Vacuum deposition is a process used to deposit thin films of material onto a substrate. It is a type of physical vapor deposition (PVD) process, in which a material is vaporized in a vacuum environment and then deposited onto a substrate. The process is used to create thin films of various materials, such as metals, alloys, semiconductors, and insulators. Vacuum deposition is used in a variety of industries, including electronics, optics, aerospace, and automotive.