WO1997005675A1 - Electrical connection between printed circuit boards - Google Patents

Electrical connection between printed circuit boards Download PDF

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Publication number
WO1997005675A1
WO1997005675A1 PCT/GB1996/001781 GB9601781W WO9705675A1 WO 1997005675 A1 WO1997005675 A1 WO 1997005675A1 GB 9601781 W GB9601781 W GB 9601781W WO 9705675 A1 WO9705675 A1 WO 9705675A1
Authority
WO
Grant status
Application
Patent type
Prior art keywords
assembly
boards
tracks
connector member
electrically conductive
Prior art date
Application number
PCT/GB1996/001781
Other languages
French (fr)
Inventor
Gary Frank Sinfield
Original Assignee
Cinch Connectors 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

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCBs], 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
    • H01R12/50Fixed connections
    • H01R12/51Fixed connections for rigid printed circuits or like structures
    • H01R12/52Fixed connections for rigid printed circuits or like structures connecting to other rigid printed circuits or like structures
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RLINE CONNECTORS; CURRENT COLLECTORS
    • H01R12/00Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCBs], 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
    • H01R12/70Coupling devices
    • H01R12/71Coupling devices for rigid printing circuits or like structures
    • H01R12/72Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
    • H01R12/721Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures cooperating directly with the edge of the rigid printed circuits
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/36Assembling printed circuits with other printed circuits
    • H05K3/366Assembling printed circuits with other printed circuits substantially perpendicularly to each other
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/03Conductive materials
    • H05K2201/0302Properties and characteristics in general
    • H05K2201/0314Elastomeric connector or conductor, e.g. rubber with metallic filler
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/09Shape and layout
    • H05K2201/09209Shape and layout details of conductors
    • H05K2201/09654Shape and layout details of conductors covering at least two types of conductors provided for in H05K2201/09218 - H05K2201/095
    • H05K2201/09809Coaxial layout
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/30Assembling printed circuits with electric components, e.g. with resistor
    • H05K3/32Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
    • H05K3/325Assembling 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
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00Apparatus or processes for manufacturing printed circuits
    • H05K3/40Forming printed elements for providing electric connections to or between printed circuits
    • H05K3/403Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof

Abstract

Circuit boards are connected perpendicularly by means of a planar connector member (12) comprising a board with through holes containing wads of wire.

Description

Electrical Connection Between Printed Circuit Boards

The present invention relates to the interconnection of printed circuit boards and more particularly to such an interconnection utilising conductive parts incorporating resilient wads of wire for electrically interconnecting the boards. Mechanical interconnection is achieved separately from electrical interconnections.

Conventionally when interconnecting two printed circuit boards together for example when interconnecting a daughter board to a mother board, a socket type device is attached to the mother board which has resilient contacts. The daughter board is then inserted into the socket overcoming the spring force of the resilient contacts as it is inserted. This type of interconnection is convenient as it provides both electrical and mechanical connection between the two boards but it can result in extremely high insertion forces being required.

The present invention has, as an object, the provision an interconnection system which will substantially reduce insertion forces.

In order that the present invention be more readily understood, an embodiment thereof will now be described by way of example with reference to the accompanying drawings, in which:

Figure 1 shows a general arrangement of a daughter board connected to a mother board according to the present invention;

Figure 2 shows a part of a daughter board according to the present invention;

Figure 3 shows a diagrammatic exploded plan view of the connector arrangement shown in figure 1.

The present invention will be described in relation to the interconnection of a daughter board to a mother board but this terminology is not to imply any restriction on the relative sizes or uses of the two boards. The present invention is applicable to any number of different sizes and types of board.

As shown in figures 1 and 3, a mother board 10 is connected to a daughter board 11 by means of an interconnection system generally indicated by the reference numeral 12. The interconnection system comprises interconnector board 14 provided with a number of through holes 15 which contain wads of wire 16 which project from either side of the board 14 when uncompressed. The interconnection system 12 is attached to the mother board 10 by any convenient arrangement such as one or more clamping screws 18 which extend through holes 19 in the mother board to engage with threaded holes 20 in the board 14. If desired, guide pins can be provided in order to locate the interconnection broad 14 on the mother board prior to clamping and, as shown in figure 3, the interconnection board 14 can be provided with one or more guide pins 22 which are received in holes 23 in the mother board.

With the arrangement as described thus far, the wads of wire 16 make contact with conductive tracks on the surface of the mother. It is to be emphasises^ that these conductive tracks are conventionally on the major surface or surfaces of the printed circuit board.

If we now turn to the daughter board, the construction of the daughter board is somewhat unusual and if one looks at figure 2 it will be seen that the conductive tracks on the major surface or surfaces of the daughter board are extended onto the edge surface as indicated by the conductors 26. The extent by which the conductive tracks 26 extend onto the edge surface is only significant when the conductive tracks 26 have to be closely spaced together in which case it is convenient if alternate tracks are longer so as to permit the conductive wads 16 to be patterned in such a way as to make contact with conductive tracks 26 which are closer spaced together than would be possible due to the diameter of the holes 15 in the interconnection board 14.

In addition to normal conductive tracks 26 it is also possible to provide interconnections equivalent to coaxial connections as indicated by the conductive patterns 28 where the outer, U-shaped pattern represents the ground conductor.

As in the case of the mother' board, a mechanical guide arrangement between the daughter board and the interconnection board 14 can be provided. As shown in figure 3 this consists of further guide pins 28 on the interconnection board 14 which are received in recesses 29 in the daughter board.

Although not shown in the drawings, some form of mechanical clamping is required in order to hold the daughter board against the interconnection board 14 against the force of the resilient wads of wire which come into contact with the conductive tracks 26 and 28.

It will be appreciated that because the only insertion force required is the small force to compress the resilient wads of wire, an extremely high number of interconnections can be made while still maintaining very low insertion forces. Further, this is a solderless interconnection but with very good electrical properties. Due to its compact nature, the interconnection system 12 can be very compact and hence small boards can be interconnected very conveniently.

Claims

CLAIMS:
1. An assembly of two or more printed circuit boards in which at least two of the boards are connected to each other by means of a generally planar connector member having electrically conductive means extending from one of its major surfaces to the other.
2. An assembly as claimed in Claim 1 in which the connector member has a number of through holes containing said electrically conductive means.
3. An assembly as claimed in Claim 2 in which said electrically conductive means comprise wads of wire.
4. An assembly as claimed in Claim 1, 2 or 3 in which said at least two boards are positioned peφendicular to each other, with the connector member lying parallel to one ofthe boards.
5. An assembly as claimed in Claim 4 in which one ofthe boards has conductive tracks extending onto one or more of its edge surfaces, at least some of which contract said electrically conductive means.
6. An assembly as claimed in any preceding claim in which one ofthe boards is mechanically clamped to the connector member.
7. An assembly as claimed in any preceding claim including guide means for locating the or each of said at least two boards with respect of the connector member.
8. An assembly as claimed in Claim 7 in which the guide means comprise cooperating pins and holes.
9. An assembly as claimed in Claim 5, or any of Claims 6 to 8 when dependant on claim 5 wherein altemate conductive tracks on said one of the boards are longer than the other tracks.
10. An assembly as claimed in Claim 9 wherein said electrically conductive means are arranged to contact the ends of the tracks.
11. An assembly as claimed in Claim 5, 9 or 10 or any of Claims 6 to
8 when dependant on Claim 5 wherein said tracks include U-shaped tracks encircling the ends of other tracks.
12. An assembly substantially as herein before described with reference to the accompanying drawings.
PCT/GB1996/001781 1995-07-25 1996-07-25 Electrical connection between printed circuit boards WO1997005675A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9515234A GB9515234D0 (en) 1995-07-25 1995-07-25 Electrical connection between printed circuit boards
GB9515234.4 1995-07-25

Publications (1)

Publication Number Publication Date
WO1997005675A1 true true WO1997005675A1 (en) 1997-02-13

Family

ID=10778217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1996/001781 WO1997005675A1 (en) 1995-07-25 1996-07-25 Electrical connection between printed circuit boards

Country Status (2)

Country Link
GB (2) GB9515234D0 (en)
WO (1) WO1997005675A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395609A1 (en) * 1989-04-12 1990-10-31 Nokia Mobile Phones Ltd. Surface connector for radio frequency signals
WO1991001078A1 (en) * 1989-07-05 1991-01-24 Labinal Components & Systems, Inc. Electrical connectors
US5007843A (en) * 1983-05-31 1991-04-16 Trw Inc. High-density contact area electrical connectors
EP0584902A1 (en) * 1992-08-27 1994-03-02 Itt Industries, Inc. Stacking connector system
US5395249A (en) * 1993-06-01 1995-03-07 Westinghouse Electric Corporation Solder-free backplane connector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4421370A (en) * 1981-07-16 1983-12-20 Accutest Corporation Contact array
US5007841A (en) * 1983-05-31 1991-04-16 Trw Inc. Integrated-circuit chip interconnection system
US4813128A (en) * 1988-01-13 1989-03-21 Cray Research, Inc. High density disposable printed circuit inter-board connector
US4892487A (en) * 1989-06-15 1990-01-09 Ibm Corporation Connector assembly with movable carriage
US5122064A (en) * 1991-05-23 1992-06-16 Amp Incorporated Solderless surface-mount electrical connector
JP2545675B2 (en) * 1992-07-17 1996-10-23 信越ポリマー株式会社 Elastic connector manufacturing method of
US5244395A (en) * 1992-07-29 1993-09-14 Motorola, Inc. Circuit interconnect system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5007843A (en) * 1983-05-31 1991-04-16 Trw Inc. High-density contact area electrical connectors
EP0395609A1 (en) * 1989-04-12 1990-10-31 Nokia Mobile Phones Ltd. Surface connector for radio frequency signals
WO1991001078A1 (en) * 1989-07-05 1991-01-24 Labinal Components & Systems, Inc. Electrical connectors
EP0584902A1 (en) * 1992-08-27 1994-03-02 Itt Industries, Inc. Stacking connector system
US5395249A (en) * 1993-06-01 1995-03-07 Westinghouse Electric Corporation Solder-free backplane connector

Also Published As

Publication number Publication date Type
GB2303748A (en) 1997-02-26 application
GB9615638D0 (en) 1996-09-04 grant
GB9515234D0 (en) 1995-09-20 grant

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