Patent ID: 6926537

Claim:
An interposer sub-assembly comprising a circuit member having a plurality of contact pads and a pair of circuit member joining apertures, each circuit member joining aperture having a perimeter and a diameter; a bolster plate having a pair of bolster plate joining apertures wherein the bolster plate joining apertures and the circuit member joining apertures are aligned; a pair of resilient retention members on the circuit member, each resilient retention member proximate to one circuit member joining aperture and extending inwardly past the perimeter of the circuit member joining aperture and into the circuit member joining aperture, the resilient retention member forming part of said circuit member or an overlay adhered to said circuit member; and two fasteners, each fastener having a thread with a major diameter and a minor diameter, the major diameter being less than the circuit member joining aperture diameter, said fasteners passed through two aligned joining apertures, and each said fastener including a head engaging the bolster plate; said thread for each fastener engaging and deforming a retention member proximate such thread so that the retention members and heads hold the circuit member and bolster plate together.