Abstract: A signal processing module can be manufactured from a plurality of composite substrate layers, each substrate layer includes elements of multiple individual processing modules. Surfaces of the layers are selectively metalicized to form signal processing elements when the substrate layers are fusion bonded in a stacked arrangement. Prior to bonding, the substrate layers are milled to form gaps located at regions between the processing modules. Prior to bonding, the leads are positioned such that they extend from signal coupling points on said metalicized surfaces into the gap regions. The substrate layers are then fusion bonded to each other such that the plurality of substrate layers form signal processing modules with leads that extend from an interior of the modules into the gap areas. The individual modules may then be separated by milling the substrate layers to de-panel the modules.