CA2048649A1 - Electromagnetic shield for electrical circuit - Google Patents

Electromagnetic shield for electrical circuit

Info

Publication number
CA2048649A1
CA2048649A1 CA2048649A CA2048649A CA2048649A1 CA 2048649 A1 CA2048649 A1 CA 2048649A1 CA 2048649 A CA2048649 A CA 2048649A CA 2048649 A CA2048649 A CA 2048649A CA 2048649 A1 CA2048649 A1 CA 2048649A1
Authority
CA
Canada
Prior art keywords
shield
circuit board
circuit
electromagnetic shield
electrical circuit
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2048649A
Other languages
French (fr)
Other versions
CA2048649C (en
Inventor
Jeffrey Frank Kurgan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Motorola Solutions Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2048649A1 publication Critical patent/CA2048649A1/en
Application granted granted Critical
Publication of CA2048649C publication Critical patent/CA2048649C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007Casings
    • H05K9/002Casings with localised screening
    • H05K9/0022Casings with localised screening of components mounted on printed circuit boards [PCB]
    • H05K9/0024Shield cases mounted on a PCB, e.g. cans or caps or conformal shields
    • H05K9/0032Shield cases mounted on a PCB, e.g. cans or caps or conformal shields having multiple parts, e.g. frames mating with lids
    • H05K9/0035Shield cases mounted on a PCB, e.g. cans or caps or conformal shields having multiple parts, e.g. frames mating with lids with retainers mounted beforehand on the PCB, e.g. clips
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B15/00Suppression or limitation of noise or interference
    • H04B15/02Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S174/00Electricity: conductors and insulators
    • Y10S174/35Box or housing mounted on substrate or PCB

Abstract

An electromagnetic shield for absorbing electromagnetic energy generated by a circuit disposed upon a circuit board.
The shield is comprised of a thermally conductive material to further provide heat-sink capabilities. Clip members releasably fastened to a flange projecting from a shielding surface formed by the shield are aligned with the ground plane of a circuit board. By maintaining the shield in a confronting relationship with the circuit board, the clip members are caused to maintain the shielding surface in electrical contact with the circuit.
CA002048649A 1990-03-30 1991-03-14 Electromagnetic shield for electrical circuit Expired - Fee Related CA2048649C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US502,365 1990-03-30
US07/502,365 US5053924A (en) 1990-03-30 1990-03-30 Electromagnetic shield for electrical circuit

Publications (2)

Publication Number Publication Date
CA2048649A1 true CA2048649A1 (en) 1991-10-01
CA2048649C CA2048649C (en) 1996-04-16

Family

ID=23997482

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002048649A Expired - Fee Related CA2048649C (en) 1990-03-30 1991-03-14 Electromagnetic shield for electrical circuit

Country Status (14)

Country Link
US (1) US5053924A (en)
JP (1) JP2596217B2 (en)
CN (1) CN1050495C (en)
AU (1) AU631984B2 (en)
BR (1) BR9105657A (en)
CA (1) CA2048649C (en)
DE (1) DE4190697C1 (en)
FR (1) FR2660516B1 (en)
GB (1) GB2249671B (en)
HU (1) HU210445B (en)
IT (1) IT1244945B (en)
MX (1) MX169539B (en)
PL (1) PL166497B1 (en)
WO (1) WO1991015939A1 (en)

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CA2084499C (en) * 1992-02-12 1998-11-03 William F. Weber Emi shield apparatus and methods
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WO1994019874A1 (en) * 1993-02-26 1994-09-01 Motorola Inc. Radio frequency shielding method and apparatus
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US5557063A (en) * 1994-01-03 1996-09-17 Lucent Technologies Inc. Electronic component enclosure for RF shielding
US5726867A (en) * 1994-01-21 1998-03-10 The Whitaker Corporation Card holder for computers and related equipment
DE9404266U1 (en) * 1994-03-14 1994-05-19 Siemens Nixdorf Inf Syst Cooling and shielding device for an integrated circuit
JPH0818265A (en) * 1994-06-29 1996-01-19 Molex Inc Method of shielding electromagnetic wave, etc. on printed circuit board and shield cover therefor
FI103935B1 (en) * 1994-09-07 1999-10-15 Nokia Mobile Phones Ltd A method for attaching an EMC shield to a circuit board and an EMC shield
DE69508911T2 (en) * 1994-11-28 1999-10-07 Toshiba Kawasaki Kk Housing with electromagnetic shielding
JP3338976B2 (en) * 1995-07-27 2002-10-28 モレックス インコーポレーテッド Connection terminal for electromagnetic shield
US5596487A (en) * 1995-07-31 1997-01-21 Motorola, Inc. Apparatus for RF shielding radio circuitry
US5650615A (en) * 1995-08-29 1997-07-22 Xerox Corporation Electromagnetic emission shielding of an image aperture opening for a digital scanner
US6242690B1 (en) 1995-09-25 2001-06-05 Ericsson Inc. Gasket system for EMI isolation
US5748455A (en) * 1996-04-23 1998-05-05 Ericsson, Inc. Electromagnetic shield for a radiotelephone
US5759049A (en) * 1996-05-15 1998-06-02 Dallas Semiconductor Corp. Electrical contact clip
DE29612557U1 (en) * 1996-07-19 1996-09-12 Nokia Mobile Phones Ltd Shielding device against electromagnetic radiation
SE507255C2 (en) * 1996-08-22 1998-05-04 Ericsson Telefon Ab L M Screen Protectors
EP0825810B1 (en) * 1996-08-23 1999-11-03 Asea Brown Boveri AG Housing for an electronic apparatus with a venting arrangement
EP0965255B2 (en) 1997-03-05 2010-10-20 Bernd Tiburtius Method for producing a shielding case
JPH1131909A (en) * 1997-05-14 1999-02-02 Murata Mfg Co Ltd Mobile communication device
US6122178A (en) * 1997-11-25 2000-09-19 Raytheon Company Electronics package having electromagnetic interference shielding
US6180876B1 (en) 1997-12-29 2001-01-30 Research In Motion Limited Apparatus and method for RF shielding of a printed circuit board
US6366380B1 (en) 1999-02-12 2002-04-02 Cisco Technology, Inc Optical transceiver EMI detuning device
US6583987B2 (en) * 1999-02-26 2003-06-24 Intel Corporation Electromagnetic interference and heatsinking
US6219239B1 (en) * 1999-05-26 2001-04-17 Hewlett-Packard Company EMI reduction device and assembly
US6278615B1 (en) * 1999-06-30 2001-08-21 International Business Machines Corporation Heatsink grounding spring and shield apparatus
JP3333761B2 (en) * 1999-09-10 2002-10-15 株式会社ソニー・コンピュータエンタテインメント Electronic device having shield and shield member
US6243265B1 (en) * 1999-10-06 2001-06-05 Intel Corporation Processor EMI shielding
US6259609B1 (en) 2000-03-15 2001-07-10 Arthur A. Kurz Shielding contactor construction
JP2002094689A (en) * 2000-06-07 2002-03-29 Sony Computer Entertainment Inc Program execution system, program execution device, relay device, and recording medium
EP1207733A1 (en) * 2000-11-20 2002-05-22 LK Engineering A/S Method of manufacturing items with bend projections
EP1207734A1 (en) * 2000-11-20 2002-05-22 LK Engineering A/S Method of manufacturing items with bend projections
US7005573B2 (en) 2003-02-13 2006-02-28 Parker-Hannifin Corporation Composite EMI shield
US7326862B2 (en) * 2003-02-13 2008-02-05 Parker-Hannifin Corporation Combination metal and plastic EMI shield
US7310067B1 (en) * 2006-05-23 2007-12-18 Research In Motion Limited Mobile wireless communications device with reduced interfering RF energy into RF metal shield secured on circuit board
US20080002384A1 (en) * 2006-06-30 2008-01-03 Motorola, Inc. Apparatus for providing radio frequency shielding and heat dissipation for electronic components
JP4844883B2 (en) * 2006-07-20 2011-12-28 日本電気株式会社 Electronic device and printed circuit board GND connection method
US20090002949A1 (en) * 2007-06-29 2009-01-01 Lucent Technologies Inc. Heat transfer for electronic component via an electromagnetic interference (emi) shield having shield deformation
JP2013038243A (en) * 2011-08-09 2013-02-21 Kyocera Corp Shield structure and portable terminal
US9332680B2 (en) * 2013-03-15 2016-05-03 Autoliv Asp, Inc. Electrical gasket and electronic module having electrical gasket
KR101936700B1 (en) * 2013-04-25 2019-01-10 삼성전자주식회사 Shielding reinforcement device

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Also Published As

Publication number Publication date
CN1055456A (en) 1991-10-16
CA2048649C (en) 1996-04-16
FR2660516B1 (en) 1994-04-29
PL293012A1 (en) 1992-06-15
US5053924A (en) 1991-10-01
MX169539B (en) 1993-07-09
IT1244945B (en) 1994-09-13
CN1050495C (en) 2000-03-15
GB2249671B (en) 1994-01-05
HU210445B (en) 1995-04-28
ITRM910179A1 (en) 1992-09-19
JPH05501030A (en) 1993-02-25
GB9122862D0 (en) 1991-12-11
JP2596217B2 (en) 1997-04-02
WO1991015939A1 (en) 1991-10-17
ITRM910179A0 (en) 1991-03-19
PL166497B1 (en) 1995-05-31
HUT62133A (en) 1993-03-29
BR9105657A (en) 1992-05-19
DE4190697C1 (en) 1995-09-28
AU631984B2 (en) 1992-12-10
GB2249671A (en) 1992-05-13
FR2660516A1 (en) 1991-10-04
HU913689D0 (en) 1992-03-30
AU7545391A (en) 1991-10-30

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Legal Events

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