GB2155251A - Anisotropic electrical connectors - Google Patents

Anisotropic electrical connectors Download PDF

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Publication number
GB2155251A
GB2155251A GB8503465A GB8503465A GB2155251A GB 2155251 A GB2155251 A GB 2155251A GB 8503465 A GB8503465 A GB 8503465A GB 8503465 A GB8503465 A GB 8503465A GB 2155251 A GB2155251 A GB 2155251A
Authority
GB
United Kingdom
Prior art keywords
fibres
connector
tows
electrical connector
laminate
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Withdrawn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
GB8503465A
Other versions
GB8503465D0 (en
Inventor
Colin Sydney Osborne
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.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB8503465D0 publication Critical patent/GB8503465D0/en
Publication of GB2155251A publication Critical patent/GB2155251A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/22—Contacts for co-operating by abutting
    • H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
    • H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
    • H01R13/2414—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means conductive elastomers
    • 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
    • H01R12/51—Fixed connections for rigid printed circuits or like structures
    • H01R12/52—Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • 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
    • H01R12/70—Coupling devices
    • H01R12/71—Coupling devices for rigid printing circuits or like structures
    • H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
    • H01R12/714—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit with contacts abutting directly the printed circuit; Button contacts therefore provided on the printed circuit
    • 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
    • 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
    • H01R12/70—Coupling devices
    • H01R12/7082—Coupling device supported only by cooperation with PCB
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R31/00—Coupling parts supported only by co-operation with counterpart
    • H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
    • 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
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/325—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor

Landscapes

  • Coupling Device And Connection With Printed Circuit (AREA)

Abstract

An electrical connector consists of a body of silicon elastomer (14,32) with a number of carbon fibres (12) extending through the body. The fibres are substantially parallel, very finely pitched and insulated from each other so that the connector conducts in the direction of the fibres with virtually no conduction in other directions. A very thin connector can be positioned between a chip and a substrate (Figure 2, not shown) to connect the contact pads on the chip to conductors on the substrate or between butting ends of multi-terminal connectors (Figure 3, not shown). The fibres may extend along the length of a thin tape (32, Figure 4) Accurate location of the connector is not required and it is virtually independent of thermal expansion and can be made gas tight due to the resilience of the silicon elastomer. <IMAGE>

Description

SPECIFICATION Improvements in electrical connectors This invention relates to electrical connectors and more particularly relates to electrical connectors for connecting a first plurality of finely pitched conductors to a second plurality of finely pitched conductors.
One such example is the mounting of the chip in an integrated circuit. As more complex and smaller chips are developed they have more connections which must be smaller and have finer pitches. joining these to contact pads on the substrate of the integrated circuit therefore is becoming more difficult and time consuming and hence more expensive.
It is an object of the present invention to provide an electrical connector which will more easily permit the connection of very small finely pitched conductors.
According to the present invention an electrical connector comprises an insulating member with a plurality of conductive fibres therein, the fibres being arranged substantially parallel to each other singly or in tows, each fibre or tow extending completely through the member and being insulated from the other fibres or tows by the insulating material of the member.
Preferably, the insulating member comprises a thin laminate.
The fibres or tows may be arranged substantially in the plane of the laminate or they may be substantially perpendicular to the laminate. The laminate may have a square, rectangular, or circular shape.
The fibres or tows may be metal plated to improve their conductivity.
The fibres are preferably carbon fibres.
The insulating material is preferably a silicon elastomer.
Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings in which: Figure 1 is a cutaway perspective view of an electrical connector according to the invention; Figure 2 illustrates the connector of Figure 1 used for mounting a chip on a substrate; Figure 3 illustrates a circular connector for connecting two multi-conductor circular electrical connectors; and, Figure 4 shows a thin elongate connector suitable for connecting more distant components.
Figure 1 is a cutaway respective view of an electrical connector 10 constructed from a silicon elastomer such as a silicon polymer. A plurality of carbon fibres 12 extends completely through the connector and the ends of the carbon fibres are exposed where they meet the surface 14 and 16 of the connector. The fibres are arranged substantially parallel to each other on a very fine pitch but are insulated from each other by the silicon polymer. The connector 10 may consist of a thin member having a plurality of fibres arranged only in one plane or the connector may be square, rectangular, circular or any other suitable shape with the fibres regularly arranged through the connector.
Tows of carbon fibres can be used in addition to or instead of the individual fibres shown, and the fibres can be metal coated with, for example, copper or aluminium to improve their conductivity.
It will be seen that the connector 10 will conduct between the surfaces 14 and 16 with virtually no conduction across the connector.
Figure 2 illustrates a chip 18 with contact pads (not shown) mounted on a substrate 20 with surface tracking and contacts 21. Instead of the more usual wires connecting the contact pads on the chip to the larger contacts on the substrate a very thin connector 22 of the type shown in Figure 1 is located between the chip 18 and the substrate 20.
The connector 22 conducts from top to bottom and thus connects the contact pads of the chip 18 with the appropriate surface tracking on the subtrate 20.
Accurate location of the chip relative to the substrate is still required, but the connector 22 need not be accurately positioned and is virtually independent of thermal expansion and can be made gas-tight.
A similar disc-shaped connector 24 adapted to conduct horizontally as seen in Figure 3 can be used with circular connectors 26 and 28, each having a plurality of "butt end" contacts 30 to provide a gas-tight joint. For square and other shaped connectors, a correspondingly square or other shaped silicon elastomer/carbon fibre connector can be provided.
With insulated carbon fibres laid lengthwise within a silicon polymer strip 32 as shown in Figure 4, a form of ribbon cable can be produced.
Bunched fibres or tows may be used to provide a similar product. In both cases the cable can be cut at any point and by applying pressure, a gas tight joint can be made to a printed circuit board 34 having contacts 36 without the need for an intermediate connector. Thus remotely located printed circuit boards or other devices can be connected.
1. An electrical connector comprising an insulating member with a plurality of electrically conductive fibres therein, the fibres being arranged substantially parallel to each other singly or in tows, each fibre or tow being insulated from the other fibres or tows by the insulating material of the member and extending completely through the member.
2. An electrical connector as claimed in claim 1 in which the insulating member comprises a thin laminate.
3. An electrical connector as claimed in claim 2 in which the fibres or tows are arranged substantially in the plane of the laminate.
4. An electrical connector as claimed in claim 3 in which the fibres or tows are arranged substantially perpendicular to the laminate.
5. An electrical connector as claimed in claim 3 or 4 in which the laminate has a square, rectangular, circular, or any other suitable shape.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in electrical connectors This invention relates to electrical connectors and more particularly relates to electrical connectors for connecting a first plurality of finely pitched conductors to a second plurality of finely pitched conductors. One such example is the mounting of the chip in an integrated circuit. As more complex and smaller chips are developed they have more connections which must be smaller and have finer pitches. joining these to contact pads on the substrate of the integrated circuit therefore is becoming more difficult and time consuming and hence more expensive. It is an object of the present invention to provide an electrical connector which will more easily permit the connection of very small finely pitched conductors. According to the present invention an electrical connector comprises an insulating member with a plurality of conductive fibres therein, the fibres being arranged substantially parallel to each other singly or in tows, each fibre or tow extending completely through the member and being insulated from the other fibres or tows by the insulating material of the member. Preferably, the insulating member comprises a thin laminate. The fibres or tows may be arranged substantially in the plane of the laminate or they may be substantially perpendicular to the laminate. The laminate may have a square, rectangular, or circular shape. The fibres or tows may be metal plated to improve their conductivity. The fibres are preferably carbon fibres. The insulating material is preferably a silicon elastomer. Embodiments of the invention will now be described by way of example only with reference to the accompanying drawings in which: Figure 1 is a cutaway perspective view of an electrical connector according to the invention; Figure 2 illustrates the connector of Figure 1 used for mounting a chip on a substrate; Figure 3 illustrates a circular connector for connecting two multi-conductor circular electrical connectors; and, Figure 4 shows a thin elongate connector suitable for connecting more distant components. Figure 1 is a cutaway respective view of an electrical connector 10 constructed from a silicon elastomer such as a silicon polymer. A plurality of carbon fibres 12 extends completely through the connector and the ends of the carbon fibres are exposed where they meet the surface 14 and 16 of the connector. The fibres are arranged substantially parallel to each other on a very fine pitch but are insulated from each other by the silicon polymer. The connector 10 may consist of a thin member having a plurality of fibres arranged only in one plane or the connector may be square, rectangular, circular or any other suitable shape with the fibres regularly arranged through the connector. Tows of carbon fibres can be used in addition to or instead of the individual fibres shown, and the fibres can be metal coated with, for example, copper or aluminium to improve their conductivity. It will be seen that the connector 10 will conduct between the surfaces 14 and 16 with virtually no conduction across the connector. Figure 2 illustrates a chip 18 with contact pads (not shown) mounted on a substrate 20 with surface tracking and contacts 21. Instead of the more usual wires connecting the contact pads on the chip to the larger contacts on the substrate a very thin connector 22 of the type shown in Figure 1 is located between the chip 18 and the substrate 20. The connector 22 conducts from top to bottom and thus connects the contact pads of the chip 18 with the appropriate surface tracking on the subtrate 20. Accurate location of the chip relative to the substrate is still required, but the connector 22 need not be accurately positioned and is virtually independent of thermal expansion and can be made gas-tight. A similar disc-shaped connector 24 adapted to conduct horizontally as seen in Figure 3 can be used with circular connectors 26 and 28, each having a plurality of "butt end" contacts 30 to provide a gas-tight joint. For square and other shaped connectors, a correspondingly square or other shaped silicon elastomer/carbon fibre connector can be provided. With insulated carbon fibres laid lengthwise within a silicon polymer strip 32 as shown in Figure 4, a form of ribbon cable can be produced. Bunched fibres or tows may be used to provide a similar product. In both cases the cable can be cut at any point and by applying pressure, a gas tight joint can be made to a printed circuit board 34 having contacts 36 without the need for an intermediate connector. Thus remotely located printed circuit boards or other devices can be connected. CLAIMS
1. An electrical connector comprising an insulating member with a plurality of electrically conductive fibres therein, the fibres being arranged substantially parallel to each other singly or in tows, each fibre or tow being insulated from the other fibres or tows by the insulating material of the member and extending completely through the member.
2. An electrical connector as claimed in claim 1 in which the insulating member comprises a thin laminate.
3. An electrical connector as claimed in claim 2 in which the fibres or tows are arranged substantially in the plane of the laminate.
4. An electrical connector as claimed in claim 3 in which the fibres or tows are arranged substantially perpendicular to the laminate.
5. An electrical connector as claimed in claim 3 or 4 in which the laminate has a square, rectangular, circular, or any other suitable shape.
6. An electrical connector as claimed in any preceding claim in which the fibres are carbon fibres.
7. An electrical connector as claimed in any preceding claim in which the fibres are metal plated to increase their electrical conductivity.
8. An electrical connector constructed and adapted to operate substantially as hereinbefore described with reference to Figures 1 and 2, 3 or 4 of the accompanying drawings.
GB8503465A 1984-03-02 1985-02-11 Anisotropic electrical connectors Withdrawn GB2155251A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8405598A GB8405598D0 (en) 1984-03-02 1984-03-02 Electrical connectors

Publications (2)

Publication Number Publication Date
GB8503465D0 GB8503465D0 (en) 1985-03-13
GB2155251A true GB2155251A (en) 1985-09-18

Family

ID=10557526

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8405598A Pending GB8405598D0 (en) 1984-03-02 1984-03-02 Electrical connectors
GB8503465A Withdrawn GB2155251A (en) 1984-03-02 1985-02-11 Anisotropic electrical connectors

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8405598A Pending GB8405598D0 (en) 1984-03-02 1984-03-02 Electrical connectors

Country Status (2)

Country Link
JP (1) JPS6110885A (en)
GB (2) GB8405598D0 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808112A (en) * 1986-09-25 1989-02-28 Tektronix, Inc. High density connector design using anisotropically pressure-sensitive electroconductive composite sheets
US5049090A (en) * 1990-02-02 1991-09-17 Applied Microsystems Corporation Electrical connector
EP0508635A2 (en) * 1991-04-11 1992-10-14 Tektronix Inc. Attenuator apparatus and method of assembly
EP0521672A1 (en) * 1991-07-01 1993-01-07 AT&T Corp. Integrated circuit interconnection technique
EP0547852A2 (en) * 1991-12-18 1993-06-23 Xerox Corporation Multilayer wiring board, interlevel connector, and method for making same
EP0558855A2 (en) * 1992-03-02 1993-09-08 AT&T Corp. Circuit board stack with novel cross-over cells
WO2000033427A1 (en) * 1998-11-30 2000-06-08 Intel Corporation Controlling the heat expansion of electrical couplings

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488226A (en) * 1975-01-24 1977-10-12 Seiko Instr & Electronics Liquid crystal display device
GB1493544A (en) * 1975-09-08 1977-11-30 Duff Norton Co Mechanical actuator
US4149026A (en) * 1975-09-12 1979-04-10 Amp Incorporated Multi-pair cable having low crosstalk
GB2048582A (en) * 1979-04-02 1980-12-10 Germar Ind Group Multiple-lead electrical connector
GB2069251A (en) * 1980-02-09 1981-08-19 Shinetsu Polymer Co Electric connectors for pin terminals
GB2094567A (en) * 1981-01-26 1982-09-15 Nat Res Dev Apparatus including electric current transfer
US4443277A (en) * 1982-09-23 1984-04-17 Northern Telecom Limited Method of making a telecommunications cable from a shaped planar array of conductors
EP0110383A2 (en) * 1982-12-01 1984-06-13 Toray Industries, Inc. Low resistance elastic connector and preparation of the same
GB2133227A (en) * 1982-12-07 1984-07-18 Shinetsu Polymer Co An electrical connector for flat cables

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1488226A (en) * 1975-01-24 1977-10-12 Seiko Instr & Electronics Liquid crystal display device
GB1493544A (en) * 1975-09-08 1977-11-30 Duff Norton Co Mechanical actuator
US4149026A (en) * 1975-09-12 1979-04-10 Amp Incorporated Multi-pair cable having low crosstalk
GB2048582A (en) * 1979-04-02 1980-12-10 Germar Ind Group Multiple-lead electrical connector
GB2069251A (en) * 1980-02-09 1981-08-19 Shinetsu Polymer Co Electric connectors for pin terminals
GB2094567A (en) * 1981-01-26 1982-09-15 Nat Res Dev Apparatus including electric current transfer
US4443277A (en) * 1982-09-23 1984-04-17 Northern Telecom Limited Method of making a telecommunications cable from a shaped planar array of conductors
EP0110383A2 (en) * 1982-12-01 1984-06-13 Toray Industries, Inc. Low resistance elastic connector and preparation of the same
GB2133227A (en) * 1982-12-07 1984-07-18 Shinetsu Polymer Co An electrical connector for flat cables

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4808112A (en) * 1986-09-25 1989-02-28 Tektronix, Inc. High density connector design using anisotropically pressure-sensitive electroconductive composite sheets
US5049090A (en) * 1990-02-02 1991-09-17 Applied Microsystems Corporation Electrical connector
EP0508635A2 (en) * 1991-04-11 1992-10-14 Tektronix Inc. Attenuator apparatus and method of assembly
EP0508635A3 (en) * 1991-04-11 1993-01-13 Tektronix Inc. Attenuator apparatus and method of assembly
US5200717A (en) * 1991-04-11 1993-04-06 Tektronix, Inc. Active electrical circuitry interconnected and shielded by elastomer means
EP0521672A1 (en) * 1991-07-01 1993-01-07 AT&T Corp. Integrated circuit interconnection technique
EP0547852A2 (en) * 1991-12-18 1993-06-23 Xerox Corporation Multilayer wiring board, interlevel connector, and method for making same
EP0547852A3 (en) * 1991-12-18 1994-02-16 Xerox Corp
EP0558855A2 (en) * 1992-03-02 1993-09-08 AT&T Corp. Circuit board stack with novel cross-over cells
EP0558855A3 (en) * 1992-03-02 1996-05-01 American Telephone & Telegraph Circuit board stack with novel cross-over cells
WO2000033427A1 (en) * 1998-11-30 2000-06-08 Intel Corporation Controlling the heat expansion of electrical couplings
US6221459B1 (en) 1998-11-30 2001-04-24 Intel Corporation Controlling the heat expansion of electrical couplings

Also Published As

Publication number Publication date
GB8503465D0 (en) 1985-03-13
GB8405598D0 (en) 1984-04-04
JPS6110885A (en) 1986-01-18

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)