WO2011034261A1 - Printed rf label for display - Google Patents

Printed rf label for display Download PDF

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Publication number
WO2011034261A1
WO2011034261A1 PCT/KR2009/008021 KR2009008021W WO2011034261A1 WO 2011034261 A1 WO2011034261 A1 WO 2011034261A1 KR 2009008021 W KR2009008021 W KR 2009008021W WO 2011034261 A1 WO2011034261 A1 WO 2011034261A1
Authority
WO
WIPO (PCT)
Prior art keywords
printing
ink
display
electrochromic
conductive ink
Prior art date
Application number
PCT/KR2009/008021
Other languages
French (fr)
Inventor
Gyoujin Cho
Hwiwon Kang
Junseok Kim
Jinsoo Noh
Yonggil Lee
Yongsoo Park
Namsoo Lim
Jaeyoung Kim
Original Assignee
Paru Co., Ltd.
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
Application filed by Paru Co., Ltd. filed Critical Paru Co., Ltd.
Publication of WO2011034261A1 publication Critical patent/WO2011034261A1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/0723—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/14—Printing or colouring
    • B32B38/145—Printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
    • G06K19/07703—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction the interface being visual
    • 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
    • H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
    • 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
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/248—Supports; Mounting means by structural association with other equipment or articles with receiving set provided with an AC/DC converting device, e.g. rectennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor
    • H05K1/162—Printed circuits incorporating printed electric components, e.g. printed resistor, capacitor, inductor incorporating printed capacitors
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1275—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by other printing techniques, e.g. letterpress printing, intaglio printing, lithographic printing, offset printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2310/00—Treatment by energy or chemical effects
    • B32B2310/08—Treatment by energy or chemical effects by wave energy or particle radiation
    • B32B2310/0806—Treatment by energy or chemical effects by wave energy or particle radiation using electromagnetic radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2519/00—Labels, badges
    • B32B2519/02—RFID tags
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/15—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect
    • G02F1/163—Operation of electrochromic cells, e.g. electrodeposition cells; Circuit arrangements therefor

Definitions

  • the present invention relates to a method for producing radio-frequency (RF) labels that display product authenticity, and particularly, to a method for producing forgery-prevented RF labels and RF logos. More particularly, the present invention relates to a method for producing RF labels and RF logos capable of display via a printing process at low cost.
  • RF radio-frequency
  • labels and logos have been used on paper, plastics or metals in order to display product authenticity and to improve brand awareness and product value.
  • labels and logos allow easy forgery, most products popular to consumers have been frequently forged. Therefore, the labels and logos produced in the above manner are susceptible to forgery, and thus are problematic in displaying product authenticity or condition.
  • a metal such as Cu or Al
  • the metal is laminated on a plastic substrate, and the metal is etched by using a patterned mask to form an antenna. Otherwise, vacuum deposition of a metal thin film is performed to form an antenna, Si-based chips are bonded thereto, and then a simple liquid crystal display is added thereto.
  • the above-mentioned methods require a large number of processes and expensive equipment is needed to carry out such processes, they have poor cost-efficiency and time-efficiency as a whole.
  • An object of the present invention is to provide a printing method for producing RF labels and RF logos at low cost, the method being capable of substituting for the conventional methods using Si semiconductor-based processes and devices requiring high cost.
  • an object of the present invention is to provide a method for producing an antenna, a rectifier, an IC chip and a display for RF labels by way of a printing process. More particularly, an object of the present invention is to provide a method for producing RF labels and RF logos in a large amount at low cost via a printing process so that the RF labels and logos may substitute for the existing labels and logos.
  • It is another object of the present invention is to provide RF labels and RF logos capable of displaying moving pictures through an electrochromic display and a polymer light emitting diode.
  • the present invention provides a method for producing RF labels and RF logos capable of display at low cost via a printing process.
  • the method for producing RF labels and RF logos capable of display includes:
  • the method for producing RF labels and RF logos capable of display includes:
  • an electrode capable of display or a light emitting diode with an electrochromic conductive ink containing an electrochromic organic material and having a surface resistance of 10-500 ⁇ /sq, after printing the rectifier, to form an electrochromic display section.
  • the present invention provides a method for producing RF labels and RF logos at low cost via a roll-to-roll gravure printing system.
  • the RF label disclosed herein is obtained in a time-efficient manner by using a printing process.
  • the method for producing RF labels and RF logos disclosed herein minimizes the manufacturing cost not by using silicon semiconductor chips directly but by printing the chips on plastic substrates.
  • the RF labels and RF logos are attached easily to various types of objects.
  • RF labels and RF logos capable of display of moving pictures are obtained via a printing process, it is possible for RF labels to have improved information display capabilities and to attract consumer interest.
  • Fig. 1 is a schematic view illustrating a roll-to-roll 10-color gravure printing system and a lamination system.
  • Fig. 2 is a circuit diagram of a printed RF label.
  • Fig. 3 is a circuit diagram of an RF label capable of display of moving pictures.
  • Fig. 4 illustrates a design of a printed RF label.
  • Fig. 5 is a graph showing the I-V measurements of a roll-to-roll printed diode.
  • Fig. 6 is a photographic view of an RF label as viewed through a power-off RF reader.
  • Fig. 7 is a photographic view of an RF label as viewed through a power-on RF reader.
  • Printing methods that may be used in the present invention include screen printing, inkjet printing, offset printing, flexographic printing and roll-to-roll gravure printing.
  • Fig. 1 is a schematic view illustrating a roll-to-roll gravure printing process for printing RF labels and RF logos at low cost. Particularly, Fig. 1 illustrates a 10-color printing process and a final lamination process, including a plastic film substrate section 101, a printing section (ink cup/printing plate) 102, a drying section 103, a lamination film section 104, a lamination section 105 and a finished product section 106.
  • the gravure printing process as shown in Fig. 1 is described for illustrative purposes only and not intended to limit the scope of the present invention.
  • Fig. 2 is a circuit diagram of a printed RF label and RF logo. As shown in Fig. 2, an antenna, a diode, a capacitor and a display section are required basically to form a printed RF label in accordance with the present invention.
  • Fig. 3 is a circuit diagram of a printed RF label and RF logo capable of display of moving pictures. It is possible to maximize the information storage capability of an RF label by printing an RF label and RF logo capable of display of moving pictures via a roll-to-roll printing process, so that the information included in the RF label and RF logo may be displayed through moving pictures.
  • a control circuit that controls the electrochromic display section is required in addition to the antenna, diode, capacitor and display section to realize moving pictures.
  • the term moving pictures means that the displayed logos move or cause a change in shape.
  • the control circuit that controls the display section to enable execution of moving pictures includes any control circuit that enables execution of moving pictures.
  • the control circuit may include an oscillator and a switch for the selective voltage (current) application.
  • Fig. 4 is a design image of an RF label and RF logo to be printed by a roll-to-roll gravure printing system.
  • an antenna is printed with a conductive ink containing conductive metal nanoparticles and having a resistivity of 1-100 m ⁇ /sq/mil.
  • the conductive ink used for printing an antenna in accordance with the present invention contains conductive metal nanoparticles and has a resistivity of 1-100 m ⁇ /sq/mil.
  • the conductive ink is one containing conductive metal nanoparticles selected from gold, silver, copper and aluminum having an average particle size of 10-100 nm and is capable of low-temperature firing. Methods for preparing such conductive inks are described specifically in Korean Patent Application No. 10-2007-0079897. More particularly, the conductive ink contains the conductive metal nanoparticles in an amount of 5-60 wt% so as to show electrical conductivity and to perform as an antenna. To improve the performance of an antenna, the conductive ink has a resistivity of 1-100 m ⁇ /sq/mil, preferably 1-50 m ⁇ /sq/mil.
  • a capacitor is printed on the antenna printed as described above with an organic-inorganic hybrid ink, and a diode is printed with an active ink, thereby forming a rectifier.
  • the printing of the rectifier is carried out by such a method as described in Korean Patent Application No. 10-2007-0079912.
  • the capacitor included in the capacitor is printed with a dielectric ink with a high dielectric constant, such as an ink obtained by the method as described in Korean Patent Application No. 10-2007-0079940.
  • the organic-inorganic hybrid ink includes a resin selected from polymethyl methacrylate (PMMA) and epoxy, and a metal oxide selected from barium titanate (BaTiO 3 ) and aluminum oxide (Al 2 O 3 ).
  • the active ink includes a resin selected from polypyrrole, polyaniline, polythiophene and poly-3-hexylthiophene (P3HT), and nanoparticles having an average particle diameter of 5-50 nm or nanowires having an average particle diameter of 50-150 nm and a length of 1-4 ⁇ m, which are selected from ZnO, Al-doped ZnO, B-doped ZnO, Co-doped ZnO, InP, InAs and Si.
  • a resin selected from polypyrrole, polyaniline, polythiophene and poly-3-hexylthiophene (P3HT)
  • nanoparticles having an average particle diameter of 5-50 nm or nanowires having an average particle diameter of 50-150 nm and a length of 1-4 ⁇ m, which are selected from ZnO, Al-doped ZnO, B-doped ZnO, Co-doped ZnO, InP, InAs and Si.
  • an electrochromic display is printed with an electrochromic conductive ink containing an electrochromic organic material and having a surface resistance of 10-500 ⁇ /sq, or a polymer light emitting diode is printed with poly(p-phenylene vinylene) (PPV) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] (MEHPPV) so as to realize electrochromic display.
  • PPV poly(p-phenylene vinylene)
  • MEHPPV poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene]
  • a working electrode is printed with an electrochromic conductive ink
  • a logo for displaying information is printed with a polymeric resin
  • a gel type and solid electrolyte is printed with an electrolyte ink
  • a counter electrode is further printed with the electrochromic conductive ink, so that an electrochromic display may be formed in the above operation.
  • an electrode is formed with a conductive ink
  • a logo-shaped polymer light emitting diode PLED
  • PPV poly(p-phenylene vinylene)
  • MEHPPV poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene]
  • PEODT conductive ink
  • the electrochromic conductive ink includes a conductive resin selected from poly(3,4-ethylenedioxythiophene) (PEODT), polyaniline (PANI), 2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene (MEHPPV), polyphenylene vinylene (PPV), polypyrrole and polythiophene.
  • the electrochromic conductive ink is used to print an electrochromic section.
  • the conductive ink used in this manner suitably has a surface resistance of 10-500 ⁇ /sq, preferably 20-200 ⁇ /sq.
  • the electrochromic display printed as described above has a driving voltage of 0.5-10 V, preferably 1-7 V, and a driving current of 100 ⁇ A-50 mA, preferably 500 ⁇ A-20 mA.
  • the diode printed as described above may be driven at a constant voltage of 5 V or higher and a current of 100 ⁇ A-50 mA.
  • the diode is schematically shown in Fig. 5.
  • an electrolyte ink may be used to activate the electrochromic conductive ink.
  • the electrolyte ink includes a resin selected from polyvinyl alcohol, polyacrylonitrile, polyacrylic acid, polymethyl methacrylate (PMMA), acrylic resin and polyethylene oxide (PEO), and an electrolyte selected from LiNbO 3 , LiN, LiClO 4 , LiAl 2 O 3 , Ta 2 O 5 , ZrO 2 and MgF 2 .
  • the electrolyte is used in an amount of 0.01 wt%-5 wt%, preferably 0.05 wt%-2 wt%.
  • the method may include a 10-color printing process, which includes: printing an antenna with a conductive ink; printing a capacitor of a rectifier with an organic-inorganic hybrid ink; printing a diode of a rectifier with an active ink; printing a Schottky diode electrode with a conductive ink; printing a working electrode capable of display for an electrochromic display with an electrochromic conductive ink; printing a logo for displaying information with a polymeric resin; printing a gel type electrolyte for driving electrochromism with an electrolyte ink; printing a counter electrode of an electrochromic display with an electrochromic conductive ink; printing a final interconnection, which connects the front end of the antenna with the terminal end of the antenna, with a conductive ink; and a final lamination.
  • a method for printing a light emitting diode by using the roll-to-roll gravure printing system as shown in Fig. 1 may include: printing an antenna with a conductive ink; printing a capacitor of a rectifier with an organic-inorganic hybrid ink; printing a diode of a rectifier with an active ink; printing a Schottky diode electrode with a conductive ink; printing an electrode with a conductive ink; printing a polymer light emitting diode (PLED) in the form of a logo with poly(p-phenylene vinylene) (PPV) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] (MEHPPV); printing a counter electrode with PEDOT; and printing a final interconnection, which connects the front end of the antenna with the terminal end of the antenna, with a conductive ink.
  • PLED polymer light emitting diode
  • the electrochromic display or polymer light emitting display RF labels printed in accordance with the present invention show no information of the RF label when viewed through a power-off RF reader.
  • the information of the RF label is displayed when viewed through a power-on RF reader.
  • a control circuit controlling the electrochromic display may be added to realize moving pictures.
  • the control circuit includes an antenna, a diode, a capacitor, an oscillator, a DC/AC power switch and a moving picture display section.
  • aqueous silver ion solution 0.3 g of AgNO 3 is dissolved into 10 ml of distilled water to form an aqueous silver ion solution.
  • 0.02 g of polypyrrolidone (number average molecular weight 50,000) is added thereto and the resultant mixture is agitated in a homogenizer to obtain uniform dispersion.
  • 0.5 g of an aqueous 10% hydrazine solution is added slowly to the resultant dispersion and agitation is carried out for additional 3 hours to obtain a dark green solution.
  • titanium dioxide having an average particle size of 200 nm is dissolved into 10 ml of ethanol as an organic solvent and dispersed by ultrasonification.
  • 2 g of 3-trimethoxysilylpropyl methacrylate is added thereto, agitated at 70 °C for 1 hour, and dried in an oven at 80 °C for 2 hours.
  • 0.4 g of the titanium dioxide particles dried as described above are introduced into 10 g of N-methylpyrrolidone (NMP) and dispersed again.
  • NMP N-methylpyrrolidone
  • MMA methyl methacrylate
  • the resultant mixture is heated to 60 °C to allow polymerization of MMA on the surface of the titanium dioxide particles. Then, 3 g of N-methylpyrrolidone (NMP) is added to the final mixture to obtain a dielectric ink having a viscosity of 350 cP.
  • NMP N-methylpyrrolidone
  • a hybrid ink of InP nanoparticles (average particle diameter 30 nm) with PEDOT is used.
  • the hybrid ink includes 1 wt% PEDOT solution and INP nanoparticles in a ratio of 10:1).
  • An Al ink (60 wt% of 10 ⁇ m Al particles, 10 wt% of ethyl cellulose, 29.5 wt% of butyl carbitol), 0.5 wt% of an amine-based dispersant, and 0.5 wt% of an aliphatic amine-based antioxidant are mixed and the mixture is milled in a ball mill for 12 hours.
  • ethylene dioxythiophene and 7 parts by weight of poly(4-styrenesulfonic acid) are introduced into 100 parts by weight of distilled water and dispersed by ultrasonification.
  • an initiator (ammonium persulfate available from Daejung Chemicals & Metals Co.Ltd.) is further introduced thereto to perform a reaction for 24 hours.
  • 90 parts by weight of PEDOT washed with distilled water is mixed with 7 parts by weight of diethylene glycol and 3 parts by weight of distilled water to obtain an electrochromic conductive ink.
  • an anionic surfactant sodium dodecylsulfate
  • 0.1 g of single-walled carbon nanotubes with an average length of 10 ⁇ m and an average diameter of 2 nm are added and dispersed.
  • 0.0864 mol of 2,2-azobisisobutyronitrile is introduced as an initiator and a reaction is performed in a reaction tank at 60 °C under agitation for 12 hours to obtain an ink for an active layer.
  • An RF tag is obtained by using a roll-to-roll 10-color gravure printing system.
  • the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an antenna.
  • the dielectric ink (viscosity 300 cP) with a high dielectric constant obtained from Preparation Example 2 is used to print a capacitor of a rectifier.
  • the active ink obtained from Preparation example 3 is used to print a diode of a rectifier.
  • the Al ink obtained from Preparation Example 4 is used to print an electrode of a Schottky diode.
  • the conductive ink obtained from Preparation Example 5 is used to print a working electrode of an electrochromic display.
  • polysilicone (DLE 7645 available from Dong Yang Silicone Co.) is used to print a logo for displaying information.
  • a gel type electrolyte is printed with the electrolyte ink obtained from Preparation Example 6 to facilitate electrochromism.
  • the conductive ink obtained from Preparation Example 5 is used to print a counter electrode of an electrochromic display.
  • the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as a final interconnection that connects the front end of the antenna with the terminal end of the antenna.
  • Example 1 is repeated, except that the ink used in the fifth printing and the eighth printing is polyaniline (PANI, dispersed into m-cresol at a concentration of 1 wt%). Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
  • PANI polyaniline
  • Example 2 is repeated, except that the electrolyte ink used in the seventh printing is prepared by mixing 3 wt% of polyacrylic acid, 0.5 wt% of LiClO 4 and 96.5 wt% of distilled water. Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
  • Example 1 is repeated, except that the electrochromic display section is replaced by a polymer light emitting diode.
  • a process for printing RF labels and logos using a polymer light emitting diode is carried out as follows.
  • the Al ink obtained from Preparation Example 4 is used to print a working electrode.
  • a PPV ink (30 wt% of PPV, 68 wt% of toluene and 2 wt% of a silane group-containing coupling agent (3-glycidoxyprpyltrimethoxysilane)) is used to print a polymer light emitting diode.
  • a logo including information is printed upon the printing of PPV ink.
  • the PEDOT ink obtained from Preparation Example 5 is used to print a counter electrode.
  • the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as the final interconnection that connects the front end of the antenna with the terminal end of the antenna.
  • Example 4 is repeated, except that the rectifier section is replaced by a PLED.
  • the printing process is carried out as follows.
  • the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an antenna.
  • the Al ink obtained from Preparation Example 4 is used to print an electrode.
  • a PPV ink (30 wt% of PPV, 68 wt% of toluene, 2 wt% of a silane group-containing adhesion enhancer (available from Aldrich Co.)) is used to print a polymer light emitting diode.
  • a logo including information is printed upon the printing of PPV ink.
  • the PEDOT ink obtained from Preparation Example 5 is used to print a counter electrode.
  • the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as a final interconnection that connects the front end of the antenna with the terminal end of the antenna.
  • Example 1 is repeated, except that the roll-to-roll gravure printer is replaced by an offset printer to print an RF label and RF logo. Inks adequate for an offset printing process are used. After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
  • Example 1 is repeated, except that the roll-to-roll gravure printer is replaced by a screen printer to print an RF label and RF logo. Inks adequate for a screen printing process are used. After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
  • Example 5 is repeated, except that the roll-to-roll gravure printer is replaced by an offset printer to print an RF label and RF logo. Inks adequate for an offset printing process are used. After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
  • a roll-to-roll 10-color gravure printing system is used to produce an RF tag.
  • the Ag nanoink (viscosity 250 cP) is used to print an antenna.
  • the dielectric ink (viscosity 300 cP) with a high dielectric constant obtained from Preparation Example 2 is used to print a capacitor required for a rectifier, an oscillator and an insulation layer required for a transistor included in a DC/AC power switch.
  • the active ink is used to print a diode of a rectifier.
  • the Al ink obtained from Preparation Example 4 is used to print an electrode of a Schottky diode.
  • the electrochromic conductive ink obtained from Preparation example 5 is used to print a working electrode of an electrochromic display.
  • polysilicone (DLE 7645 available from Dong Yang Silicone Co., Ltd.) is used to print a logo for displaying information.
  • a gel type electrolyte is printed with the electrolyte ink obtained from Preparation Example 6 to facilitate electrochromism.
  • the conductive ink obtained from Preparation Example 5 is used to print a counter electrode of an electrochromic display.
  • the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as a final interconnection that connects the front end of the antenna with the terminal end of the antenna, and a drain source of a transistor included in an oscillator and a DC/AC power switch.
  • active layers included in the oscillator and the DC/AC power switch are printed. The active layers use the active layer ink as disclosed in Korean Patent Application No. 10-2008-0039122 and the ink obtained from Preparation Example 7.
  • the present invention provides a method for producing RF labels and RF logos at low cost via a roll-to-roll gravure printing system.
  • the RF label disclosed herein is obtained in a time-efficient manner by using a printing process.
  • the method for producing RF labels and RF logos disclosed herein minimizes the manufacturing cost not by using silicon semiconductor chips directly but by printing the chips on plastic substrates.
  • the RF labels and RF logos are attached easily to various types of objects.
  • RF labels and RF logos capable of display of moving pictures are obtained via a printing process, it is possible for RF labels to have improved information display capabilities and to attract consumer interest.

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  • Computer Hardware Design (AREA)
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  • Crystallography & Structural Chemistry (AREA)
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Abstract

Provided is a method for producing radio-frequency (RF) labels that display product authenticity, and particularly, a method for producing forgery-prevented RF labels and RF logos. The RF labels display information by driving a simple display printed thereon for displaying information through the conversion of 13 MHz-960 MHz AC signals of an RF reader into DC signals via a printed rectifier.

Description

PRINTED RF LABEL FOR DISPLAY
The present invention relates to a method for producing radio-frequency (RF) labels that display product authenticity, and particularly, to a method for producing forgery-prevented RF labels and RF logos. More particularly, the present invention relates to a method for producing RF labels and RF logos capable of display via a printing process at low cost.
In general, labels and logos have been used on paper, plastics or metals in order to display product authenticity and to improve brand awareness and product value. However, because such labels and logos allow easy forgery, most products popular to consumers have been frequently forged. Therefore, the labels and logos produced in the above manner are susceptible to forgery, and thus are problematic in displaying product authenticity or condition.
In the case of an RF label using Si semiconductor technology known in the art, a metal, such as Cu or Al, is laminated on a plastic substrate, and the metal is etched by using a patterned mask to form an antenna. Otherwise, vacuum deposition of a metal thin film is performed to form an antenna, Si-based chips are bonded thereto, and then a simple liquid crystal display is added thereto. However, since the above-mentioned methods require a large number of processes and expensive equipment is needed to carry out such processes, they have poor cost-efficiency and time-efficiency as a whole.
To substitute existing labels with RF labels and to allow wide application of RF labels, it is required to produce RF labels at low cost. To accomplish this, the above-mentioned problems related with Si semiconductor technology have to be solved. In addition, it is required that such RF labels be produced at low cost and be disposable so as to overcome the problem of low cost-efficiency and to meet the requirements of consumers.
An object of the present invention is to provide a printing method for producing RF labels and RF logos at low cost, the method being capable of substituting for the conventional methods using Si semiconductor-based processes and devices requiring high cost. In other words, an object of the present invention is to provide a method for producing an antenna, a rectifier, an IC chip and a display for RF labels by way of a printing process. More particularly, an object of the present invention is to provide a method for producing RF labels and RF logos in a large amount at low cost via a printing process so that the RF labels and logos may substitute for the existing labels and logos.
It is another object of the present invention is to provide RF labels and RF logos capable of displaying moving pictures through an electrochromic display and a polymer light emitting diode.
To achieve the objects of the present invention, the present invention provides a method for producing RF labels and RF logos capable of display at low cost via a printing process.
Particularly, the method for producing RF labels and RF logos capable of display includes:
printing an antenna with a conductive ink containing conductive metal nanoparticles and having a resistivity of 1-100 mΩ/sq/mil;
printing a capacitor with an organic-inorganic hybrid ink and printing a diode with an active ink, after printing the antenna, to form a rectifier; and
printing an electrochromic display section with an electrochemical conductive ink containing an electrochromic organic material and having a surface resistance of 10-500 Ω/sq, after printing the rectifier.
More particularly, the method for producing RF labels and RF logos capable of display includes:
printing an antenna with a conductive ink containing conductive metal nanoparticles and having a resistivity of 1-100 mΩ/sq/mil;
printing a capacitor with an organic-inorganic hybrid ink and printing a diode with an active ink, after printing the antenna, to form a rectifier; and
printing an electrode capable of display or a light emitting diode with an electrochromic conductive ink containing an electrochromic organic material and having a surface resistance of 10-500 Ω/sq, after printing the rectifier, to form an electrochromic display section.
The present invention provides a method for producing RF labels and RF logos at low cost via a roll-to-roll gravure printing system.
The RF label disclosed herein is obtained in a time-efficient manner by using a printing process. The method for producing RF labels and RF logos disclosed herein minimizes the manufacturing cost not by using silicon semiconductor chips directly but by printing the chips on plastic substrates. The RF labels and RF logos are attached easily to various types of objects. In addition, since RF labels and RF logos capable of display of moving pictures are obtained via a printing process, it is possible for RF labels to have improved information display capabilities and to attract consumer interest.
The above and other objects, features and advantages of the present invention will become apparent from the following description of preferred embodiments given in conjunction with the accompanying drawings, in which:
Fig. 1 is a schematic view illustrating a roll-to-roll 10-color gravure printing system and a lamination system.
Fig. 2 is a circuit diagram of a printed RF label.
Fig. 3 is a circuit diagram of an RF label capable of display of moving pictures.
Fig. 4 illustrates a design of a printed RF label.
Fig. 5 is a graph showing the I-V measurements of a roll-to-roll printed diode.
Fig. 6 is a photographic view of an RF label as viewed through a power-off RF reader.
Fig. 7 is a photographic view of an RF label as viewed through a power-on RF reader.
Hereinafter, the embodiments of the present invention will be described in detail with reference to accompanying drawings.
Printing methods that may be used in the present invention include screen printing, inkjet printing, offset printing, flexographic printing and roll-to-roll gravure printing.
Fig. 1 is a schematic view illustrating a roll-to-roll gravure printing process for printing RF labels and RF logos at low cost. Particularly, Fig. 1 illustrates a 10-color printing process and a final lamination process, including a plastic film substrate section 101, a printing section (ink cup/printing plate) 102, a drying section 103, a lamination film section 104, a lamination section 105 and a finished product section 106. The gravure printing process as shown in Fig. 1 is described for illustrative purposes only and not intended to limit the scope of the present invention.
Fig. 2 is a circuit diagram of a printed RF label and RF logo. As shown in Fig. 2, an antenna, a diode, a capacitor and a display section are required basically to form a printed RF label in accordance with the present invention.
Fig. 3 is a circuit diagram of a printed RF label and RF logo capable of display of moving pictures. It is possible to maximize the information storage capability of an RF label by printing an RF label and RF logo capable of display of moving pictures via a roll-to-roll printing process, so that the information included in the RF label and RF logo may be displayed through moving pictures. As shown in Fig. 2, a control circuit that controls the electrochromic display section is required in addition to the antenna, diode, capacitor and display section to realize moving pictures. As used herein, the term moving pictures means that the displayed logos move or cause a change in shape. The control circuit that controls the display section to enable execution of moving pictures includes any control circuit that enables execution of moving pictures. For example, the control circuit may include an oscillator and a switch for the selective voltage (current) application.
Fig. 4 is a design image of an RF label and RF logo to be printed by a roll-to-roll gravure printing system.
To carry out the method for producing RF labels and RF logos capable of display in accordance with the present invention, first, an antenna is printed with a conductive ink containing conductive metal nanoparticles and having a resistivity of 1-100 mΩ/sq/mil.
Preferably, the conductive ink used for printing an antenna in accordance with the present invention contains conductive metal nanoparticles and has a resistivity of 1-100 mΩ/sq/mil. The conductive ink is one containing conductive metal nanoparticles selected from gold, silver, copper and aluminum having an average particle size of 10-100 nm and is capable of low-temperature firing. Methods for preparing such conductive inks are described specifically in Korean Patent Application No. 10-2007-0079897. More particularly, the conductive ink contains the conductive metal nanoparticles in an amount of 5-60 wt% so as to show electrical conductivity and to perform as an antenna. To improve the performance of an antenna, the conductive ink has a resistivity of 1-100 mΩ/sq/mil, preferably 1-50 mΩ/sq/mil.
Then, a capacitor is printed on the antenna printed as described above with an organic-inorganic hybrid ink, and a diode is printed with an active ink, thereby forming a rectifier.
The printing of the rectifier is carried out by such a method as described in Korean Patent Application No. 10-2007-0079912.
Particularly, the capacitor included in the capacitor is printed with a dielectric ink with a high dielectric constant, such as an ink obtained by the method as described in Korean Patent Application No. 10-2007-0079940. More particularly, the organic-inorganic hybrid ink includes a resin selected from polymethyl methacrylate (PMMA) and epoxy, and a metal oxide selected from barium titanate (BaTiO3) and aluminum oxide (Al2O3).
The active ink includes a resin selected from polypyrrole, polyaniline, polythiophene and poly-3-hexylthiophene (P3HT), and nanoparticles having an average particle diameter of 5-50 nm or nanowires having an average particle diameter of 50-150 nm and a length of 1-4 ㎛, which are selected from ZnO, Al-doped ZnO, B-doped ZnO, Co-doped ZnO, InP, InAs and Si.
Then, on the rectifier printed as described above, an electrochromic display is printed with an electrochromic conductive ink containing an electrochromic organic material and having a surface resistance of 10-500 Ω/sq, or a polymer light emitting diode is printed with poly(p-phenylene vinylene) (PPV) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] (MEHPPV) so as to realize electrochromic display.
More particularly, a working electrode is printed with an electrochromic conductive ink, a logo for displaying information is printed with a polymeric resin, a gel type and solid electrolyte is printed with an electrolyte ink, and then a counter electrode is further printed with the electrochromic conductive ink, so that an electrochromic display may be formed in the above operation.
Otherwise, an electrode is formed with a conductive ink, a logo-shaped polymer light emitting diode (PLED) is printed with poly(p-phenylene vinylene) (PPV) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] (MEHPPV), and then a counter electrode is printed with a conductive ink (PEODT), so that a light emitting diode may be formed in the above operation.
The electrochromic conductive ink includes a conductive resin selected from poly(3,4-ethylenedioxythiophene) (PEODT), polyaniline (PANI), 2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene (MEHPPV), polyphenylene vinylene (PPV), polypyrrole and polythiophene. The electrochromic conductive ink is used to print an electrochromic section. The conductive ink used in this manner suitably has a surface resistance of 10-500 Ω/sq, preferably 20-200 Ω/sq. When the surface resistance is less than 10 Ω/sq, the conductive ink needs to have a thickness larger than 200 nm, thereby affecting a contrast ratio and resulting in a failure in electrochromism. When the surface resistance is higher than 500 Ω/sq, there is little or no electrochromism. The electrochromic display printed as described above has a driving voltage of 0.5-10 V, preferably 1-7 V, and a driving current of 100 ㎂-50 mA, preferably 500 ㎂-20 mA. The diode printed as described above may be driven at a constant voltage of 5 V or higher and a current of 100 ㎂-50 mA. The diode is schematically shown in Fig. 5.
To facilitate electrochromism of a tag (or logo), an electrolyte ink may be used to activate the electrochromic conductive ink. The electrolyte ink includes a resin selected from polyvinyl alcohol, polyacrylonitrile, polyacrylic acid, polymethyl methacrylate (PMMA), acrylic resin and polyethylene oxide (PEO), and an electrolyte selected from LiNbO3, LiN, LiClO4, LiAl2O3, Ta2O5, ZrO2 and MgF2. The electrolyte is used in an amount of 0.01 wt%-5 wt%, preferably 0.05 wt%-2 wt%.
Hereinafter, a method for printing an electrochromic display by using the roll-to-roll gravure printing system as shown in Fig. 1 will be explained in more detail. The method may include a 10-color printing process, which includes: printing an antenna with a conductive ink; printing a capacitor of a rectifier with an organic-inorganic hybrid ink; printing a diode of a rectifier with an active ink; printing a Schottky diode electrode with a conductive ink; printing a working electrode capable of display for an electrochromic display with an electrochromic conductive ink; printing a logo for displaying information with a polymeric resin; printing a gel type electrolyte for driving electrochromism with an electrolyte ink; printing a counter electrode of an electrochromic display with an electrochromic conductive ink; printing a final interconnection, which connects the front end of the antenna with the terminal end of the antenna, with a conductive ink; and a final lamination.
In a variant, a method for printing a light emitting diode by using the roll-to-roll gravure printing system as shown in Fig. 1 may include: printing an antenna with a conductive ink; printing a capacitor of a rectifier with an organic-inorganic hybrid ink; printing a diode of a rectifier with an active ink; printing a Schottky diode electrode with a conductive ink; printing an electrode with a conductive ink; printing a polymer light emitting diode (PLED) in the form of a logo with poly(p-phenylene vinylene) (PPV) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] (MEHPPV); printing a counter electrode with PEDOT; and printing a final interconnection, which connects the front end of the antenna with the terminal end of the antenna, with a conductive ink.
As shown in Fig. 6, the electrochromic display or polymer light emitting display RF labels printed in accordance with the present invention show no information of the RF label when viewed through a power-off RF reader. On the other hand, as shown in Fig. 7, the information of the RF label is displayed when viewed through a power-on RF reader.
If desired, after printing the electrochromic display, a control circuit controlling the electrochromic display may be added to realize moving pictures. The control circuit includes an antenna, a diode, a capacitor, an oscillator, a DC/AC power switch and a moving picture display section.
The examples will now be described. The following examples are for illustrative purposes only and not intended to limit the scope of the present invention.
[Preparation Example 1]
Preparation of Conductive Ink
First, 0.3 g of AgNO3 is dissolved into 10 ml of distilled water to form an aqueous silver ion solution. Next, 0.02 g of polypyrrolidone (number average molecular weight 50,000) is added thereto and the resultant mixture is agitated in a homogenizer to obtain uniform dispersion. Then, 0.5 g of an aqueous 10% hydrazine solution is added slowly to the resultant dispersion and agitation is carried out for additional 3 hours to obtain a dark green solution. To the resultant solution, 20 ml of acetone is added, followed by agitation for 1 minute, and then centrifugal separation is carried out by using a centrifugal separator under 6000 rpm for 30 minutes to obtain silver precipitate. To the silver precipitate, 0.1 g of diethanol 2,2-azobis is added to obtain 0.2 g of silver nanogels.
[Preparation Example 2]
Preparation of Organic-Inorganic Hybrid Dielectric Ink
First, 2 g of titanium dioxide having an average particle size of 200 nm is dissolved into 10 ml of ethanol as an organic solvent and dispersed by ultrasonification. Next, 2 g of 3-trimethoxysilylpropyl methacrylate is added thereto, agitated at 70 ℃ for 1 hour, and dried in an oven at 80 ℃ for 2 hours. Then, 0.4 g of the titanium dioxide particles dried as described above are introduced into 10 g of N-methylpyrrolidone (NMP) and dispersed again. After that, 0.05 g of methyl methacrylate (MMA) monomers are added thereto and 0.0005 g of AIBN is further added as an initiator. The resultant mixture is heated to 60 ℃ to allow polymerization of MMA on the surface of the titanium dioxide particles. Then, 3 g of N-methylpyrrolidone (NMP) is added to the final mixture to obtain a dielectric ink having a viscosity of 350 cP.
[Preparation Example 3]
Preparation of Active Ink
As an active ink, a hybrid ink of InP nanoparticles (average particle diameter 30 nm) with PEDOT is used. (The hybrid ink includes 1 wt% PEDOT solution and INP nanoparticles in a ratio of 10:1).
[Preparation Example 4]
Preparation of Al Ink
An Al ink (60 wt% of 10 ㎛ Al particles, 10 wt% of ethyl cellulose, 29.5 wt% of butyl carbitol), 0.5 wt% of an amine-based dispersant, and 0.5 wt% of an aliphatic amine-based antioxidant are mixed and the mixture is milled in a ball mill for 12 hours.
[Preparation example 5]
Preparation of Electrochromic Conductive Ink
First, 5 parts by weight of ethylene dioxythiophene and 7 parts by weight of poly(4-styrenesulfonic acid) are introduced into 100 parts by weight of distilled water and dispersed by ultrasonification. Next, an initiator (ammonium persulfate available from Daejung Chemicals & Metals Co.Ltd.) is further introduced thereto to perform a reaction for 24 hours. After the completion of the reaction, 90 parts by weight of PEDOT washed with distilled water is mixed with 7 parts by weight of diethylene glycol and 3 parts by weight of distilled water to obtain an electrochromic conductive ink.
[Preparation Example 6]
Preparation of Electrolyte Ink
To obtain an electrolyte ink, 15 wt% of polymethyl methacrylate (PMMA) and 84.5 wt% of propylene carbonate are mixed with 0.5 wt% of LiClO4.
[Preparation Example 7]
Preparation of Active layer Ink
To 100 g of water, 3 g of an anionic surfactant (sodium dodecylsulfate) and 0.1 g of single-walled carbon nanotubes with an average length of 10 ㎛ and an average diameter of 2 nm are added and dispersed. Next, 0.0864 mol of 2,2-azobisisobutyronitrile is introduced as an initiator and a reaction is performed in a reaction tank at 60 ℃ under agitation for 12 hours to obtain an ink for an active layer.
[Example 1]
An RF tag is obtained by using a roll-to-roll 10-color gravure printing system.
In the first printing, the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an antenna. In the second printing, the dielectric ink (viscosity 300 cP) with a high dielectric constant obtained from Preparation Example 2 is used to print a capacitor of a rectifier. In the third printing, the active ink obtained from Preparation example 3 is used to print a diode of a rectifier. In the fourth printing, the Al ink obtained from Preparation Example 4 is used to print an electrode of a Schottky diode. In the fifth printing, the conductive ink obtained from Preparation Example 5 is used to print a working electrode of an electrochromic display. In the sixth printing, polysilicone (DLE 7645 available from Dong Yang Silicone Co.) is used to print a logo for displaying information. In the seventh printing, a gel type electrolyte is printed with the electrolyte ink obtained from Preparation Example 6 to facilitate electrochromism. In the eighth printing, the conductive ink obtained from Preparation Example 5 is used to print a counter electrode of an electrochromic display. In the ninth printing, the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as a final interconnection that connects the front end of the antenna with the terminal end of the antenna.
Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 2]
Example 1 is repeated, except that the ink used in the fifth printing and the eighth printing is polyaniline (PANI, dispersed into m-cresol at a concentration of 1 wt%). Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 3]
Example 2 is repeated, except that the electrolyte ink used in the seventh printing is prepared by mixing 3 wt% of polyacrylic acid, 0.5 wt% of LiClO4 and 96.5 wt% of distilled water. Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 4]
Example 1 is repeated, except that the electrochromic display section is replaced by a polymer light emitting diode.
In this example, a process for printing RF labels and logos using a polymer light emitting diode is carried out as follows.
In the fifth printing, the Al ink obtained from Preparation Example 4 is used to print a working electrode. In the sixth printing, a PPV ink (30 wt% of PPV, 68 wt% of toluene and 2 wt% of a silane group-containing coupling agent (3-glycidoxyprpyltrimethoxysilane)) is used to print a polymer light emitting diode. Herein, a logo including information is printed upon the printing of PPV ink. In the seventh printing, the PEDOT ink obtained from Preparation Example 5 is used to print a counter electrode. In the eighth printing, the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as the final interconnection that connects the front end of the antenna with the terminal end of the antenna.
Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 5]
Example 4 is repeated, except that the rectifier section is replaced by a PLED. The printing process is carried out as follows.
In the first printing, the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an antenna. In the second printing, the Al ink obtained from Preparation Example 4 is used to print an electrode. In the third printing, a PPV ink (30 wt% of PPV, 68 wt% of toluene, 2 wt% of a silane group-containing adhesion enhancer (available from Aldrich Co.)) is used to print a polymer light emitting diode. Herein, a logo including information is printed upon the printing of PPV ink. In the third printing, the PEDOT ink obtained from Preparation Example 5 is used to print a counter electrode. In the fourth printing, the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as a final interconnection that connects the front end of the antenna with the terminal end of the antenna.
Then, lamination is carried out. Finally, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 6]
Example 1 is repeated, except that the roll-to-roll gravure printer is replaced by an offset printer to print an RF label and RF logo. Inks adequate for an offset printing process are used. After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 7]
Example 1 is repeated, except that the roll-to-roll gravure printer is replaced by a screen printer to print an RF label and RF logo. Inks adequate for a screen printing process are used. After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 8]
Example 5 is repeated, except that the roll-to-roll gravure printer is replaced by an offset printer to print an RF label and RF logo. Inks adequate for an offset printing process are used. After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
[Example 9]
A roll-to-roll 10-color gravure printing system is used to produce an RF tag.
In the first printing, the Ag nanoink (viscosity 250 cP) is used to print an antenna. In the second printing, the dielectric ink (viscosity 300 cP) with a high dielectric constant obtained from Preparation Example 2 is used to print a capacitor required for a rectifier, an oscillator and an insulation layer required for a transistor included in a DC/AC power switch. In the third printing, the active ink is used to print a diode of a rectifier. In the fourth printing, the Al ink obtained from Preparation Example 4 is used to print an electrode of a Schottky diode. In the fifth printing, the electrochromic conductive ink obtained from Preparation example 5 is used to print a working electrode of an electrochromic display. In the sixth printing, polysilicone (DLE 7645 available from Dong Yang Silicone Co., Ltd.) is used to print a logo for displaying information. In the seventh printing, a gel type electrolyte is printed with the electrolyte ink obtained from Preparation Example 6 to facilitate electrochromism. In the eighth printing, the conductive ink obtained from Preparation Example 5 is used to print a counter electrode of an electrochromic display. In the ninth printing, the Ag nanoink (viscosity 250 cP) obtained from Preparation Example 1 is used to print an electrode as a final interconnection that connects the front end of the antenna with the terminal end of the antenna, and a drain source of a transistor included in an oscillator and a DC/AC power switch. In the tenth printing, active layers included in the oscillator and the DC/AC power switch are printed. The active layers use the active layer ink as disclosed in Korean Patent Application No. 10-2008-0039122 and the ink obtained from Preparation Example 7.
After the final lamination, it is determined through an RF reader that the RF logo is operated when it approaches the RF reader.
While the present invention has been described with respect to the specific embodiments, it will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
The present invention provides a method for producing RF labels and RF logos at low cost via a roll-to-roll gravure printing system.
The RF label disclosed herein is obtained in a time-efficient manner by using a printing process. The method for producing RF labels and RF logos disclosed herein minimizes the manufacturing cost not by using silicon semiconductor chips directly but by printing the chips on plastic substrates. The RF labels and RF logos are attached easily to various types of objects. In addition, since RF labels and RF logos capable of display of moving pictures are obtained via a printing process, it is possible for RF labels to have improved information display capabilities and to attract consumer interest.

Claims (12)

  1. A method for producing printed RF labels capable of display, comprising:
    printing an antenna with a conductive ink containing conductive metal nanoparticles and having a resistivity of 1-100 mΩ/sq/mil;
    printing a capacitor with an organic-inorganic hybrid ink and printing a diode with an active ink, after printing the antenna, to form a rectifier; and
    printing an electrode capable of display or a light emitting diode with an electrochromic conductive ink containing an electrochromic organic material and having a surface resistance of 10-500 Ω/sq, after printing the rectifier, to form an electrochromic display section.
  2. The method for producing printed RF labels capable of display according to claim 1, wherein the electrode capable of display is obtained by forming a working electrode with an electrochromic conductive ink, printing a logo for displaying information with a polymeric resin, printing a gel type electrolyte and solid electrolyte with an electrolyte ink, and printing a counter electrode with an electrochromic conductive ink.
  3. The method for producing printed RF labels capable of display according to claim 1, wherein the light emitting diode is obtained by forming an electrode with a conductive ink, printing a diode in the form of a logo for displaying information with poly(p-phenylene vinylene) (PPV) or poly[2-methoxy-5-(2-ethylhexyloxy)-p-phenylene vinylene] (MEHPPV), and printing an electrode with a conductive ink.
  4. The method for producing printed RF labels capable of display according to claim 1, which further comprises adding a control circuit that controls the electrochromic display section, after forming the electrochromic display section.
  5. The method for producing printed RF labels capable of display according to any one of claims 1 to 4, wherein said printing is selected from screen printing, inkjet printing, offset printing, flexographic printing and roll-to-roll gravure printing.
  6. The method for producing printed RF labels capable of display according to claim 5, wherein said roll-to-roll gravure printing comprises:
    printing an antenna with a conductive ink;
    printing a capacitor of a rectifier with an organic-inorganic hybrid ink;
    printing a diode of a rectifier with an active ink;
    printing a Schottky diode electrode with a conductive ink;
    printing a working electrode capable of display for an electrochromic display with an electrochromic conductive ink;
    printing a logo for displaying information with a polymeric resin;
    printing a gel type and solid electrolyte for driving electrochromism with an electrolyte ink;
    printing a counter electrode of an electrochromic display with an electrochromic conductive ink;
    printing a final interconnection, which connects the front end of the antenna with the terminal end of the antenna, with a conductive ink; and
    final lamination.
  7. The method for producing printed RF labels capable of display according to claim 6, wherein the conductive ink comprises conductive metal nanoparticles selected from gold, silver, copper and aluminum and having an average particle diameter of 10-100 nm.
  8. The method for producing printed RF labels capable of display according to claim 6, wherein the organic-inorganic hybrid ink comprises a resin selected from polymethyl methacrylate (PMMA), epoxy and polyvinylidene difluoride (PVDF), and a metal oxide selected from titanium dioxide (TiO2), barium titanate (BaTiO3), aluminum oxide (Al2O3), PMN-PT (Pb(Mg,Nb)O3), silicon dioxide (SiO2), lead oxide (PbO), boron oxide (B2O3) and other metal oxides.
  9. The method for producing printed RF labels capable of display according to claim 6, wherein the active ink comprises a resin selected from polypyrrole, polyaniline, polythiophene and poly-3-hexylthiophene (P3HT), and nanoparticles having an average particle diameter of 5-50 nm or nanowires having an average particle diameter of 50-150 nm and a length of 1-4 ㎛, which are selected from ZnO, Al-doped ZnO, B-doped ZnO, Co-doped ZnO, InP, InAs and Si.
  10. The method for producing printed RF labels capable of display according to claim 6, wherein the electrochromic conductive ink comprises a conductive resin selected from poly(3,4-ethylenedioxythiophene) (PEODT), polyaniline (PANI), 2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene (MEHPPV), polyphenylene vinylene (PPV), polypyrrole and polythiophene.
  11. The method for producing printed RF labels capable of display according to claim 6, wherein the electrolyte ink comprises a resin selected from polyvinyl alcohol, polyacrylonitrile, polyacrylic acid, polymethyl methacrylate, acrylic resin and polyethylene oxide, and an electrolyte selected from LiNbO3, LiN, LiClO4, LiAl2O3, Ta2O5, ZrO2 and MgF2.
  12. A printed RF label capable of display, obtained by the method as defined in any one of claims 1 to 4.
PCT/KR2009/008021 2009-09-16 2009-12-31 Printed rf label for display WO2011034261A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020090087627A KR100968578B1 (en) 2009-09-16 2009-09-16 Printed rf label for display
KR10-2009-0087627 2009-09-16

Publications (1)

Publication Number Publication Date
WO2011034261A1 true WO2011034261A1 (en) 2011-03-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3002108A1 (en) * 2013-02-14 2014-08-15 Ask Sa Method for manufacturing thin carrier of radio frequency device e.g. smart card, operating in high frequency field, involves heat treating contact pads of antenna to dry polymer ink, and connecting chip or electronic module to contact pads
CN111325301A (en) * 2020-02-16 2020-06-23 陕西科技大学 Anti-counterfeiting system prepared by organic conductive polymer ink and full printing and manufacturing method thereof
CN111410870A (en) * 2020-02-16 2020-07-14 陕西科技大学 Organic conductive polymer ink and anti-counterfeiting system based on screen printing and manufacturing method thereof

Citations (2)

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Publication number Priority date Publication date Assignee Title
KR20090015524A (en) * 2007-08-09 2009-02-12 (주) 파루 A method for preparing rf commutator using printing process
KR20090015544A (en) * 2007-08-09 2009-02-12 (주) 파루 Hybrid isolation ink with high dielectric constant for plastic printed electronic device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090015524A (en) * 2007-08-09 2009-02-12 (주) 파루 A method for preparing rf commutator using printing process
KR20090015544A (en) * 2007-08-09 2009-02-12 (주) 파루 Hybrid isolation ink with high dielectric constant for plastic printed electronic device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3002108A1 (en) * 2013-02-14 2014-08-15 Ask Sa Method for manufacturing thin carrier of radio frequency device e.g. smart card, operating in high frequency field, involves heat treating contact pads of antenna to dry polymer ink, and connecting chip or electronic module to contact pads
CN111325301A (en) * 2020-02-16 2020-06-23 陕西科技大学 Anti-counterfeiting system prepared by organic conductive polymer ink and full printing and manufacturing method thereof
CN111410870A (en) * 2020-02-16 2020-07-14 陕西科技大学 Organic conductive polymer ink and anti-counterfeiting system based on screen printing and manufacturing method thereof
CN111325301B (en) * 2020-02-16 2023-04-28 苏州同里印刷科技股份有限公司 Organic conductive polymer ink, anti-counterfeiting system prepared by full printing and manufacturing method of anti-counterfeiting system

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