manufacturing yield of qca circuits by synthesized dna self-assembled templates
DNA self-assembly has been proposed as a promising "bottomup" manufacturing technique to supersede photolithography at nanometer scale. This paper discusses the application of DNA self-assembly for manufacturing templates of QCA circuits. Using a synthesis algorithm, a tile set of reduced cardinality is utilized for growing multiple patterns of the same QCA circuit on a two-dimensional template. Errors in the DNA self-assembly process are then considered; their implications on the operation of faulty QCA circuits following the deposition of QCA cells, are discussed. The errors are mostly clustered and along facets; a detailed treatment with respect to manufacturing yield, circuit functionality, error tolerance and growth speed is pursued. As a general conclusion, it is shown that errors are pattern dependent, hence the faults occurring in the assembled QCA circuits are physically and logically different.
manufacturing defect tolerance nanotechnology design