Palmieri, V. The Way of Thick Films toward a Flat Q-curve in Sputtered Cavities JACoW Geneva, Switzerland 978-3-95450-191-5 10.18429/JACoW-SRF2017-TUYBA03 English 378-381 TUYBA03 ion cavity niobium interface site Contribution to a conference proceedings 2018 2018-01 https://doi.org/10.18429/JACoW-SRF2017-TUYBA03 http://jacow.org/srf2017/papers/tuyba03.pdf Thick films have bulk like properties. In this paper it is explored the possibility to sputter 70 micron thick films in order to get rid of the Q-slope in Niobium sputtered Cop-per Cavities. An innovative method based on the multi-layer deposition of zero-stress single layers is reported. The deposition of zero-stress thick films into 6 GHz Cop-per seamless cavities, has shown the possibility to obtain straight curves for the Q-factor versus accelerating fields