Abstract: A three-dimensional circuit structure suited for a routing type electronic switcher matrix, for analog or digital signals, in which internal wire interconnections are not required.Plural parallel-disposed zero-insertion-force connectors are orthogonally related on opposite sides of mother-boards that divide tiers in the structure.Selected conductive pins of the connectors are electrically connected to make necessary interconnections.Printed circuit cards are inserted in the zero-insertion-force connectors for carrying a large plurality of solid-state, or equivalent, cross points, and are inter-connected by the selected conductive pins.