The course is to reveal and study the micro mechanism of semiconductor and explain the macroscopic physical phenomena that occur in semiconductors from a microscopic point of view; to study the electronic state and motion law in semiconductors; to study the statistical distribution, transport theory and related laws of carriers in semiconductors; to learn some macroscopic physical phenomena that occur in the transport of carriers; and to learn some basic structures of semiconductors, including metal semiconductor junctions and surface problems. This course is to let students to master the nature and preparation methods of the main semiconductor materials, understand the latest development of semiconductor materials, and lay a foundation for the work of semiconductor material science in the future.