This course is introductory solid state physics for seniors of the physical sciencesIn the years since the first lecture was presented the field has developed vigorouslyand there are notable applicationsThe challenge to the lecture has been to treat significant new areas while maintaining the tntroductory level of the lectureIt would be a lucky to present such a physical field as a homeworkIn this semester we will study five topics which include energy bandseimconductormetalsuperconductorand magnetismIn the first half of the semester most of lecture will be focused on basic concept of energy band based on quantum physicsIn the second half of the semester we will focus on semiconductor and various materials by employing quantum mechanicsThe subjects which have been treated in this semester will be applied to diverse new materials.