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WO2009037978A1 - Coil antenna, and its manufacturing method - Google Patents

Coil antenna, and its manufacturing method Download PDF

Info

Publication number
WO2009037978A1
WO2009037978A1 PCT/JP2008/065910 JP2008065910W WO2009037978A1 WO 2009037978 A1 WO2009037978 A1 WO 2009037978A1 JP 2008065910 W JP2008065910 W JP 2008065910W WO 2009037978 A1 WO2009037978 A1 WO 2009037978A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal
coil
thermoplastic resin
plated layer
coil antenna
Prior art date
Application number
PCT/JP2008/065910
Other languages
French (fr)
Japanese (ja)
Inventor
Takaaki Ooi
Yasuharu Imai
Masami Mizuyama
Original Assignee
Murata Manufacturing 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 Murata Manufacturing Co., Ltd. filed Critical Murata Manufacturing Co., Ltd.
Publication of WO2009037978A1 publication Critical patent/WO2009037978A1/en

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
    • H01Q7/08—Ferrite rod or like elongated core
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H01F27/292—Surface mounted devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/022—Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/02—Casings
    • H01F27/027—Casings specially adapted for combination of signal type inductors or transformers with electronic circuits, e.g. mounting on printed circuit boards
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/2823—Wires
    • H01F27/2828—Construction of conductive connections, of leads
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/10—Connecting leads to windings

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Or Transformers For Communication (AREA)

Abstract

Provided are a coil antenna, which can suppress the increases of the manufacture and product costs and which has its two coil ends prevented from becoming detached from metal terminals because of the high heat at a resin molding time and the stress to be applied during use of a product. A coil antenna (1) includes a core (2), a coil (3), a pair of metal terminals (4-1 and 4-2) and a thermoplastic resin (5). On the surfaces of the metal terminals (4-1 and 4-2), there are formed a first metal-plated layer (43) having a higher melting point than that of the thermoplastic resin (5), and a second metal-plated layer (44) having a lower melting point than that of the thermoplastic resin (5). The coil (3) has its end portions (31 and 32) junctioned to the first metal-plated layer (43) by alloy layers (31a and 32a) and held by the fillet (44a) of the second metal-plated layer (44). The thermoplastic resin (5) covers the core (2), the coil (3) and the metal terminals (4-1 and 4-2) with an external electrode portion (42) being exposed to the outside.
PCT/JP2008/065910 2007-09-19 2008-09-03 Coil antenna, and its manufacturing method WO2009037978A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007241844 2007-09-19
JP2007-241844 2007-09-19

Publications (1)

Publication Number Publication Date
WO2009037978A1 true WO2009037978A1 (en) 2009-03-26

Family

ID=40467797

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/065910 WO2009037978A1 (en) 2007-09-19 2008-09-03 Coil antenna, and its manufacturing method

Country Status (1)

Country Link
WO (1) WO2009037978A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018037523A (en) * 2016-08-31 2018-03-08 太陽誘電株式会社 Coil component
JP2019029579A (en) * 2017-08-02 2019-02-21 太陽誘電株式会社 Coil component
JP2022092089A (en) * 2020-12-10 2022-06-22 株式会社村田製作所 Coil component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08148341A (en) * 1994-11-22 1996-06-07 Koa Corp Chip inductor
JP2005142263A (en) * 2003-11-05 2005-06-02 Tdk Corp Coil device
JP2006140301A (en) * 2004-11-11 2006-06-01 Murata Mfg Co Ltd Coil component

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08148341A (en) * 1994-11-22 1996-06-07 Koa Corp Chip inductor
JP2005142263A (en) * 2003-11-05 2005-06-02 Tdk Corp Coil device
JP2006140301A (en) * 2004-11-11 2006-06-01 Murata Mfg Co Ltd Coil component

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018037523A (en) * 2016-08-31 2018-03-08 太陽誘電株式会社 Coil component
US10854371B2 (en) 2016-08-31 2020-12-01 Taiyo Yuden Co., Ltd. Coil element
US11935686B2 (en) 2016-08-31 2024-03-19 Taiyo Yuden Co., Ltd. Method for manufacturing a coil element
JP2019029579A (en) * 2017-08-02 2019-02-21 太陽誘電株式会社 Coil component
US11004593B2 (en) * 2017-08-02 2021-05-11 Taiyo Yuden Co., Ltd. Coil component
US11935689B2 (en) 2017-08-02 2024-03-19 Taiyo Yuden Co., Ltd. Method for manufacturing coil component having coil part with flat-shaped connection end parts
JP2022092089A (en) * 2020-12-10 2022-06-22 株式会社村田製作所 Coil component
JP7359134B2 (en) 2020-12-10 2023-10-11 株式会社村田製作所 coil parts

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