Semiconductor-based devices with increased reliability, low cost, unusual lightness, small size, and reduced service personnel are everywhere around us and became an important part of our daily life. It is difficult to imagine life without electronic vehicles, TVs, computers, smartphones, medical network, global e-commerce etc. Semiconductors are the main "driving force" of the economic strength, national security, resilience in times of crisis etc. However, scaling with existing semiconductors cannot go on forever. The majority of projects for today’s electronics development is waiting for new semiconductors, suitable for their realization. Having the right properties, among them tolerance to radiation, InAs-InP solid solutions are of crucial importance as materials for cutting-edge electronic technologies. Packed with diagrams nine chapters and 2 attachments of this book provide excellent coverage of an useful information on producing of single bulk crystals and layers and the basic properties and application of InAs1-xPx for specialists practicing with semiconductors.