Physical mechanism of buffer-related lag and current collapse in GaN-based FETs and their reduction by introducing a field plate

Atsushi Nakajima, Keiichi Itagaki, Kazushige Horio

研究成果: Conference contribution

7 引用 (Scopus)

抜粋

Two-dimensional transient analysis of field-plate AlGaN/GaN HEMTs and GaN MESFETs is performed, considering a deep donor and a deep acceptor in the semi-insulating GaN buffer layer. Quasi-pulsed I-V curves are derived from the transient characteristics. It is studied how the existence of a field plate affects buffer-related drain lag, gate lag and current collapse. It is shown that in both FETs, the drain lag is reduced by introducing a field plate, because electron injection into the buffer layer is weakened by it, and trapping effects are reduced. It is also shown that the buffer-related current collapse and gate lag are reduced in the field-plate structures. The dependence on SiN passivation layer thickness under the field plate is also studied, suggesting that there is an optimum thickness of the SiN layer to minimize buffer-related current collapse and drain lag in GaN HEMTs and MESFETs.

元の言語English
ホスト出版物のタイトル2009 IEEE International Reliability Physics Symposium, IRPS 2009
ページ722-726
ページ数5
DOI
出版物ステータスPublished - 2009 11 12
イベント2009 IEEE International Reliability Physics Symposium, IRPS 2009 - Montreal, QC, Canada
継続期間: 2009 4 262009 4 30

出版物シリーズ

名前IEEE International Reliability Physics Symposium Proceedings
ISSN(印刷物)1541-7026

Conference

Conference2009 IEEE International Reliability Physics Symposium, IRPS 2009
Canada
Montreal, QC
期間09/4/2609/4/30

    フィンガープリント

ASJC Scopus subject areas

  • Engineering(all)

これを引用

Nakajima, A., Itagaki, K., & Horio, K. (2009). Physical mechanism of buffer-related lag and current collapse in GaN-based FETs and their reduction by introducing a field plate. : 2009 IEEE International Reliability Physics Symposium, IRPS 2009 (pp. 722-726). [5173337] (IEEE International Reliability Physics Symposium Proceedings). https://doi.org/10.1109/IRPS.2009.5173337