Reliability and lifetime estimations of GaN-on-GaN vertical pn diodes

Ben Rackauskas*, Michael Uren, Tetsu Kachi, Martin Kuball

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)
315 Downloads (Pure)


This work presents the first lifetime estimation of vertical GaN-on-GaN pn diodes using a step stress measurement technique with analysis not previously applied to GaN. The failure mechanism is surface breakdown, indicating that the lifetime is not yet limited by intrinsic material properties but by device design. As such, the mean time to failure depends on the peripheral length of the device. An estimated operating MTTF of 10 years at a reverse bias stress of 260 V was calculated for a 126 μm diameter diode.

Original languageEnglish
Pages (from-to)48-51
Number of pages4
JournalMicroelectronics Reliability
Early online date6 Mar 2019
Publication statusPublished - Apr 2019

Structured keywords

  • CDTR


  • GaN-on-GaN
  • Lifetime
  • MTTF
  • Reliability
  • Vertical pn diode


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