One of the goals of the actual semiconductor detector research is to find and develop other materials which overcome the limits of the present semiconductors. In this respect the so-called wide-band gap semiconductors, among which silicon carbide is one of the most promising examples, are the best candidates. Their advantages with respect to traditional semiconductors, namely silicon and germanium, are discussed. This book examines certain aspects of the interaction of radiation with semiconductors, as well as the basic properties of semiconductor detectors.