Abstract
In this letter, a macromodel for normally-off (enhancement mode) AlGaN/GaN-based FinFET (2-DEG channel at top with two MOS like sidewall channels) is proposed. AlGaN/GaN-based FinFET devices have improved gate control on the channel due to additional sidewall gates compared with planar structures, but device characteristics exhibit strong nonlinear dependence on fin-width. The proposed model captures both 2-DEG and sidewall channel conduction as well as the fin-width dependency on device characteristics. Model shows excellent agreement with state-of-the-art experimental data.
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