WO2008020574A1 - Élément d'antenne et procédé de fabrication de celui-ci - Google Patents

Élément d'antenne et procédé de fabrication de celui-ci Download PDF

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Publication number
WO2008020574A1
WO2008020574A1 PCT/JP2007/065732 JP2007065732W WO2008020574A1 WO 2008020574 A1 WO2008020574 A1 WO 2008020574A1 JP 2007065732 W JP2007065732 W JP 2007065732W WO 2008020574 A1 WO2008020574 A1 WO 2008020574A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
antenna element
magnetic
wiring
element according
Prior art date
Application number
PCT/JP2007/065732
Other languages
English (en)
Japanese (ja)
Inventor
Takashi Hasunuma
Keiichiro Nomura
Arata Tanaka
Takaki Naito
Takeshi Kimura
Original Assignee
Tyco Electronics Raychem K.K.
Tyco Electronics Amp K.K.
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 Tyco Electronics Raychem K.K., Tyco Electronics Amp K.K. filed Critical Tyco Electronics Raychem K.K.
Priority to EP07792377A priority Critical patent/EP2063489A4/fr
Priority to JP2008529858A priority patent/JPWO2008020574A1/ja
Publication of WO2008020574A1 publication Critical patent/WO2008020574A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • 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
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/08—Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
    • H01Q7/08—Ferrite rod or like elongated core

Definitions

  • the present invention relates to an antenna element, in particular, an antenna element that can be used in an apparatus used in an RFID (Radio Frequency Identification) system, for example, an antenna element that can be used in an IC tag, and an antenna element that is used in a reader / writer. Furthermore, the present invention relates to an electronic device having such an antenna element, for example, a wireless tag or an IC tag (which may be a mobile phone) and a reader / writer used for transmission / reception with the electronic tag.
  • RFID Radio Frequency Identification
  • One such problem is the problem of the antennas of tags, readers / writers, etc., which are units constituting an RFID system. Antennas are used to send and receive signals and / or supply power by using electromagnetic induction.
  • non-contact IC card reader / magnet with a flexible sheet-like magnetic material placed under the antenna for the purpose of preventing adverse effects on communications caused by metal articles and reducing the occupied space.
  • a writer has been proposed (see Patent Document 1 below). In this reader / writer, the antenna and sheet-like magnetic material are bonded together with double-sided tape.
  • non-contact data transmission / reception has an antenna and an IC chip provided on one surface of a base substrate, and a magnetic layer is disposed so as to cover at least one of the antenna and the IC chip.
  • Patent Document 1 Japanese Patent Laid-Open No. 2002-298095
  • Patent Document 2 Japanese Unexamined Patent Publication No. 2006-113750
  • the RFID system is expected to be used more widely in portable electronic devices such as mobile phones.
  • the antenna elements included in the tags, readers / writers, etc. that make up the system are used. It is desirable to make it compact, and it is desirable to make it easier to manufacture antenna elements.
  • a layered magnetic element formed from a magnetic composition comprising a magnetic material and a polymer material (eg, a plate-like, sheet-like or film-like magnetic element), and
  • the present invention is a method of manufacturing an antenna element having a layered magnetic element and an antenna wiring disposed thereon,
  • an antenna element which includes a step of etching a metal foil to form an antenna wiring having a predetermined pattern.
  • the present invention relates to an electronic device having the antenna element of the present invention described above and below. We also provide readers / writers for sending and receiving with IC tags.
  • the antenna wiring is directly attached to the layered magnetic element. Therefore, there is no interposition between the antenna wiring and the layered magnetic element (for example, double-sided adhesive tape, resin layer derived from adhesive), and other elements such as a base substrate are required. Therefore, the antenna element is thinner, so that it can be formed more compactly.
  • the layered magnetic element for example, double-sided adhesive tape, resin layer derived from adhesive
  • a layered magnetic element having antenna wiring can be obtained by directly attaching a metal foil to the layered magnetic element and then etching it.
  • the attachment of the metal foil to the element is simplified, and since no base material is required, the antenna element can be manufactured more easily.
  • FIG. 1 is a schematic perspective view of an antenna element of the present invention.
  • FIG. 2 shows a flow diagram (process diagram) of the manufacturing method of the antenna element of the present invention.
  • FIG. 1 shows a schematic perspective view of the antenna element of the present invention.
  • FIG. 2 schematically shows a manufacturing method of the antenna element of the present invention in a flow sheet.
  • the antenna element 10 of the present invention includes a magnetic composition comprising a magnetic material and a polymer material.
  • a layered magnetic element 20 formed from a material, and an antenna wiring 30 disposed on one surface of the layered magnetic element 20.
  • the layered magnetic element 20 may have any suitable shape having a planar spread, for example, a plate shape, a sheet shape, or a film shape. Accordingly, in this specification, the term “surface” means a surface defining such a spread, that is, a main surface, and the layered magnetic element 30 has two surfaces on both sides. Therefore, the antenna element of the present invention includes both an aspect in which the antenna wiring is provided on one surface of the layered magnetic element and an aspect in which the antenna wiring is provided on both surfaces of the layered magnetic element.
  • the magnetic material constituting the layered magnetic element various magnetic materials proposed as those capable of exhibiting the antenna function (that is, the function of receiving and transmitting and / or the power supply) in the antenna element.
  • Materials can be used.
  • Specific examples of magnetic materials that are preferably used include iron-cathenium alloys, so-called ferrite magnetic materials, particularly Mn-Zn ferrite, Ni-Zn ferrite, iron-nickel alloy, especially permalloy.
  • Examples thereof include magnetic materials called sendust alloys, amorphous alloys, and preferably iron-based amorphous alloys, particularly those containing Si, B, Cu, and Nb containing Fe as a main component. More specifically, TDK Corporation can use IRL (trade name of TDK Corporation) marketed as a composite electromagnetic shielding material, FineMet marketed by Hitachi Metals Co., Ltd., etc. Such a magnetic material may be in any suitable form, for example granular or flaky.
  • the polymer material constituting the magnetic material layer is proposed as an antenna function (that is, a transmission / reception function and / or a power supply function) in the antenna element can be improved in combination with the magnetic material.
  • a variety of polymer materials can be used. In particular, it is desirable to use a polymer material that does not adversely affect or has a positive effect on the magnetic material having the function of converging the magnetic flux.
  • the polymer material that is preferably used may be a crystalline polymer or an amorphous polymer.
  • polyethylene PE
  • chlorinated polyethylene PE
  • polyethylene sulfide PPS
  • polypropylene poly (vinyl chloride), polyvinylidene fluoride
  • polystyrene poly
  • thermoplastic polymers such as oxymethylene, ethylene butylacetate copolymer (EVA), ethylene-butynole acrylate copolymer (EBA), polyethylene terephthalate (PET), nylon, attalyl nitrile butadiene styrene terpolymer (ABS).
  • EVA ethylene butylacetate copolymer
  • EBA ethylene-butynole acrylate copolymer
  • PET polyethylene terephthalate
  • ABS attalyl nitrile butadiene styrene terpolymer
  • a thermoplastic elastomer can also be used as the polymer material.
  • the magnetic composition containing the magnetic material and the polymer material as described above may contain these components in any appropriate ratio as long as the antenna element of the present invention can exhibit the function of the antenna.
  • the magnetic composition comprises 60-95 parts by weight of magnetic material and 40-5 parts by weight of polymer material, more preferably 75-92 parts by weight of magnetic material and 25-8 parts by weight of polymer material.
  • the magnetic composition may contain additional components (for example, plasticizers for polymer materials (eg, chlorinated paraffin, epoxidized soybean oil, olefinic wax), organic / inorganic flame retardants, etc.). May include.
  • the antenna wiring 30 is disposed on one surface of the layered magnetic element 20 as shown in the figure, for example. In another aspect described later, they may be arranged on both surface shapes. In either embodiment, the antenna wiring 30 is directly attached to the layered magnetic element 20.
  • the term “on the surface” means that the antenna wiring protrudes from the surface of the magnetic layered element.
  • the term “directly” means that the antenna wiring and the layered magnetic element are coupled in contact with each other, that is, directly coupled.
  • the antenna wiring may have any suitable shape, for example, a spiral shape (a square spiral shape) as illustrated. Other shapes such as loop, helical, monopole, dipole, patch, slot shape, etc. may be used.
  • the antenna element of the present invention appropriately includes necessary electronic components (IC chip, capacitor, chip resistor, etc.) and other wiring necessary for electrical connection with the antenna wiring in addition to the antenna wiring. Good. Such electronic components and other wirings may be arranged on either side of the layered magnetic element as required. In one embodiment, these electronic components and other wiring are present on the surface of the layered magnetic element where the antenna wiring is present.
  • the layered magnetic element is provided with a through hole in which the conductive element (conductive Sex tree Such as grease, resin solder, etc.), or a conductive metal plating layer is formed inside the through hole, and the electrical connection between the antenna wiring existing on the surface of the layered magnetic element and the electronic component and other wiring Secure connection.
  • conductive Sex tree such as grease, resin solder, etc.
  • the structure in which the antenna wiring protrudes from the surface of the layered magnetic element as described above is inherently obtained by manufacturing the antenna element according to the present invention described above and below. That is, by attaching a metal foil as a precursor of the antenna wiring on the layered magnetic element, and then etching the metal foil so that only a portion corresponding to the antenna wiring remains, such a structure is obtained. Is obtained.
  • the method for manufacturing an antenna element according to the present invention includes a step of obtaining an antenna element precursor by directly attaching (for example, thermocompression bonding) a metal foil to a layered magnetic element (step (2) in FIG. 2), And an antenna wiring or antenna circuit having a predetermined pattern by etching the metal foil to obtain an antenna element (step (3) in FIG. 3).
  • the layered magnetic element can obtain a force S obtained by the step of forming the above-described magnetic composition into a layer (step (1) in FIG. 2).
  • the layered magnetic element can be obtained in a sheet form by press molding or compression molding.
  • a layered element having a predetermined thickness can be obtained by filling a magnetic composition in a gap corresponding to a predetermined thickness of the layered element and pressurizing / heating the magnetic composition.
  • the layered magnetic element can be obtained by extruding the magnetic composition under heating, and in this case, it can be a long (or continuous) layered magnetic element.
  • the layered magnetic element in the heated state may be cooled as necessary.
  • the method for manufacturing an antenna element of the present invention is as shown in FIG.
  • a step of extruding a magnetic composition comprising a magnetic material and a polymer material into a layer to obtain an extrudate
  • Fig. 2 shows a flow diagram of the production method of the present invention.
  • the magnetic material and the polymer material are mixed by an appropriate mixing / kneading means (for example, a Banbury mixer or a twin screw kneader) to obtain a magnetic composition in which they are homogeneously mixed.
  • This composition is molded (eg, extruded) to obtain a layered magnetic element.
  • the direct adhesion of the metal foil to the layered magnetic element is preferably carried out by placing the metal foil on the layered magnetic element and performing, for example, thermocompression using a hot press.
  • the metal foil is attached to the layered magnetic element manufactured in advance, for example, the layered magnetic element is heated.
  • At least the surface on which the metal foil is placed is heated to at least the softening temperature of the polymer material, preferably to the melting temperature.
  • it may be heated alone or in a state where the metal foil is disposed on the layered magnetic element. In addition, you may heat a metal foil as needed.
  • the metal foil is thermocompression bonded, and thus immediately after extrusion. Further, it is preferable that the metal foil is thermocompression bonded. In this case, it is particularly preferred because it is efficient to carry out extrusion and hot pressing as a continuous process.
  • the layered magnetic element in particular its surface, may be heated if necessary. For this purpose, for example, a heating roller may be used.
  • the metal foil to be used has sufficient coupling with the layered magnetic element in which the surface in contact with the layered magnetic element preferably has a nodular (or nodule) or knob-like projection is preferred. Strength can be secured.
  • a metal foil that is provided with irregularities on its surface by depositing a bump-like metal protrusion by electrodeposition, that is, a so-called electrolytic metal foil (for example, an electrolytic copper foil) is used. Is preferred. In this case, it is preferable to arrange the metal foil so that the uneven surface is in contact with the layered magnetic element. When such a concavo-convex surface is used, the adhesion between the metal foil and the layered magnetic element is improved by the anchor effect of the knob.
  • the metal foil when a metal foil is attached and an antenna wiring pattern is formed by etching, the metal foil has an area sufficient to form a plurality of antenna wirings. Therefore, multiple antenna wiring is formed by etching The In this case, after the etching, the individual antenna elements can be obtained by dividing into layered magnetic elements having individual antenna wirings.
  • the antenna element of the present invention includes necessary electronic components in addition to the antenna wiring.
  • Such an electronic component having an antenna for example, an IC chip, a capacitor, etc.
  • Such wiring is preferably formed at the same time as the etching for forming the antenna wiring, if necessary.
  • the mounting of the electronic component is preferably performed after the antenna wiring and other necessary wiring are formed by etching.
  • etching it is preferable to implement mounting before dividing into individual antenna elements.
  • the antenna wiring is provided on the surfaces on both sides of the layered magnetic element.
  • this antenna element can be formed by directly attaching a metal foil to both sides of a layered magnetic element and then etching the metal foil.
  • thermocompression bonding When the metal foil is attached to one surface of the layered magnetic element, it is preferable to use thermocompression bonding. At this time, both the layered magnetic element and the metal foil are heated and then cooled. It will be. Because of their different coefficients of thermal expansion (especially linear expansion), in the cooled state, the composite of the thermocompression-bonded layered magnetic element and metal foil is caused by the difference in coefficient of expansion, even though it is apparently flat. It is in a state including internal stress. Then, if a part of the metal foil is removed by etching, the internal stress becomes obvious, which may cause warpage.
  • the metal foil when the metal foil is attached to both sides of the layered magnetic element as in another embodiment, the metal foil exists on both sides of the layered magnetic element even if there is a difference in expansion coefficient. Are substantially canceled out on both sides, and the layered magnetic element having the metal foil on both surfaces is excellent in flatness as compared with the case of having the metal layer only on one side. Even after the metal foil is processed into the antenna wiring by etching, the presence of the antenna wiring on both sides can have an effect of canceling out the internal stress, so that the flatness is excellent. In this sense, the antenna element of the present invention has antenna wiring on both sides of the layered magnetic element. It is preferable to do this.
  • the antenna wiring is formed so as to be substantially opposed via the layered magnetic element, that is, the other antenna wiring exists via the layered magnetic element on one antenna wiring.
  • one antenna wiring preferably overlaps at least partially, preferably substantially just overlaps the other wiring layer.
  • a through-hole is provided in the layered magnetic element at the end of one antenna wiring, and a conductive element (conductive resin, resin solder, etc.) is embedded in the hole.
  • a conductive metal plating layer may be formed inside the through hole to ensure electrical connection of the antenna wiring between both surfaces of the layered magnetic element.
  • antenna wiring on both sides of the layered magnetic element makes it possible to make the absolute length of the antenna wiring longer when using layered magnetic elements of the same size. This means that the size of the antenna element can be further reduced. Since the absolute length becomes longer, it becomes possible to secure more allowance for inductance / capacitance adjustment, and the design flexibility of the antenna wiring is improved, so that the antenna wiring can be formed on one side of the layered magnetic element. Rather than the geometrical constraints imposed on antenna wiring formation.
  • Finemet registered trademark
  • FP—FT—5M manufactured by Hitachi Metals, flat magnetic filler, average particle size: 30—41 m, apparent density: 0.5 ⁇ 0.7 g / cm 3 , tap density: 1. 0—1.4 gZ cm
  • Diasolac (registered trademark) C-130 (chlorinated polyethylene, manufactured by Daiso Corporation, true density: 1. l lg / cm)
  • the kneaded mass obtained as described above was made into a sandwich structure of iron plate / Teflon sheet / thickness adjusting spacer (made of SUS, thickness 0.5 mm) + kneaded mass / Teflon sheet / iron plate, Machine (Toho Press Mfg. Co., Ltd., hydraulic molding machine: Model T1), pre-pressed for 3 minutes at a preset temperature of 100 ° C and a preset pressure of IMPa for 4 minutes at 15 MPa. . Then, using a cooling press machine (Toho Press Mfg.
  • test sample (15 mm ⁇ 5 mm) was cut out from the layered magnetic element obtained as described above, and its permeability and saturation magnetic flux density were measured using the following apparatus:
  • VSM Vibration sample type magnetometer
  • Each magnetic sheet with copper foil obtained as described above was etched to form a spiral antenna pattern as shown in Fig. 1 on the magnetic sheet to obtain the antenna element of the present invention. Then, using LCR METER 4263A (manufactured by HEWLETT PACKARD), measurement probes were arranged at both ends of the antenna, and the inductance L and Q values were measured at a frequency of 10 kHz. The results are shown in Table 4 below.
  • the present invention provides an antenna element that can be more easily manufactured, and also provides a method for manufacturing such an antenna element.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Aerials (AREA)

Abstract

L'invention concerne un élément d'antenne utilisé pour un marqueur de configuration d'un système RFID (Identification par Radiofréquence) et pouvant être facilement fabriqué. Un élément d'antenne (10) comporte (A) un élément (20) magnétique semblable à une couche formée d'une composition magnétique comprenant une matière magnétique et une matière polymère, et (B) un câblage (30) d'antenne agencé sur une surface de l'élément magnétique semblable à une couche.
PCT/JP2007/065732 2006-08-14 2007-08-10 Élément d'antenne et procédé de fabrication de celui-ci WO2008020574A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07792377A EP2063489A4 (fr) 2006-08-14 2007-08-10 Élément d'antenne et procédé de fabrication de celui-ci
JP2008529858A JPWO2008020574A1 (ja) 2006-08-14 2007-08-10 アンテナ素子およびその製造方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006221037 2006-08-14
JP2006-221037 2006-08-14

Publications (1)

Publication Number Publication Date
WO2008020574A1 true WO2008020574A1 (fr) 2008-02-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/065732 WO2008020574A1 (fr) 2006-08-14 2007-08-10 Élément d'antenne et procédé de fabrication de celui-ci

Country Status (6)

Country Link
EP (1) EP2063489A4 (fr)
JP (1) JPWO2008020574A1 (fr)
KR (1) KR20090051096A (fr)
CN (1) CN101501930A (fr)
TW (1) TW200828679A (fr)
WO (1) WO2008020574A1 (fr)

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WO2020153050A1 (fr) * 2019-01-21 2020-07-30 山陽特殊製鋼株式会社 Poudre ignifuge pour organe magnétique, et composition polymère

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JP7257150B2 (ja) 2019-01-21 2023-04-13 山陽特殊製鋼株式会社 磁性部材用の難燃性粉末

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EP2063489A1 (fr) 2009-05-27
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KR20090051096A (ko) 2009-05-20
JPWO2008020574A1 (ja) 2010-01-07
TW200828679A (en) 2008-07-01

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