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Browse Prior Art Database

Enhanced Flex Cross-Section for Force Transfer in Fine Grid Connector Applications

IP.com Disclosure Number: IPCOM000118994D
Original Publication Date: 1997-Oct-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Caletka, DV: AUTHOR [+4]

Abstract

Disclosed is a flexible circuit cross-section that utilizes copper bumps on opposing surfaces to provide for localized areas of higher compression on the elastomeric surface. This, in turn, produces higher forces on the bumps at the contact surface. The figure shows this design.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Enhanced Flex Cross-Section for Force Transfer in Fine Grid Connector
Applications

      Disclosed is a flexible circuit cross-section that utilizes
copper bumps on opposing surfaces to provide for localized areas of
higher compression on the elastomeric surface.  This, in turn,
produces higher forces on the bumps at the contact surface.  The
figure shows this  design.

      The carrier for this connector is a flexible
circuit.  Circuitry is formed on one side along with bumps or pads
plated with dendrites that contact the Printed Wiring Boards (PWBs)
that are to  be connected.  On the opposite surface of the flexible
circuit are additional bumps that transfer force through the flex,
forcing the contacts against the pads on the PWB.  It is the
provision of these bumps on the surface opposite the contact surface
that is taught herein.

      The function of the bumps is to reduce the constraint of the
elastomeric sheet so that greater variations in contact height can be
accommodated.  This design does not require features in the
elastomeric to provide such compliance and can be produced at very
low cost.