3-dimensional configuration to promote timely settling of quantum-dot cellular automata

Asymmetric spacing is a previously proposed design methodology for removing the possibility of metastable states in Quantum-dot Cellular Automata (QCA). A new three-dimensional architecture is presented which should yield the same effect. Both the asymmetric method and the 3D architecture are compared and contrasted. Simulations on the propagation of a signal down a binary wire indicate that this new architecture is an effective way to remove the meta-stable states.