Home > Press Releases
JST Press Release

9th December 2012
Japan Science and Technology Agency (JST)
5-3, Yonbancho, Chiyoda-ku, Tokyo 102-8666
URL http://www.jst.go.jp/EN/index.html

High-Voltage Vacuum Power Switch for Smart Power Grids

We fabricated vacuum power switches rated at 10kV, building electron emitters (essentially p-i-n diodes) from hydrogen-terminated diamond, whose negative-electron affinity enables it to supply a great deal of current across a strong vacuum when it is turned on. We also calculated that the technology could be scaled up to 100kV or greater, making the approach a promising one to control smart grids.

Researcher Information

JST ALCA (Advanced Low Carbon Technology Research and Development Program) :
“Ultra-high Voltage, High Efficiency, and Compact Vacuum Power Switch”

Journal Information

Published in the scientific journal “IEDM 2012 - 2012 IEEE International Electron Devices Meeting (IEDM) TECHNICAL DIGEST”

D. Takeuchi et al, “A 10kV Vacuum Switch with Negative Electron Affinity of Diamond p-i-n Electron Emitter”, IEDM12, pp.167-170 (7.6.1-7.6.4) (2012)

doi: 10.1109/IEDM.2012.6479000


[About Research]
AIST Public Relations Department
Link to the article: http://www.aist.go.jp/index_en.html

[About Program]
Miyabi HAYAMA, Akitsugu KOGA
Department of Green Innovation, Japan Science and Technology Agency


JST, an integrated organization of science and technology in Japan, establishes an infrastructure for the entire process from the creation of knowledge to the return to the society. For more information, visit http://www.jst.go.jp/EN/