A flexible circuit has contacts for mounting in a socket or card edge connector. The flexible circuit includes integrated circuit devices mounted on both sides of the edge connector contacts. Preferably, the flexible circuit is wrapped about an edge of a rigid substrate and presents contacts on both sides of the substrate for mounting in a socket. Multiple flexible circuits may be overlaid with the same strategy. The flexible circuit may exhibit one or two or more conductive layers, and may have changes in the layered structure or have split layers.