Analysis of Correlated Gate and Drain Random Telegraph Noise in Post-Soft Breakdown TiN/HfLaO/SiOx nMOSFETs

We investigate correlated gate (IG) and drain (ID) random telegraph noise phenomena observed in post breakdown regime on nMOSFET TiN/HfLaO/SiOx gate stacks. We observe two different IG-ID correlation patterns (i.e. of the same and opposite polarities) that we attributed to charge trapping into oxygen vacancy traps of different kinds located in the SiOx close to the Si/SiOx interface. Results reported in this letter provide useful information for improving the understanding of IG/ID RTN phenomena and its impact on the reliability of post-SBD nanometer MOSFETs.