Nano-technology as a new generation of quantum cellular automata(QCA) has developed at a high speed in recent years. With the purpose of improving the stability of QCA circuit
this thesis is going to provide a brand-new design. It suggests adopting tolerance fault one-bit full adder
then via the simulation and analysis by QCA Designer to check its feasibility and its tolerance of fault. This design
according to the authors view
would set a good example for the study of the complex QCA circuit.