Surface investigations of vacuum Teflon thin films deposited on different materials suitable for medical applications and optoelectronics

We discuss in this progress report whether the surface investigations, means by ellipsometry, atomic force microscopy, spectroscopy and profilometry of Teflon (polytetrafluoroethlylene - PTFE) thin films deposed by electron sputtering in vacuum on different materials. The substrates materials can be used in bioengineering and medicine applications. We found that the surface morphology and structures properties of Teflon thin films depend of parameters selected in deposition process as deposition rate, substrates temperature, deposition temperature, electron activation energy. This study can be used to improve new medical applications and new optoelectronic devices. Recent reports in transfer cold friction of Teflon thin film layers are discussed in the context of material requirements for such special applications because the formation of or oriented networks gives new benefits of the surface obtained.