The 40th International Symposium on Dry Process (DPS2018) will be held at Toyoda Auditorium (Toyoda Kodo), Higashiyama Campus, Nagoya University, Nagoya, Aichi in Japan from November 13 to 15, 2018. The Symposium covers all aspects of the rapidly evolving fields of dry processes, including but not limited to plasma etching and deposition processes, diagnostics and modeling of plasmas and surfaces, and surface modifications by plasmas, for the applications in, e.g., microelectronics, power devices, sensors, environmental protection, biological systems, and medicine. The DPS has provided valuable forums for in-depth discussion among professionals and students working in this exciting field for more than three decades.