Browse Prior Art Database

Area Array Co-Axial Cable Termination and Interconnection

IP.com Disclosure Number: IPCOM000112841D
Original Publication Date: 1994-Jun-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Brodsky, WL: AUTHOR [+3]

Abstract

This article relates to making electrical contact of an array of contacts. Especially involving the termination of co-axial cables into an array and mating them to a printed circuit carrier having an array of mating connector pads.

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This is the abbreviated version, containing approximately 100% of the total text.

Area Array Co-Axial Cable Termination and Interconnection

      This article relates to making electrical contact of an array
of contacts.  Especially involving the termination of co-axial cables
into an array and mating them to a printed circuit carrier having an
array of mating connector pads.

      First the co-axial cable ends are cut and stripped as shown in
Fig. 1.  The center conductor is placed in thru holes or vias in a
rigid insulating member (i.e., ceramic, FR-4, etc.), In Fig. 2
certain holes have nail heads installed to connect the ground signals
to the mating member.  Then the co-axial cable ground shields are
soldered to the metallized back surface of the insulating members,
connecting the co-axial cable shields to the nail heads.

      After the cables are assembled to the insulating member the
length of conductor exposed can be machined to length by shearing,
grinding, etc.  After the conductors are the correct length they are
then exposed to a laser that melts the conductor.  The molten
conductor forms into a ball by surface tension and locks the
conductors into the insulating member.  Fig. 3 shows a cross-section
of this.  The contact spheres can now be plated with a typical
precious metal plating of nickel and gold.  This forms one-half of a
connector system.

      This array is then assembled to the mating circuit carrier and
held with a sufficient force to make a reliable electrical
connection.