EP0961298A1 - Faisceau de fils de signaux électriques - Google Patents

Faisceau de fils de signaux électriques Download PDF

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Publication number
EP0961298A1
EP0961298A1 EP98109838A EP98109838A EP0961298A1 EP 0961298 A1 EP0961298 A1 EP 0961298A1 EP 98109838 A EP98109838 A EP 98109838A EP 98109838 A EP98109838 A EP 98109838A EP 0961298 A1 EP0961298 A1 EP 0961298A1
Authority
EP
European Patent Office
Prior art keywords
electrical signal
bundle
insulator
signal bundle
conductors
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
EP98109838A
Other languages
German (de)
English (en)
Other versions
EP0961298B1 (fr
Inventor
Helmut Siegerschmidt
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.)
WL Gore and Associates GmbH
WL Gore and Associates Inc
Original Assignee
WL Gore and Associates GmbH
WL Gore and Associates 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 WL Gore and Associates GmbH, WL Gore and Associates Inc filed Critical WL Gore and Associates GmbH
Priority to EP98109838A priority Critical patent/EP0961298B1/fr
Priority to AT98109838T priority patent/ATE205958T1/de
Priority to DE69801741T priority patent/DE69801741T2/de
Priority to DK98109838T priority patent/DK0961298T3/da
Publication of EP0961298A1 publication Critical patent/EP0961298A1/fr
Application granted granted Critical
Publication of EP0961298B1 publication Critical patent/EP0961298B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01B7/0892—Flat or ribbon cables incorporated in a cable of non-flat configuration
    • 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
    • H01B7/0838—Parallel wires, sandwiched between two insulating layers

Definitions

  • the invention relates to an electrical cable having an electrical signal bundle for placing within an outer jacket.
  • US-A-4 847 443 assigned to the Amphenol Corporation teaches another example of an electrical signal line cable formed from a plurality of generally flat electrical signal line segments stacked together in an interlocking relationship.
  • Each electrical signal line segment of this prior art cable contains at least one signal conductor surrounded on either side by ground conductors.
  • the plurality of ground conductors effectively form a ground plane which inhibit the cross-talk between the adjacent signal conductors.
  • the insulating materials in which the conductors are disposed is extruded over the individual signal conductors.
  • European Patent EP-B-0 605 600 (Springer et al.) assigned to the Minnesota Mining and Manufacturing Company teaches a ribbon cable and a lamination method for manufacturing the same.
  • the ribbon cable manufactured comprises a plurality of evenly spaced flexible conductors surrounded by an insulator which is a microporous polypropylene.
  • PCT patent application WO-A-91/09406 (Ritchie et al) teaches an electrical wiring composed of elongated electrically conductive metal foil strips laminated between opposing layers of insulating films by means of adhesive securing the foil strips between the laminating films.
  • German patent application DE-A-24 24 442 assigned to Siemens teaches a cable assembly which comprises a plurality of flat cables laminated between insulating films.
  • PCT patent application WO-A-80/00389 assigned to Square D company of Palatine, Illinois, teaches an input/output data cable for use with programmable controllers.
  • the cable has a ground conductor, a logic level voltage conductor and a number of signal tracks.
  • the conductors are disposed on two or three layers of flexible plastics material in specified ways to give high immunity to interference and low inductive losses. The layers are glued together to form a laminate structure.
  • an electrical signal bundle for placing within an outer jacket and a plurality of coplanar electrical signal conductors encased within an insulator and which form a bundle assembly.
  • the insulator has an insulator top side and an insulator bottom side and a shielding strip is placed on one of the insulator top side or the insulator bottom side.
  • the bundle assembly is helically twisted around a central axis and at least one of the said electrical signal conductors has a characteristic impedance in the range of 80 to 200 ⁇ .
  • the encasing of the plurality of coplanar electrical signal conductors in an insulator allows the electrical signal conductors to be easily manipulated and connected to a termination board.
  • the shielding strip is used to shield at least some of the conductors from interfering electromagnetic field which are generated outside of the bundle or are generated by signals passing through other ones of the signal conductors.
  • the shielding strip is advantageously made from the group of electrically conducting compounds consisting of metallised textile, a metal layer, metal foil, metal braid, conducting fluoropolymer filled with metal particles or a combination thereof.
  • the metal is copper, aluminium, gold or silver or an alloy thereof and most preferably the metal is copper.
  • the insulator comprises an upper insulator attached to a lower insulator. This allows the signal conductors to be placed on the surface of one of the insulators in a defined position and then the other insulator is placed on top of the conductors to hold them in a fixed position.
  • the upper insulator is laminated to said lower insulator.
  • other attachment methods such as the use of adhesive can be used. It is, of course, possible to extrude the insulation with the signal conductors.
  • the upper insulator and said lower insulator are formed from the group of insulating materials consisting of perfluoralkoxy, fluoroethylene-propylene, polyolefin including polypropylene and polyethylene, polymethylpentene, polytetrafluoroethylene or expanded polytetrafluorethylene and most preferably from expanded polytetrafluorethylene (PTFE).
  • Expanded PTFE has a very low dielectric constant and, as a result, offers extremely good electrical signal properties to the bundle.
  • the shielding strip is attached to said insulator preferably by lamination although other methods such as the use of adhesives can be used.
  • electrical signal conductors are exposed at one end of the electrical signal bundle.
  • the electrical signal conductors have a pitch distance which is matched to the distance between termination points on said termination board. This allows simple connection of the individual termination points to the signal conductors within the bundle.
  • the electrical signal bundle of the invention can be advantageously used in a catheter.
  • Fig. 1 shows an electrical signal cable 10 forming a catheter according to the invention.
  • the electrical signal cable 10 is connected at one end to a termination board 20 and at the other end to connectors 30a and 30b.
  • the termination of the electrical signal cable 10 to the termination board 20 and to the connectors 30a and 30b is merely illustrative of possible terminations of the electrical signal cable of the invention and is not intended to be limiting of the invention.
  • the electrical signal cable comprises an electrical signal bundle 40 having a first end 45a and a second end 45b and an outer jacket 50.
  • the outer jacket has a outer jacket ends 55a and 55b.
  • the electrical signal bundle 40 extends beyond the outer jacket ends 55a, 55b.
  • Fig. 2 shows one example of the termination board 20 to which the electrical signal cable 10 at the second end 45b may be connected.
  • the termination board 20 has a plurality of contacts 60a and 60b to which each of the electrical signal conductors within the electrical signal cable 10 is connected.
  • the electrical signal conductors will be depicted in later figures.
  • the termination board 20 may be connected to probes 65 used in a medical application. Other applications are contemplated and the use is in a medical device is not limiting of the invention.
  • the contacts 60a and 60b have a pitch distance a which is preferably matched to the pitch distance of the electrical signal conductors within the electrical signal cable 10.
  • Fig. 3 shows the electrical signal cable 10 of the invention. It depicts the electrical signal bundle 40 within the outer jacket 50.
  • the electrical signal bundle 40 is manufactured - as will be described later - as a planar insulation 80 within which are encased a plurality of coplanar electrical signal conductors 70 having a pitch distance from each other.
  • the planar insulation 80 has a top side 84 and a bottom side 86.
  • a shielding strip 90 is then attached to one of the top side 84 or the bottom side 86 of the planar insulation 80.
  • the electrical signal bundle 40 is then helically wound around a central axis 60 and placed within the outer jacket 50.
  • Fig. 3 shows the electrical signal cable 10 of the invention. It depicts the electrical signal bundle 40 within the outer jacket 50.
  • the electrical signal bundle 40 is manufactured - as will be described later - as a planar insulation 80 within which are encased a plurality of coplanar electrical signal conductors 70 having a pitch distance from each other.
  • the shielding strip 90 is placed on the top side 84 of the planar insulation and thus forms an external circumference of the helically wound electrical signal bundle 40. It could also be placed on the bottom side 86 of the planar insulation 80 to form an internal circumference of the helically wound electrical signal bundle 40 as is depicted in Fig. 4.
  • the outer jacket 50 furthermore contains a drain wire 100.
  • the electrical signal conductors 70 can be made from any conducting material such as copper, nickel-plated copper, tin-plated copper, silver-plated copper, tin-plated alloys, silver-plated alloys or copper alloys. Preferably the electrical signal conductors 70 are made of round copper wire. It would also be possible to use flat conductors.
  • the number of electrical signal conductors 70 depicted in Figs. 3 and 4 are not intended to be limiting of the invention.
  • the axes of the electrical signal conductors 70 are separated by a first pitch distance a which is in the range of 0,1 to 1 mm.
  • the insulator 80 comprises an upper insulating layer 80a and a lower insulating layer 80b which can be made of any insulating dielectric material such as polyethylene, polyester, perfluoralkoxy, fluoroethylene-propylene, polypropylene, polymethylpentene, polytetrafluoroethylene or expanded polytetrafluorethylene.
  • expanded polytetrafluoroethylene such as that described in US-A-3 953 556, US-A-4 187 390 or US-A-4 443 657 is used.
  • the electrical signal bundle 40 is connected at its first end 45a to the connectors 30a, 30b by exposing the electrical signal conductors 70 within the electrical signal bundle by removing all or past of the insulator 80.
  • the electrical signal bundle 40 is connected at its second end 45b by unbundling or untwisting the electrical signal bundle 40 and then exposing at least some of the electrical signal conductors 70 by preferably removing one of the upper insulating layer 80a or the lower insulating layer 80b. This allows direct connection of the exposed conductors 70 to the conductors on the termination board 20.
  • the electrical signal bundle 40 has twenty-one electrical signal conductors 70. Sixteen of the electrical signal conductors 70 carry electrical measurement signals from the probes 65 attached to the termination board 20. Five of the electrical signal conductors 70 carry electrical control signals to the probes 65. The sixteen electrical signal conductors carrying measurement signals need to be shielded from electromagnetic fields outside the electrical signal cable 10 and from electromagnetic fields generated from the electrical control signals.
  • the electrical signal conductors 70 carrying the measurement are situated on the outer circumference of the electrical signal bundle 40 so that the shielding strip 90 shields them from stray electromagnetic fields.
  • the electrical signal conductors 70 carrying the electrical measurement signals are situated in the inner of the electrical signal bundle 40 where the shielding strip 90 shields them from stray electromagnetic fields from outside the signal bundle 40 and those generated by the electrical control signals.
  • the outer jacket 50 is made from silicone or polyolefins such as polyethylene, polypropylene or polyethylpentene; fluorinated polymers such as fluorinated ethylene/propylene (FEP); fluorinated alkoxypolymer such as perfluoro(alkoxy)alkylanes, e.g. a co-polymer of TFE and perfluorproplyvinyl ether (PFA); polyurethane, polyvinylchloride (PVC) or polytetrafluoroethylene (PTFE) or reinforced expanded PTFE (ePTFE).
  • the outer jacket 50 was made from polyethylene or expanded PTFE reinforced with silicone. The latter outer jacket 50 is available from W.L.Gore & Associates in Phoenix, Arizona, under the trade name SILKORE.
  • Fig. 5 Manufacture of the electrical signal bundle 40 is illustrated in Fig. 5 for the embodiment in which the upper insulating layer 80a and the lower insulating layer 80b are made from expanded PTFE.
  • This method is essentially the same as that taught in US-A-3082292 (Gore).
  • the same reference numerals are used to denote the components of the electrical signal bundle 40 in this figure as those used for the components of the electrical signal bundle 40 in the embodiments of the invention depicted in Figs. 3 and 4.
  • a plurality of individual signal conductors 70, an upper insulator 80a located above the plurality of individual signal conductors 70, and a lower insulator 80b located below the plurality of individual signal conductors 70 as well as a shielding strip 90 were communally passed between two contrarotating pressure rollers 110a and 110b at a lamination temperature sufficient to achieve bonding between the lower insulator 80b and the upper insulator 80a, e.g. between 327°C and 410 °C.
  • the shielding strip 90 is placed on the top side 84 of the insulator 80.
  • the same apparatus could be used to place the shielding strip 90 on the bottom side 86 of the insulator 80.
  • the upper pressure roller 110a is provided with a number of upper peripheral grooves 120a each separated by an upper peripheral rib 130a which are lined up at a distance from one another along the circumference of the pressure rollers 110a.
  • the lower pressure rollers 110b is provided with a number of lower peripheral grooves 120b each separated by a lower peripheral rib 130b which are lined up at a distance from one another along the circumference of the pressure roller 110b.
  • Each upper peripheral groove 120a of the upper pressure roller 110a together with the adjacent upper peripheral ribs 130a lines up with one of the lower peripheral grooves 120b with the adjacent lower peripheral ribs 130b of the lower pressure roller 110b to form a passageway channel for one of the electrical signal conductors 70.
  • the distance between the two pressure rollers 110a, 110b and the peripheral grooves 120a, 120b redesigned in terms of their dimensions in such a way that a single conductor 70 and the upper insulator 80a and the lower insulator 80b pass continuously between a pair consisting of one of the upper peripheral grooves 120a and one of the lower peripheral grooves 120b.
  • the upper peripheral ribs 130a and the lower peripheral ribs 130b have such a small separation from one other that the upper insulator 80a and the lower insulator 80b are firmly pressed together at these positions to form an intermediate zone 140 in the electrical signal bundle 40.
  • the electrical signal bundle 40 was led through a sintering device in which the electrical signal bundle 40 is heated such that one achieves intimate joining in the intermediate zones 140 of the electrical signal bundle 40. If using an upper insulator 80a and a lower insulator 80b made of PTFE, use is made of a sintering temperature in the range from 327° to 410°C.
  • FIG. 6 An example of an embodiment of a sintering device in the form of a sintering oven 150 comprising a salt bath is illustrated in a schematic and simplified form in Figure 6.
  • electrical signal bundle 40 is continually passed through the sintering oven 150.
  • Table 1 shows the pitch distance a for an electrical signal bundle 40 having a characteristic impedance of 50 ⁇ compared with electrical signal conductors 70 of AWG (American Wire Gauge) 3801 (outer diameter 0.102 mm), 4001 (outer diameter 0.079 mm), 4201 (outer diameter 0.063 mm) and 4401 (outer diameter 0.051) and insulators made of ePTFE (dielectric constant 1.3), PTFE (dielectric constant 2.1), PES (dielectric constant 3.3).
  • the electrical signal conductors are made of a single strand of copper wire.
  • the shielding strip 90 is formed from a perforated silver-plated copper foil.
  • Table 2 shows the same material used to obtain an electrical signal bundle 40 having a characteristic impedance of 75 ⁇ .
  • Pitch distance in mm AWG 3801 4001 4201 4401
  • Table 3 shows the use of different insulators 80 to obtain pitch distance a of specified values.
  • Pitch Distance a (mm) Insulator AWG Impedance ( ⁇ ) 0.1 ePTFE 4401 52 0.175 ePTFE 4001 51 0.35 ePTFE 3801 70 0.5 PTFE 3801 69 0.635 PES 4001 71
  • a further example of an electrical signal cable of was constructed using electrical signal conductors 70 made of AWG 4207 copper wire spaced at a pitch distance of 0.35 mm within an ePTFE insulation 80 having a dielectric constant of 1.3.
  • a shielding strip 90 was made from copper-coated polyamide foil obtainable from the Statex company of Bremen, Germany.
  • the characteristic impedance of the electrical signal cable 10 was 50 ⁇ . Flexlife measurements gave a result of around 30 000 cycles.
  • the crosstalk between the first one of the electrical signal conductors 70 and the planar insulation was measured to be 19 dB/2.5m Assembly length at 10 MHz and 22.6 dB/2.5 m assembly length at 5 MHz.
  • the impedance of the first one of the electrical signal conductors 70 was measured to be 85 ⁇ .
  • the attenuation was measured to be 2.25 dB at 10 MHz and 1.88 dB at 5 MHz.
EP98109838A 1998-05-29 1998-05-29 Faisceau de fils de signaux électriques Expired - Lifetime EP0961298B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP98109838A EP0961298B1 (fr) 1998-05-29 1998-05-29 Faisceau de fils de signaux électriques
AT98109838T ATE205958T1 (de) 1998-05-29 1998-05-29 Drahtbündel für elektrische signale
DE69801741T DE69801741T2 (de) 1998-05-29 1998-05-29 Drahtbündel für elektrische Signale
DK98109838T DK0961298T3 (da) 1998-05-29 1998-05-29 Elektrisk signalbundt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98109838A EP0961298B1 (fr) 1998-05-29 1998-05-29 Faisceau de fils de signaux électriques

Publications (2)

Publication Number Publication Date
EP0961298A1 true EP0961298A1 (fr) 1999-12-01
EP0961298B1 EP0961298B1 (fr) 2001-09-19

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EP98109838A Expired - Lifetime EP0961298B1 (fr) 1998-05-29 1998-05-29 Faisceau de fils de signaux électriques

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EP (1) EP0961298B1 (fr)
AT (1) ATE205958T1 (fr)
DE (1) DE69801741T2 (fr)
DK (1) DK0961298T3 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1341262A2 (fr) * 2002-02-27 2003-09-03 Vif Videotechnik für Industrie + Forschung GmbH Organ de liaison pour cable électrique multiple
WO2009153647A1 (fr) * 2008-06-19 2009-12-23 Toyota Jidosha Kabushiki Kaisha Faisceau de câbles et son procédé de production
WO2010148165A3 (fr) * 2009-06-19 2011-02-17 3M Innovative Properties Company Câble électrique blindé
US8466365B2 (en) 2010-08-31 2013-06-18 3M Innovative Properties Company Shielded electrical cable
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Families Citing this family (1)

* Cited by examiner, † Cited by third party
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DE10331710B4 (de) * 2003-07-11 2008-05-08 W. L. Gore & Associates Gmbh Bandkabel

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9005743U1 (fr) * 1990-05-21 1990-07-26 Kabelmetal Electro Gmbh, 3000 Hannover, De
EP0734030A1 (fr) * 1995-03-22 1996-09-25 NKT Cables A/S Câble plat torsadé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9005743U1 (fr) * 1990-05-21 1990-07-26 Kabelmetal Electro Gmbh, 3000 Hannover, De
EP0734030A1 (fr) * 1995-03-22 1996-09-25 NKT Cables A/S Câble plat torsadé

Cited By (64)

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EP1341262A2 (fr) * 2002-02-27 2003-09-03 Vif Videotechnik für Industrie + Forschung GmbH Organ de liaison pour cable électrique multiple
EP1341262A3 (fr) * 2002-02-27 2004-08-18 Vif Videotechnik für Industrie + Forschung GmbH Organ de liaison pour cable électrique multiple
WO2009153647A1 (fr) * 2008-06-19 2009-12-23 Toyota Jidosha Kabushiki Kaisha Faisceau de câbles et son procédé de production
JP2010003523A (ja) * 2008-06-19 2010-01-07 Toyota Motor Corp ワイヤーハーネス及びその製造方法
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Also Published As

Publication number Publication date
DE69801741T2 (de) 2002-07-04
DK0961298T3 (da) 2001-11-19
ATE205958T1 (de) 2001-10-15
DE69801741D1 (de) 2001-10-25
EP0961298B1 (fr) 2001-09-19

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