500 °C operation of AlGaN/GaN and AlInN/GaN Integrated Circuits
2014
High-temperature technology platform has been developed utilizing planar III-nitride heterostructures approach. The record high electron concentration and mobility in 2DEG channel of III-nitride devices result in very high operation speed and are remarkably stable within a broad temperature range, allowing device operation above 500 °C. The developed IC technology is based on three key elements: (1) exceptional quality III-nitride heterostructure with very high carrier concentration and mobility that enables IC fast operation in a broad temperature range; (2) heterostructure field effect transistor approach that provides fully planar IC structure which is easy to scale and to combine with the other high temperature electronic components; (3) robust design with self-compensating 2DEG load resistors, advance metallization and high-k passivation/gate dielectrics, specially developed for high temperature operation. The feasibility of technology was demonstrated by modeling, design and fabrication of inverter ...
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