Why Are Low‐Voltage and Low‐Energy Devices Desired?

In the twentieth century, central processing unit (CPU) revealed dramatic advances in device performance and the guideline seemed to be ignored. However, in the 1990s, CPU designers noticed the limitations of CPU cooling efficiency, which triggered an urgent and ongoing discussion of low‐power device technology. Business opportunities based on information technology have increased in the real world without taking account of the issues raised by technologies such as cloud computing and datacenter construction, which have rapidly increased global energy consumption. This chapter talks about viable and innovative ideas on semiconductor device technologies to suppress such global‐warming factors. Information technology has widened perspectives on improving the quality of our future social life. Many companies are creating highly desirable products in the field of sensing technology, such as house monitoring, office monitoring, traffic monitoring, agriculture monitoring, space monitoring, defense monitoring, and so on.