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US3818117A - Low attenuation flat flexible cable - Google Patents

Low attenuation flat flexible cable Download PDF

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Publication number
US3818117A
US3818117A US00353257A US35325773A US3818117A US 3818117 A US3818117 A US 3818117A US 00353257 A US00353257 A US 00353257A US 35325773 A US35325773 A US 35325773A US 3818117 A US3818117 A US 3818117A
Authority
US
United States
Prior art keywords
conductors
cable
shunt
parallel
signal
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
US00353257A
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English (en)
Inventor
E Reyner
J Bogar
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US00353257A priority Critical patent/US3818117A/en
Priority to CA196,254A priority patent/CA1000823A/en
Priority to AU67357/74A priority patent/AU478736B2/en
Priority to GB1592674A priority patent/GB1453019A/en
Priority to IT21545/74A priority patent/IT1045723B/it
Priority to ES425423A priority patent/ES425423A2/es
Priority to DE19742418780 priority patent/DE2418780C2/de
Priority to NL7405251A priority patent/NL176316C/xx
Priority to FR7413705A priority patent/FR2226731B2/fr
Priority to BE143442A priority patent/BE813984R/xx
Priority to BR3226/74A priority patent/BR7403226D0/pt
Priority to JP49045897A priority patent/JPS58642B2/ja
Priority to SE7405452A priority patent/SE386997B/sv
Priority to AR253413A priority patent/AR198749A1/es
Priority to AT334874A priority patent/AT325128B/de
Application granted granted Critical
Publication of US3818117A publication Critical patent/US3818117A/en
Priority to HK198/79A priority patent/HK19879A/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
    • H01B11/00—Communication cables or conductors
    • 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
    • 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
    • H05K1/0216—Reduction of cross-talk, noise or electromagnetic interference
    • H05K1/0218—Reduction of cross-talk, noise or electromagnetic interference by printed shielding conductors, ground planes or power plane
    • H05K1/0224—Patterned shielding planes, ground planes or power planes
    • 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
    • H05K2201/07—Electric details
    • H05K2201/0707—Shielding
    • H05K2201/0715—Shielding provided by an outer layer of PCB
    • 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
    • H05K2201/09663—Divided layout, i.e. conductors divided in two or more parts
    • 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
    • H05K2201/09681—Mesh conductors, e.g. as a ground plane

Definitions

  • ABSTRACT A flat shielded cable comprising a plurality of parallel spaced-apart signal conductors in a first plane and a shield member in the form of a conductive ground plane facing the signal conductors and being positioned in a second plane, the shield member having preselected amounts of conductive material removed in the area opposite the signal conductors to form ground lines, which are parallel to the signal conductors to control the characteristic impedance of the cable, and also to fonn parallel, conductive shunting paths between the ground lines at predetermined intervals to correct for excessive attenuation caused by' skewing of the signal conductors with respect to the ground lines.
  • Various flat multiple conductor cable configurations are known. These can be broadly classified into a first group comprising a plurality of round wires positioned in a parallel relationship to each other and embedded in a suitable dielectric and a second group comprised of flat ribbon like conductors also positioned in a parallel relationship to eachother and embedded in a dielectric material.
  • a description of one of such known cable configurations of the second group can be found in U.S. Pat. No. 3,703,604 issued Nov. 21, 1972.
  • the above-mentioned patent describes a shielded flat cable having a plurality of signal conductors in a parallel, spaced arrangement in a first plane and a conductive shield member in a second plane in confrontingrelationship with the signal conductors.
  • the shield member or ground plane as it is called, and the signal conductors are separated by a suitable dielectric.
  • portions of the ground plane facing the signal conductors are removed.
  • the deleted sections of the ground plane form thin, parallel slots running substantially the length of the signal conductors. This controlled removal of ground plane material decreases the signal conductor-to-ground plane capacitance to thereby alter the cables characteristic impedance.
  • Each signal line is staggered with respect to the near est ground lines so that there are two associated ground lines adjacent to each signal line. If a particular signal line is serpentine and at a particular point along the flexible cable it becomes relatively close to one of the associated pair of ground lines it also becomes correspondingly relatively further away from the other one of the pair of associated ground lines. Thus over a substantial length of the flexible cable the average impedance with respect to the pair of ground lines is constant.
  • skewing does produce a number of problems, one of the most serious being that since the skewing is periodic, energy is coupled into the ground plane which produces high attenuation at wavelengths corresponding to the periodicity of the skewing. In such a case the two ground lines in themselves form a two wire transmission line. It is this line into which energy is coupled due to skewing. Such energy is thereby lost from the signal line.
  • the zero reference line is the output voltage derived from the signal generator without interposing a cable section.
  • the attenuation is thus measured in dB with respect to the zero reference line.
  • the attenuation increases, i.e., the distance to the zero reference line increases sharply as indicated in the figure.
  • FIG. 3 shows a time domain reflectometry plot in which the abscissa is calibrated in time, which is directly related to the distance along the cable, and the ordinate is the reflection co-efficient.
  • time domain reflectometry sends a fast rise time step along a line or circuit and looks at the reflection as it comes back. When measuring impedance, it produces a picture or graph representing the impedance of the line as it is averaged by the highest frequencies of the step along its length. Since the horizontal axis of the graph is distance along the line, it is possible to locate and identify the impedance of the elements of the line, such as lengths of cable, connectors and other electrical components. The vertical axis can be read as impedance or as reflection coefficient (y) as marked.
  • the reflection coefficient ('y) is the ratio of the amplitude of the reflected voltage to the amplitude of the incident voltage.
  • the reflection coefficient is related to the terminating impedance (Z any point on the line by the equation:
  • Curve R represents the impedance between the associated ground lines into which energy is coupled due to skewing, as explained above.
  • Curve R results from taking the impedance between one of the ground lines and the signal line.
  • Curve R shows the TDR curve resulting when the ground line responsible for curve R is removed from the cable configuration and the effective impedance is provided by the other ground line of the pair of ground lines associated with the signal line.
  • the curves R R and R thus represent the impedance as a function of length for the same cable. An inverse variation in the effective impedance is thus produced by skewing.
  • allel shunt paths oriented in a direction substantially perpendicular to the ground lines.
  • the shunt paths are spaced apart by a predetermined distance selected to be a small'fraction of the wavelengths of the signals which are expected to be carried by the flat cable.
  • FIG. 1 is an R.F. attenuation curve of a prior art flat cable showing signal attenuation of the cable as a function of frequency;
  • FIG. 2 are RF. signal attenuation plots of a prior art cable showing attenuation due to skewing as a function of cable length;
  • FIG. 3 are time domain reflectometry plots of the impedance characteristics of a prior art flat cable
  • FIG. 4 is an RF. signal attenuation curve, similar to the curve of FIG. 2, of a cable constructed according to the invention
  • FIG. 5 is a plan view of the end of a flat cable according to one embodiment of the invention.
  • FIG. 6 is an enlarged section taken along the line 6-6 of FIG. 5;
  • FIG. 7 is a horizontal view of the underside of the flat cable and depicted in FIG. 5.
  • a flexible flat conductor cable 10 includes a plurality of parallel, spaced-apart ribbon-like signal conductors 12. Each of the conductor l2 terminates in a separate pad 11.
  • a ground plane 16, of electrically conductive material lies in a plane parallel to the plane of the spacedapart signal conductors 12.
  • the signal conductors 12 are separated from the ground plane 16 by a dielectric 13 of suitable material such as Mylar (polyethylene terephthalate).
  • Mylar polyethylene terephthalate
  • the Mylar is transparent and is best seen in the cross-section of FIG. 6.
  • Two cover sheets 14 and 15 of similar material may encase the conductors 12 and 16 and the dielectric 13.
  • the ground plane 16 contains slots 18 devoid of electrically conductive material. These narrow slots are opposite each of the signal conductors. By selectively altering the width of these slots, the capacitance between the signal conductors and the ground plane can be changed without requiring a change in the thickness of the dielectric 13 or a change in the dielectric constant of this material. Additionally the area of the ground plane 16 which is opposite the termination pads 11 is removed by etching to facilitate couplingof the cable 10 to a connector (not shown).
  • the slots 18 which are devoid of electrically conductive material are parallel to each other and are separated by thin, parallel strips of conductive material, hereinafter referred to as the ground lines 20.
  • the ground lines 20 are parallel to the signal lines 12 but substantially spaced between the signal lines 12 The orientation of the signal lines 12 and the ground lines 20 is that they run the length of the cable 10.
  • each of the shunt paths 22 is chosen such as to keep the resistance relatively low, for example, less then 0.01 ohms and also so that the capacitance of the lines are not greatly affected and the impedance made too low. For example, if L equals the center-tocenter spacing between the shunt paths 22 along the length of the cable then a preferable ratio of W/L would be less than or equal to approximately 0.1.
  • the upper frequency limit may also be determined as a function of the spacing L between the shunt paths 22.
  • the spacing is such that the distance L is equal to a half wavelength then the upper frequency may be determined as follows:
  • the spacing between the shunt paths 22 should be chosen to be a small fraction of the shortest wavelength signal to be carried by the flexible cable. Based on the above formulae, in one embodiment the preferred center-to-center spacing between the shunt paths is chosen to be substantially less than and where r v the speed of electromagnetic wave propagation in the cable and f the highest frequency of the signals expected to be transmitted by the cable.
  • the cable of the invention is also suitable for transmitting pulse signals.
  • the equivalent frequencies (in GHz) off and f for use in the above described formulae may be obtained by dividing the factor 0.35 by the rise time of the pulses (in nanoseconds), as is known to those skilled in the art.
  • FIG. 4 the RF. attenuation curve of a 50 ohm flat cable constructed according to the invention is illustrated.
  • the shunt paths were spaced 250 mils apart and the cable length was 5.5 feet.
  • a flat cable for transmitting signals comprising: a plurality of transmission lines formed by a plurality of flat parallel spaced-apart signal conductors lying in a single plane and associated corresponding pairs of a plurality of parallel flat shield conductors lying in a plane parallel to the single plane of said signal conductors, said shield conductors extending parallel to said signal conductors and being laterally offset from said signal conductors, a plurality of parallel shunt conductors interconnecting said shield conductors at spaced intervals, and insulating material between said conductors and encasing said conductors, said shunt conductors preventing signal coupling between any individual transmission line and another transmission line formed by the pair of shield conductors associated with the individual transmission line.
  • a terminated flat cable comprising: a plurality of parallel spaced-apart signal conductors lying in a single plane, a plurality of flat electrically conductive shielding means lying in a plane extending parallel to, and spaced from, said single plane, dielectric material between said signal conductors and said shielding means, a transversely extending zone adjacent to one end of said cable which is devoid of said conductive shielding means, and flat electrically conductive shunt means lying in said plane of said plurality of shielding means and interconnecting said plurality of shielding means at spaced intervals and being oriented in a direction substantially perpendicular to said parallel signal conductors.
  • a cable as recited in claim 2 wherein the spacing transmission line formed by the two shield conductors.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Insulated Conductors (AREA)
US00353257A 1970-12-17 1973-04-23 Low attenuation flat flexible cable Expired - Lifetime US3818117A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
US00353257A US3818117A (en) 1973-04-23 1973-04-23 Low attenuation flat flexible cable
CA196,254A CA1000823A (en) 1973-04-23 1974-03-28 Flat cable with apertured ground plane
AU67357/74A AU478736B2 (en) 1973-04-23 1974-03-29 Improvements in and relating to flat cable
GB1592674A GB1453019A (en) 1970-12-17 1974-04-10 Flat cable
IT21545/74A IT1045723B (it) 1973-04-23 1974-04-17 Perfezionamenti relativi a cavi piatti
ES425423A ES425423A2 (es) 1973-04-23 1974-04-17 Perfeccionamientos introducidos en cables planos que com- prenden una pluralidad de conductores de senal paralelos.
NL7405251A NL176316C (nl) 1970-12-17 1974-04-18 Platte kabel.
DE19742418780 DE2418780C2 (de) 1970-12-17 1974-04-18 Flachkabel
FR7413705A FR2226731B2 (sv) 1970-12-17 1974-04-19
BE143442A BE813984R (fr) 1970-12-17 1974-04-19 Cable plat
BR3226/74A BR7403226D0 (pt) 1973-04-23 1974-04-22 Aperfeicoamento em cabo plano
JP49045897A JPS58642B2 (ja) 1973-04-23 1974-04-23 ヒラガタケ−ブル ニ カンスル カイリヨウ
SE7405452A SE386997B (sv) 1973-04-23 1974-04-23 Plan kabel
AR253413A AR198749A1 (es) 1973-04-23 1974-04-23 Mejoras en un cable chato
AT334874A AT325128B (de) 1970-12-17 1974-04-23 Flachkabel
HK198/79A HK19879A (en) 1973-04-23 1979-03-29 Improvement in and relating to flat cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00353257A US3818117A (en) 1973-04-23 1973-04-23 Low attenuation flat flexible cable

Publications (1)

Publication Number Publication Date
US3818117A true US3818117A (en) 1974-06-18

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US00353257A Expired - Lifetime US3818117A (en) 1970-12-17 1973-04-23 Low attenuation flat flexible cable

Country Status (9)

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US (1) US3818117A (sv)
JP (1) JPS58642B2 (sv)
AR (1) AR198749A1 (sv)
BR (1) BR7403226D0 (sv)
CA (1) CA1000823A (sv)
ES (1) ES425423A2 (sv)
HK (1) HK19879A (sv)
IT (1) IT1045723B (sv)
SE (1) SE386997B (sv)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USB456346I5 (sv) * 1974-03-29 1975-01-28
US3923364A (en) * 1973-12-06 1975-12-02 Executone Inf Sys Inc Shielded flexible conductor cable and assembly thereof
US4045750A (en) * 1975-10-16 1977-08-30 Xerox Corporation Electrical cable and coupling arrangement
US4475006A (en) * 1981-03-16 1984-10-02 Minnesota Mining And Manufacturing Company Shielded ribbon cable
US4551789A (en) * 1981-12-23 1985-11-05 International Business Machines Corporation Multilayer ceramic substrates with several metallization planes
US4644092A (en) * 1985-07-18 1987-02-17 Amp Incorporated Shielded flexible cable
US4860088A (en) * 1986-10-11 1989-08-22 Microelectronics And Computer Technology Corporation Electrical interconnect tape
US4908735A (en) * 1986-10-24 1990-03-13 Kabushiki Kaisha Toshiba Electronic apparatus reducing generation of electro magnetic interference
US5036379A (en) * 1986-10-11 1991-07-30 Microelectronics And Computer Technology Corporation Electrical interconnect tape
US5398689A (en) * 1993-06-16 1995-03-21 Hewlett-Packard Company Ultrasonic probe assembly and cable therefor
US5552565A (en) * 1995-03-31 1996-09-03 Hewlett-Packard Company Multiconductor shielded transducer cable
US5811727A (en) * 1995-10-16 1998-09-22 Lo; Jeffrey In-line coupler
WO2000027172A1 (en) * 1998-10-29 2000-05-11 Trustees Of Princeton University Foldable circuits and method of making same
US20030228005A1 (en) * 2000-10-27 2003-12-11 Lightwaves Systems, Inc. High bandwidth data transport system
US20050136699A1 (en) * 2003-12-19 2005-06-23 International Business Machines Corporation Signal channel configuration providing increased capacitance at a card edge connection
US20050254554A1 (en) * 2002-04-30 2005-11-17 Lightwaves Systems, Inc. Method and apparatus for multi-band UWB communications
US20090110085A1 (en) * 2007-10-29 2009-04-30 Lightwaves Systems, Inc. High bandwidth data transport system
US20100329247A1 (en) * 2003-04-30 2010-12-30 Lightwaves Systems, Inc. High bandwidth data transport system
EP2605624A1 (en) * 2011-12-15 2013-06-19 Hosiden Corporation Flexible flat cable
EP2739125A1 (en) * 2012-11-28 2014-06-04 Tyco Electronics Svenska Holdings AB Electrical connection interface for connecting electrical leads for high speed data transmission
US20160120026A1 (en) * 2013-10-30 2016-04-28 Kyocera Corporation Circuit board, electronic component housing package, and electronic device
US20170135202A1 (en) * 2015-11-05 2017-05-11 Sae Magnetics (H.K.) Ltd. Edge fingers of multi-layer printed circuit board
US10057980B2 (en) * 2016-03-15 2018-08-21 Cisco Technology, Inc. Method and apparatus for reducing corrosion in flat flexible cables and flexible printed circuits
CN111465211A (zh) * 2020-06-02 2020-07-28 安徽方兴光电新材料科技有限公司 一种交错式bonding金属线路

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5962617U (ja) * 1982-10-20 1984-04-24 株式会社リコー 小型電子機器用プリントケ−ブル板

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US2963535A (en) * 1957-12-16 1960-12-06 Sanders Associates Inc Shielded printed circuit electrical component
US3179904A (en) * 1962-12-05 1965-04-20 Ibm Flexible multiconductor transmission line utilizing alternate conductors as crosstalk shields
US3459879A (en) * 1967-05-29 1969-08-05 Hughes Aircraft Co Flexible multiflat conductor characteristic impedance cable
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US3629787A (en) * 1970-06-19 1971-12-21 Bell Telephone Labor Inc Connector for flexible circuitry
US3700825A (en) * 1970-10-01 1972-10-24 Int Computers Ltd Circuit interconnecting cables and methods of making such cables
US3703604A (en) * 1971-11-30 1972-11-21 Amp Inc Flat conductor transmission cable

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US2963535A (en) * 1957-12-16 1960-12-06 Sanders Associates Inc Shielded printed circuit electrical component
US3179904A (en) * 1962-12-05 1965-04-20 Ibm Flexible multiconductor transmission line utilizing alternate conductors as crosstalk shields
US3459879A (en) * 1967-05-29 1969-08-05 Hughes Aircraft Co Flexible multiflat conductor characteristic impedance cable
US3612744A (en) * 1969-02-27 1971-10-12 Hughes Aircraft Co Flexible flat conductor cable of variable electrical characteristics
US3629787A (en) * 1970-06-19 1971-12-21 Bell Telephone Labor Inc Connector for flexible circuitry
US3700825A (en) * 1970-10-01 1972-10-24 Int Computers Ltd Circuit interconnecting cables and methods of making such cables
US3703604A (en) * 1971-11-30 1972-11-21 Amp Inc Flat conductor transmission cable

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Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3923364A (en) * 1973-12-06 1975-12-02 Executone Inf Sys Inc Shielded flexible conductor cable and assembly thereof
USB456346I5 (sv) * 1974-03-29 1975-01-28
US3914531A (en) * 1974-03-29 1975-10-21 Amp Inc Power isolated transmission cable assembly
US4045750A (en) * 1975-10-16 1977-08-30 Xerox Corporation Electrical cable and coupling arrangement
US4475006A (en) * 1981-03-16 1984-10-02 Minnesota Mining And Manufacturing Company Shielded ribbon cable
US4551789A (en) * 1981-12-23 1985-11-05 International Business Machines Corporation Multilayer ceramic substrates with several metallization planes
US4644092A (en) * 1985-07-18 1987-02-17 Amp Incorporated Shielded flexible cable
US4860088A (en) * 1986-10-11 1989-08-22 Microelectronics And Computer Technology Corporation Electrical interconnect tape
US5036379A (en) * 1986-10-11 1991-07-30 Microelectronics And Computer Technology Corporation Electrical interconnect tape
US4908735A (en) * 1986-10-24 1990-03-13 Kabushiki Kaisha Toshiba Electronic apparatus reducing generation of electro magnetic interference
US5398689A (en) * 1993-06-16 1995-03-21 Hewlett-Packard Company Ultrasonic probe assembly and cable therefor
US5552565A (en) * 1995-03-31 1996-09-03 Hewlett-Packard Company Multiconductor shielded transducer cable
US5811727A (en) * 1995-10-16 1998-09-22 Lo; Jeffrey In-line coupler
WO2000027172A1 (en) * 1998-10-29 2000-05-11 Trustees Of Princeton University Foldable circuits and method of making same
US20030228005A1 (en) * 2000-10-27 2003-12-11 Lightwaves Systems, Inc. High bandwidth data transport system
US7376191B2 (en) * 2000-10-27 2008-05-20 Lightwaves Systems, Inc. High bandwidth data transport system
US20080159416A1 (en) * 2000-10-27 2008-07-03 Lightwaves Systems, Inc. High bandwidth data transport system
US7826540B2 (en) 2000-10-27 2010-11-02 Lightwaves Systems, Inc. High bandwidth data transport system
US20050254554A1 (en) * 2002-04-30 2005-11-17 Lightwaves Systems, Inc. Method and apparatus for multi-band UWB communications
US8270452B2 (en) 2002-04-30 2012-09-18 Lightwaves Systems, Inc. Method and apparatus for multi-band UWB communications
US7961705B2 (en) 2003-04-30 2011-06-14 Lightwaves Systems, Inc. High bandwidth data transport system
US20100329247A1 (en) * 2003-04-30 2010-12-30 Lightwaves Systems, Inc. High bandwidth data transport system
US20050136699A1 (en) * 2003-12-19 2005-06-23 International Business Machines Corporation Signal channel configuration providing increased capacitance at a card edge connection
US6994563B2 (en) * 2003-12-19 2006-02-07 Lenovo (Singapore) Pte. Ltd. Signal channel configuration providing increased capacitance at a card edge connection
US20090110030A1 (en) * 2007-10-29 2009-04-30 Lightwaves Systems, Inc. High bandwidth data transport system
US7944978B2 (en) 2007-10-29 2011-05-17 Lightwaves Systems, Inc. High bandwidth data transport system
US20090110108A1 (en) * 2007-10-29 2009-04-30 Lightwaves Systems, Inc. High bandwidth data transport system
US20090110085A1 (en) * 2007-10-29 2009-04-30 Lightwaves Systems, Inc. High bandwidth data transport system
US8345778B2 (en) 2007-10-29 2013-01-01 Lightwaves Systems, Inc. High bandwidth data transport system
US8451879B2 (en) 2007-10-29 2013-05-28 Lightwaves Systems, Inc. High bandwidth data transport system
EP2605624A1 (en) * 2011-12-15 2013-06-19 Hosiden Corporation Flexible flat cable
CN103165228A (zh) * 2011-12-15 2013-06-19 星电株式会社 柔性扁平电缆
JP2013125700A (ja) * 2011-12-15 2013-06-24 Hosiden Corp フレキシブルフラットケーブル
EP2739125A1 (en) * 2012-11-28 2014-06-04 Tyco Electronics Svenska Holdings AB Electrical connection interface for connecting electrical leads for high speed data transmission
WO2014082761A1 (en) * 2012-11-28 2014-06-05 Tyco Electronics Svenska Holdings Ab Electrical connection interface for connecting electrical leads for high speed data transmission
US9860972B2 (en) 2012-11-28 2018-01-02 Finisar Corporation Electrical connection interface for connecting electrical leads for high speed data transmission
US20160120026A1 (en) * 2013-10-30 2016-04-28 Kyocera Corporation Circuit board, electronic component housing package, and electronic device
US10051725B2 (en) * 2013-10-30 2018-08-14 Kyocera Corporation Circuit board, electronic component housing package, and electronic device
US20170135202A1 (en) * 2015-11-05 2017-05-11 Sae Magnetics (H.K.) Ltd. Edge fingers of multi-layer printed circuit board
CN106686882A (zh) * 2015-11-05 2017-05-17 新科实业有限公司 多层印刷电路板的边缘手指
US9788419B2 (en) * 2015-11-05 2017-10-10 Sae Magnetics (H.K.) Ltd. Edge fingers of multi-layer printed circuit board
CN106686882B (zh) * 2015-11-05 2020-07-10 云晖科技有限公司 多层印刷电路板的边缘手指
US10057980B2 (en) * 2016-03-15 2018-08-21 Cisco Technology, Inc. Method and apparatus for reducing corrosion in flat flexible cables and flexible printed circuits
CN111465211A (zh) * 2020-06-02 2020-07-28 安徽方兴光电新材料科技有限公司 一种交错式bonding金属线路

Also Published As

Publication number Publication date
AR198749A1 (es) 1974-07-15
JPS5013891A (sv) 1975-02-13
ES425423A2 (es) 1976-11-16
IT1045723B (it) 1980-06-10
HK19879A (en) 1979-04-06
BR7403226D0 (pt) 1974-12-03
JPS58642B2 (ja) 1983-01-07
AU6735774A (en) 1975-10-02
CA1000823A (en) 1976-11-30
SE386997B (sv) 1976-08-23

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