In order to achieve the desired one-half wavelength interconnection spacing present at the backing of the transducer module, an intermediary flexible printed circuit and other custom structures provide a transitional architecture between 42 AWG coax and in line interconnect pads at a 300 micron spacing. Due to critical alignment requirements, special processes are needed for fabrication and the successful connection of the fine-pitch circuit elements. A conductive anisotropic elastomeric material acts as the medium to effect the final interconnet between the PGA and transducer module. Because the anisotropic medium provides a separable interface, the interconnect system allows repeated connection.
Acoustic performance indicates suitability for diagnostic imaging.