EP1727161A1 - Masseverbindung für Flachkabelabschirmung. - Google Patents

Masseverbindung für Flachkabelabschirmung. Download PDF

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Publication number
EP1727161A1
EP1727161A1 EP05104333A EP05104333A EP1727161A1 EP 1727161 A1 EP1727161 A1 EP 1727161A1 EP 05104333 A EP05104333 A EP 05104333A EP 05104333 A EP05104333 A EP 05104333A EP 1727161 A1 EP1727161 A1 EP 1727161A1
Authority
EP
European Patent Office
Prior art keywords
cable
layer
electrically conductive
adhesive tape
ground cable
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.)
Withdrawn
Application number
EP05104333A
Other languages
English (en)
French (fr)
Inventor
Konrad Brandt
Joachim Goertz
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
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 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to EP05104333A priority Critical patent/EP1727161A1/de
Priority to JP2008513630A priority patent/JP2008542999A/ja
Priority to PCT/US2006/019950 priority patent/WO2006127723A2/en
Priority to CA002609658A priority patent/CA2609658A1/en
Priority to MX2007014649A priority patent/MX2007014649A/es
Priority to CNA2006800267660A priority patent/CN101228594A/zh
Priority to KR1020077028156A priority patent/KR20080014820A/ko
Priority to BRPI0610318-9A priority patent/BRPI0610318A2/pt
Publication of EP1727161A1 publication Critical patent/EP1727161A1/de
Priority to IL187554A priority patent/IL187554A0/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables
    • H01B7/0861—Flat or ribbon cables comprising one or more screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/06—Cables with twisted pairs or quads with means for reducing effects of electromagnetic or electrostatic disturbances, e.g. screens
    • H01B11/10—Screens specially adapted for reducing interference from external sources
    • H01B11/1091—Screens specially adapted for reducing interference from external sources with screen grounding means, e.g. drain wires
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
    • H01R12/50—Fixed connections
    • H01R12/59—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures
    • H01R12/594—Fixed connections for flexible printed circuits, flat or ribbon cables or like structures for shielded flat cable
    • H01R12/596—Connection of the shield to an additional grounding conductor, e.g. drain wire
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/04—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation using electrically conductive adhesives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
    • H01R9/05—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for coaxial cables
    • H01R9/0509—Tapping connections

Definitions

  • the present invention relates to the ground connection of a shielded flat cable.
  • Shielded flat cables are often used for signal transmissions in telecommunication and computer applications.
  • a shielded flat cable comprises a plurality of individual insulated wires arranged as a ribbon cable having at least one layer of adjacent insulated wires and an electrically conductive shielding layer surrounding the ribbon cable.
  • the shielding layer serves for preventing the signals transmitted via the individual wires of the ribbon cable from being affected by external noise or other external influences.
  • the shielded layer of a flat cable has to be electrically connected to a ground potential e.g. to the casing of an electronic equipment.
  • so-called pigtail and drain wire connections exist which comprise ground cables electrically connected to the shielding layer and to the ground potential.
  • JP-A-08077836 One example of a drain wire connection is disclosed in JP-A-08077836 .
  • a ground wire is arranged in electrical and mechanical contact with the shielding layer of a flat cable, wherein the ground wire extends parallel to the flat cable and projects beyond the connectors arranged at the ends of the flat cable. The ends of the ground wire are connected to a ground potential.
  • JP-A-06243731 discloses a ground cable soldered to a copper foil tape which is adhered to the shielding layer of a flat cable.
  • soldering a ground wire to the shielding layer of a flat cable is a commonly known technique for ground connection of the shielding layer of a flat cable.
  • soldering is disadvantageous in that the application of heat to the shielding layer may damage the ribbon cable underneath the shielding layer.
  • the electrical connection between the shielding layer and the ground cable is merely established at one location of the shielding layer (point-like connection). Finally, when the cable is bent, the soldering connection can be damaged and break.
  • a jacketed cable strain relief/grounding clamp is offered in the market, e.g, by 3M (see e.g. the 3504 series products). These products comprise two clamps for applying a clamping force to the shielded flat cable arranged therebetween. The two clamping elements are arranged at a cabinet wall adjacent an opening through which the flat cable extends.
  • a shielded flat cable comprising
  • the ground cable comprises a conductor formed so as to comprise at least a first and a second portion, with the second portion being folded back with respect to the first portion. At least one of these two portions at least partially is free of an insulation jacket which may surround the conductor in the remaining part of the ground cable.
  • the folded back first and second portions are arranged between different pairs of adjacent layers of a superimposed layer arrangement comprising the shielding layer of the ribbon cable of the shielded flat cable and at least two electrically conductive layers of an electrically conductive adhesive tape.
  • the ground cable is connected to the shielding layer of the ribbon cable by performing the following steps:
  • the conductor of the ground cable used in the present invention may comprise a solid single wire, a stranded or braided flat bend, or a plurality of individual twisted wires.
  • the conductor may be surrounded by an insulation jacket but also may be free of any insulation surrounding the conductor.
  • a conductive ribbon can be used as a ground conductor.
  • the conductor is folded back by bending the conductor by 180° at least once.
  • the conductor may comprise e.g. three or more portions within which the ground conductor is folded back so as to form a Z-shape or a zigzag folded shape.
  • the electrically conductive layers each comprise individual strips of an electrically conductive adhesive tape arranged on each other with the at least two portions of the ground cable arranged therebetween.
  • the individual electrically conductive layers are formed by wrapping the electrically conductive adhesive tape around the shielding layer of the ribbon cable. Prior to arranging the ground cable onto the shielded flat cable, several layers of the electrically conductive adhesive tape can be applied to the shielding layer. Further, after having fixed the last portion of the ground cable, more than one layer of the electrically conductive adhesive tape may be applied.
  • the first portion of the ground cable is directly placed onto the shielding layer of the ribbon cable so as to be fixed at the shielding layer by the first electrically conductive layer of the electrically conductive adhesive tape, with the second portion of the ground cable being fixed via a different one of the electrically conductive layers of the electrically conductive adhesive tape.
  • At least one of the portions of the conductor of the ground cable contacting the shielding layer and the electrically conductive layers has to be free of an insulation jacket.
  • the ground cable is free of insulation within all of its portions contacting the shielding and electrically conductive layers.
  • ground cable having a plurality of twisted individual wires which are fanned-out and folded back within the portions of the ground cable connecting the shielding and electrically conductive layer arrangement.
  • the electrically conductive adhesive tape used in accordance with the present invention typically comprises a metallic backing (e.g. made of copper) and an adhesive which most preferably is electrically conductive.
  • An electrically conductive adhesive tape suitable for the present invention is e.g. the copper foil with conductive adhesive as sold by 3M (e.g. 1181 series).
  • the shielding layer surrounding the ribbon cable of the shielded flat cable comprises a metal foil placed around the ribbon cable with lateral opposite ends overlapping each other.
  • the shielding layer can also comprise a braided layer made of individual wires or a mesh.
  • an insulation configured as an insulation adhesive tape wrapped around the shielded flat cable or by a heat shrink insulation tape.
  • Such an insulation provided around the connection further improves strain relief of the ground cable.
  • the present invention provides a ground connection for a shielded flat cable having a ribbon cable with at least one layer of a plurality of adjacent individual insulated wires, and an electrically conductive shielding layer surrounding the ribbon cable, the ground connection comprising
  • FIG. 1 A first embodiment of a shielded flat cable with a ground cable being connected and fixed thereto as well as the individual steps of making the electrical and mechanical connection between the shielded flat cable and the ground cable is shown in Figs. 1 to 13.
  • a shielded flat cable 10 having an outer insulation jacket 12 arranged around an electrically conductive shielding layer 14 of e.g. a copper foil which in turn is wrapped around a ribbon cable 16 comprising an insulation layer 18 in which a plurality of wires 20 are embedded (see also Figs. 2 and 12).
  • an electrically conductive shielding layer 14 of e.g. a copper foil which in turn is wrapped around a ribbon cable 16 comprising an insulation layer 18 in which a plurality of wires 20 are embedded (see also Figs. 2 and 12).
  • the outer insulation jacket 12 is removed at the one end 22 of the shielded flat cable 10. Thereafter, a portion of the thus exposed shielding layer 14 is removed so that the situation of Fig. 2 occurs in which an end portion of the ribbon cable 16 is exposed, followed by an exposed portion of the shielding layer 14, followed by the remaining portion of the shielded flat cable 10 with its outer jacket 12 arranged therearound.
  • the adhesive tape 24 comprises an electrically conductive backing 26 in the form of a copper foil and an electrically conductive adhesive layer 28 arranged on the one side of the electrically conductive backing 26.
  • the adhesive tape 24 is wound around the shielding layer 14 by more than one winding.
  • the adhesive tape 24 is wound by about 1 1/4 windings around the shielding layer 14 before a prepared ground cable 30 is placed onto the first winding of the adhesive tape 24 (see Fig. 6).
  • the ground cable 30 can also be placed directly onto the shielding layer 14.
  • the ground cable 30 comprises a conductor 32 having a plurality of individual wires 34 twisted with respect to each other.
  • the twisted wires 34 are arranged inside an outer insulation jacket 36 which is removed at the one end 38 of the ground cable 30 so that the individual wires 34 are exposed. Within this exposed end portions the individual wires 34 are fanned-out as shown in Fig. 6.
  • the fanned-out individual wires 34 are placed on the first winding of the adhesive tape 24, as shown in Fig. 6, with a first portion 40 of the individual wires 34 adjacent to the outer jacket 36 arranged on the first winding of the adhesive tape 24, while a second portion 42 of the individual wires 34 projects beyond the adhesive tape 24.
  • the adhesive tape 24 is wound around the shielding layer 14 by one further winding, thereby fixing the first portions 40 of the individual wires 34 of the ground cable 30 between the first and second windings of the adhesive tape 24.
  • the adhesive tape 24 can be wound around the shielding layer 14 by at least one further winding. This is not necessary for the electrical connection, but further strengthens the mechanical connection of the ground cable 30 to the shielded flat cable 10. Also, prior to placing the wires 34 of the conductor 32 of the ground cable 30 onto the adhesive tape 24 wound around the shielding layer 14 by at least one winding, the adhesive tape 24 may be wound around the shielding layer 14 by more than one winding in order to also further strengthen the shielding layer 14 underneath the wires 34 of the ground cable 30. Finally, also between the steps of placing the ground cable 30 onto the adhesive tape 24 (see Fig. 6) and folding back the projecting second portions 42 of the wires 34 (see Fig. 10), the adhesive tape 24 may be wound around the shielding layer 14 by more than one winding.
  • the connector 44 can be applied to the exposed end portion of the ribbon cable 16.
  • the connector 44 can be an insulation displacement connector (IDC).
  • IDC insulation displacement connector
  • Fig. 12 shows that the individual first and second portions 40,42 of the wires 34 of the ground cable 30 are arranged between different pairs of adhesive tape layers 46,48, and 50.
  • individual sections of an electrically conductive adhesive tape e.g. cut from the length of adhesive tape 24
  • the ground cable 30 is prepared in a different way.
  • the ground cable 30 according to the second embodiment of the invention comprises individual twisted wires 34 free from the outer insulation jacket 36 merely in one portion (second portion 42), while the portion of the ground cable 30 adjacent to the portion 42 of the wires 34 is provided with the outer insulation jacket 36 around the wires 34.
  • the individual wires 34 in their exposed (second) portions 42 are fixed by the adhesive tape 24 by further winding the tape 24 around the shielded flat cable 10 (see Figs. 15 and 16). Thereafter, as can be seen in Fig. 17, the ground cable 30 is folded back so that its portion 40 provided with the outer insulation jacket 36 is placed onto the outer layer of the adhesive tape 24. Thereafter, the ground cable 30 at its portion 40 is fixed by further applying adhesive tape 24, as can be seen from Fig. 18.
  • Fig. 21 shows a cross sectional view of a further embodiment of the present invention, wherein the ground cable 30 is z-folded so as to include three portions 40,42,54 in its section electrically and mechanically connected to the shielded flat cable 10 by means of the adhesive tape 24.
  • one of the portions of the ground cable 30 arranged between adjacent layers 50,56 of the adhesive tape 24 is still provided with the outer insulation jacket 36. Also, in this portion the outer jacket 36 of the ground cable 30 could be removed.
  • the number of layers of adhesive tape 24 between the individual adjacent portions of the ground cable 30 is not limited to one layer but could also be more than one layer.
  • further material e.g. insulating material
  • strain relief can be improved.
  • a protection against environmental influences is provided. In the embodiment of Fig, 21 this protection is provided by a heat shrinkable insulation material 58 arranged around the superimposed layer arrangement 52.
  • Fig. 22 shows a prefabricated ground cable connection similar to that as shown in Figs, 19 and 20 but with superimposed individual layers 46,48,50 formed by arranging electrically conductive adhesive strips one on each other.
  • This superimposed layer arrangement with the first and second portions 40,42 of the ground cable 30 already arranged therebetween, can be provided with a protective release liner 60 releasable from the adhesive of the lowermost strip of the electrically conductive adhesive layer 46.
  • the superimposed strips can be longer than the width of the shielding layer 14 surrounding the ribbon cable 16 so that the superimposed strips at their end can be bent around the shielded flat cable (see arrows 62 in Fig. 22).

Landscapes

  • Insulated Conductors (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
EP05104333A 2005-05-23 2005-05-23 Masseverbindung für Flachkabelabschirmung. Withdrawn EP1727161A1 (de)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP05104333A EP1727161A1 (de) 2005-05-23 2005-05-23 Masseverbindung für Flachkabelabschirmung.
JP2008513630A JP2008542999A (ja) 2005-05-23 2006-05-23 フラットケーブルのシールド接地接続
PCT/US2006/019950 WO2006127723A2 (en) 2005-05-23 2006-05-23 Flat cable shield ground connection
CA002609658A CA2609658A1 (en) 2005-05-23 2006-05-23 Flat cable shield ground connection
MX2007014649A MX2007014649A (es) 2005-05-23 2006-05-23 Conexion a tierra de blindaje de cable plano.
CNA2006800267660A CN101228594A (zh) 2005-05-23 2006-05-23 扁平电缆屏蔽接地线路
KR1020077028156A KR20080014820A (ko) 2005-05-23 2006-05-23 플랫 케이블 실드 접지 접속부
BRPI0610318-9A BRPI0610318A2 (pt) 2005-05-23 2006-05-23 conexão terra pra blindagem de cabo chato
IL187554A IL187554A0 (en) 2005-05-23 2007-11-22 Flat cable shield ground connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05104333A EP1727161A1 (de) 2005-05-23 2005-05-23 Masseverbindung für Flachkabelabschirmung.

Publications (1)

Publication Number Publication Date
EP1727161A1 true EP1727161A1 (de) 2006-11-29

Family

ID=35057188

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05104333A Withdrawn EP1727161A1 (de) 2005-05-23 2005-05-23 Masseverbindung für Flachkabelabschirmung.

Country Status (9)

Country Link
EP (1) EP1727161A1 (de)
JP (1) JP2008542999A (de)
KR (1) KR20080014820A (de)
CN (1) CN101228594A (de)
BR (1) BRPI0610318A2 (de)
CA (1) CA2609658A1 (de)
IL (1) IL187554A0 (de)
MX (1) MX2007014649A (de)
WO (1) WO2006127723A2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011198687A (ja) * 2010-03-23 2011-10-06 Sumitomo Electric Ind Ltd フラットケーブル
US20140060882A1 (en) * 2012-08-31 2014-03-06 Tyco Electronics Corporation Communication cable having at least one insulated conductor

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602007007179D1 (de) * 2007-02-12 2010-07-29 Alcatel Lucent Verfahren zur Kontaktierung eines elektrischen Leiters und flexibles Element zur Herstellung eines elektrischen Kontaktes
KR101056324B1 (ko) * 2009-03-09 2011-08-11 스미토모 덴키 고교 가부시키가이샤 시일드 플랫 케이블
TWI397085B (zh) * 2009-03-10 2013-05-21 Sumitomo Electric Industries 屏蔽扁平電纜
CN102682892B (zh) * 2011-03-09 2015-05-27 富士康(昆山)电脑接插件有限公司 线缆
CN103474172A (zh) * 2012-06-08 2013-12-25 住友电气工业株式会社 电缆的制造方法以及电缆
KR102053271B1 (ko) * 2017-12-29 2019-12-06 주식회사 유라코퍼레이션 고전압 케이블의 차폐접지부 및 그 제조방법
CN112042062B (zh) * 2018-04-27 2022-03-18 住友电气工业株式会社 连接器和基板
CN108551010A (zh) * 2018-05-30 2018-09-18 深圳市鼎电精密工业有限公司 一种线缆与pcb板的连接结构
SE543838C2 (en) * 2019-12-19 2021-08-10 Roxtec Ab Transit for passing at least one cable and/or at least one metallic pipe
CN111106457B (zh) * 2019-12-31 2022-01-28 国网上海市电力公司 一种35kV单芯电缆的接地方法及接地装置
TWI784392B (zh) * 2020-01-14 2022-11-21 美商莫仕有限公司 接地屏蔽線纜及相關方法及組件
DE102020103811A1 (de) 2020-02-13 2021-08-19 Kromberg & Schubert GmbH Cable & Wire Geschirmte Flachleitung
CN111968536B (zh) * 2020-09-09 2022-06-10 武汉华星光电半导体显示技术有限公司 屏蔽带及显示模组的制备方法
WO2022158623A1 (ko) * 2021-01-25 2022-07-28 주성철 플렉시블 플랫 케이블(ffc) 랩핑 방법 및 장치
CN113241217A (zh) * 2021-05-12 2021-08-10 三门核电有限公司 一种电缆屏蔽全周接地方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737598A (en) * 1984-12-17 1988-04-12 Oconnor Lawrence Shielding tape for electrical conductors
US20010045296A1 (en) * 2000-05-19 2001-11-29 Bailey George R. Multiple shielded cable
US20020170729A1 (en) * 2001-05-18 2002-11-21 Yazaki Corporation Conductive thin film sheet, shield harness and method of manufacturing the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4737598A (en) * 1984-12-17 1988-04-12 Oconnor Lawrence Shielding tape for electrical conductors
US20010045296A1 (en) * 2000-05-19 2001-11-29 Bailey George R. Multiple shielded cable
US20020170729A1 (en) * 2001-05-18 2002-11-21 Yazaki Corporation Conductive thin film sheet, shield harness and method of manufacturing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011198687A (ja) * 2010-03-23 2011-10-06 Sumitomo Electric Ind Ltd フラットケーブル
US20140060882A1 (en) * 2012-08-31 2014-03-06 Tyco Electronics Corporation Communication cable having at least one insulated conductor
WO2014035678A1 (en) * 2012-08-31 2014-03-06 Tyco Electronics Corporation Communication cable having at least one insulated conductor

Also Published As

Publication number Publication date
IL187554A0 (en) 2008-03-20
WO2006127723A2 (en) 2006-11-30
BRPI0610318A2 (pt) 2010-06-15
CN101228594A (zh) 2008-07-23
WO2006127723A3 (en) 2007-01-25
KR20080014820A (ko) 2008-02-14
MX2007014649A (es) 2008-02-11
JP2008542999A (ja) 2008-11-27
CA2609658A1 (en) 2006-11-30

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