Protonic ceramic cells have attracted tremendous attention in the past decades due to their unique advantages, such as lower operating temperature and easier reversible operation. Moreover, in recent years, the hydrogen economy has been strongly favored by governmental and industrial bodies worldwide. To improve the development of proton conductor-based cells, rational design of high-performance electrolyte materials with novel compositions and proper manufacturing techniques are needed in order to scale-up the cells and make this technology ready for commercialization. In this work, the manufacturing methods of the electrolyte for protonic conducting solid oxide cells and their challenges are described, as part of a joint project of Politecnico Di Torino, Politecnico di Milano, University of California Irvine and SNAM, in the attempt to obtain low thickness electrolytes, along with the description of the imaging and analysis techniques employed.