CN111129833A - Electrode for connection to electronic circuitry in flexible electronic devices - Google Patents
Electrode for connection to electronic circuitry in flexible electronic devices Download PDFInfo
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- CN111129833A CN111129833A CN201910652608.5A CN201910652608A CN111129833A CN 111129833 A CN111129833 A CN 111129833A CN 201910652608 A CN201910652608 A CN 201910652608A CN 111129833 A CN111129833 A CN 111129833A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
- H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
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Abstract
The invention provides an electrode connected with an electronic circuit in a flexible electronic device, wherein the flexible electronic device comprises a flexible substrate and a conductive layer which is positioned on the surface of the flexible substrate and forms the electronic circuit, the electrode is designed into a conductive part and an electric insulation part, the conductive part is designed into a conductive head part, a conductive tail part and a conductive connecting part which is connected with the conductive head part and the conductive tail part, the area of the connecting end surface of the conductive connecting part connected with the conductive head part is designed to be smaller than that of the connecting end surface of the conductive head part, the electric insulation part is designed at the periphery of the conductive part, and the electric insulation part is fixedly connected on the flexible. The structural design of the electrode enables the conductive head to be fixed, and the conductive head cannot be pulled to be separated from the conductive layer when in use, so that the problems that the electrode is not firm and is easy to fall off are solved, and the service life of the flexible electronic device is prolonged.
Description
Technical Field
The invention belongs to the technical field of electronic devices, and particularly relates to an electrode connected with an electronic circuit in a flexible electronic device.
Background
The flexible electronic technology is an emerging electronic technology, the device has unique flexibility/ductility, at present, the organic/inorganic material electronic device is generally manufactured on a flexible/ductile substrate (such as plastic, a thin metal substrate and the like) to realize, and the flexible electronic technology has wide application prospects in the fields of information, energy, medical treatment, national defense and the like.
The flexible electronic devices mainly include flexible displays, flexible memories, flexible energy storage, flexible sensors, flexible circuits, and the like, and electronic circuits in the flexible electronic devices need materials with good electric conductivity and deformation capability. Some of these materials are in liquid form, such as liquid metals, conductive inks, and the like; some are in the form of slurry, such as graphene slurry, mixed slurry of conductive material and elastomer; some of which are in the form of gels, such as graphite conductive paste, silver paste, etc.; some are in solid form, such as elastic conductive cloth, etc.
In practical applications, electronic circuits in the flexible electronic device are often connected to external devices through external electrodes, one end of which is electrically connected to the electronic circuits in the flexible electronic device, and the other end of which is electrically connected to the external devices. However, when the electronic circuit is in a liquid state, a paste state, a gel state, or the like, the electronic circuit is not easily connected to the external circuit, and the use effect of the flexible electronic device is affected because the electronic circuit is not firmly connected to the external circuit and is easily detached.
Disclosure of Invention
In view of the above technical situation, the present invention provides an electrode connected to an electronic circuit in a flexible electronic device, which has the advantages of firm connection with the electronic circuit and no easy falling off.
The technical scheme of the invention is as follows: an electrode connected with an electronic circuit in a flexible electronic device, wherein the flexible electronic device comprises a flexible substrate, and a conductive layer which is positioned on the surface of the flexible substrate and forms the electronic circuit; one end of the electrode is electrically connected with the electronic circuit, and the other end of the electrode is electrically connected with external equipment, and the electrode is characterized in that:
the electrode comprises a conductive part and an electric insulation part positioned at the periphery of the conductive part;
the conductive part comprises a conductive head part, a conductive tail part and a conductive connecting part for connecting the conductive head part and the conductive tail part;
in the conductive head part, one end connected with the conductive connecting part is an A end; in the conductive connecting part, one end connected with the conductive head part is an A end; the end surface area of the end A of the conductive connecting part is smaller than that of the end surface of the end A of the conductive head part.
One end of the conductive head part is electrically connected with the conductive layer, and the conductive tail part is electrically connected with external equipment;
the electric insulation part is fixedly connected with the flexible substrate.
In the invention, flexibility refers to the property of being capable of deforming such as bending and stretching under the action of external force; elasticity is a flexible one, and refers to a property that can be deformed such as bending and stretching under an external force, and has a certain shape-recovering ability when the external force is removed.
The flexible substrate is a conductive insulating material, and includes but is not limited to a flexible polymer material, such as one or more of thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer rubber poly (TPU), dimethyl siloxane (PDMS), aliphatic aromatic random copolyester (Ecoflex), high polymer resin, silicone, rubber, hydrogel, polyurethane, and polyethylene octene co-elastomer (POE).
The conductive layer is not limited to be made of solid conductive materials, such as solid metal, elastic conductive cloth, etc.; conductive materials in liquid state, such as liquid metal, conductive ink, and the like; a conductive material in a paste form, such as graphene paste, a mixed paste of the conductive material and an elastomer; the conductive material in a gel form is, for example, graphite conductive paste, silver paste, or the like.
The conductive part material is not limited and includes conductive materials in solid state, such as solid metal, elastic conductive cloth, etc.; conductive materials in liquid state, such as liquid metal, conductive ink, and the like; a conductive material in a paste form, such as graphene paste, a mixed paste of the conductive material and an elastomer; the conductive material in a gel form is, for example, graphite conductive paste, silver paste, or the like.
The liquid metal refers to a metal conductive material which is liquid at room temperature, and includes but is not limited to mercury, gallium-indium alloy, gallium-indium-tin alloy, and one or more doped gallium-indium alloy, gallium-indium-tin alloy and the like of transition metal and solid nonmetal elements.
The material of the electrical insulating part is not limited, and is preferably a flexible electrical insulating material, such as a flexible polymer material. The flexible polymer material includes, but is not limited to, one or more of thermoplastic elastomer (TPE), thermoplastic polyurethane elastomer rubber poly (TPU), dimethyl siloxane (PDMS), aliphatic aromatic random copolyester (Ecoflex), polymer resin, silicone rubber, hydrogel, polyurethane, and polyethylene octene co-elastomer (POE).
Preferably, one end of the conductive tail part connected with the conductive connecting part is a B end; in the conductive connecting part, one end connected with the conductive tail part is a B end; the end surface area of the end B of the conductive connecting part is smaller than that of the end B of the conductive tail part.
The fixing mode of the electric insulating part and the flexible substrate is not limited, and comprises fixing through a connecting piece or a connecting material, hot pressing fixing and the like.
In one implementation, the conductive portion is located on a surface of the flexible insulating material. Preferably, the flexible insulating material is integrally connected to the electrically insulating portion.
The flexible electronic device includes, but is not limited to, flexible display, flexible storage, flexible energy storage, flexible sensing, flexible circuit, etc.
Compared with the prior art, the invention designs the electrode into the conductive part and the electric insulation part, the conductive part is designed into the conductive head part, the conductive tail part and the conductive connecting part for connecting the conductive head part and the conductive tail part, the area of the connecting end surface of the conductive connecting part and the conductive head part is designed to be smaller than that of the connecting end surface of the conductive head part, the electric insulation part is designed at the periphery of the conductive part, and the electric insulation part is fixedly connected on the flexible substrate, the conductive head part is fixed by the design, the conductive head part can not be pulled to be separated from the conductive layer in use, and is connected to the conductive tail part through the conductive connecting part, and is electrically connected with external equipment through the conductive tail part, thereby solving the problems that the electrode is not firm and is easy to fall off, and especially when the electronic circuit is in liquid state, slurry state, gel state and the like and is difficult to be firmly connected with, the service life of the flexible electronic device is prolonged.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a capacitive elastic strain sensor according to embodiment 1 of the present invention.
Fig. 2 is a top view of the substrate, the elastic bonding layer, the first conductive layer, and the outer first electrode in the capacitive elastic strain sensor according to embodiment 1 of the present invention.
Fig. 3 is a cross-sectional view of the outer first electrode of fig. 2.
Fig. 4 is a top view of the substrate, the elastic bonding layer, the first conductive layer, and the outer first electrode in the capacitive elastic strain sensor according to embodiment 2 of the present invention.
Fig. 5 is a cross-sectional view of the outer first electrode of fig. 4.
Fig. 6 is a top view of the base, the elastic bonding layer, the first conductive layer, the second conductive layer, the outer first electrode, and the outer second electrode in the capacitive elastic strain sensor according to embodiment 3 of the present invention.
Fig. 7 is a top view of the base, the elastic bonding layer, the first conductive layer, the second conductive layer, the outer first electrode, and the outer second electrode in the capacitive elastic strain sensor according to embodiment 4 of the present invention.
The reference numerals in fig. 1-7 are: 1-elastic textile material, 2-elastic adhesive layer, 3-first conductive layer, 4-elastic dielectric layer, 5-second conductive layer, 6-elastic packaging layer, 7-external first electrode, 8-external second electrode, 9-conductive part, 10-electric insulating part, 11-conductive head part, 12-conductive tail part 12, 13-conductive connecting part and 14-hole.
Detailed Description
The invention will be described in further detail below with reference to the accompanying drawings and examples, which are intended to facilitate the understanding of the invention and are not intended to limit the invention in any way.
Example 1:
in this embodiment, the capacitive elastic strain sensor structure is shown in fig. 1, and is formed by using an elastic textile material 1 as a substrate, and an elastic bonding layer 2, a first conductive layer 3, a second conductive layer 5, an elastic dielectric layer 4, and an elastic encapsulation layer 6. The elastic bonding layer 2 has conductive insulation and is positioned on the surface of the substrate; the first conductive layer 3 is positioned on the surface of the elastomer bonding layer 2, is made of liquid metal and is connected with the external first electrode 7; the elastic dielectric layer 4 has conductive insulation and is positioned on the surface 3 of the first conductive layer; the second conducting layer 5 is positioned on the surface of the elastic dielectric layer 4, is made of liquid metal and is connected with an external second electrode 8; the elastic encapsulating layer 6 is used for encapsulating the first conductive layer 3 and the second conductive layer 5.
Fig. 2 is a top view of an elastic bonding layer, a first conductive layer, and an outer first electrode in a capacitive elastic strain sensor. The top views of the elastic dielectric layer, the second conductive layer and the outer second electrode are the same as those of the first electrode and the second electrode.
In this embodiment, the elastic textile material is made of spandex, the elastomer bonding layer, the elastomer dielectric layer, and the elastomer encapsulation layer are made of polymer resin, and the first conductive layer and the second conductive layer are made of liquid metal GaInSn. As shown in fig. 3, the cross-sectional structure of the first conductive layer is rectangular.
The external first electrode has the same structure as the external second electrode and, as shown in fig. 3, consists of a conductive part 9 and an electrically insulating part 10 located at the periphery of the conductive part. The conductive part material is copper. The electric insulating part is made of flexible insulating material polyimide.
As shown in fig. 3, the conductive portion is composed of a conductive head portion 11, a conductive tail portion 12, and a conductive connecting portion 13 connecting the conductive head portion and the conductive tail portion, an a end surface of the conductive connecting portion 13 is connected to an a end surface of the conductive head portion 11, and a B end surface of the conductive connecting portion 13 is connected to a B end surface of the conductive tail portion 12. The area of the end face a of the conductive header 11 is larger than the area of the end face a of the conductive connection portion 13, and the area of the end face B of the conductive tail 12 is larger than the area of the end face B of the conductive connection portion 13.
As shown in fig. 3, in the present embodiment, the cross section of the conductive head 11 is square, the cross section of the conductive connection portion 13 is rectangular, and the cross section of the conductive tail 12 is square.
In this embodiment, the conductive portion is located on the surface of the flexible insulating substrate, the substrate material is a polyimide surface, and the substrate material and the electrical insulating portion are connected into a whole.
In practical application, the B end of the conductive head of the external first electrode 7 is electrically connected with the liquid metal GaInSn of the first conductive layer, and the shapes of the connected end faces of the two are matched. The electrically conductive tail portion of the outer first electrode 7 is electrically connected to an external device, and the electrically insulating portion of the outer first electrode 7 is fixedly connected to the elastic bonding layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 3, a plurality of holes 14 are provided in the electrically insulating portion, and a connecting member or connecting material is passed through the holes to fixedly connect the electrically insulating portion with the elastic bonding layer.
In practical application, the B end of the conductive head of the outer second electrode 8 is electrically connected with the liquid metal GaInSn of the second conductive layer, and the shapes of the connected end faces of the two are matched. The conductive tail part of the outer second electrode 8 is electrically connected with an external device, and the electric insulation part of the outer second electrode 8 is fixedly connected with the elastic dielectric layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 3, a plurality of holes 14 are provided in the electrically insulating portion, and a connecting member or connecting material is passed through the holes to fixedly connect the electrically insulating portion with the elastic bonding layer.
Example 2:
in this embodiment, the structure of the capacitive elastic strain sensor is substantially the same as that of embodiment 1, except that the cross-sectional structure of the first conductive layer is in the shape of a bone bar as shown in fig. 4.
The structure of the external first electrode is the same as that of the external second electrode, and as shown in fig. 5, the structure is substantially the same as that of fig. 3 in embodiment 1, except that the cross section of the conductive head portion is circular, and one end of the cross section of the conductive connecting portion is circular in shape in order to match the cross section of the conductive head portion.
In practical application, the end B of the conductive head part of the external first electrode is electrically connected with the liquid metal GaInSn of the first conductive layer, and the shapes of the connected end surfaces of the conductive head part and the liquid metal GaInSn are matched. The conductive tail portion of the external first electrode is electrically connected with an external device, and the electrically insulating portion of the external first electrode is fixedly connected with the elastic bonding layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 5, a plurality of holes are disposed on the electrical insulating portion, and the connecting member or connecting material passes through the holes to fixedly connect the electrical insulating portion and the elastic bonding layer.
In practical application, the end B of the conductive head part of the external second electrode is electrically connected with the liquid metal GaInSn of the second conductive layer, and the shapes of the connected end surfaces of the two are matched. The conductive tail part of the external second electrode is electrically connected with external equipment, and the electric insulation part of the external second electrode is fixedly connected with the elastic dielectric layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 5, a plurality of holes are disposed on the electrical insulating portion, and the connecting member or the connecting material passes through the holes to fixedly connect the electrical insulating portion and the elastic dielectric layer.
Example 3:
in this embodiment, the structure of the capacitive elastic strain sensor is substantially the same as that of embodiment 1, except that: the first conductive layer and the second conductive layer are positioned on the same plane without the elastomer dielectric layer; the first conducting layer is aqueous graphene slurry, and the second conducting layer is aqueous graphene slurry; the elastomer adhesive layer and the elastomer encapsulating layer are both selected from dimethyl siloxane (PDMS).
Fig. 6 is a top view of the elastic bonding layer, the first conductive layer, the second conductive layer, and the outer first electrode and the outer second electrode in the capacitive elastic strain sensor.
The structures of the external first electrode and the external second electrode are substantially the same as those of fig. 3 in embodiment 1, except that the conductive part material is liquid metal GaInSn; the electric insulation part is not provided with a hole, and the fixed connection is fixed through hot pressing.
In practical application, the end B of the conductive head part of the external first electrode is electrically connected with the aqueous graphene slurry of the first conductive layer, and the shapes of the connected end surfaces of the conductive head part and the aqueous graphene slurry of the first conductive layer are matched. The conductive tail portion of the external first electrode is electrically connected with an external device, and the electrically insulating portion of the external first electrode is fixedly connected with the elastic bonding layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 6, the fixing is performed by hot pressing.
In practical application, the end B of the conductive head part of the external second electrode is electrically connected with the aqueous graphene slurry of the second conductive layer, and the shapes of the connected end surfaces of the conductive head part and the aqueous graphene slurry are matched. The conductive tail part of the external second electrode is electrically connected with external equipment, and the electric insulation part of the external second electrode is fixedly connected with the elastic bonding layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 6, the fixing is performed by hot pressing.
Example 4:
in this embodiment, the structure of the capacitive elastic strain sensor is substantially the same as that of embodiment 1, except that: the first conductive layer and the second conductive layer are positioned on the same plane without an elastomer dielectric layer, the first conductive layer is a liquid metal GaInSn layer of the interdigital electrode, and the second conductive layer is a liquid metal GaInSn layer of the interdigital electrode; the elastomer adhesive layer and the elastomer encapsulating layer are both selected from dimethyl siloxane (PDMS).
Fig. 7 is a top view of the elastic bonding layer, the first conductive layer, the second conductive layer, and the outer first electrode and the outer second electrode in the capacitive elastic strain sensor.
The structures of the external first electrode and the external second electrode are substantially the same as those of fig. 3 in embodiment 1, except that the conductive portion material is liquid metal GaInSn.
In practical application, the end B of the conductive head part of the external first electrode is electrically connected with the liquid metal GaInSn of the first conductive layer, and the shapes of the connected end surfaces of the conductive head part and the liquid metal GaInSn are matched. The conductive tail portion of the external first electrode is electrically connected with an external device, and the electrically insulating portion of the external first electrode is fixedly connected with the elastic bonding layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 7, a plurality of holes are disposed on the electrical insulating portion, and the connecting member or connecting material passes through the holes to fixedly connect the electrical insulating portion and the elastic bonding layer.
In practical application, the end B of the conductive head part of the external second electrode is electrically connected with the liquid metal GaInSn of the second conductive layer, and the shapes of the connected end surfaces of the two are matched. The conductive tail part of the external second electrode is electrically connected with external equipment, and the electric insulation part of the external second electrode is fixedly connected with the elastic bonding layer. The fixing manner is not limited, and includes fixing by a connecting member or a connecting material, fixing by heat pressing, and the like. In this embodiment, as shown in fig. 7, a plurality of holes are disposed on the electrical insulating portion, and the connecting member or connecting material passes through the holes to fixedly connect the electrical insulating portion and the elastic bonding layer.
The above embodiments are described in detail to explain the technical solutions and advantages of the present invention, and it should be understood that the above embodiments are only specific examples of the present invention and are not intended to limit the present invention, and any modifications and improvements made within the scope of the principles of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An electrode connected with an electronic circuit in a flexible electronic device, wherein the flexible electronic device comprises a flexible substrate, and a conductive layer which is positioned on the surface of the flexible substrate and forms the electronic circuit; one end of the electrode is electrically connected with the electronic circuit, and the other end of the electrode is electrically connected with external equipment, and the electrode is characterized in that:
the electrode comprises a conductive part and an electric insulation part positioned at the periphery of the conductive part;
the conductive part comprises a conductive head part, a conductive tail part and a conductive connecting part for connecting the conductive head part and the conductive tail part;
in the conductive head part, one end connected with the conductive connecting part is an A end; in the conductive connecting part, one end connected with the conductive head part is an A end; the end surface area of the end A of the conductive connecting part is smaller than that of the end surface of the end A of the conductive head part;
one end of the conductive head part is electrically connected with the conductive layer, and the conductive tail part is electrically connected with external equipment;
the electric insulation part is fixedly connected with the flexible substrate.
2. The electrode of claim 1, wherein: in the conductive tail part, one end connected with the conductive connecting part is a B end; in the conductive connecting part, one end connected with the conductive tail part is a B end; the end surface area of the end B of the conductive connecting part is smaller than that of the end B of the conductive tail part.
3. The electrode of claim 1, wherein: the electric insulation part and the flexible substrate are fixed through a connecting piece or fixed through hot pressing.
4. The electrode of claim 1, wherein: the conductive part is positioned on the surface of the flexible insulating material.
5. The electrode of claim 4, wherein: the flexible insulating material is connected with the electric insulating part into a whole.
6. The electrode of claim 1, wherein: the flexible electronic device comprises devices in flexible display, flexible storage, flexible energy storage, flexible sensing and flexible circuits.
7. An electrode according to any one of claims 1 to, wherein: the flexible substrate is made of a conductive insulating material and comprises a flexible high polymer material.
8. An electrode according to any one of claims 1 to, wherein: the material of the conducting layer comprises a solid conducting material, a liquid conducting material, a slurry conducting material or a gel conducting material;
preferably, the conductive material in a solid state includes a solid metal, an elastic conductive cloth;
preferably, the conductive material in a liquid state includes a liquid metal, a conductive ink;
preferably, the conductive material in the form of a paste includes a graphene paste, a mixed paste of the conductive material and an elastomer;
preferably, the conductive material in a gel form includes a graphite conductive paste and a silver paste.
9. An electrode according to any one of claims 1 to, wherein: the material of the conductive part comprises a solid conductive material, a liquid conductive material, a slurry conductive material or a gel conductive material;
preferably, the conductive material in a solid state includes a solid metal, an elastic conductive cloth;
preferably, the conductive material in a liquid state includes a liquid metal, a conductive ink;
preferably, the conductive material in the form of a paste includes a graphene paste, a mixed paste of the conductive material and an elastomer;
preferably, the conductive material in a gel form includes a graphite conductive paste and a silver paste.
10. An electrode according to any one of claims 1 to 9, wherein: the electrical insulation material is a flexible electrical insulation material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652608.5A CN111129833A (en) | 2019-07-18 | 2019-07-18 | Electrode for connection to electronic circuitry in flexible electronic devices |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652608.5A CN111129833A (en) | 2019-07-18 | 2019-07-18 | Electrode for connection to electronic circuitry in flexible electronic devices |
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| CN111129833A true CN111129833A (en) | 2020-05-08 |
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| CN201910652608.5A Pending CN111129833A (en) | 2019-07-18 | 2019-07-18 | Electrode for connection to electronic circuitry in flexible electronic devices |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623899A (en) * | 2020-05-21 | 2020-09-04 | 中山大学 | Film-based capacitive temperature sensor and manufacturing method thereof |
| CN111696701A (en) * | 2020-07-13 | 2020-09-22 | 宁波韧和科技有限公司 | Electrode connected with flexible conductive element |
-
2019
- 2019-07-18 CN CN201910652608.5A patent/CN111129833A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623899A (en) * | 2020-05-21 | 2020-09-04 | 中山大学 | Film-based capacitive temperature sensor and manufacturing method thereof |
| CN111623899B (en) * | 2020-05-21 | 2021-12-03 | 中山大学 | Film-based capacitive temperature sensor and manufacturing method thereof |
| CN111696701A (en) * | 2020-07-13 | 2020-09-22 | 宁波韧和科技有限公司 | Electrode connected with flexible conductive element |
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