Thin films are key components of modern technology. Ranging from a few nanometers to several micrometers in thickness and composed of a wide variety of materials, they play a crucial role in numerous applications. Their unique properties, related to the exciting physical phenomena that emerge in many materials when dimensions are reduced, make them a subject of intense research across various fields. This volume brings together contributions from experts in materials science and engineering, serving as a valuable resource for scientists, engineers, and students seeking to expand their knowledge of thin film fabrication and its practical applications. It is intended to serve as a helpful reference for both students and professionals seeking clear and detailed information on the fundamentals, technologies, and applications of thin films.