In recent years, there has been a significant interest of the scientific community on nanocellular polymeric
foams as a possible next generation of materials with a low dielectric constant for microelectronics
applications In this work, the dielectric behavior of microcellular and nanocellular poly (methyl methacrylate)
(PMMA) based foams has been characterized, both as a function of frequency and temperature,
in order to analyze the effect of reducing the cell size to the nanoscale on the dielectric properties.
Experimental results have shown clear differences in the dielectric behavior of the samples with cell
sizes in the nanoscale as well as a sharp reduction of the dielectric constant when the porosity increases.
