Dielectric and electret properties of nanoemulsion spin-on polytetrafluoroethylene films

Nanoemulsion polytetrafluoroethylene (nano-PTFE) is a promising low-dielectric-constant polymer, which can be prepared in thin-film form by spin-on techniques. Similarities and differences of the nano-PTFE material to the well-known class of PTFE polymers with respect to morphology and dielectric and electret characteristics are discussed. Nano-PTFE shows excellent dielectric properties up to 300 °C, and a charge stability that compares favorably with other members of the PTFE class. Nano-PTFE enlarges the family of PTFE materials and may become interesting for applications in microelectronics and miniaturized electret devices.