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Monolithic integration of a half bridge on the same GaN-on-Si wafer is very challenging because the devices share a common conductive Si substrate. In this letter, we propose to use GaN-on-SOI (silicon-on-insulator) to isolate the devices by trench etching through the GaN/Si(111) layers and stopping in the SiO2 buried layer. By well-controlled epitaxy and device fabrication, high-performance 200 V...
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