CA2136469A1 - Emi shielding having flexible conductive envelope - Google Patents

Emi shielding having flexible conductive envelope

Info

Publication number
CA2136469A1
CA2136469A1 CA002136469A CA2136469A CA2136469A1 CA 2136469 A1 CA2136469 A1 CA 2136469A1 CA 002136469 A CA002136469 A CA 002136469A CA 2136469 A CA2136469 A CA 2136469A CA 2136469 A1 CA2136469 A1 CA 2136469A1
Authority
CA
Canada
Prior art keywords
conductive fibers
flexible
envelope
opening
enclosure
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
CA002136469A
Other languages
French (fr)
Other versions
CA2136469C (en
Inventor
Gerald A. Annis
William C. Hoge, Jr.
Robert L. Welch
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.)
Schlegel Corp
Original Assignee
Schlegel Corp
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 Schlegel Corp filed Critical Schlegel Corp
Publication of CA2136469A1 publication Critical patent/CA2136469A1/en
Application granted granted Critical
Publication of CA2136469C publication Critical patent/CA2136469C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • 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
    • H05K9/0043—Casings being flexible containers, e.g. pouch, pocket, bag

Abstract

An electronic device such as a portable computer is shielded against electromagnetic interference using a flexible envelope that surrounds a circuit card within the housing of the device. The flexible envelope forms a shielding enclosure and has an electrically insulating flexible sheet, for example of polyethylene, and a sheet of conductive fibers embedded in the flexible sheet so as to leave a nonconductive face oriented toward the circuit card. The conductive fibers can be metallized nylon and are sufficiently dense to obtain a resistivity of 10-1 to 100-2 .OMEGA./~. The enclosure forms a hollow envelope with the conductive fibers coupled electrically across a seam, for example by cutting the flexible sheet and embedded fibers using heat. For use with a portable computer having a pivoting screen, a neck extension of the enclosure carries conductors through the area of the pivot. For access to circuit board elements, for example for changing or adding chips, an access opening is provided with a conductive extension that is movable to overlap the opening or to expose the opening. The flexible envelope can be joined to a circuit ground by clamping conductive fibers on an exposed face to a metal connector panel of the device.
CA002136469A 1993-12-16 1994-11-23 Emi shielding having flexible conductive envelope Expired - Fee Related CA2136469C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/168,939 1993-12-16
US08/168,939 US5436803A (en) 1993-12-16 1993-12-16 Emi shielding having flexible conductive envelope

Publications (2)

Publication Number Publication Date
CA2136469A1 true CA2136469A1 (en) 1995-06-17
CA2136469C CA2136469C (en) 2003-07-08

Family

ID=22613600

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002136469A Expired - Fee Related CA2136469C (en) 1993-12-16 1994-11-23 Emi shielding having flexible conductive envelope

Country Status (10)

Country Link
US (1) US5436803A (en)
EP (1) EP0659041B1 (en)
JP (1) JP2925130B2 (en)
KR (1) KR0180258B1 (en)
AU (1) AU674454B2 (en)
CA (1) CA2136469C (en)
DE (1) DE69410416T2 (en)
MY (1) MY112711A (en)
SG (1) SG42892A1 (en)
TW (1) TW236072B (en)

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Also Published As

Publication number Publication date
EP0659041A1 (en) 1995-06-21
DE69410416T2 (en) 1998-09-24
JP2925130B2 (en) 1999-07-28
AU674454B2 (en) 1996-12-19
KR950023264A (en) 1995-07-28
MY112711A (en) 2001-08-30
CA2136469C (en) 2003-07-08
KR0180258B1 (en) 1999-05-15
TW236072B (en) 1994-12-11
US5436803A (en) 1995-07-25
JPH07202466A (en) 1995-08-04
EP0659041B1 (en) 1998-05-20
DE69410416D1 (en) 1998-06-25
AU7775094A (en) 1995-06-22
SG42892A1 (en) 1997-10-17

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Legal Events

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EEER Examination request
MKLA Lapsed