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WO2004032580A3 - Emi-absorbing air filter - Google Patents

Emi-absorbing air filter Download PDF

Info

Publication number
WO2004032580A3
WO2004032580A3 PCT/US2003/031119 US0331119W WO2004032580A3 WO 2004032580 A3 WO2004032580 A3 WO 2004032580A3 US 0331119 W US0331119 W US 0331119W WO 2004032580 A3 WO2004032580 A3 WO 2004032580A3
Authority
WO
WIPO (PCT)
Prior art keywords
emi
absorbing
air
absorptive
air filter
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.)
Ceased
Application number
PCT/US2003/031119
Other languages
French (fr)
Other versions
WO2004032580A2 (en
WO2004032580B1 (en
Inventor
Richard Norman Johnson
Haaster Philip Van
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.)
Laird Technologies Inc
Original Assignee
Laird Technologies Inc
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 Laird Technologies Inc filed Critical Laird Technologies Inc
Priority to AU2003279736A priority Critical patent/AU2003279736A1/en
Priority to US10/530,110 priority patent/US7338547B2/en
Publication of WO2004032580A2 publication Critical patent/WO2004032580A2/en
Publication of WO2004032580A3 publication Critical patent/WO2004032580A3/en
Publication of WO2004032580B1 publication Critical patent/WO2004032580B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007—Casings
    • H05K9/0041—Ventilation panels having provisions for screening

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Filtering Materials (AREA)

Abstract

Electromagnetic-energy absorbing materials are used to treat air filters (300), such as those used in association with electronic equipment thereby suppressing the transmission of electromagnetic interference (EMI) therethrough. Disclosed are processes and materials for applying EMI-absorbing materials to air filters thereby improving EMI-shielding effectiveness in an economically efficient manner. In one embodiment, an absorptive solution (110) is prepared using an absorptive material and a binding agent. A heavy coating of absorbing solution is applied (120) to an air filter substrate (100), for example by dipping or spraying. Excess absorbing material is subsequently removed (130) and the absorbing material cured (140), such that the passage of air through the filter remains substantially unimpeded. The resulting absorptive air filter is then optionally treated (160) with a flame retardant to meet a predetermined safety standard.
PCT/US2003/031119 2002-10-03 2003-10-02 Emi-absorbing air filter Ceased WO2004032580A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2003279736A AU2003279736A1 (en) 2002-10-03 2003-10-02 Emi-absorbing air filter
US10/530,110 US7338547B2 (en) 2003-10-02 2003-10-02 EMI-absorbing air filter

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US41592402P 2002-10-03 2002-10-03
US60/415,924 2002-10-03

Publications (3)

Publication Number Publication Date
WO2004032580A2 WO2004032580A2 (en) 2004-04-15
WO2004032580A3 true WO2004032580A3 (en) 2004-05-13
WO2004032580B1 WO2004032580B1 (en) 2004-07-22

Family

ID=32069920

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2003/031119 Ceased WO2004032580A2 (en) 2002-10-03 2003-10-02 Emi-absorbing air filter

Country Status (3)

Country Link
AU (1) AU2003279736A1 (en)
TW (1) TWI279248B (en)
WO (1) WO2004032580A2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI258771B (en) 2001-12-04 2006-07-21 Laird Technologies Inc Methods and apparatus for EMI shielding
US8421045B2 (en) * 2011-08-26 2013-04-16 Bha Group, Inc. Electromagnetic protection cloth
US9622338B2 (en) 2013-01-25 2017-04-11 Laird Technologies, Inc. Frequency selective structures for EMI mitigation
KR102137416B1 (en) * 2017-04-21 2020-07-24 단국대학교 천안캠퍼스 산학협력단 Membrane Comprising Porous Substrate Layer and CNT/Chitosan Nano Hybrid Coating Layer and Electrostatic Dust Collector System Comprising the Same
CN113045263B (en) * 2021-03-18 2022-11-08 西南石油大学 A kind of hybrid fiber cement-based foam composite wave absorbing material and preparation method thereof

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546359A (en) * 1969-06-18 1970-12-08 Gichner Mobile Systems Inc Rfi shielded vent
US5431974A (en) * 1993-12-16 1995-07-11 Pierce; Patricia Electromagnetic radiation shielding filter assembly
US5506047A (en) * 1991-10-23 1996-04-09 W. L. Gore & Associates, Inc. Electromagnetic interfernce shielding filter
US5519168A (en) * 1993-10-12 1996-05-21 Owens; William M. Electromagnetic interference shielding
US6063152A (en) * 1997-02-19 2000-05-16 Marconi Communications Inc. Tuned electromagnetic interference air filter
US6171357B1 (en) * 1999-01-04 2001-01-09 Eci Telecom Ltd. Air filter
US6211458B1 (en) * 1998-02-17 2001-04-03 Parker-Hannifin Corporation EMI shielded vent panel and method
US6426459B1 (en) * 1999-08-17 2002-07-30 Parker-Hannifin Corporation EMI shielding vent panel for high volume applications
US6552900B1 (en) * 1999-04-13 2003-04-22 Siemens Aktiengesellschaft Device for cooling an electric module and a technical appliance
US20030085050A1 (en) * 2001-09-04 2003-05-08 Shielding For Electronics, Inc. EMI air filter

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3546359A (en) * 1969-06-18 1970-12-08 Gichner Mobile Systems Inc Rfi shielded vent
US5506047A (en) * 1991-10-23 1996-04-09 W. L. Gore & Associates, Inc. Electromagnetic interfernce shielding filter
US5519168A (en) * 1993-10-12 1996-05-21 Owens; William M. Electromagnetic interference shielding
US5431974A (en) * 1993-12-16 1995-07-11 Pierce; Patricia Electromagnetic radiation shielding filter assembly
US6063152A (en) * 1997-02-19 2000-05-16 Marconi Communications Inc. Tuned electromagnetic interference air filter
US6211458B1 (en) * 1998-02-17 2001-04-03 Parker-Hannifin Corporation EMI shielded vent panel and method
US6171357B1 (en) * 1999-01-04 2001-01-09 Eci Telecom Ltd. Air filter
US6552900B1 (en) * 1999-04-13 2003-04-22 Siemens Aktiengesellschaft Device for cooling an electric module and a technical appliance
US6426459B1 (en) * 1999-08-17 2002-07-30 Parker-Hannifin Corporation EMI shielding vent panel for high volume applications
US20030085050A1 (en) * 2001-09-04 2003-05-08 Shielding For Electronics, Inc. EMI air filter

Also Published As

Publication number Publication date
AU2003279736A1 (en) 2004-04-23
AU2003279736A8 (en) 2004-04-23
WO2004032580A2 (en) 2004-04-15
TWI279248B (en) 2007-04-21
TW200418560A (en) 2004-10-01
WO2004032580B1 (en) 2004-07-22

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