Introduced here is a plasma polymerization apparatus and process. Example embodiments include a vacuum chamber in a substantially symmetrical shape relative to a central axis. A primary rotation shaft may be operable to rotate about the central axis of the vacuum chamber and a secondary rotation shaft may be operable to rotate about a secondary axis distal to the central axis. The primary and secondary rotation shafts may be mechanically connected, and one or more devices may be secured on a platform that rotates along both shafts. Additionally, reactive species discharge mechanisms positioned around a perimeter of the vacuum chamber may be configured to disperse reactive species into the vacuum chamber. The reactive species may form a uniform polymeric multi-layer coating on the surface of the one or more devices.