Institutional research of nanoelectromagnetics


Università degli Studi di Cassino, Italy

A challenging problem in enabling nanoelectronics is given by the design and fabrication of efficient and reliable nano-interconnects. The limits of the conventional materials at nanoscale require innovation in both in the architectural concept of nano-interconnects and in the materials to be used. Due to their outstanding electrical, thermal and mechanical properties, carbon-based materials, such as Carbon Nanotubes (CNTs) or Graphene Nano-Ribbons (GNRs) have been proposed as alternative to copper to fabricate nano-interconnects. CNTs are rolled sheets of graphene, whereas GNRs are unrolled layers of graphene. The rapid progress in CNT and GNR fabrication technology made possible the first examples of successful integration between carbon-based interconnects and CMOS technologies. This pushes towards the quest for a more and more accurate and reliable models of such innovative interconnects. In this presentation, a general transmission line model will be given, which can be regarded as a common frame where conventional and carbon-based interconnects may be analyzed and compared. This model, although retaining the same simplicity of any TL model, is accurate enough to catch all those nanoscale phenomena which are of interest for the guided propagation, as for instance the quantistic and inertial effects related to the collective motion of the conduction electrons. The TL model is derived from a semi-classical electrodynamics model of the motion of the conduction electrons along the carbon-based interconnects, and accounts for the effects of size shrinking and of temperature raise. Using this model and referring to nano-interconnect arrangement of practical interest, a performance comparison will be carried out between copper, CNT, GNR and hybrid solutions.