July 11-12, 2015
2nd Kyoto University-Inamori Foundation Joint Kyoto Prize Symposium
http://kuip.hq.kyoto-u.ac.jp/en/archives/2015/about/
[Electronics]
Hiroyuki Matsunami
Professor Emeritus, Kyoto University
“Power Semiconductor Devices ‐Key for Effective Use of Electric Energy‐”
Semiconductor devices have become a core of electronics since the invention of transistors in the middle of the 20th century, and they have brought about a big paradigm shift for the world to information society powered by computers and networks. The development of society requires a great deal of energy, and in particular, the consumption of electric energy, which is easy to access, continues to increase with the shift to information society. Given the importance of environmental conservation, simply increasing electric power sources should not be the sufficient solution. Today, society requires people to reduce their use of energy and to use electric energy more efficiently. Specifically, the latter produces a significant impact on reducing energy usage, making it quite important. Power semiconductor devices are essential for the effective use of electric energy, and in recent years their evolution has been the center of great interest.
In my lecture, I will provide an overview of power semiconductor devices and power electronics systems used to convert electric energy, while introducing semiconductor materials used in each. Although silicon (Si) has played a starring role in power semiconductors conventionally, silicon carbide (SiC) has emerged from the standpoint of increasing the efficiency of electric energy usage, and this material is greatly improving the performance. I will introduce practical examples of compact, high efficiency and simple cooling SiC power devices that are used in various electrical and electronic apparatus, home appliances, industrial machines, emergency power supplies, trains, power transmission and distribution systems, and automobiles. Furthermore, gallium nitride (GaN) devices are becoming a target of research and development now. I will introduce the state-of-the-art power devices in an easy manner to understand, and share future prospects of this field including the latest information.
You can find the other lectures on Kyoto University OCW:
https://ocw.kyoto-u.ac.jp/en/opencourse-en/134/video
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