Voltage Dependent Characteristics of 48V AlGaN/GaN High Electron Mobility Transistor Technology on Silicon Carbide

Gallium Nitride based HEMTs are a promising technology for high voltage, high power, high frequency applications. In addition to the potential for high operating voltage, this technology may also be suited for applications that utilize modulation of the drain voltage to improve overall amplifier efficiency. RFMD has developed a GaN HEMT technology platform on semi-insulating SiC substrates. This technology includes a 0.5μm gate process and advanced field plate designs to maximize device performance. We report on devices from this technology, operated over a range of drain bias conditions. Performance and reliability results illustrate the compatibility of this device technology for high voltage and variable voltage applications.