Physics of Thin Films: Advances in Research and Development, Volume 7 is a collection of papers about film growth and structure, optical properties, and semiconducting films. The book covers topics such as diffraction theory; film support and filter fabrication; aging, usage, and cleaning of filters; and properties and applications of III-V compound films. It also discusses topics such as the preparation of use and unbacked metal filters; electromigration in thin films; and the built-up molecular films and their applications. The text is recommended for physicists and engineers involved in thin film physics, especially those who would like to know more about the progresses in the field.