An interconnect for testing semiconductor components includes a substrate, and
contacts on the substrate for making temporary electrical connections with bumped
contacts on the components. Each contact includes a recess and a pattern of leads
cantilevered over the recess configured to electrically engage a bumped contact.
The leads are adapted to move in a z-direction within the recess to accommodate
variations in the height and planarity of the bumped contacts. In addition, the
leads can include projections for penetrating the bumped contacts, a non-bonding
outer layer for preventing bonding to the bumped contacts, and a curved shape which
matches a topography of the bumped contacts. The leads can be formed by forming
a patterned metal layer on the substrate, by attaching a polymer substrate with
the leads thereon to the substrate, or be etching the substrate to form conductive beams.