This book is a comprehensive guide to understanding the mechanical behavior of specific semiconductors: Elemental Semiconductors: Si, Ge; Binary Semiconductors: SiC, GaAs, GaP, InP;  Ternary Semiconductors: AlGaAs, GaAsP, ZnCdTe . The chapters are arranged in a logical sequence, starting with the basics of semiconductors in Chapter 1 and gradually progressing to more complex topics. Chapter 2 delves into the elastic properties and yielding concept, while Chapter 3 discusses plastic deformation and its relation to semiconductor stability. The important role of defects in semiconductors is explored in Chapter 4, with a focus on point defects and dislocations. Chapter 5 covers static deformation, including hardness and brittle behavior, while Chapter 6 explains the phenomenon of work hardening and its relationship to dislocations in the material. Chapter 7 introduces time-dependent deformation, specifically creep, which is influenced by temperature. Fracture, a common mode of failure in semiconductors, is discussed in Chapter 8, with an emphasis on stress rupture and the inability to carry an applied load. Chapter 9 addresses the unique mechanical behavior of small size semiconductor specimens in the nano scale. Finally, Chapter 10 explores the environmental effects on the mechanical properties of semiconductors.   Overall, this book provides a comprehensive and detailed understanding of the mechanical behavior of some elemental, binary and ternary semiconductors, which is crucial for developing and designing semiconductor-based technologies.