The super-lattice power amplifier with diamond enhanced superjunctions (SPADES) is a device that incorporates nanocrystalline diamond superjunctions into the super-lattice castellated field effect transistor (SLCFET), to improve breakdown voltage. A diamond superjunction is formed with p-type nanocrystalline diamond to balance mutual depletion between the two-dimensional electron gas superlattices and the doped diamond in order to reduce the peak electric field in the drain access region. Formation of the diamond superjunction presents several challenges, such as managing diamond conformality, strain, and control over p-type doping. Optimization of diamond growth led to conformal films, with low stress, and linear dependence hole concentration from p-type doping, suitable for the SPADES device.
Naval Research Laboratory
Formation of Diamond Superjunctions to Enable GaN-Based Super-Lattice Power Amplifiers with Diamond Enhanced Superjunctions (SPADES)Geoffrey Foster, ASEE Postdoctoral Fellow Residing at NRLTatyana Feygelson, Naval Research LaboratoryJames Gallagher, ASEE Postdoctoral Fellow Residing at NRLJosephine Chang, Northrop GrummanShamima Afroz, Northrop GrummanKen Nagamatsu, Northrop GrummanRobert Howell, Northrop GrummanKarl Hobart, U.S. Naval Research LaboratoryFritz Kub, Naval Research LaboratoryAndrew Koehler, U.S. Naval Research LaboratoryDownload Paper
5.3 Influence of Substrate Removal on the Electrothermal Characteristics of AlGaN/GaN Membrane High Electron Mobility TransistorsMarko Tadjer, Naval Research LaboratoryPeter Raad, TMX Scientific and Southern Methodist UniversityTatyana Feygelson, Naval Research LaboratoryAndrew Koehler, Naval Research LaboratoryTravis Anderson, Naval Research LaboratoryBradford Pate, Naval Research LaboratoryKarl Hobart, Naval Research LaboratoryFritz Kub, Naval Research Laboratory
10b.4 Reliability Assessment of Thermally-Stable Gate Materials for AlGaN/GaN HEMTsDavid Shahin, University of MarylandTravis Anderson, Naval Research LaboratoryJordan Greenlee, NRC Postdoctoral Fellow Residing at the Naval Research LaboratoryAndrew Koehler, Naval Research LaboratoryVirginia Wheeler, U.S. Naval Research LaboratoryMarko Tadjer, Naval Research LaboratoryTatyana Feygelson, Naval Research LaboratoryBradford Pate, Naval Research LaboratoryJennifer Hite, U.S. Naval Research LaboratoryKarl Hobart, Naval Research LaboratoryCharles Eddy, US Naval Research LaboratoryJr., Naval Research LaboratoryFrancis Kub, U.S. Naval Research LaboratoryAris Christou, University of Maryland-College Park