Abstract
In this article, for the first time, a variation of lateral doping (VLD) technique was proposed to improve blocking voltage and ON-resistance properties in the lateral β-Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> metal-oxide-semiconductor field-effect transistor (MOSFET). Enhancement-mode operation was achieved in the VLD transistor. The maximum transconductance of this new device is more than three times as large as the uniformly doped (UD) transistor. Moreover, the OFF-state electric field at the channel was suppressed compared to the UD transistor, resulting in higher blocking voltage. We also investigated the optimal device properties with changing channel concentration in the drift region of VLD transistor. A power figure of merit of 332.7 MW/cm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> was reached by VLD design. Thus, this proposed structure provides a new design strategy for high-power β-Ga <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> MOSFETs.
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