GB2303748A - Electrical connection between printed ciruit boards - Google Patents
Electrical connection between printed ciruit boards Download PDFInfo
- Publication number
- GB2303748A GB2303748A GB9615638A GB9615638A GB2303748A GB 2303748 A GB2303748 A GB 2303748A GB 9615638 A GB9615638 A GB 9615638A GB 9615638 A GB9615638 A GB 9615638A GB 2303748 A GB2303748 A GB 2303748A
- Authority
- GB
- United Kingdom
- Prior art keywords
- assembly
- tracks
- boards
- board
- connector member
- 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- Withdrawn
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
- 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
- H01R12/72—Coupling devices for rigid printing circuits or like structures coupling with the edge of the rigid printed circuits or like structures
- H01R12/721—Coupling 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
-
- 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
- H05K3/36—Assembling printed circuits with other printed circuits
- H05K3/366—Assembling printed circuits with other printed circuits substantially perpendicularly to each other
-
- 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
- H05K2201/03—Conductive materials
- H05K2201/0302—Properties and characteristics in general
- H05K2201/0314—Elastomeric connector or conductor, e.g. rubber with metallic filler
-
- 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
- H05K2201/09809—Coaxial 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
- 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
-
- 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
- H05K3/40—Forming printed elements for providing electric connections to or between printed circuits
- H05K3/403—Edge contacts; Windows or holes in the substrate having plural connections on the walls thereof
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Combinations Of Printed Boards (AREA)
Abstract
Circuit boards 10, 11 are connected, preferably perpendicularly, by means of a planar connector member 12 comprising a board with through holes containing wads of wire 16. At least one board is clamped to the member, which includes locating projections 22, 28. The tracks on a board preferably pass onto the edge of the board and alternate tracks are longer than the other tracks, or define U-shaped tracks encircling others of the tracks.
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 emphasisegd 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 (12)
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 perpendicular to each other, with the connector member lying parallel to one of the boards.
5. An assembly as claimed in Claim 4 in which one of the 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 of the 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 alternate 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.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9515234A GB9515234D0 (en) | 1995-07-25 | 1995-07-25 | Electrical connection between printed circuit boards |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9615638D0 GB9615638D0 (en) | 1996-09-04 |
GB2303748A true GB2303748A (en) | 1997-02-26 |
Family
ID=10778217
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9515234A Pending GB9515234D0 (en) | 1995-07-25 | 1995-07-25 | Electrical connection between printed circuit boards |
GB9615638A Withdrawn GB2303748A (en) | 1995-07-25 | 1996-07-25 | Electrical connection between printed ciruit boards |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9515234A Pending GB9515234D0 (en) | 1995-07-25 | 1995-07-25 | Electrical connection between printed circuit boards |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU6620196A (en) |
GB (2) | GB9515234D0 (en) |
WO (1) | WO1997005675A1 (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4421370A (en) * | 1981-07-16 | 1983-12-20 | Accutest Corporation | Contact array |
US4813128A (en) * | 1988-01-13 | 1989-03-21 | Cray Research, Inc. | High density disposable printed circuit inter-board connector |
EP0395609A1 (en) * | 1989-04-12 | 1990-10-31 | Nokia Mobile Phones Ltd. | Surface connector for radio frequency signals |
EP0402613A2 (en) * | 1989-06-15 | 1990-12-19 | International Business Machines Corporation | Connector assembly with movable carriage |
US5007841A (en) * | 1983-05-31 | 1991-04-16 | Trw Inc. | Integrated-circuit chip interconnection system |
US5007843A (en) * | 1983-05-31 | 1991-04-16 | Trw Inc. | High-density contact area electrical connectors |
US5122064A (en) * | 1991-05-23 | 1992-06-16 | Amp Incorporated | Solderless surface-mount electrical connector |
US5244395A (en) * | 1992-07-29 | 1993-09-14 | Motorola, Inc. | Circuit interconnect system |
GB2269061A (en) * | 1992-07-17 | 1994-01-26 | Shinetsu Polymer Co | Elastic interconnector |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5013249A (en) * | 1986-06-19 | 1991-05-07 | Labinal Components And 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 |
-
1995
- 1995-07-25 GB GB9515234A patent/GB9515234D0/en active Pending
-
1996
- 1996-07-25 GB GB9615638A patent/GB2303748A/en not_active Withdrawn
- 1996-07-25 AU AU66201/96A patent/AU6620196A/en not_active Abandoned
- 1996-07-25 WO PCT/GB1996/001781 patent/WO1997005675A1/en active Application Filing
Patent Citations (9)
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 |
US5007843A (en) * | 1983-05-31 | 1991-04-16 | Trw Inc. | High-density contact area electrical connectors |
US4813128A (en) * | 1988-01-13 | 1989-03-21 | Cray Research, Inc. | High density disposable printed circuit inter-board connector |
EP0395609A1 (en) * | 1989-04-12 | 1990-10-31 | Nokia Mobile Phones Ltd. | Surface connector for radio frequency signals |
EP0402613A2 (en) * | 1989-06-15 | 1990-12-19 | International Business Machines Corporation | Connector assembly with movable carriage |
US5122064A (en) * | 1991-05-23 | 1992-06-16 | Amp Incorporated | Solderless surface-mount electrical connector |
GB2269061A (en) * | 1992-07-17 | 1994-01-26 | Shinetsu Polymer Co | Elastic interconnector |
US5244395A (en) * | 1992-07-29 | 1993-09-14 | Motorola, Inc. | Circuit interconnect system |
Also Published As
Publication number | Publication date |
---|---|
GB9615638D0 (en) | 1996-09-04 |
WO1997005675A1 (en) | 1997-02-13 |
AU6620196A (en) | 1997-02-26 |
GB9515234D0 (en) | 1995-09-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |