Dielectric and electret properties of nanoemulsion spin-on polytetrafluoroethylene films

Nanoemulsion polytetrafluoroethylene (nano-PTFE) is a promising low-dielect ric-constant polymer, which can be prepared in thin-film form by spin-on te chniques. Similarities and differences of the nano-PTFE material to the wel l-known class of PTFE polymers with respect to morphology and dielectric an d electret characteristics are discussed. Nano-PTFE shows excellent dielect ric properties up to 300 degrees C, and a charge stability that compares fa vorably with other members of the PTFE class. Nano-PTFE enlarges the family of PTFE materials and may become interesting for applications in microelec tronics and miniaturized electret devices. (C) 2000 American Institute of P hysics. [S0003-6951(00)04118-8].