New perspective on lifetime prediction approach for BTI and HCI stressed device and its impact on circuit lifetime

Abstract

Device and circuit lifetime is investigated for poly silicon gated MOSFET. New findings are: (1) More than 1 order lifetime is increased by quantifying the influence of poly depletion effect (PDE) and accumulated trap charge effect (ATCE). (2) We demonstrate that conventional lifetime model produce an incorrect and reverse lifetime result for each degradation data measured by fast and slow method. (3) We evaluate the impact on circuit parameter, propagation delay time (tPD), degradation in the light of new findings.