CN210075764U - Unidirectional stretchable electronic device - Google Patents
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- CN210075764U CN210075764U CN201821833011.8U CN201821833011U CN210075764U CN 210075764 U CN210075764 U CN 210075764U CN 201821833011 U CN201821833011 U CN 201821833011U CN 210075764 U CN210075764 U CN 210075764U
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Abstract
The utility model provides an one-way stretchable electronic device, including the substrate, be formed with the runner on the substrate, partly be formed with the circuit in the runner, partly the runner intussuseption is filled with non-Newtonian fluid. The unidirectional stretchable electronic device can provide good impact resistance for a circuit while ensuring the bending performance.
Description
Technical Field
The utility model belongs to the technical field of flexible technique and specifically relates to an one-way tensile electron device.
Background
Flexible electronics is gaining wide attention and various aspects of support as a core technology for personalizing wearable medical equipment in the future. Unidirectional stretchable electronic devices (including circuits, sensors, electrodes, chips, etc.) have the advantages of good skin affinity, stretchability, bendability, etc. as aspects of the device. At present, the demand of unidirectional stretchable electronic devices is not satisfied with the functions of bending, stretching and the like, and the research of flexible substrate materials is also an important part in the field of flexible electronics.
The existing flexible substrate material is stretchable and bendable, and has uniform stress distribution and no directionality, so that the stress distribution of an electronic device and a wire is consistent, the flexible substrate and the flexible wire can not be broken under the condition of large-range deformation, but a flexible circuit in the unidirectional stretchable electronic device can be damaged within a small deformation range. This condition results in the flexible circuit becoming saturated with force under the application of an external force and the tensile properties of the wire not being exploited. Secondly, the flexible circuit is thicker than the lead under the impact of external force, and firstly bears more impact force, but the relative energy absorption capacity of the flexible circuit is poor, and the flexible circuit is easy to damage and fail under the impact of external force. In the prior art, in order to ensure that the flexible circuit is not damaged under impact, a thicker flexible protection layer needs to be manufactured, which increases the thickness of the unidirectional stretchable electronic device on one hand and influences the bending performance of the unidirectional stretchable electronic device on the other hand. Therefore, the tendency of flexible circuits to break when subjected to impact has been a major factor limiting the development of unidirectional stretchable electronic devices.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides an one-way tensile electron device, this one-way tensile electron device can provide better shock resistance for the circuit when guaranteeing the bending performance.
The utility model provides an one-way stretchable electronic device, including the substrate, be formed with the runner on the substrate, the runner includes the first runner that extends along the first direction and the second runner that extends along the second direction, first runner reaches second runner intercrossing forms a latticed pattern, is partly be formed with the circuit in the runner, partly the runner intussuseption is filled with non-Newtonian fluid.
Furthermore, the flow channels include a first flow channel extending along a first direction and a second flow channel extending along a second direction, and the first flow channel and the second flow channel are intersected with each other to form a grid-shaped pattern.
Furthermore, the extending directions of the first flow channel and the second flow channel are perpendicular to each other.
Further, in the same flow passage, the flow passage extends in a serpentine shape.
Further, the serpentine flow channel is wave-shaped, square wave-shaped, serpentine, zigzag, sine wave-shaped or S-shaped.
Further, the flow passages extending in a serpentine shape extend in a self-similar shape.
Further, the flow channel extending in a serpentine shape extends in an N-step self-similar shape.
Further, the non-newtonian fluid is one or more of organic polymer solution, ceramic paste and ink, and the organic polymer solution includes one of polyethylene, polyacrylamide, polyvinyl chloride, nylon 6, PVS, celluloid, dacron and rubber solution.
Further, the circuit is a circuit formed by magnetron sputtering, CVD, PVD or 3D printing method.
Further, the circuit is a flexible circuit.
In summary, in the present invention, by forming the flow channel extending in the housing in a meandering manner and filling the flow channel with the non-newtonian fluid, the resistance of the unidirectional stretchable electronic device to the applied force can be made anisotropic, so that the unidirectional stretchable electronic device can maintain its stretching performance in a specific direction while ensuring the bending performance, but can better protect the circuit in other specific directions. In addition, the flow channel can be prepared on the shell in advance, and when some devices need to be prepared, liquid metal can be directly injected into the flow channel, so that the device can be prepared in advance. Furthermore, the arrangement mode not only can enable the substrate to meet the large-scale production requirement, but also can enable the substrate to meet the personalized requirement, and the cost is reduced.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic top view of a unidirectional stretchable electronic device according to a first embodiment of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is an enlarged schematic structural view of a position a of an unidirectional stretchable electronic device according to a second embodiment of the present invention.
Fig. 4 is an enlarged schematic structural view of a position a of the unidirectional stretchable electronic device according to the third embodiment of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the intended purpose of the invention, the following detailed description is given with reference to the accompanying drawings and preferred embodiments.
The utility model provides an one-way electronic device that can stretch, this one-way electronic device that can stretch when guaranteeing the bending performance, can provide better shock resistance for the circuit among the one-way electronic device that can stretch. The flow channel can be prepared on the shell in advance, and when some devices need to be prepared, liquid metal can be directly injected into the flow channel, so that the prefabrication and the editing of the functional devices can be realized.
Fig. 1 is a schematic top view of an electronic device with one-way stretch according to a first embodiment of the present invention, and fig. 2 is an enlarged schematic structural view of a position a in fig. 1. The first embodiment of the present invention provides an unidirectional stretchable electronic device, which includes a substrate 10, a flow channel 20 formed on the substrate 10, a circuit 30 formed in a portion of the flow channel 20, and a non-newtonian fluid 40 filled in a portion of the flow channel 20 (for easy understanding, in fig. 1, the circuit 30 and the non-newtonian fluid 40 are represented by different filling lines).
In the embodiment, since the non-newtonian fluid 40 is filled in the flow channel 20, and the deformation rate of the non-newtonian fluid 40 is in an inverse function relationship with the generated reaction force, the larger the impact force applied to the non-newtonian fluid 40, the larger the force generated to resist the impact, so that when the unidirectional stretchable electronic device is subjected to a larger impact force, the non-newtonian fluid 40 will generate a larger resistance to the impact force, and further protect the circuit 30, and meanwhile, because the non-newtonian fluid 40 has a flowing property, the original performance of the circuit 30 will not be affected in the slower bending and stretching process; further, since the flow channels 20 are formed on the substrate 10, the circuits 30 are formed in one part of the flow channels 20, and the non-newtonian fluid 40 is filled in the other part of the flow channels 20, the same substrate 10 can be applied to different unidirectional stretchable electronic devices, when the unidirectional stretchable electronic devices are assembled, the circuits 30 can be formed at different positions in the flow channels 20 on the same substrate 10 according to requirements, and then the non-newtonian fluid 40 is filled in other positions, so that the requirement of mass production of the substrate 10 can be met, the requirement of customization of the unidirectional stretchable electronic devices can be met, and the cost is saved. Furthermore, the flow channel can be prepared on the shell in advance, and when some devices need to be prepared, liquid metal can be directly injected into the flow channel, so that the device can be prepared in advance.
In the present embodiment, the circuit 30 is a flexible circuit.
Further, in the present embodiment, the flow channel 20 includes a first flow channel 21 extending along a first direction and a second flow channel 22 extending along a second direction, and the first flow channel 21 and the second flow channel 22 are intersected to form a grid pattern. Through the arrangement of the grid-shaped flow channels 20, after the non-newtonian fluid 40 is filled, the non-newtonian fluid 40 can extend in different directions, so that on a plane where the flow channels 20 are located, when an acting force along the extending direction of the flow channels 20 is applied, the flow channels 20 can easily generate tensile or compressive deformation, the applied force can be buffered, the applied force applied to the non-newtonian fluid 40 is further reduced, so that in the direction, the resistance of the non-newtonian fluid 40 to the applied force is small, and the substrate 10 can have certain tensile and compressive properties in the direction; when the unidirectional stretchable electronic device is subjected to an acting force perpendicular to the extending direction of the flow channel 20, the stretching and compression deformation of the flow channel 20 is small, the slowing of the acting force is not obvious, the acting force applied to the non-Newtonian fluid 40 is large, and the non-Newtonian fluid 40 can generate large resistance to the acting force; the non-newtonian fluid 40 can also generate a larger resistance when the unidirectional stretchable electronic device is subjected to a force perpendicular to the plane of the substrate 10, and therefore, the arrangement of the grid-shaped flow channels 20 can enable the non-newtonian fluid 40 to generate an anisotropic resistance according to the requirement of the unidirectional stretchable electronic device, which is more suitable for practical requirements.
Preferably, the extending directions of the first flow channel 21 and the second flow channel 22 are perpendicular to each other, which is similar to the current circuit design form, so as to facilitate the production of large-scale unidirectional stretchable electronic devices, and the first flow channel and the second flow channel may also be in other communication structures, such as a spider-web structure.
As shown in fig. 2, in the present embodiment, on a finer level, the flow channel 20 may extend in a serpentine shape, and in the present embodiment, the flow channel 20 may extend in a wave shape, within the same flow channel 20. At this time, if the unidirectionally stretchable electronic device is subjected to a force along the extending direction of the meandering flow channel 20, for example, a force along the Y direction, due to the presence of the flow channel 20, the non-newtonian fluid 40 is subjected to pressure applied by the side walls of the flow channel 20 in multiple directions, and the non-newtonian fluid 40 has a low resistance and deforms along with the flow channel 20, so that the resistance of the non-newtonian fluid 40 to the force in this direction is further weakened, and the non-newtonian fluid 40 does not have a significant influence on the stretching performance of the unidirectionally stretchable electronic device in this direction; when the unidirectionally stretchable electronic device is subjected to a force perpendicular to the extending direction of the meandering flow channel 20, such as a force in the X direction, in the plane of the flow channel 20, the non-newtonian fluid 40 will have a large resistance against the force, which can protect the circuit 30 against the impact on the circuit 30 inside the housing in the direction. Therefore, the arrangement enables the non-Newtonian fluid 40 to generate more obvious anisotropic resistance force according to the requirements of the unidirectional stretchable electronic device
In this embodiment, the circuit 30 may be made of a simple metal substance such as gold, silver, copper, platinum, or the like, or a liquid alloy such as gallium indium tin alloy, or an inorganic metal oxide such as ITO, AZO, or the like, or an organic conductive material such as PEDOT, conductive silver paste, structural conductive polymer (PAN \ PE, PPY \ PS), or a carbon-based conductive material such as graphene, carbon nanotube, or the like. The circuit 30 may be formed from the above materials by magnetron sputtering, CVD, PVD, 3D printing, and the like. The magnetron sputtering, CVD and PVD are standard semiconductor processes, and have the advantages of accurate preparation process, low cost, batch production and the like, and the 3D printing mode has the advantages of simple process, high reliability and the like.
The substrate 10 may be injection molded from organic polymers such as PDMS, PET, PE (polyethylene), polypropylene (PP), Polyimide (PI), etc., or hydrogel materials such as PLA (polylactic acid), polyacrylamide, etc.
The non-newtonian fluid 40 may be made of organic polymers such as polyethylene, polyacrylamide, polyvinyl chloride, nylon 6, PVS, celluloid, dacron, and rubber solution, or light industrial materials such as ceramic pulp, paper pulp, paint, and ink. The organic polymer solution, the ceramic slurry and the printing ink have adjustable performances such as fluidity, viscosity density and the like, and other functional materials or particles can be added, for example, a magnetic material is added to enable the organic polymer solution, the ceramic slurry and the printing ink to sense an external magnetic field.
In summary, in the present embodiment, by forming the flow channel 20 on the substrate 10 and forming the circuit 30 in a portion of the flow channel 20, a portion of the flow channel 20 is filled with the non-newtonian fluid 40, which can provide a better impact resistance for the circuit 30 in the unidirectional stretchable electronic device while ensuring the bending performance. Furthermore, the arrangement mode not only can enable the substrate 10 to meet the requirement of large-scale production, but also can enable the substrate 10 to meet the requirement of individuation, and the cost is reduced.
Fig. 3 is an enlarged schematic structural view of a position a of an unidirectional stretchable electronic device according to a second embodiment of the present invention. As shown in fig. 3, the one-way stretchable electronic device according to the second embodiment of the present invention is substantially the same as that of the first embodiment, except that in this embodiment, the flow channel 20 extending in a meandering manner is not wavy, as shown in fig. 3, for easy understanding, the shape of the flow channel 20 is simplified by replacing the flow channel 20 with a line in fig. 3, and the flow channel 20 may also be square wave.
It will be appreciated that in other embodiments, the serpentine flow channel 20 may also be, but is not limited to, serpentine, saw tooth, sinusoidal, S-shaped, etc., so long as it exhibits a serpentine extension.
Fig. 4 is an enlarged schematic structural view of a position a of the unidirectional stretchable electronic device according to the third embodiment of the present invention. As shown in fig. 4, the present invention provides an unidirectionally stretchable electronic device substantially the same as the first embodiment, except that in this embodiment, the flow channel 20 extending in a meandering manner is a self-similar shape, and a graph similar to the overall square waveform can be divided in the Y direction of the self-similar square waveform (see the dashed line in fig. 4) in fig. 4, that is, in the vertical direction, so that the flow channel 20 can extend in a meandering manner, and the anisotropy of the acting force of the unidirectionally stretchable electronic device can be adjusted according to the actual situation. As shown in fig. 4, the sheet has a meandering shape in the Y direction, and therefore has a certain tensile property in the Y direction, and also has a good impact resistance under a relatively strong force due to the presence of the non-newtonian fluid 40.
It is understood that the serpentine flow channel 20 may also be, but is not limited to, self-similar serpentine, self-similar zigzag, self-similar wave, etc.
Further, the self-similar shape of the meandering flow channel 20 may be an N-order self-similar shape (N is a positive integer), that is, in a part of the original pattern, the self-similar shape may be further refined into a plurality of patterns similar to the original pattern, as shown in fig. 4, in a part of the original pattern, such as a rectangular frame, a pattern similar to the original pattern may be refined, and thus, may be referred to as a second-order self-similar pattern.
In summary, in the present invention, by forming the flow channel 20 extending in a meandering manner in the housing and filling the flow channel 20 with the non-newtonian fluid 40, the resistance of the unidirectional stretchable electronic device to the applied force can be made anisotropic, so that the unidirectional stretchable electronic device can maintain its stretching performance in a specific direction while ensuring the bending performance, but can better protect the circuit 30 in other specific directions. Furthermore, the arrangement mode not only can enable the substrate 10 to meet the requirement of large-scale production, but also can enable the substrate 10 to meet the requirement of individuation, and the cost is reduced.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent changes without departing from the technical scope of the present invention.
Claims (9)
1. A unidirectionally stretchable electronic device characterized in that: the non-Newtonian fluid flow channel structure comprises a substrate, wherein flow channels are formed on the substrate, the flow channels comprise a first flow channel extending along a first direction and a second flow channel extending along a second direction, the first flow channel and the second flow channel are mutually crossed to form a grid-shaped pattern, a circuit is formed in one part of the flow channels, and a non-Newtonian fluid is filled in one part of the flow channels.
2. A unidirectional stretchable electronic device as recited in claim 1, wherein: the extending directions of the first flow channel and the second flow channel are mutually vertical.
3. A unidirectional stretchable electronic device as recited in claim 1, wherein: in the same flow channel, the flow channel extends in a serpentine shape.
4. A unidirectional stretchable electronic device as recited in claim 3, wherein: the serpentine flow channel is wave-shaped, square wave-shaped, serpentine, zigzag, sine wave-shaped or S-shaped.
5. A unidirectional stretchable electronic device as recited in claim 3, wherein: the flow channels extending in a serpentine shape extend in a self-similar shape.
6. A unidirectional stretchable electronic device as recited in claim 3, wherein: the flow channel extending in a serpentine shape extends in an N-step self-similar shape.
7. A unidirectional stretchable electronic device as recited in claim 1, wherein: the non-Newtonian fluid is one or more materials of organic polymer solution, ceramic paste and printing ink, and the organic polymer solution comprises one of polyethylene, polyacrylamide, polyvinyl chloride, nylon 6, PVS, celluloid, terylene and rubber solution.
8. A unidirectional stretchable electronic device as recited in claim 1, wherein: the circuit is formed by magnetron sputtering, CVD, PVD or 3D printing methods.
9. A unidirectional stretchable electronic device as recited in claim 1, wherein: the circuit is a flexible circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821833011.8U CN210075764U (en) | 2018-11-07 | 2018-11-07 | Unidirectional stretchable electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821833011.8U CN210075764U (en) | 2018-11-07 | 2018-11-07 | Unidirectional stretchable electronic device |
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| Publication Number | Publication Date |
|---|---|
| CN210075764U true CN210075764U (en) | 2020-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821833011.8U Active CN210075764U (en) | 2018-11-07 | 2018-11-07 | Unidirectional stretchable electronic device |
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|---|---|
| CN (1) | CN210075764U (en) |
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