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WO2018131818A1 - Capteur - Google Patents

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Publication number
WO2018131818A1
WO2018131818A1 PCT/KR2017/015121 KR2017015121W WO2018131818A1 WO 2018131818 A1 WO2018131818 A1 WO 2018131818A1 KR 2017015121 W KR2017015121 W KR 2017015121W WO 2018131818 A1 WO2018131818 A1 WO 2018131818A1
Authority
WO
WIPO (PCT)
Prior art keywords
sensing electrode
sensing
electrode
antenna pattern
sensor
Prior art date
Application number
PCT/KR2017/015121
Other languages
English (en)
Korean (ko)
Inventor
김현철
이명원
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170154814A external-priority patent/KR102024608B1/ko
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to EP17891892.6A priority Critical patent/EP3570019A4/fr
Priority to US16/473,212 priority patent/US10996181B2/en
Priority to CN201780082997.1A priority patent/CN110168357B/zh
Publication of WO2018131818A1 publication Critical patent/WO2018131818A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
    • G01N27/07—Construction of measuring vessels; Electrodes therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
    • G01N27/127—Composition of the body, e.g. the composition of its sensitive layer comprising nanoparticles

Definitions

  • the present invention relates to a sensor of the printing method for sensing the change in the impedance of the target material in order to determine the degree of denaturation of salinity, sugar measurement and edible oil.
  • Conventional sensors for determining the degree of denaturation of salinity, sugar measurement and edible oils and fats are generally provided in the form of a terminal.
  • the sensor of the terminal type has the advantage that it is possible to output the measurement and the measurement content without an additional device, but it must be provided with a separate power supply, there is a problem that the volume and weight increases.
  • a vacuum deposition method is generally used to form a conductive region such as a sensing electrode.
  • the vacuum deposition method may bring about deformation of a substrate due to process conditions that need to be formed at a high temperature. This can cause a price increase.
  • An object of the present invention is to solve the problems of the above-described problems of the terminal-type sensor is not light and simple and the problem of high manufacturing cost and manufacturing completeness of the sensor manufactured by the deposition method to replace the sensor manufactured by the printing method .
  • an object of the present invention is to solve a problem of corrosion of a sensing electrode, a durability problem, and the like, which may occur in a printing sensor.
  • a sensing electrode connected to the antenna pattern through a circuit wiring line, the sensing electrode sensing a change in impedance caused by contact of a sensing target material, and a coating electrode stacked on the sensing electrode to remove noise generation of the impedance change.
  • the sensing electrode and the coating electrode provides a sensor each comprising a plurality of conductive particles forming a void and a binder filling the void between the plurality of conductive particles.
  • the conductive particles of the sensing electrode provides a sensor, characterized in that it comprises silver (Ag).
  • the conductive particles of the coating electrode provides a sensor characterized in that it comprises a carbon nanotube (CNT).
  • CNT carbon nanotube
  • the conductive particles of the coating electrode provides a sensor characterized in that it further comprises graphite (Graphite) and carbon black (Carbon black).
  • the graphite and carbon black provides a sensor, characterized in that composed of 10% or more of the total mass of the coating electrode.
  • the binder is a polyethylene oxide (PEO), oleic acid (Oleic acid), acrylate (Acrylate), acetate (Acetate) or epoxy-based resin (Resin) It provides one of the sensors characterized in that.
  • the conductive particles provide a sensor consisting of a combination of flake (sphere) or spherical.
  • the antenna pattern, the circuit wiring and the sensing electrode is made of the same material, is provided on the same layer, the coating electrode is a sensor characterized in that it is provided laminated on the sensing electrode to provide.
  • the sensing electrode includes two electrodes spaced apart from each other, and the coating electrode includes a first region and a second region covering the spaced two electrodes, respectively,
  • the shortest distance of the second region is 10 ⁇ m
  • the thickness of the coating electrode from the top of the sensing electrode is 10 ⁇ m.
  • the sensing electrode includes two electrodes spaced apart, and the distance between the two electrodes provides a sensor, characterized in that 30 ⁇ m more than 3000 ⁇ m.
  • the antenna pattern, the sensing electrode and the circuit wiring provides a sensor having a thickness of 0.5 ⁇ m 15 ⁇ m.
  • the substrate provides a sensor comprising any one of polyethylene terephthalate (PET), polyimide (PI), polystyrene (PS) and polyethylene naphthalate (PEN).
  • PET polyethylene terephthalate
  • PI polyimide
  • PS polystyrene
  • PEN polyethylene naphthalate
  • the antenna pattern has a width of 500 ⁇ m more than 1500 ⁇ m, provides a sensor, characterized in that the adjacent distance of the antenna pattern is 300 ⁇ m more than 700 ⁇ m.
  • a sensor that forms an opening for exposing at least one region of the sensing electrode, and further comprising a passivation layer (surface energy) larger than the substrate.
  • a sensor further comprising a protective layer stacked on the substrate to protect the conductive layer and the passivation layer.
  • a sensor is connected to an antenna pattern and includes a sensing electrode configured to sense a change in impedance caused by contact of a sensing target material, and a conjugated polymer layer including a conductive polymer that is patterned or absorbed by the sensing electrode.
  • a non-conductive substrate and a conductive layer that is electronically printed on one surface of the substrate, the conductive layer, the antenna pattern and circuit wiring for transmitting and receiving a wireless signal with an external device
  • a sensing electrode connected to the antenna pattern and configured to sense a change in impedance due to contact of the sensing target material, wherein the sensing electrode is compressed through a rolling process.
  • the senor at a low temperature has the advantage that it is possible to reduce the probability of failure rate caused by deformation.
  • the senor can be manufactured at a low cost through the electronic printing method.
  • FIG. 1 is a front view of an embodiment of a sensor according to the present invention.
  • FIG. 2 is an exploded perspective view of the sensor of FIG. 1.
  • FIG. 3 is a cross-sectional view taken along the line AA ′ of FIG. 1.
  • FIG. 4 is an enlarged view of a portion of a cross section taken along the line AA ′ of FIG.
  • FIG. 5 is a view illustrating an embodiment in which a sensor of the present invention works with an external device.
  • FIG. 6 is a conceptual diagram illustrating a structure of a circuit wiring, a sensing electrode, a coating electrode, and a passivation layer.
  • FIG. 7 is a flowchart illustrating a method of manufacturing a sensor according to the present invention.
  • FIG. 8 is a flow chart related to another method of manufacturing a sensor according to the present invention.
  • 9 (a) and 9 (b) show a graph of measuring the change in ADC according to the number of measurements for each of the conventional sensor and the sensor related to the present invention.
  • FIG. 1 is a front view of an embodiment of a sensor 100 according to the present invention
  • FIG. 2 is an exploded perspective view of the sensor 100 of FIG. 1.
  • FIGS. 1 and 2 For convenience of description, reference is made to FIGS. 1 and 2 together.
  • the sensor 100 may be composed of a substrate 110, a conductive layer 120, and an insulating layer.
  • the conductive layer 120 may include an antenna pattern 121, a sensing electrode 122, and a circuit wiring 124.
  • Substrate 110 constitutes a non-conductive layer.
  • the substrate 110 serves as a counterpart on which the conductive layer 120 is mounted.
  • the substrate 110 may include a plastic layer 111 and a silica layer 112.
  • the plastic layer 111 is made of flexible plastic (polymer compound or synthetic resin).
  • the plastic may include at least one selected from the group consisting of polyethylene terephthalate (PET), polyimide (PI), polystyrene (PS), and polyethylene naphthalate (PEN).
  • the silica layer 112 may be coated on one surface of the plastic layer 111.
  • the silica layer 112 may be formed between the plastic layer 111 and the conductive layer 120.
  • the silica layer 112 enables fast spreading of the sensing target material 10, in particular a solution, stabilization of the sensing target material 10, and enhanced adhesion strength of the conductive layer 120.
  • the silica layer 112 may have a thickness of several tens to several tens of nm.
  • the conductive layer 120 may be provided on one surface of the substrate 110.
  • the conductive layer 120 may include the antenna pattern 121, the circuit wiring 124, and the sensing electrode 122.
  • the sensing electrode 122 causes an impedance change by contact of the sensing target material 10.
  • the impedance change may refer to a state of the sensing target material 10.
  • sensing electrode 122 Specific features of the sensing electrode 122 will be described later.
  • the antenna pattern 121 transmits and receives a wireless signal with an external device. For example, a function of receiving a sensing command signal of an external device to measure the impedance change of the sensing target material 10 or transmitting the measured impedance change value to the external device.
  • the circuit wiring 124 electrically connects the antenna pattern 121 and the sensing electrode 122 to form a passage for transmitting a signal.
  • the conductive layer 120 may be integrally formed. Meaning that the antenna pattern 121, the sensing electrode 122, and the circuit wiring 124 of the conductive layer 120 is integrally formed is only functionally different from each other, structurally the same material, in the same process in terms of manufacturing process It can mean that it can be formed by. However, in some cases, the coating electrode 123 of the conductive layer 120 may be implemented as a release material or a separate process, unlike other components. Details will be described later.
  • the conductive layers 120 may not be integrally formed, but may be separately formed by separate processes.
  • the conductive layer 120 integrally provided may not be physically separated in principle.
  • the conductive layer 120 may be formed on the substrate 110 by electronic printing.
  • the conductive layer 120 is formed by vacuum deposition.
  • the formation of the conductive layer 120 by the vacuum deposition method has an advantage of having a stable structure, it requires a lot of manufacturing and material costs in that it requires an additional process such as etching after vacuum deposition, and the substrate 110 is made at a high temperature. It can bring about the deformation of the shape.
  • the electronic printing process of the conductive layer 120 may be performed by any one of gravure offset, gravure printing, or screen printing.
  • At least a portion of the conductive layer 120 may be formed of the same layer. At least a portion of the conductive layer 120 formed of the same material and the same layer may mean that the conductive layer 120 is printed on the substrate 110 by one printing process in terms of a manufacturing process. When provided by a single printing process can bring about a simplification of the manufacturing process can minimize the manufacturing cost and time.
  • the region of the conductive layer 120 formed of the same layer may include all or part of the antenna pattern 121, the circuit wiring 124, and the sensing electrode 122. Details will be described later.
  • the antenna pattern 121 transmits and receives a signal with an external device.
  • the external device may mean an electronic device having a communication function.
  • an electronic device having a communication function there are a smartphone, a computer, a digital broadcasting terminal, a PDA, and the like.
  • the antenna pattern 121 generates a DC power by receiving a wireless signal from an external device, and the generated DC power is used to drive the measurement of the sensor 100.
  • the measured impedance difference of the sensing target material 10 may be transmitted to the external device through the antenna pattern 121 again.
  • the sensor 100 may not be provided with a separate power supply unit. This may result in minimization of the light and small size of the sensor 100 and the manufacturing cost.
  • the antenna pattern 121 may be formed in one dimension on one surface of the substrate 110. In particular, it is provided along the outer edge of the substrate 110 to secure the antenna length, it may be provided spirally wound a plurality of times according to the required length. The shape and pattern of the antenna pattern 121 may be variously changed to implement the function of the antenna.
  • the antenna pattern 121 may have a line width of 500 ⁇ m to 1500 ⁇ m in order to have a high inductance.
  • An interval between adjacent lines of the antenna pattern 121 wound a plurality of times may be 300 to 700 ⁇ m to have an appropriate capacitance component.
  • the antenna pattern 121 may include a pattern region for performing an antenna function, and a connection region for electrically connecting the pattern region with the circuit wiring 124 or the sensing electrode 122.
  • the pattern region and the connection region may be provided in the same layer, but may be provided in different layers in order to facilitate electrical connection with other components. To this end, an insulation region may be additionally provided to prevent unintentional electrical connection between different layers. Details will be described later.
  • the antenna pattern 121 may operate as a radiator of a near field communication (NFC) antenna.
  • the NFC antenna may exchange information using a communication standard of 13.56 MHz.
  • the circuit wiring 124 electrically connects the antenna pattern 121 and the sensing electrode 122.
  • the circuit wiring 124 may be electrically connected to the element 150 that controls the sensor 100. That is, the circuit wiring 124 may mean all regions of the conductive layer 120 except for the antenna pattern 121 and the sensing electrode 122.
  • the passivation layer 131 prevents the sensing material 10 from leaking into the substrate 110 region. Therefore, the sensing target material 10 flows into the circuit wiring 124 or the like to prevent the sensor 100 from malfunctioning. In addition, the passivation layer 131 may have a constant height to prevent the flow of the sensing target material 10. The sensing target material 10 may be collected as the sensing electrode 122.
  • the passivation layer 131 may have a surface energy that is greater than that of the substrate 110 so that the sensing target material 10 may form a liquid crystal in the passivation layer 131 area so as not to spread to the substrate 110.
  • the passivation layer 131 may include a first opening 131a exposing at least one region of the sensing electrode 122. Only a portion of the sensing electrode 122 exposed through the first opening 131a may be used.
  • the total length A of the sensing electrode 122 may be 400 to 5000 ⁇ m, and the length exposed through the first opening 131a may be 50 to 5000 ⁇ m. In some cases, the entire length of the sensing electrode 122 and the length exposed through the first opening 131a may be the same, or only a part of the sensing electrode 122 may be exposed through the first opening 131a.
  • the exposure length of the sensing electrode 122 exposed through the first opening 131a affects the resolution of the sensor 100, the print reproducibility according to mass production, and the reliability of the sensor 100. As the exposure length of the sensing electrode 122 exposed through the first opening 131a is shorter, the resolution of the sensor 100 may be improved.
  • Width B of the sensing electrode 122 may be provided in the range of 50 ⁇ 1000 ⁇ m. As the width B of the sensing electrode 122 is narrower, the resolution of the sensor 100 may be improved. However, too narrow a width of the sensing electrode 122 may make the printing process of the conductive layer 120 unstable. For the stable printing process, the width B of the sensing electrode 122 is preferably 50 to 200 ⁇ m.
  • the distance C between the first sensing electrode 122a and the second sensing electrode 122b is 50. It may be provided in the range of ⁇ 3000 ⁇ m.
  • the sensing target material forms a droplet to contact both the first sensing electrode 122a and the second sensing electrode 122b.
  • the distance C between the first sensing electrode 122a and the second sensing electrode 122b is preferably provided within a range of 900 to 1500 ⁇ m.
  • the height D of the sensing electrode 122 may be 700 nm to 15 ⁇ m.
  • the height D of the sensing electrode 122 may affect the thickness of the sensor 100 and the durability and reliability of the sensing electrode 122.
  • the height D of the sensing electrode 122 is lower than 700 nm, a problem of loss of the sensing electrode 122 may occur as the sensing is repeated.
  • the height of the sensing electrode 122 is preferably lower than 15 ⁇ m.
  • the antenna insulation layer 132 and the antenna bridge 140 form a structure for connecting the antenna pattern 121 to the circuit wiring 124.
  • the antenna pattern 121 is spirally wound around the substrate 110 a plurality of times, one end of the antenna pattern 121 must extend in the direction in which the other end of the antenna pattern 121 is provided.
  • the antenna bridge 140 forms such an extended area, and the antenna insulation layer 132 has the antenna bridge 140 and the antenna so that the antenna bridge 140 and the antenna pattern 121 printed by the existing printing process do not interfere with each other. It may be provided between the patterns 121.
  • the protective layer 160 is formed of an insulating material and is disposed to face one surface of the substrate 110 to cover all components mounted on the substrate 110 such as the substrate 110, the conductive layer 120, and the passivation layer 131. It can serve to protect the components electrically and physically.
  • the protection layer 160 may include a second opening 160a exposing the first opening 131a of the passivation layer 131.
  • the device 150 may be mounted on the substrate 110 and electrically connected to the circuit wiring 124.
  • the electronic configuration may include, for example, a power generator, a controller, a converter, a communicator, and the like.
  • the wireless signal received through the antenna pattern 121 is transmitted to the device 150 through the circuit wiring 124.
  • the element 150 may generate the supplied DC power as AC power and input the DC power to the sensing electrode 122.
  • FIG. 3 is a cross-sectional view taken along the line AA ′ of FIG. 1
  • FIG. 4 is an enlarged view of a portion of the cross section along the line AA ′ of FIG. 1.
  • FIGS. 3 and 4 For convenience of description, reference is made to FIGS. 3 and 4 together.
  • the sensing electrode 122 is in direct contact with the sensing target material 10.
  • a material such as platinum (Pt) or gold (Au) may be used for only the sensing electrode 122 region.
  • Pt platinum
  • Au gold
  • This problem may be solved by replacing the sensing electrode 122 with a material such as silver (Ag), copper (Cu), aluminum (Al), or the like.
  • silver, copper, and aluminum may be provided as main components of the sensing electrode 122 among the sensing electrodes 122.
  • the sensing electrode 122 may be formed by combining a conductive particle 1221 such as silver, copper, and aluminum and a binder 1222 formed of an organic material.
  • the conductive particles 1221 may have a spherical shape or flake shape. Flake-shaped conductive particles 1221 may have a relatively high conductivity compared to the spherical case.
  • the conductive particles 1221 may have a size of several tens of nm to 20 ⁇ m to secure a reaction specific surface area.
  • the sensing electrode 122 reacts with the sensing target material 10 to cause an impedance change, and a capacitance component and a resistance component are present in the impedance. If the reaction specific surface area of the conductive particles 1221 is wide, the capacitance component also increases. When the reaction specific surface area of the conductive particles 1221 is wide, oxidation or corrosion of the sensing electrode 122 may be suppressed by the reaction, and the life of the sensor 100 may be extended.
  • the binder 1222 supports the conductive particles 1221.
  • the binder 1222 may serve to improve durability and reliability of the sensing electrode 122.
  • the binder 1222 may be formed of at least one resin selected from the group consisting of polyethylene oxide (PEO), oleic acid, acrylate, acetate, and epoxy resin).
  • PEO polyethylene oxide
  • oleic acid oleic acid
  • acrylate acrylate
  • acetate acrylate
  • epoxy resin epoxy resin
  • the sensing electrode 121 may have pores 1213.
  • the pores 1213 may have a size of several nm to several tens of micrometers.
  • the sensing electrode 121 has pores 1213, the sensor 100 may not be easily damaged by repeated mechanical deformation, thereby improving reliability of the sensor 100.
  • the sensing electrode 122 may form an acute angle with the substrate 110. That is, the edge region of the sensing electrode 122 forms a gentle inclination from the substrate 110 so that the sensing electrode 122 is not easily peeled off due to the bending of the substrate 110.
  • the sensing electrode 122 when the sensing electrode 122 is exposed as it is in contact with the sensing target material 10, the standard reduction potential of materials such as silver, copper, and aluminum is low, which may cause corrosion. Corrosion of the sensing electrode 122 interferes with the contact between the sensing target material 10 and the sensing electrode 122 to cause noise in impedance measurement.
  • the surface area of the sensing material material 10 is reduced, and the reduction of the contact surface area also reduces the accuracy of sensing.
  • the coating electrode 123 may be provided outside the sensing electrode 122.
  • the coating electrode 123 may be additionally provided on the outer surface of the sensing electrode 122 through an electronic printing method to perform a sensitization treatment on the sensing electrode 122.
  • the coating electrode 123 reduces the possibility of noise generation due to the impedance change sensed by the sensing electrode 122. That is, the coating electrode 123 serves to increase the electrical conductivity between the sensing target material 10 and the sensing electrode 122.
  • the coating electrode 123 may be formed in a configuration similar to that of the sensing electrode 122. That is, the conductive particles 1231 and the binder 1232 may be provided in a combined configuration.
  • the conductive particles 1231 of the coating electrode 123 may include carbon nanotubes (CNTs).
  • the binder 1232 of the coating electrode 123 may connect the conductive particles 1231 of the coating electrode 123 to minimize the formation of the voids 1233.
  • the binder of the coating electrode 123 is similar to the binder 1222 of the sensing electrode 122, and may include polyethylene oxide, oleic acid, acrylate, acetate and epoxy. Epoxy) may include at least one resin (resin) selected from the group consisting of.
  • the conductive particles 1231 of the coating electrode 123 may further have graphite. It may include. Graphite serves to increase the conductivity of the sensing electrode 122.
  • the conductive particles 1231 of the coating electrode 123 may include carbon black. Carbon black serves to enhance the durability or wear resistance of the sensing electrode 122.
  • Graphite and carbon black may consist of at least 10% of the total mass of the conductive material of the coating electrode 123.
  • the carbon nanotubes, graphite, and carbon black of the conductive particles 1231 may not perform each function independently, but may be organically linked to each other to perform the functions.
  • the coating electrode 123 may be provided to cover the outer surface of the sensing electrode 122.
  • the pores 1223 of the sensing electrode 122 serve to have durability against mechanical deformation of the sensor 100 as described above, but on the contrary, lower the conductivity of the sensing electrode 122 to prevent accurate impedance measurement.
  • the provision of the coating electrode 123 fills the pores 1223 of the sensing electrode 122 to have a high conductivity to enable accurate impedance measurement.
  • the sensing electrode 122 has two electrodes 122a and 122b spaced apart from and in contact with the sensing target material 10, and the same applies to the coating electrode 123.
  • the interval between the first coating electrode 123a and the second coating electrode 123b may be 10 ⁇ m apart. This value is only an approximate value and does not require that it be exactly 10 ⁇ m.
  • the thickness of the coating electrode 123 that is, the thickness from the top of the sensing electrode 122 to the top of the coating electrode 123 may be 10 ⁇ m or less.
  • the passivation layer 131 described above may be provided outside the coating electrode 123. That is, the sensing electrode 122, the coating electrode 123, and the passivation layer 131 may be sequentially stacked outward from the substrate 110. Therefore, the length condition of the coating electrode 123 may be the same as the length condition of the sensing electrode 122 described above. Therefore, the coating electrode 123 may be exposed to the outside through the first opening 131a by the same length as the sensing electrode 122.
  • a conjugated polymer layer may be used unlike the above-described coating electrode.
  • the conjugated polymer layer may be made of a material such as a conductive polymer (PEDOT: PSS / P3HT).
  • the conjugated polymer layer may be implemented as a patterning process on the sensing electrode 122, or may be subjected to a process of removing after the elapsed time to be absorbed by the sensing electrode 122 in a state where only the entire surface is coated.
  • the sensing electrode 122 may be compressed through a rolling process.
  • the predetermined temperature may be increased, and the sensing electrode 122 may be compressed through the roller while the elevated temperature is maintained.
  • a rolling process may be performed by forming a groove in the roller.
  • FIG 5 is a view illustrating an embodiment in which the sensor 200 of the present invention interworks with an external device 20.
  • the external device 20 may be in various forms, but it will be described as an example of a mobile terminal, especially a smartphone.
  • the sensor 200 receives a wireless signal with the external device 20 through the antenna pattern 221.
  • the sensor 200 generates DC power through the power generation unit 251 to drive the circuit unit 250.
  • the sensor 200 of the present invention does not have a configuration for supplying power by itself, and generates DC power using a wireless signal received from the external device 20, and the controller 252 by the generated DC power.
  • the converter 253, the communicator 254, and the sensing electrode 222 operate.
  • the controller 252 is driven by receiving DC power.
  • the controller 252 generates an AC voltage and inputs it to the sensing electrode 222.
  • the sensing electrode 222 may refer to a concept including the coating electrode 123 (see FIG. 3).
  • the sensing electrode 222 described later may include a coating electrode.
  • the sensing electrode 222 When the sensing electrode 222 reacts with the sensing target material, the sensing electrode 222 causes a change in impedance.
  • the impedance change of the sensing electrode 222 is represented by the change of the AC voltage generated by the controller 252.
  • the material to be sensed may be classified according to the range of output values.
  • the change in AC voltage can be converted into a digital signal.
  • the converter 252 converts a change in AC voltage, which is displayed based on a change in impedance of the sensing electrode 222, into a digital signal.
  • the communication unit 254 transmits the digitized signal to the external device 20 through the antenna pattern.
  • the communication unit 254 may be an NFC tag IC.
  • the external device 20 receives the digitized signal from the sensor 200 to generate, store and manage information.
  • the external device 20 may display information through a display.
  • FIG. 6 is a conceptual diagram illustrating a structure of a circuit wiring 324, a sensing electrode 322, a coating electrode 323, and a passivation layer 331.
  • Sensors are formed by printing, heat drying and curing processes.
  • a process error in particular, an alignment error may occur, and an error may occur due to shrinkage of the substrate even in a heat drying process.
  • the resolution of the sensor may be determined according to the exposure lengths of the first and second sensing electrodes 322a and 322b.
  • the overall length and the exposure length of the first and second sensing electrodes 322a and 322b are very small, 5,000 ⁇ m or less, which greatly increases the probability of generating a process error. Therefore, it is necessary to have a structure that can minimize the process error.
  • the first sensing electrode 322a, the second sensing electrode 322b, the first coating electrode 323a, the second coating electrode 323b, the circuit wiring 324 and the passivation layer 331 are all formed by a printing process. Can be.
  • the passivation layer 331 is disposed to cover the first sensing electrode 322a, the second sensing electrode 322b, the first coating electrode 323a, the second coating electrode 323b, and the circuit wiring 324.
  • the passivation layer 331 is formed after the sensing electrodes 322a and 322b, the coating electrodes 323a and 323b and the circuit wiring 324 are printed. Therefore, a process error may occur during the repetition of the printing process and the heat drying process, and thus the sensing electrodes 322a and 322b or the coating electrodes 323a and 323b may be exposed or hidden unlike the design intention.
  • the sensing electrodes 322a and 322b and the coating electrodes 323a and 323b may be divided into three parts along the length direction. This is defined as a first end 322a1, 322b1, 323a1, 323b1, a second end 322a2, 322b2, 323a2, 323b2 and a central portion 322a3, 322b3, 323a3, 323b3.
  • the passivation layer 331 covers the first ends 322a1, 322b1, 323a1, 323b1 and the second ends 322a2, 322b2, 323a2, 323b2, and the first openings 331a have a central portion 322a3, 322b3, 323a3, 323b3. ).
  • the sensing electrode 322 and the coating electrode 323 are formed longer than the length of the first opening 331a.
  • the first opening 331a may control the exposure length of the sensing electrode 322 and the coating electrode 323. Therefore, the error can be reduced by precisely adjusting the length G of the first opening 331a of the passivation layer 331.
  • the width H of the first opening 331a is wider than the distance between the first electrodes 322a and 323a and the second electrodes 322b and 323b of the sensing electrode 322 or the coating electrode 323 and does not exceed 5000 ⁇ m. It is preferable. This is because, if the width H of the first opening 331a is too wide, the target sensing material that will come into contact with the sensing electrode 322 or the coating electrode 323 may spread without forming droplets.
  • the sensing electrode 322 or the coating electrode 323 The shorter the length of the sensing electrode 322 or the coating electrode 323 exposed through the first opening 331, the narrower the width of the sensing electrode 322 or the coating electrode 323, the two electrodes The wider the interval, the better the resolution.
  • the sensing electrode 322 and the coating electrode 323 are designed only for the purpose of improving resolution, problems such as durability and reliability may occur. Therefore, the structures of the sensing electrode 322 and the coating electrode 323 should be designed in consideration of resolution, durability, and reliability.
  • FIG. 7 and 8 are flowcharts illustrating a manufacturing method of a sensor according to the present invention.
  • the conductive layer is printed on the substrate through a printing process (S100).
  • the conductive layer includes an antenna pattern, sensing electrode, coated electrode and circuit wiring.
  • the antenna pattern, the sensing electrode, and the circuit wiring are made of the same material
  • the antenna pattern, the sensing electrode, and the circuit wiring among the conductive layers may be simultaneously formed by one printing process (S110). This can therefore result in a reduction of material and manufacturing costs.
  • This is defined as a first printing process for convenience. Due to the first printing process, the antenna pattern, the sensing electrode, and the circuit wiring may be provided on the same layer.
  • the coating electrode may be printed on the outer surface of the sensing electrode (S120). Since the coating electrode is made of a material different from the sensing electrode, it may be formed through an additional second printing process.
  • the coating electrode constitutes a release layer stacked on top of the layer on which the sensing electrode is provided.
  • the printing process of the conductive layer uses powder ink or paste.
  • the composition of the powder ink or paste may be 40 to 70 wt% of the conductive particles and 30 to 60 wt% of the organic material including a solvent. This can minimize oxidation and corrosion of the sensing electrode or coating electrode.
  • the conductive particles of the sensing electrode may be made of at least one of silver (Ag), copper (Cu), and aluminum (Al). Meanwhile, the conductive particles of the coating electrode may be made of at least one of carbon nanotubes (CNT), graphite, and carbon black.
  • CNT carbon nanotubes
  • the conductive particles of the sensing electrode or the conductive particles of the coating electrode may have a spherical or flake shape.
  • the solvent for mixing the conductive particles and the binder is at least one selected from the group consisting of acetone, allyl alcohol, acetic acid, acetol, methyl alcohol and benzene. It may include.
  • the process of printing the conductive layer may be any one of a screen, an offset, and gravure.
  • the conductive layer may be cured through heat drying (S200). Heat drying may be performed at 80 ⁇ 200 °C. The solvent described above may be evaporated in the heat drying process. In order to enable a low temperature process of 200 ° C. or less, it is preferable that the conductive particles have a size of several tens of nm to 20 ⁇ m in powder form.
  • the heat drying may be performed after the first printing process for printing the sensing electrode and the second printing process for printing the coating electrode.
  • the coating electrode may be introduced between the pores of the sensing electrode, so that the sensing electrode and the coating electrode may be more tightly coupled.
  • the conductivity is increased, and the high bonding force may prevent the coating electrode from being easily peeled off from the substrate or the sensing electrode.
  • the heat drying process may be performed first, and then the second printing process may be performed on the coating electrode.
  • the passivation layer and the antenna insulation layer may be printed (S300).
  • the passivation layer and the antenna insulation layer may be made of the same material, and thus may be simultaneously formed through one printing process. That is, the passivation layer and the antenna insulating layer may form the same layer on the conductive layer.
  • the printed passivation layer and the antenna insulation layer may undergo a curing process (S400). Curing of the passivation layer and antenna insulation layer may be by ultraviolet (UV).
  • UV ultraviolet
  • the antenna insulation layer may have a plurality of printing processes in order to ensure reliable insulation reliability (S500).
  • the first printed antenna insulating layer may be defined as the first antenna insulating layer
  • the subsequently printed antenna insulating layer may be defined as the second antenna insulating layer.
  • the curing process may be performed once more as in the curing process of the first antenna insulation layer (S600).
  • an antenna insulation layer may be additionally printed in addition to the first antenna insulation layer and the second antenna insulation layer.
  • the same hardening process is performed as the process of forming the first antenna insulation layer or the second antenna insulation layer.
  • the antenna bridge is printed on the antenna insulation layer (S700).
  • the antenna bridge may be made of the same material as the conductive layer.
  • the antenna bridge may be heat dried in the same manner as the conductive layer (S800). Details of the thermal drying conditions are the same as described for the thermal drying of the conductive layer.
  • the device may be bonded to the substrate (S900).
  • the device is electrically connected with the circuit wiring.
  • the protective layer is covered with the substrate to protect the components mounted on the substrate (S1000).
  • 9 (a) and 9 (b) show a graph of measuring the change in ADC according to the number of measurements for each of the conventional sensor and the sensor related to the present invention.
  • the present invention can be applied in whole or in part to all sensors.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

L'invention concerne un capteur comprenant : un substrat non conducteur ; et une couche conductrice imprimée électroniquement sur un côté du substrat, la couche conductrice comprenant : un diagramme d'antenne pour l'émission et la réception d'un signal radio avec un dispositif externe ; une électrode de détection connectée au diagramme d'antenne par l'intermédiaire d'un câblage de circuit pour détecter un changement d'impédance dû au contact avec un matériau cible de détection ; et une électrode de revêtement empilée sur l'électrode de détection pour éliminer une occurrence de bruit du changement d'impédance. En conséquence, la présente invention résout le problème d'un capteur, sous la forme d'un terminal, n'étant pas compact et le problème de coûts de fabrication élevés et de faible qualité de fabrication d'un capteur fabriqué à l'aide d'un procédé de dépôt afin de remplacer un tel capteur par un capteur fabriqué par un procédé d'impression, et résout le problème de corrosion d'une électrode de détection, le problème de durabilité, etc. Cela peut se produire dans le capteur du procédé d'impression.
PCT/KR2017/015121 2017-01-11 2017-12-20 Capteur WO2018131818A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP17891892.6A EP3570019A4 (fr) 2017-01-11 2017-12-20 Capteur
US16/473,212 US10996181B2 (en) 2017-01-11 2017-12-20 Sensor
CN201780082997.1A CN110168357B (zh) 2017-01-11 2017-12-20 传感器

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201762445206P 2017-01-11 2017-01-11
US62/445,206 2017-01-11
KR10-2017-0154814 2017-11-20
KR1020170154814A KR102024608B1 (ko) 2017-01-11 2017-11-20 센서

Publications (1)

Publication Number Publication Date
WO2018131818A1 true WO2018131818A1 (fr) 2018-07-19

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Citations (5)

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Publication number Priority date Publication date Assignee Title
KR20070102858A (ko) * 2006-04-17 2007-10-22 주식회사 인포피아 바이오센서 및 그 제조방법
KR20150011179A (ko) * 2013-07-22 2015-01-30 삼성전자주식회사 바이오 센서
KR20150080224A (ko) * 2013-12-31 2015-07-09 재단법인 다차원 스마트 아이티 융합시스템 연구단 바이오센서 패키지 및 그 제조 방법
KR20160015370A (ko) * 2013-06-07 2016-02-12 라이프스캔 스코트랜드 리미티드 비피복 전극에 대향하는 가용성 전기화학 활성 코팅부를 갖는 전기화학-기반 분석 검사 스트립
KR20160132750A (ko) * 2015-05-11 2016-11-21 삼성전자주식회사 바이오 센서용 전극 구조 및 상기한 전극 구조를 포함하는 바이오 센서

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Publication number Priority date Publication date Assignee Title
KR20070102858A (ko) * 2006-04-17 2007-10-22 주식회사 인포피아 바이오센서 및 그 제조방법
KR20160015370A (ko) * 2013-06-07 2016-02-12 라이프스캔 스코트랜드 리미티드 비피복 전극에 대향하는 가용성 전기화학 활성 코팅부를 갖는 전기화학-기반 분석 검사 스트립
KR20150011179A (ko) * 2013-07-22 2015-01-30 삼성전자주식회사 바이오 센서
KR20150080224A (ko) * 2013-12-31 2015-07-09 재단법인 다차원 스마트 아이티 융합시스템 연구단 바이오센서 패키지 및 그 제조 방법
KR20160132750A (ko) * 2015-05-11 2016-11-21 삼성전자주식회사 바이오 센서용 전극 구조 및 상기한 전극 구조를 포함하는 바이오 센서

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Title
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