The major objective of this article is to know about Thin Film Deposition. Thin Film Deposition is a vacuity technology for applying coatings of pure resources to the outside of different substance. The coatings, also called films, are typically in the width variety of angstroms to microns and can be a only substance, or can be numerous resources in a covered structure. This paper discusses the basic principles of width and speed control by use of quartz crystal monitoring.