Abstract
The integration density of state-of-the-art electronic systems is limited by the reliability of the manufactured integrated circuits at a desired circuit density. Design rules, operating voltages, frequencies, and temperatures are precisely chosen to ensure correct product functional operation over its intended lifetime. Thus, in order to obtain the overall performance and functionality bounded by various design and manufacturing constraints, the integrated circuit reliability must be modeled and analyzed at the very beginning of design stages. This paper reviews some of the most important intrinsic wearout mechanisms of MOSFETs (including hot-carrier injection, time-dependent dielectric breakdown, and negative bias temperature instability) and introduces new accelerated-lifetime and SPICE compact models of these wearout mechanisms. Based on these circuit-aging models, a new SPICE reliability simulation approach is proposed and demonstrated with a simplified SRAM design on a commercial 90-nm technology to help designers understand device-failure behaviors, predict circuit reliability, and improve product robustness.
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