The mandate of the TFG lab in EP-DT is to give support to the different CERN experiments in terms of thin film coating as well as glass and ceramic machining. The activity in the Thin Film Lab covers the large field of Physical Vapour Deposition (PVD) based coatings. Metals, dielectrics and also organic materials can be evaporated. Most layers are for optical use but also other functional layers can be produced. Our specialised Glass and Ceramic Workshop is equipped with dedicated diamond tools for hard material machining. This allows us to deal with specific material such as Glass, Pyrex, Quartz, Sapphire, Alumina, Ferrites and other ceramics. For the quality control of these 2 branches (Coating +glass/ceramics machining) we have in our Optical Quality Control Lab several microscopes and spectrometers for the testing of our products.