Deposition is a research area in materials science and engineering that focuses on the process of depositing or laying down a material onto a substrate or surface. This can involve various techniques such as physical vapor deposition (PVD), chemical vapor deposition (CVD), sputtering, and electrodeposition. Deposition is used to create thin films, coatings, and patterns on a wide range of materials for applications in electronics, optics, coatings, and more. Researchers in this area study the fundamentals of deposition processes, develop new deposition techniques, and explore applications in various industries.