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A multilevel parasitic interconnect capacitance modeling and extraction for reliable VLSI on-chip clock delay evaluation

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1 Author(s)
Lee, M. ; Digital Compression Products, Texas Instrum. Inc., Dallas, TX, USA

This paper describes fringing and coupling interconnect capacitance models which include the nonlinear second-order effects of field interactions among multilevel parasitic interconnects for accurate circuit simulations. They are fitted well with numerical solutions by using a Poisson equation solver. A reliable parasitic distributed resistance-inductance-capacitance (RLC) extraction method is identified by using the solver with the bounded local three-dimensional (3-D) numerical analysis to reduce excessive central processing unit (CPU) time compared to full 3-D numerical simulation. We investigate the impact of input slew variations on the traversal clock delay within the slow ramp region of the driver gate as well as in the extracted parasitic interconnect networks. Input slew is found to be a dominant factor affecting clock delay sensitivity. In addition, we use indirect on-chip electron beam probing to confirm that the simulated clock delays are in reasonable agreement with the measured delays

Published in:

Solid-State Circuits, IEEE Journal of  (Volume:33 ,  Issue: 4 )

Date of Publication:

Apr 1998

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