US Patent 10451652 Coaxial structure for transmission of signals in test equipment

An example system includes a circuit board having electrical elements; a wafer having contacts; and an interconnect to route signals between the electrical elements and the contacts. The interconnect includes multiple layers, each of which includes a flexible circuit. The flexible circuit includes a conductive trace disposed thereon. The interconnect also includes shielding between adjacent layers of the multiple layers. The shielding is electrically connected to ground.