Abstract
We report on reliability testing of vertical GaN (v-GaN) devices under continuous switching conditions of 500, 750, and 1000 V. Using a modified double-pulse test circuit, we evaluate 1200 V-rated v-GaN PiN diodes fabricated by Avogy. Forward current-voltage characteristics do not change over the stress period. Under the reverse bias, the devices exhibit an initial rise in leakage current, followed by a slower rate of increase with further stress. The leakage recovers after a day’s relaxation which suggests that trapping of carriers in deep states is responsible. Overall, we found the devices to be robust over the range of conditions tested.
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Acknowledgments
The authors thank I. Kizilyalli and O. Aktas, both formerly of Avogy Inc., for providing the diodes studied in this work. The characterization work at Sandia was supported by the Energy Storage Program managed by Dr. Imre Gyuk of the DOE Office of Electricity, and the fabrication work at Avogy was supported by the SWITCHES program managed by Dr. Tim Heidel of ARPA-E. Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia (NTESS) LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-NA0003525. The opinions expressed in this paper are solely those of the authors and do not represent the views or recommendations of NTESS.
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The supplementary material for this article can be found at https://doi.org/10.1557/mrc.2018.204.
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Slobodyan, O., Smith, T., Flicker, J. et al. at]Hard-switching reliability studies of 1200 V vertical GaN PiN diodes. MRS Communications 8, 1413–1417 (2018). https://doi.org/10.1557/mrc.2018.204
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DOI: https://doi.org/10.1557/mrc.2018.204