WO2003007232A1 - Lead frame antenna - Google Patents
Lead frame antenna Download PDFInfo
- Publication number
- WO2003007232A1 WO2003007232A1 PCT/CH2001/000438 CH0100438W WO03007232A1 WO 2003007232 A1 WO2003007232 A1 WO 2003007232A1 CH 0100438 W CH0100438 W CH 0100438W WO 03007232 A1 WO03007232 A1 WO 03007232A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- lead frame
- antenna
- transponder
- transponder according
- integrated circuit
- Prior art date
Links
Classifications
-
- 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
- H01Q1/2225—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 used in active tags, i.e. provided with its own power source or in passive tags, i.e. deriving power from RF signal
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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
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
-
- 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
- G06K19/07749—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
- G06K19/0775—Constructional details, e.g. mounting of circuits in the carrier the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card arrangements for connecting the integrated circuit to the antenna
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/495—Lead-frames or other flat leads
- H01L23/49541—Geometry of the lead-frame
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- 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
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/06—Details
- H01Q9/065—Microstrip dipole antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/02—Bonding areas; Manufacturing methods related thereto
- H01L2224/04—Structure, shape, material or disposition of the bonding areas prior to the connecting process
- H01L2224/05—Structure, shape, material or disposition of the bonding areas prior to the connecting process of an individual bonding area
- H01L2224/0554—External layer
- H01L2224/05599—Material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/44—Structure, shape, material or disposition of the wire connectors prior to the connecting process
- H01L2224/45—Structure, shape, material or disposition of the wire connectors prior to the connecting process of an individual wire connector
- H01L2224/45001—Core members of the connector
- H01L2224/45099—Material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/481—Disposition
- H01L2224/48151—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/48221—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/48245—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic
- H01L2224/48247—Connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being metallic connecting the wire to a bond pad of the item
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/491—Disposition
- H01L2224/4911—Disposition the connectors being bonded to at least one common bonding area, e.g. daisy chain
- H01L2224/49111—Disposition the connectors being bonded to at least one common bonding area, e.g. daisy chain the connectors connecting two common bonding areas, e.g. Litz or braid wires
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
- H01L2224/494—Connecting portions
- H01L2224/4941—Connecting portions the connecting portions being stacked
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/80—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected
- H01L2224/85—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a wire connector
- H01L2224/8538—Bonding interfaces outside the semiconductor or solid-state body
- H01L2224/85399—Material
- H01L2224/854—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof
- H01L2224/85438—Material with a principal constituent of the material being a metal or a metalloid, e.g. boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te) and polonium (Po), and alloys thereof the principal constituent melting at a temperature of greater than or equal to 950°C and less than 1550°C
- H01L2224/85444—Gold (Au) as principal constituent
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L24/42—Wire connectors; Manufacturing methods related thereto
- H01L24/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L24/49—Structure, shape, material or disposition of the wire connectors after the connecting process of a plurality of wire connectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/00014—Technical content checked by a classifier the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/14—Integrated circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/15—Details of package parts other than the semiconductor or other solid state devices to be connected
- H01L2924/181—Encapsulation
Definitions
- the present invention relates to a transponder and in particular to a RFID (Radio- Frequency Identification) transponder made essentially of an antenna circuit connected to an integrated circuit (IC).
- RFID Radio- Frequency Identification
- a passive RFID transponder 2 (see Fig. 1 ) is made by connecting an Application Specific Integrated Circuit (ASIC) 2b to an antenna circuit 2a.
- the supplied transponder 2 sends information 4 back to the reader using the same antenna 2a.
- US patent No 5,420,757 discloses a transponder comprising a lead frame, an antenna circuit and an integrated circuit connected to the antenna circuit.
- the invention relates to a transponder comprising a lead frame, an antenna circuit and an integrated circuit directly or indirectly connected to the antenna circuit, characterized by the fact that said lead frame is conductive and is designed to be the antenna.
- the lead frame is furthermore designed to be the mounting substrate for said integrated circuit.
- the lead frame is furthermore designed to constitute the frame or electronic holder for the transponder packaging.
- the antenna is made of several lead frames.
- One of the lead frames may be used as holder during the packaging process.
- the transponder comprises several antennas where at least one is made of at least one lead frame.
- the transponder according to the invention in using a single lead frame (LF), offers in particular the advantage to manufacture simple antennas for transponders.
- Figure 1 illustrates a state of the art communication system including a transponder.
- Figure 2 shows a first transponder according to the invention where the antenna is a coil.
- Figure 3 shows another transponder according to the invention where the antenna is a dipole.
- Figure 4 shows another transponder according to the invention where the antenna uses a ground plane.
- Figure 5 shows another transponder according to the invention where the antenna includes a flat surface for the chip mounting.
- Figure 6 shows a portion of the transponder of Fig. 5 where the wire bonding is displaced on the antenna extremities.
- Fig 2 shows in a simplified manner a 13.56Mhz transponder using a high Q factor coil.
- Fig 3 shows a higher frequency transponder, for example a 900MHz transponder, using a dipole antenna.
- 5 represents the lead frame (LF), 6 the antenna, 7 the ASIC and 8 the wire bonding interconnection in-between the ASIC and the antenna ends 10a and 10b.
- the ASIC 7 is placed on a specific portion 11 of the lead frame 5.
- Fig. 4 shows a one pole antenna with ground plane.
- the lead frame can be formed into a parable reflector, the ASIC together with its antenna are placed at the parable home.
- a multi frequency transponder can be obtained.
- the lead frames of Fig. 2 and Fig. 3 can be combined and packaged together to form one single part which uses at least one ASIC.
- the system can be used for the packaging.
- the most efficient packaging methods to be used are:
- the transfer moulding the lead frame 5 on which the chip 7 is attached is placed in a lower mould cavity, the upper mould cavity is closed. An injection material pellet is then compressed by an injection piston. Under heat and pressure application the injection material flows through a gate to fill up the mould cavity.
- the lead frame 5 on which the chip 3 is attached is placed in-between an upper and a lower mould cavity.
- the injected material is compressed into the mould cavity by an injection snail through a gate to form the final part.
- the lead frame 5 on which the chip 7 is attached is placed on top of a mould in which is made a cavity in which is dispensed a potting material through a dispensing nozzle to form the final part.
- the lead frame 5 can be a single part, a short stripe or even a complete roll of material comprising several parts.
- the antenna shape has to be adapted for each frequency band where the transponder will be used.
- This can be a coil 6 as shown in Fig. 2 where both ends 10a, 10b of the coil are prepared to accept a common wire bonding to connect coil to chip 7.
- Lead frame material The material used as lead frame has to be a conductive material, a very common material which could be used for the design of Fig. 2 is CuFe2.
- the material can be coated, e.g. with silver, to decrease the losses.
- the interconnection areas (10a, 10b) can be gold plated.
- the lead frame shape should be designed so that the chip can be placed on a flat surface 11 as shown in Fig. 5. This avoids inducing stress into the ASIC during the manufacturing steps and even during its functional life.
- the thickness of the used lead frame layers have to be chosen according to the needed performance of the antenna, as for the mechanical stability of the antenna to support the further packaging. For example, for 13.56MHz application, the thicker is the lead frame, the higher will be the Q factor of the transponder.
- the interconnection of the ASIC to the antenna can be made by wire bonding, which is more interesting for 13.56MHz applications where the bond is used as bridge in-between both antenna ends. Other methods as used in flip-chip interconnection may also be used.
- FIG. 6 shows the effect of displacing the bonding place on the antenna extremity.
- a first position 8a corresponds to a high SFR.
- a second position 8b to a nominal SFR and a third position 8c to a low SFR.
- lead frames By using a plurality of lead frames, some of them have to be mechanically and or electrically interconnected. This can be done by crimping, Ultrasonic welding, thermo-compression or even by using a third element a solder, non-conductive glue or conductive glue.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Power Engineering (AREA)
- Details Of Aerials (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2001/000438 WO2003007232A1 (en) | 2001-07-12 | 2001-07-12 | Lead frame antenna |
EP01944868A EP1405258A1 (en) | 2001-07-12 | 2001-07-12 | Lead frame antenna |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/CH2001/000438 WO2003007232A1 (en) | 2001-07-12 | 2001-07-12 | Lead frame antenna |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003007232A1 true WO2003007232A1 (en) | 2003-01-23 |
Family
ID=4358223
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CH2001/000438 WO2003007232A1 (en) | 2001-07-12 | 2001-07-12 | Lead frame antenna |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1405258A1 (en) |
WO (1) | WO2003007232A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1628245A1 (en) * | 2004-08-17 | 2006-02-22 | Sony DADC Austria AG | Package, method for producing a package and a device for producing a package |
DE102004030915A1 (en) * | 2004-06-25 | 2006-04-20 | Conti Temic Microelectronic Gmbh | Electrical module antenna and circuit carrier e.g. for high frequency transmission path, uses stamped-grid structure as circuit carrier |
DE102004059395A1 (en) * | 2004-12-09 | 2006-06-14 | Siemens Ag | Transmitting and / or receiving device |
WO2006099713A1 (en) * | 2005-03-23 | 2006-09-28 | Sige Semiconductor Inc. | Device and applications for passive rf components in leadframes |
WO2006120287A1 (en) * | 2005-05-12 | 2006-11-16 | Valtion Teknillinen Tutkimuskeskus | Antenna construction, for example for an rfid transponder system |
WO2007065132A1 (en) * | 2005-12-02 | 2007-06-07 | University Of Florida Research Foundation, Inc. | Compact integrated monopole antennas |
US7578053B2 (en) | 2004-12-03 | 2009-08-25 | Hallys Corporation | Interposer bonding device |
CN105633556A (en) * | 2016-03-07 | 2016-06-01 | 上海安费诺永亿通讯电子有限公司 | Near field communication (NFC) device and mobile terminal based on same |
US9495632B2 (en) | 2001-02-02 | 2016-11-15 | Avery Dennison Corporation | RFID label technique |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5420757A (en) * | 1993-02-11 | 1995-05-30 | Indala Corporation | Method of producing a radio frequency transponder with a molded environmentally sealed package |
WO1997012263A2 (en) * | 1995-09-29 | 1997-04-03 | Siemens Aktiengesellschaft | Transponder and transponder production method |
EP0996082A1 (en) * | 1998-02-13 | 2000-04-26 | Shinko Electric Industries Co. Ltd. | Ic card and its frame |
-
2001
- 2001-07-12 WO PCT/CH2001/000438 patent/WO2003007232A1/en not_active Application Discontinuation
- 2001-07-12 EP EP01944868A patent/EP1405258A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5420757A (en) * | 1993-02-11 | 1995-05-30 | Indala Corporation | Method of producing a radio frequency transponder with a molded environmentally sealed package |
WO1997012263A2 (en) * | 1995-09-29 | 1997-04-03 | Siemens Aktiengesellschaft | Transponder and transponder production method |
EP0996082A1 (en) * | 1998-02-13 | 2000-04-26 | Shinko Electric Industries Co. Ltd. | Ic card and its frame |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9495632B2 (en) | 2001-02-02 | 2016-11-15 | Avery Dennison Corporation | RFID label technique |
DE102004030915A1 (en) * | 2004-06-25 | 2006-04-20 | Conti Temic Microelectronic Gmbh | Electrical module antenna and circuit carrier e.g. for high frequency transmission path, uses stamped-grid structure as circuit carrier |
EP1628245A1 (en) * | 2004-08-17 | 2006-02-22 | Sony DADC Austria AG | Package, method for producing a package and a device for producing a package |
US7578053B2 (en) | 2004-12-03 | 2009-08-25 | Hallys Corporation | Interposer bonding device |
DE102004059395A1 (en) * | 2004-12-09 | 2006-06-14 | Siemens Ag | Transmitting and / or receiving device |
WO2006099713A1 (en) * | 2005-03-23 | 2006-09-28 | Sige Semiconductor Inc. | Device and applications for passive rf components in leadframes |
WO2006120287A1 (en) * | 2005-05-12 | 2006-11-16 | Valtion Teknillinen Tutkimuskeskus | Antenna construction, for example for an rfid transponder system |
US7724143B2 (en) | 2005-05-12 | 2010-05-25 | Valtion Teknillinen Tutkimuskeskus | Antenna construction, for example for an RFID transponder system |
WO2007065132A1 (en) * | 2005-12-02 | 2007-06-07 | University Of Florida Research Foundation, Inc. | Compact integrated monopole antennas |
CN105633556A (en) * | 2016-03-07 | 2016-06-01 | 上海安费诺永亿通讯电子有限公司 | Near field communication (NFC) device and mobile terminal based on same |
Also Published As
Publication number | Publication date |
---|---|
EP1405258A1 (en) | 2004-04-07 |
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