Affiliations: STMicroelectronics Design Department 850 rue J.
Monnet, 38926, Crolles, France | LIRMM, UMR CNRS/Université de Montpellier II,
(C5506), 161 rue Ada, 34392, Montpellier, France
Abstract: The increase of within-die variations and the design margin growth
are creating a need for statistical design methodologies. This paper proposes a
simple statistical timing analysis method considering the lot to lot process
shifts that occur during production. This method is validated for 90~nm and
65~nm process. Finally, this statistical timing analysis is applied to
evaluate, on basic ring oscillators and combinational paths, the timing margins
introduced at the design level by the traditional corner based approach.