Superconducting radio frequency (SRF) cavities are a cornerstone infrastructure of particle accelerators. Current fabrication (bulk niobium) technology is reaching its material intrinsic limits and new materials and structures are needed to both decrease the operation and construction cost while preserving or even improving their performances. The approach described in this task consist in depositing by Atomic Layer Deposition (ALD) superconducting multilayers and adhesion/diffusion barriers on coupons and cavities in order to increase superconducting cavity performances (Quality factor and accelerating gradient).