题目：Research and Development of Diamond Production for Industrial Us
报告人：山田英明博士
时间：2017年9月26日 下午15：00
地点：动力与机械学院报告厅
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Abstract
Artificial diamond is being a very common material recently such as gem stones as well as mechanical tools. This material has several superior material constants, especially for power device applications. Based on the wider band gap, higher saturation carrier velocity, higher thermal conductivity, and so on than those of Si, SiC, and GaN, diamond has been considered to be the promising candidate material to realize higher performance power devices, which can work even under harsh environment.
In addition, recent industrial interest is in its thermal conductivity, which is the highest in the materials. Also, spintronics applications of diamond is one of the hottest topics of diamond research, where specific defect-centers are expected to realize several kinds of sensors with atomic level resolution even under room temperature.
For realization of above applications, it is indispensable to establish a way to produce diamond wafers with reduced cost and improved quality. From the artificial diamond was firstly shown in '70s, the commercialized size was not been remarkably changed until recently. In this 10 years, some technical breakthroughs were achieved. In this presentation, current status and future prospect of the diamond production is shown, which is followed by above mentioned several potential applications.
About the lecturer
Hideaki Yamada received his Phd dgree from Niigata University at 2002 for work on equilibrium and stability analysis of thermonuclear fusion plasmas.Then, he worked for Kyoto University as a pos-doc until 2004.
The research topic in that period was fundamental study to understand mechanism of plasma etching of organic polymers, which were candidate low-k materials in ICs.
From 2004, he started to work for AIST. The current interest is in efficient techniques to produce inch size diamond wafers, and related plasma chemistry. He received the Prime minister award 2017 for the work on diamond wafer.
