conductor part and a second conductor part are arranged in a first direction and are discontinuous to each other, wherein a front end of the first conductor part points to the second conductor part, and an end of the second conductor part Pointed to the first conductor portion; and A conductive elastic part is disposed between the first conductor part and the second conductor part and covers the front end of the first conductor part and the end of the second conductor part to electrically connect the adjacent third conductor part. A conductor part and the second conductor part. The circuit structure of claim 1, wherein the distance between the front end of the first conductor part and an end of the first conductor part is greater than the distance between the end of the second conductor part and the end of the first conductor part distance between. The circuit structure of claim 1, wherein the shapes of the first conductor part and the second conductor part include S-shape, arc-shape, sine wave, square wave, V-shape or U-shape. The circuit structure of claim 1, wherein the first conductor portion has a first recess facing a second direction, and the second conductor portion has a second recess facing a third direction, wherein the first conductor portion has a second recess facing a third direction. The front end of the wire portion points to the second recess, and the end of the second wire portion points to the first recess. The circuit structure of claim 4, wherein the front end of the first wire portion extends into the second recess, and the end of the second wire portion extends into the first recess. The line structure as claimed in claim 4, wherein the second direction is opposite to the third direction. The circuit structure of claim 1, wherein the front end of the first conductor part, the end of the first conductor part, the front end of the second conductor part and the end of the second conductor part are on the first aligned in the direction. The circuit structure of claim 1, wherein when the circuit structure is stretched, the front end of the first conductor part and the end of the second conductor part are close to each other. The circuit structure of claim 1, wherein when the circuit structure is stretched, the front end of the first conductor part and the end of the second conductor part contact each other. The circuit structure of claim 1, wherein the resistance value of the signal line when the circuit structure is stretched is lower than the resistance value of the signal line when the circuit structure is not stretched.

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