Present and future of GaN power devices

Daisuke Ueda*, Takeshi Fukuda, Shuichi Nagai, Hiroyuki Sakai, Nobuyuki Otsuka, Tatsuo Morita, Noboru Negoro, Tetsuzo Ueda, Tsuyoshi Tanaka

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

This paper reviews the present status of GaN-based power devices which has started the practical applications. Normally-off characteristics were realized by introducing p-type AlGaN gate structure, where holes are injected into the channel reducing the on-resistance by conductivity modulation. Experimentally fabricated GaN GIT inverter system attained the world-highest conversion efficiency over 99.3% by using bilateral structure. AlGaN/GaN Natural Super Junction was also developed to overcome the trade-off between the blocking voltage and the on-resistance. Further, a fusion of microwave and power devices was developed as Drive-by-Microwave technology. Finally, direct liquid-immersion package technology, where GaN chip are mounted inside the heat-pipe, was demonstrated. The technology contributes to the dramatic reduction of junction temperature, which had been a problem caused by the increased power density of GaN devices.

Original languageEnglish
Title of host publicationCIPS 2014 - 8th International Conference on Integrated Power Electronics Systems, Proceedings
PublisherVDE Verlag GmbH
ISBN (Electronic)9783800735785
StatePublished - 1 Jan 2014
Event8th International Conference on Integrated Power Electronics Systems, CIPS 2014 - Nuremberg, Germany
Duration: 25 Feb 201427 Feb 2014

Publication series

NameCIPS 2014 - 8th International Conference on Integrated Power Electronics Systems, Proceedings

Conference

Conference8th International Conference on Integrated Power Electronics Systems, CIPS 2014
CountryGermany
CityNuremberg
Period25/02/1427/02/14

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  • Cite this

    Ueda, D., Fukuda, T., Nagai, S., Sakai, H., Otsuka, N., Morita, T., Negoro, N., Ueda, T., & Tanaka, T. (2014). Present and future of GaN power devices. In CIPS 2014 - 8th International Conference on Integrated Power Electronics Systems, Proceedings (CIPS 2014 - 8th International Conference on Integrated Power Electronics Systems, Proceedings). VDE Verlag GmbH.