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Electrical characteristics of the vertical GaN rectifiers fabricated on bulk GaN wafer
Wang, Y., Xu, H., Alur, S., Sharma, Y., Tong, F., Gartland, P., Issacs-Smith, T., Ahyi, C., Williams, J., Park, M., Wheeler, G., Johnson, M., Allerman, A. A., Hanser, A., Paskova, T., Preble, E. A., Evans, K. R., Wetzel, C., & Khan, A. (2011). Electrical characteristics of the vertical GaN rectifiers fabricated on bulk GaN wafer. In PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8, NO 7-8 WILEY-V C H VERLAG GMBH. https://doi.org/10.1002/pssc.201001158
Vertical Schottky rectifiers were fabricated on two GaN wafers synthesised by hydride vapor phase epitaxy (HVPE) process: n- epilayer on n+ bulk and n- bulk. Full backside ohmic contact and circular Schottky contacts were deposited on the N face and Ga face of the substrate, respectively. The devices showed excellent electrical characteristics. The device fabricated on n-epilayer on n+ bulk substrate showed a breakdown voltage of 348 V, a specific on-state resistance of 4.2 m Omega.cm(2) and a leakage current density of 9.2x10(-6) A/cm(2) at -90 V. The device fabricated on n-bulk substrate showed a breakdown voltage of 600 V, a specific on-state resistance of 1.3 m Omega.cm(2) and a leakage current density of 8.1x10(-8) A/cm(2) at -100 V. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim