Patent ID: 7868440

Claim:
A packaged microdevice, comprising: a substrate including a mounting area, contacts in the mounting area, and external connectors electrically coupled to corresponding contacts; a die across from the mounting area and spaced apart from the substrate by a gap, wherein the die has an integrated circuit and pads electrically coupled to the integrated circuit; interconnects in the gap between the contacts and corresponding pads, with the interconnects comprising: first conductive elements in the gap electrically connected to contacts on the substrate, the first conductive elements comprising first gold bumps deposited onto the contacts of the substrate; second conductive elements in the gap electrically coupled to corresponding pads of the die, the second conductive elements comprising second gold bumps deposited onto the pads of the die; and a fixed diffusion joint between substantially each of the first and second gold bumps, and with first and second gold bumps separately identifiable in the interconnects after formation of the diffusion joint.