Behaviour of CPW and TFMS lines at high temperature for RF applications in sub-45nm nodes
Coplanar waveguide (CPW) and thin film microstrip (TFMS) lines integrating porous ultra low-k as inter-metal dielectric layers (k=2.5) and copper as metal, are for the first time experimentally measured up to 110GHz and under different temperature conditions, up to 200C. The extracted attenuation and propagation coefficients of those transmission lines are compared to simulations performed with MAGWEL software, a frequency domain 3-D Maxwell solver. Based on the characterization results some guidelines related to interconnect design are presented for future applications.
propagation interconnects ulk hf measurements temperature behaviour 45nm node