Thin film science and technology plays an important role in the high-tech industries. The production of thin films for device purposes has been developed over the past 40 years. Thin films as a two-dimensional system are of great importance to many real-world problems. Their material costs are very small as compared to the corresponding bulk material and they perform the same function when it comes to surface processes. Thus, knowledge and determination of the nature, functions and new properties of thin films can be used for the development of new technologies for future applications. Some of the important applications of thin films are microelectronics, communications, optical electronics, catalysis, coating of all kinds, and energy generation and conservation strategies. This book emphasizes the importance of thin films in new technologies. It presents basic concepts, techniques, materials, processing and applications of thin films. As thin film physics and technology is a multidisciplinary filed, the book will be useful to a wide variety of readers (especially young researchers) in physics, electronic engineering, materials science and metallurgy.