  We have designed and constructed a thin film preparation chamber with base
pressure of $<2 \times 10^{-9}$~mbar. Currently, the chamber is equipped with
two large area evaporators (a molecular evaporator and an electron-beam
evaporator), an ion sputtering gun, a thickness monitor and a substrate heater.
It is designed such that it can handle large area thin film samples with a
future possibility to transfer them in vacuum directly to the low energy muons
(LEM) spectrometer or to other advanced characterization facilities in the
Quantum Matter and Materials Center (QMMC) which will be constructed in 2024.
Initial commissioning of the chamber resulted in high quality, large area and
uniform molecular films of CuPc and TbPc$_2$ on various substrate materials. We
present first results from low energy $\mu$SR (LE-$\mu$SR) measurements on
these films.
