Connector with integral transmission line bus

• US 5,908,333 A
• Filed: 07/21/1997
• Issued: 06/01/1999
• Est. Priority Date: 07/21/1997
• Status: Expired due to Term

• Current Assignee: Rambus Inc.
• Original Assignee: Rambus Inc.
• Inventors: Dillon, deceased, John Bradly, Perino, Donald Victor, Gasbarro, James Anthony
• Primary Examiner(s): Abrams, Neil
• Application Number:
  US08/897,788
• Time in Patent Office: 680 Days
• Field of Search: 439/61, 439/631, 361/785, 361/775, 361/788, 172/71 B, 172/72 B, 172/88 B
• US Class Current: 439/631
• CPC Class Codes: H01R 12/7076 for connection between PCB and component, e.g. display
• CPC Class Codes: H01R 12/712 co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit H01R12/72 takes precedence
• CPC Class Codes: H01R 13/658 High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse] coaxial coupling devices specially adapted for high frequency H01R24/40; for flat or ribbon cable connectors H01R12/774; for coaxial cable H01R9/05

Abstract

A socket (14) includes a first bus conductor (22a) having two or more contact regions (24) and a second bus conductor (22b) arranged substantially parallel to the first bus conductor and having two or more contact regions (24). The first and second bus conductors are spaced relative to one another so as to provide a predetermined electrical impedance and may be arranged to carry electrical signals as transmission lines. A dielectric spacer (36) may be disposed between the first and second bus conductors to provide the spacing. Contact regions (24) of the first and second conductors (22a, 22b) may provide compliant coupling regions for the socket (14). The contact regions (24) of the first bus conductor (22a) may be positioned within the socket (14) so as to contact a lead disposed on a first side of a circuit element (16) and the contact regions (24) of the second bus conductor (22b) may be positioned within the socket (14) so as to contact the lead disposed on the second side of the circuit element (16).

Claims

1. An electrical connector comprising a plurality of bus conductors each running through the length of the connector yet being electrically isolated from one another and each having a number of compliant contact regions disposed at various positions along their respective lengths so as to provide electrical coupling points for like contact regions of electrical devices to be received within the connector, the bus conductors being divided into first and second groups such that across the width of the connector a bus conductor of the first group is positioned adjacent to a bus conductor of the second group that is positioned adjacent to yet another bus conductor of the first group, and so on for each of the plurality of bus conductors, the transmission line impedance of any pair of adjacent bus conductors, one being chosen from the first group and the other being chosen from the second group, being determinable, wherein each of the bus conductors of the first group are adapted to be electrically coupled to respective signal paths associated with a circuit board on which the connector is to be mounted through only two electrical contact elements regardless of the number of compliant contact regions, the two electrical contact elements of each bus conductor of the first group being arranged so that each is disposed substantially near an end of its respective bus conductor, and the bus conductors of the second group each being adapted to be electrically coupled to an electrical ground plane associated with the circuit board through a number of electrical contact elements disposed along their respective lengths, the number of electrical contact elements being irrespective of the number of compliant contact regions.

2. A connector as in claim 1 wherein a dielectric spacer is disposed between each adjacent bus conductor of the first and second groups.

3. A connector as in claim 2 wherein said compliant contact regions of said bus conductors comprise fingers offset from respective ones of said bus conductors through a bend.

4. A connector as in claim 2 wherein said compliant contact regions comprise elastomer-backed metal regions.

5. A connector as in claim 1 wherein said compliant contact regions of said bus conductors are made of a Beryllium-Copper (Be--Cu) alloy.

6. A connector as in claim 5 further comprising a dielectric spacer disposed between each adjacent bus conductor of the first and second groups.

7. A connector as in claim 1 wherein said compliant contact regions of said bus conductors comprise elastomer-backed metal regions.

8. A connector as in claim 1 wherein the compliant contact regions of bus conductors of the first group are arranged to contact a first side of the electrical devices and the compliant contact regions of bus conductors of the second group are arranged to contact a second side of the electrical devices.

9. A connector as in claim 8 wherein the compliant contact regions of the bus conductors are made of a Beryllium-Copper (Be--Cu) alloy.

10. A connector as in claim 8 wherein the compliant contact regions of the bus conductors comprise elastomer-backed metal regions.

11. A connector as in claim 8 wherein the compliant contact regions of the bus conductors comprise fingers offset from respective ones of the bus conductors through a bend.

12. A connector as in claim 1 wherein the signal paths comprise a plurality of traces on the circuit board.

13. A connector as in claim 12 wherein the compliant contact regions of the bus conductors comprise fingers offset from respective ones of the conductors through a bend.

14. A connector as in claim 12 wherein the compliant contact regions of the bus conductors comprise elastomer-backed metal regions.

15. A connector as in claim 1 wherein said electrical contact elements of said bus conductors of the first group comprise metal posts.

16. A connector as in claim 15 wherein said electrical contact elements of said bus conductors of the second group comprise metal posts.

17. A connector as in claim 16 wherein said metal posts of said bus conductors of the second group are disposed at approximately equal intervals over the lengths of each of said bus conductors of said second group.