In the EM-Group the Leica MED 020 is used as a dedicated evaporation instrument. It is equipped with a quartz-balance film thickness monitor, electron beam and two source thermal evaporation devices. Routinely, it is used to prepare thin, transparent carbon films for transmission electron microscopy and, if necessary, to carbon coat SEM samples. The carbon film thickness prepared with this machine ranges from as low as 10 nm to approximately 500 nm. However, successive coating is possible.