US3876964A - Flat flexible transmission cable - Google Patents

Flat flexible transmission cable Download PDF

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Publication number
US3876964A
US3876964A US390813A US39081373A US3876964A US 3876964 A US3876964 A US 3876964A US 390813 A US390813 A US 390813A US 39081373 A US39081373 A US 39081373A US 3876964 A US3876964 A US 3876964A
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US
United States
Prior art keywords
conductors
cable
ground
signal
flat flexible
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.)
Expired - Lifetime
Application number
US390813A
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English (en)
Inventor
Ammon Nazareth Balaster
Richard John O'neill
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.)
TE Connectivity Corp
Original Assignee
AMP 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 AMP Inc filed Critical AMP Inc
Priority to US390813A priority Critical patent/US3876964A/en
Priority to CA206,457A priority patent/CA1002132A/en
Priority to NL7410660A priority patent/NL7410660A/xx
Priority to GB3518774A priority patent/GB1468862A/en
Priority to ES429225A priority patent/ES429225A1/es
Priority to IT26340/74A priority patent/IT1019969B/it
Priority to AR255220A priority patent/AR200091A1/es
Priority to BR6883/74A priority patent/BR7406883D0/pt
Priority to DE2439853A priority patent/DE2439853C2/de
Priority to BE147804A priority patent/BE819067A/xx
Priority to SE7410624A priority patent/SE397148B/xx
Priority to AT684574A priority patent/AT333868B/de
Priority to FR7428835A priority patent/FR2241854B1/fr
Priority to JP49096940A priority patent/JPS5840284B2/ja
Publication of US3876964A publication Critical patent/US3876964A/en
Application granted granted Critical
Priority to AT987675A priority patent/AT341598B/de
Priority to CA254,493A priority patent/CA1006929A/en
Priority to SE7613682A priority patent/SE427883B/xx
Priority to AT380477A priority patent/AT347524B/de
Priority to HK191/79A priority patent/HK19179A/xx
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/0213—Electrical arrangements not otherwise provided for
    • H05K1/0237—High frequency adaptations
    • H05K1/025—Impedance arrangements, e.g. impedance matching, reduction of parasitic impedance
    • H05K1/0253—Impedance adaptations of transmission lines by special lay-out of power planes, e.g. providing openings
    • 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
    • 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
    • H01B7/0846—Parallel wires, fixed upon a support layer
    • 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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/03—Use of materials for the substrate
    • H05K1/0393—Flexible materials
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09218—Conductive traces
    • H05K2201/09236—Parallel layout
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09218—Conductive traces
    • H05K2201/09263—Meander
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09—Shape and layout
    • H05K2201/09209—Shape and layout details of conductors
    • H05K2201/09654—Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09727—Varying width along a single conductor; Conductors or pads having different widths

Definitions

  • ABSTRACT Improved flat flexible cable having at least one shielded transmission line.
  • the subject cable is formed with either a single or a plurality of signal conductors on one side of a flat flexible insulator substrate and one or a plurality of ground conductors on the opposite side of the substrate, the ground conductors preferably being interconnected.
  • Pads are formed at periodically spaced intervals along each of the signal and ground conductors so that the cable can be produced with infinite length and cut to finite lengths at the pads nearest the desired length while maintaining constant electrical transmission properties- (such as characteristic impedance, cross-talk, attenuation, etc.) throughout the length of the line and including the termination area.
  • the present invention relates to an improvement in shielded flat flexible cable and in particular to cable which can be produced in infinite length and cut for termination at lengths approximating the desired length without degrading the electrical transmission characteristics of the lines.
  • the cable includes a plurality of signal conductors 21 and two shielding conductors 22 formed on one side of a flexible plastic base material 23.
  • the cable thus produced is sliced into thirds, stacked and laminated with an insulating cover layer 24 to form a single cable.
  • Such a teaching has many obvious disadvantages amongst which are the additional manufacturing steps required for the slicing and laminating operations as well as possible alignment problems. Further, this teaching does not solve the problem of providing appropriate termination means so that long lengths of cable can be produced and subsequently cut to discrete lengths. Also, this teaching does not disclose how to control the characteristic impedance of the cable thus produced.
  • the subject shielded flat flaxible cable includes a flexible substrate having at least one signal transmission conductor formed on one side thereof and at least one shielding or grounding conductor formed on the opposite side of the substrate. Both the signal and ground conductors are provided with a plurality of periodically spaced termination pads each adapted to receive crimp connector means and which maintain integrity of the electrical transmission properties of the cable. When additional shielding is desired for high density wiring applications, the subject cable is folded upon itself so that the ground conductors substantially enclose the signal transmission conductor. When a plurality of ground conductors are used, it is preferable to have these ground conductors interconnected to provide a common ground having a plurality of alternate paths.
  • cross-talk both cable-to-cable and line-to-line
  • attenuation capacitance, propagation time, etc.
  • adequate electrical shielding characteristics for use in high density wiring applications where signal rise times are in the nano-second region.
  • the periodic termination pads additionally provide greater effective skin conductor areas to reduce attenuation effects over the parallel conductor designs of similar dimensions.
  • FIG. 1 is a plan view of a first embodiment of the subject flat flexible transmission cable before being folded to form a shielded line;
  • FIG. 2 is a plan view of the first embodiment of FIG. 1 showing the subject cable in the finished folded condition
  • FIG. 3 is a vertical transverse section through the subject cable taken along line 3-3 of FIG. 2;
  • FIG. 4 is a plan view of a second embodiment of the subject invention showing multiple signal lines and multiple ground lines;
  • FIG. 5 is a plan view of a third embodiment of the present invention.
  • FIG. 6 is a perspective view of a fourth embodiment of the present invention.
  • FIG. 7 is a transverse vertical section taken along line 7-7 in FIG. 6 and showing the fourth embodiment cable after being folded;
  • FIG. 8 is a transverse vertical section, similar to FIG. 7, schematically illustrating a fifth embodiment with interconnection of the top and bottom ground conductors through the odd numbered signal conductors to form a series of completely shielded transmission lines.
  • the first embodiment of the subject flat flexible transmission cable is intended for use in high density wiring situations where it is desirable to provide controlled characteristic impedance with adequate electrical shielding and having signal rise times in the nanosecond region.
  • a flat flexible dielec tric substrate 10 has a signal conductor 12 formed on one side and a ground conductor 14 formed on the opposite side. Both the signal and ground conductors can be formed by any of the well known printing and etching techniques.
  • the cable is formed with the signal conductor laterally offset from the longitudinal axis of the cable and the ground conductor is formed with a regularly meandering pattern, in this instance a zig-zag configuration.
  • the pattern of the ground conductor is such that it covers substantially the entire width of the cable.
  • the cable is cut transversely at points 16, near the terminal pads 18 and 20 of the signal and ground conductors, respectively, and the portion of the cable between the cuts is folded upon itself, as shown in FIGS. 2 and 3.
  • the folded cable is fixed in the folded condition by any appropriate means, such as by known adhesives.
  • Terminal connector 22 and 24 are attached to the signal and ground conductor pads 18 and 20, respectively, either from opposite directions, as shown in FIG. 2, or from the same side of the transmission cable. Examples of suitable crimped on terminal connectors may be found in US. Pat. Nos. 3,395,381; 3,553,836; 3,663,922; and 3,697,925.
  • the characteristic impedance of the folded transmission line is determined by the wave length or the pitch of the ground line as well as the thickness and dielectric properties of the substrate. This foldover concept can also be utilized with a plurality of conductors, as will be discussed with reference to the fourth and fifth embodiments, since the problem of critical alignment of parallel shields is obviated.
  • the flexible dielectric substrate 26 has a plurality of substantially parallel signal transmission conductors 28 formed on one side thereof with each of the signal conductors having formed thereon a plurality of periodically spaced pads 30 which are suitable for terminations purposes.
  • a plurality of substantially parallel ground conductors 32 are formed on the opposite side of the substrate 26 with pads 34 formed therealong in spaced relationship. It should be noted that the number of ground conductors exceeds the number of transmission conductors by one so that the transversely outermost conductor always is a ground conductor.
  • At least one conductor 36 interconnects all of the ground conductors 32, preferably at each pad 34.
  • the flexible substrate may be of any well known dielectric material, such as Mylar, and the circuits may be formed thereon by any of the well known printing and etching techniques.
  • the pattern of the signal and transmission conductors of this embodiment is formed by a plurality of interlocking ground and signal pads.
  • the pads are alternated from between the top and bottom layers so that an insulation displacement crimp can be affected on any pad without disturbing the opposite conductor layer. Termination of each conductor is possible at spaced intervals along the cable with ground pads 38 making it possible for conventional (not matched impedance) connectors to be fixed to the cable in line. Individual ground connections can be made with ground pads 34 for matched impedance connector schemes.
  • the rectangular pads of the strip line conductors also provide a small series inductance at each interval which acts to increase the normal characteristic impedance without increasing the slot width between signal and ground conductors.
  • the electrical characteristics of this design are comparable to known parallel conductor cables.
  • the impedance is controlled by adjusting the signal and ground pad and conductor proximity.
  • the disclosed cable can be terminated using any of the well known flat flexible cable connectors, such as those crimp connectors mentioned in the above listed patents as well as soldered on connectors.
  • the third embodiment of the present invention is shown in FIG. 5.
  • the flexible dielectric substrate 40 has a signal conductor 42 formed on one side with a plurality of termination pads 44 periodically spaced therealong.
  • the opposite side of the substrate has a ground line formed thereon which includes a pair of parallel spaced conductors 46 provided with periodically spaced, terminal pads 48 and 50, respectively, and interconnected by a plurality of parallel spaced conductors 52.
  • the signal and ground conductors can be formed on the substrate by any of the well known and previously discussed techniques.
  • This embodiment of the subject cable has controlled electrical transmission properties throughout its length including the termination areas.
  • This embodiment is also suitable for matched impedance connectors and can be made in either a folded configuration, similar to the first embodiment, or multi-line configuration, similar to the second embodiment.
  • the fourth embodiment differs from the previous embodiments in that the flexible insulator substrate 54 has a plurality of parallel spaced signal conductors 56 formed on one side and two separate ground conductors 58 and 60 formed on the opposite side.
  • the signal conductors are transversely offset with respect to the cable but aligned with one of the ground conductors, the ground conductors being symmetrical with respect to the cable.
  • the cable is folded and secured in the folded condition in the same manner as the first embodiment discussed above.
  • the ground conductors in this embodiment can be interconnected by terminal connectors (not shown).
  • the fifth embodiment has a folded flexible insulator substrate 62 having a plurality of signal conductors 64 and two ground conductors 66 and 68. Every other signal conductor is connected to both ground conductors by means 70 to form a series of transmission lines similar, in many respects, to coaxial cable.
  • the connection of the conductors may be effected by anyone of a number of known means including spot bonding, stapling, stitching with metallic wire, etc.
  • ground conductors 58 and 60 have been shown in FIG. 6 with a sawtooth pattern that would have the ground conductors in phase in the folded condition of the cable. It should be understood that other patterns, both in and out of phase with one another, are also suitable for use in the subject cable.
  • the primary requirement of the ground line pattern is that it must extend past the outer most edges of the transmission lines.
  • Part of the characteristic impedance of the subject cable is directly related to the thickness of the dielectric material between the signal and ground conductors. To enable high impedance within the design limit is thus a major development concern particularly for the folded embodiments.
  • Increases slot width in the ground plane also increases the cable to cable crosstalk.
  • Reduced signal conductor width and thickness serves to increase the impedance while reduction of the thickness dimension will increase the high frequency attenuation. Any discontinuities in the signal or ground patterns for purposes of termination result in altered electrical characteristics which generally degrade cable performance.
  • the design requirements for the subject cable dictate geometric patterns for the signal and ground conductor which provide high characteristics impedance with minimum thickness of the dielectric material between the signal and ground conductor layers. Cross-talk and high frequency attenuation must also be kept to within acceptable limits.
  • the pattern shown in the accompanying drawings are designed to introduce series inductance within the lines as a possible means of increasing the typical characteristic impedance.
  • the periodic rectangular pads in each line act as small series inductances.
  • impedance is increased by adding inductive reactance rather than the usual method of decreasing the capacitance.
  • This technique maintains the cross-talk values at approximately the same level while achieving higher characteristic impedances.
  • the design also provides for reduced high frequency attenuation of the signal line by increasing the overall effective surface area of the conductors.
  • the pads can also serve as termination areas providing for the previously discussed continuous termination feature.
  • the folded configuration introduces a problem of electrical connection of the upper and lower ground shields.
  • One method of interconnecting incorporates a fold over of the ground layer as illustrated in the first embodiment.
  • the folded approach introduces problems of alignment of the signal and ground patterns on conventional parallel line (slot) cables.
  • the zig-zag, general cross bar or transverse mesh patterns alleviate this problem of pattern alignment and provides for better cable to cable crosstalk characteristics than the standard slot design.
  • the characteristic impedance of the line is controlled by adjustment of the ground pattern pitch. The characteristic impedance parameter can thus be determined within the ground pattern alone so that the alignment between the ground and signal pattern is no longer of critical importance.
  • this approach provides a greater portion of the shielding directly over and under the signal conductors where it is most needed rather than to the sides of the signal conductors where radiation is relatively small.
  • An improved flexible flat cable with at least one shielded transmission line comprising:
  • At least one signal conductor formed on one side of said substrate, said at least one signal conductor being transversely offset with respect to the longitudinal axis of said cable;
  • At least one ground conductor formed on the opposite side of said substrate, said at least one ground conductor having a regular meandering configuration covering substantially the entire width of said cable;
  • each of said signal and said ground conductors having a plurality of termination pads regularly spaced along the length thereof whereby said cable may be produced in great length, cut to discrete lengths and terminated by attachment of appropriate connectors to the end most pads while maintaining continuous electrical characteristics throughout the length of the cable,
  • said cable being folded upon itself between the end most termination pads whereby said at least one signal conductor is shielded on at least two sides by electrically connected ground lines.
  • said at least one ground conductor includes a pair of conductors each following the same regular meandering pattern but being out of phase with respect to each other.
  • said at least one ground conductor comprises a pair of spaced ground conductors, further comprising a plurality of conductors interconnecting said spaced conductors.
  • An improved flexible flat cable with at least one shielded transmission line comprising:
  • each of said signal and said ground conductors havin g a plurality of termination pads regularly spaced along the length thereof whereby said cable may be produced in great length, cut .to discrete lengths and terminated by attachment of appropriate connectors to the end most pads while maintaining continuous electrical characteristics throughout the length of the cable.
  • a flat flexible cable according to claim 6 further comprising:
  • conductor means interconnecting each of said plurality of ground conductors.
  • a flat flexible cable according to claim 9 further comprising a plurality of additiona termination pads formed on each of the laterally exterior ground donductors, said additional termination pads being transversely aligned with but spaced outwardly of the responsive rows of transversely aligned termination pads of said signal conductors.
  • a flat flexible cable according to claim 10 wherein connectors are attached to the end most aligned row of signal conductor termination pads and additional termination pads of said ground lines thereby providing an unmatched impedance connection for said cable.
  • a flat flexible cable having at least one transmission line comprising:
  • each signal conductor having a plurality of enlarged termination pads formed therealong at regularly spaced intervals, the respective termination pads of each signal conductor being in substantial transverse alignment across said cable,
  • each ground conductor having a plurality of enlarged termination pads formed therealong at regularly spaced intervals, the respective termination pads of each ground conductor being positioned in substantial transverse alignment across said cable and longitudinally between the termination pads of said signal conductors whereby constant specific characteristic impedance throughout the length of the cable is achieved.
  • a flat flexible transmission cable according to claim 12 further comprising a plurality of conductors interconnecting each of said plurality of ground conductors.
  • a flat flexible transmission cable according to claim 12 further comprising an additional termination pad formed on each of the transversely exterior ground conductors, said additional termination pads being in longitudinal alignment with but transversely spaced outwardly from respective rows of termination pads of said signal conductors thereby providing unmatched impedance termination for said cable.
  • each said signal conductor being shielded by ground conductors on at least two sides.
  • a flat flexible cable according to claim 16 further comprising a plurality of conductors interconnecting each of said ground conductors.
  • a flat flexible cable according to claim 16 further comprising a plurality of conductor means interconnecting said ground conductors and the odd numbered signal conductors through said substrate whereby said flat flexible cable simulates a plurality of coaxial cables.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insulated Conductors (AREA)
US390813A 1973-08-23 1973-08-23 Flat flexible transmission cable Expired - Lifetime US3876964A (en)

Priority Applications (19)

Application Number Priority Date Filing Date Title
US390813A US3876964A (en) 1973-08-23 1973-08-23 Flat flexible transmission cable
CA206,457A CA1002132A (en) 1973-08-23 1974-08-07 Flat flexible cable
NL7410660A NL7410660A (nl) 1973-08-23 1974-08-08 Platte buigzame kabel.
GB3518774A GB1468862A (en) 1973-08-23 1974-08-09 Flexible cable
ES429225A ES429225A1 (es) 1973-08-23 1974-08-13 Perfeccionamientos introducidos en un cable flexible para una linea de transmision.
IT26340/74A IT1019969B (it) 1973-08-23 1974-08-14 Cavo flessibile piatto
AR255220A AR200091A1 (es) 1973-08-23 1974-08-16 Cable flexible plano para una linea de transmision
DE2439853A DE2439853C2 (de) 1973-08-23 1974-08-20 Elektrisches Flachbandkabel
BR6883/74A BR7406883D0 (pt) 1973-08-23 1974-08-20 Cabo flexivel chato
SE7410624A SE397148B (sv) 1973-08-23 1974-08-21 Elektrisk overforings- eller transmissionskabel
BE147804A BE819067A (fr) 1973-08-23 1974-08-21 Cable flexible plat de ligne de transmission
AT684574A AT333868B (de) 1973-08-23 1974-08-22 Elektrisches flachkabel
FR7428835A FR2241854B1 (de) 1973-08-23 1974-08-22
JP49096940A JPS5840284B2 (ja) 1973-08-23 1974-08-23 送信ケ−ブル
AT987675A AT341598B (de) 1973-08-23 1975-12-29 Elektrisches ubertragungskabel
CA254,493A CA1006929A (en) 1973-08-23 1976-06-10 Flat flexible cable
SE7613682A SE427883B (sv) 1973-08-23 1976-12-06 Elektrisk overforings- eller transmissionskabel
AT380477A AT347524B (de) 1973-08-23 1977-05-27 Elektrisches uebertragungskabel
HK191/79A HK19179A (en) 1973-08-23 1979-03-29 Flexible cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US390813A US3876964A (en) 1973-08-23 1973-08-23 Flat flexible transmission cable

Publications (1)

Publication Number Publication Date
US3876964A true US3876964A (en) 1975-04-08

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Application Number Title Priority Date Filing Date
US390813A Expired - Lifetime US3876964A (en) 1973-08-23 1973-08-23 Flat flexible transmission cable

Country Status (15)

Country Link
US (1) US3876964A (de)
JP (1) JPS5840284B2 (de)
AR (1) AR200091A1 (de)
AT (1) AT333868B (de)
BE (1) BE819067A (de)
BR (1) BR7406883D0 (de)
CA (1) CA1002132A (de)
DE (1) DE2439853C2 (de)
ES (1) ES429225A1 (de)
FR (1) FR2241854B1 (de)
GB (1) GB1468862A (de)
HK (1) HK19179A (de)
IT (1) IT1019969B (de)
NL (1) NL7410660A (de)
SE (2) SE397148B (de)

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US4130723A (en) * 1976-11-19 1978-12-19 The Solartron Electronic Group Limited Printed circuit with laterally displaced ground and signal conductor tracks
US4596141A (en) * 1984-02-29 1986-06-24 Kabushiki Kaisha Tsuchiya Seisakusho Electrically operated oil level gauge
US4680557A (en) * 1985-04-22 1987-07-14 Tektronix, Inc. Staggered ground-plane microstrip transmission line
US4785135A (en) * 1987-07-13 1988-11-15 International Business Machines Corporation De-coupled printed circuits
US5134252A (en) * 1990-01-21 1992-07-28 Sony Corporation Signal line
US5238006A (en) * 1991-06-24 1993-08-24 Medtronic, Inc. Apnea stimulation lead
US5262590A (en) * 1992-04-27 1993-11-16 Sheldahl, Inc. Impedance controlled flexible circuits with fold-over shields
US5398689A (en) * 1993-06-16 1995-03-21 Hewlett-Packard Company Ultrasonic probe assembly and cable therefor
US5408050A (en) * 1992-04-16 1995-04-18 Honda Tsushin Kogyo Co., Ltd. Flat cable and method of making the same
US5552565A (en) * 1995-03-31 1996-09-03 Hewlett-Packard Company Multiconductor shielded transducer cable
US5554825A (en) * 1994-11-14 1996-09-10 The Whitaker Corporation Flexible cable with a shield and a ground conductor
US5556300A (en) * 1994-11-14 1996-09-17 The Whitaker Corporation End connection for a flexible shielded cable conductor
US5571164A (en) * 1994-09-29 1996-11-05 Pacesetter Ab Cardiac electrode device having at least a portion thereof which is ribbon shaped
US5594214A (en) * 1995-01-20 1997-01-14 Acer Peripherals, Inc. Signal transmission flat cable
US5811727A (en) * 1995-10-16 1998-09-22 Lo; Jeffrey In-line coupler
US5917149A (en) * 1997-05-15 1999-06-29 Daimlerchrysler Corporation Flexible circuit board interconnect with strain relief
US5924873A (en) * 1997-05-15 1999-07-20 Chrysler Corporation Flexible circuit board interconnect with strain relief
US5981870A (en) * 1997-05-15 1999-11-09 Chrysler Corporation Flexible circuit board interconnect with strain relief
US6132236A (en) * 1999-05-14 2000-10-17 Methode Electronics, Inc. Flex cable termination apparatus and termination method
US6218631B1 (en) * 1998-05-13 2001-04-17 International Business Machines Corporation Structure for reducing cross-talk in VLSI circuits and method of making same using filled channels to minimize cross-talk
US20050083152A1 (en) * 2003-10-17 2005-04-21 Jimmy Hsu Signal transmission structure
US20060208355A1 (en) * 2005-03-21 2006-09-21 Mahadevan Suryakumar Routing configuration for high frequency signals in an integrated circuit package
US20060254814A1 (en) * 2003-07-21 2006-11-16 Bouryi Sze Ground shield structure
US20070099483A1 (en) * 2005-10-28 2007-05-03 Chicony Electronics Co. Ltd Flexible circuit board
US20070257502A1 (en) * 2004-07-02 2007-11-08 Takashi Imai Interior Material Structure for Vehicle
US20090236126A1 (en) * 2006-08-29 2009-09-24 Seiichiro Miyahara Flexible Wiring Board
US20100188826A1 (en) * 2008-03-10 2010-07-29 Shih-Kun Yeh Connector device
US8844537B1 (en) 2010-10-13 2014-09-30 Michael T. Abramson System and method for alleviating sleep apnea
US20150213924A1 (en) * 2014-01-28 2015-07-30 Wei Sun Chang Flexible flat cable
US20170280554A1 (en) * 2015-08-06 2017-09-28 Nippon Mektron, Ltd. Multilayer flexible printed circuit board and method of manufacturing the same
WO2018022687A1 (en) * 2016-07-28 2018-02-01 Qualcomm Incorporated Circuits and methods providing electronic band gap (ebg) structures at memory module electrical coupling
US10930410B1 (en) * 2019-11-12 2021-02-23 Dell Products L.P. Flat flexible cable with bonded ground wires and method for forming same
WO2021133028A1 (en) 2019-12-24 2021-07-01 Samsung Electronics Co., Ltd. Circuit board and electronic device including circuit board

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GB1534014A (en) * 1975-10-16 1978-11-29 Xerox Corp Electrical cable and coupling arrangement
FR2530874A1 (fr) * 1982-07-20 1984-01-27 Jaeger Dispositif de connexion electrique souple antiparasite
GB2166603B (en) * 1984-09-28 1988-07-20 Yazaki Corp Electrical harness
US4644092A (en) * 1985-07-18 1987-02-17 Amp Incorporated Shielded flexible cable
FR2613539A1 (fr) * 1987-04-03 1988-10-07 Bull Sa Connecteur de bus adapte en impedance et procede de fabrication d'un tel connecteur
US20040094324A1 (en) * 2002-11-18 2004-05-20 Barr Andrew Harvey Cable systems and related methods
CN108492930B (zh) * 2018-03-15 2023-08-25 上海电气集团腾恩驰科技(苏州)有限公司 一种转向导轮组
CN110475423A (zh) * 2019-08-22 2019-11-19 星河电路（福建）有限公司 一种局部高频与fr-4镶嵌的结构及加工方法

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US4130723A (en) * 1976-11-19 1978-12-19 The Solartron Electronic Group Limited Printed circuit with laterally displaced ground and signal conductor tracks
US4596141A (en) * 1984-02-29 1986-06-24 Kabushiki Kaisha Tsuchiya Seisakusho Electrically operated oil level gauge
US4680557A (en) * 1985-04-22 1987-07-14 Tektronix, Inc. Staggered ground-plane microstrip transmission line
US4785135A (en) * 1987-07-13 1988-11-15 International Business Machines Corporation De-coupled printed circuits
US5134252A (en) * 1990-01-21 1992-07-28 Sony Corporation Signal line
US5238006A (en) * 1991-06-24 1993-08-24 Medtronic, Inc. Apnea stimulation lead
US5408050A (en) * 1992-04-16 1995-04-18 Honda Tsushin Kogyo Co., Ltd. Flat cable and method of making the same
US5262590A (en) * 1992-04-27 1993-11-16 Sheldahl, Inc. Impedance controlled flexible circuits with fold-over shields
US5398689A (en) * 1993-06-16 1995-03-21 Hewlett-Packard Company Ultrasonic probe assembly and cable therefor
US5571164A (en) * 1994-09-29 1996-11-05 Pacesetter Ab Cardiac electrode device having at least a portion thereof which is ribbon shaped
US5554825A (en) * 1994-11-14 1996-09-10 The Whitaker Corporation Flexible cable with a shield and a ground conductor
US5556300A (en) * 1994-11-14 1996-09-17 The Whitaker Corporation End connection for a flexible shielded cable conductor
US5594214A (en) * 1995-01-20 1997-01-14 Acer Peripherals, Inc. Signal transmission flat cable
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US5811727A (en) * 1995-10-16 1998-09-22 Lo; Jeffrey In-line coupler
US5917149A (en) * 1997-05-15 1999-06-29 Daimlerchrysler Corporation Flexible circuit board interconnect with strain relief
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US20050083152A1 (en) * 2003-10-17 2005-04-21 Jimmy Hsu Signal transmission structure
US7106145B2 (en) * 2003-10-17 2006-09-12 Via Technologies, Inc. Signal transmission structure having salients aligned with non-reference regions
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US7569947B2 (en) * 2004-07-02 2009-08-04 Toyota Jidosha Kabushiki Kaisha Interior material structure for vehicle
US7586192B2 (en) * 2005-03-21 2009-09-08 Intel Corporation Routing configuration for high frequency signals in an integrated circuit package
US20060208355A1 (en) * 2005-03-21 2006-09-21 Mahadevan Suryakumar Routing configuration for high frequency signals in an integrated circuit package
US20070099483A1 (en) * 2005-10-28 2007-05-03 Chicony Electronics Co. Ltd Flexible circuit board
US7291037B2 (en) * 2005-10-28 2007-11-06 Chicony Electronics Co. Ltd Flexible circuit board
US8242373B2 (en) * 2006-08-29 2012-08-14 Nippon Mektron, Ltd. Flexible wiring board with characteristic impedance control circuit
US20090236126A1 (en) * 2006-08-29 2009-09-24 Seiichiro Miyahara Flexible Wiring Board
US20100188826A1 (en) * 2008-03-10 2010-07-29 Shih-Kun Yeh Connector device
US8844537B1 (en) 2010-10-13 2014-09-30 Michael T. Abramson System and method for alleviating sleep apnea
US9763767B2 (en) 2010-10-13 2017-09-19 Michael T. Abramson System and method for alleviating sleep apnea
US20150213924A1 (en) * 2014-01-28 2015-07-30 Wei Sun Chang Flexible flat cable
US20170280554A1 (en) * 2015-08-06 2017-09-28 Nippon Mektron, Ltd. Multilayer flexible printed circuit board and method of manufacturing the same
US9883584B2 (en) * 2015-08-06 2018-01-30 Nippon Mektron, Ltd. Method of manufacturing a multilayer flexible printed circuit board
WO2018022687A1 (en) * 2016-07-28 2018-02-01 Qualcomm Incorporated Circuits and methods providing electronic band gap (ebg) structures at memory module electrical coupling
US10349513B2 (en) 2016-07-28 2019-07-09 Qualcomm Incorporated Circuits and methods providing electronic band gap (EBG) structures at memory module electrical coupling
US10930410B1 (en) * 2019-11-12 2021-02-23 Dell Products L.P. Flat flexible cable with bonded ground wires and method for forming same
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Also Published As

Publication number Publication date
FR2241854B1 (de) 1981-04-17
GB1468862A (en) 1977-03-30
BE819067A (fr) 1975-02-21
ES429225A1 (es) 1976-08-16
CA1002132A (en) 1976-12-21
SE427883B (sv) 1983-05-09
SE7613682L (sv) 1976-12-06
DE2439853A1 (de) 1975-03-06
SE7410624L (de) 1975-02-24
HK19179A (en) 1979-04-06
AR200091A1 (es) 1974-10-15
AT333868B (de) 1976-12-10
IT1019969B (it) 1977-11-30
DE2439853C2 (de) 1984-05-17
JPS5050680A (de) 1975-05-07
JPS5840284B2 (ja) 1983-09-05
NL7410660A (nl) 1975-02-25
SE397148B (sv) 1977-10-17
ATA684574A (de) 1976-04-15
BR7406883D0 (pt) 1975-06-17
FR2241854A1 (de) 1975-03-21

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