Abstract:
Traditional reliability tests use complicated equipment, like probe stations and semiconductor parameter analyzers, to measure changes in transistors' threshold voltages,...Show MoreMetadata
Abstract:
Traditional reliability tests use complicated equipment, like probe stations and semiconductor parameter analyzers, to measure changes in transistors' threshold voltages, which are both expensive and time consuming. This paper provides an idea to test the threshold voltage with existing low-to-moderate accuracy ADCs and DACs inside SoCs. To avoid the low-accuracy limitation of measurement results, a new MOS model for the nano-meter MOS transistor drain current is proposed. This model only uses six parameters and is valid for all regimes, being the sub-threshold/weak-inversion, moderate-inversion, strong-inversion and linear regime. Measurement results from 90nm transistors and simulation results from 65nm BSIM4.6 models are used to validate the new model. Finally, an on-chip threshold test for reliability purpose is proposed and long-time stress measurement for 90nm PMOS transistors are shown.
Published in: 2015 20th IEEE European Test Symposium (ETS)
Date of Conference: 25-29 May 2015
Date Added to IEEE Xplore: 02 July 2015
Electronic ISBN:978-1-4799-7603-4