Determination of Interconnect Structural Parameters for Best-and Worst-Case Delays(<Special Section>Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)

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概要

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• In general, a corner model with best-and worst-case delay conditions is used in static timing analysis (STA). The best-and worst-case delays of a stage are defined as the fastest and slowest delays from a cell input to the next cell input. In this paper, we present a methodology for determining the parameters that yield the best-and worst-case delays when interconnect structural parameters have the minimum and maximum values with process variations. We also present analysis results of our circuit model using the methodology. The min and max conditions for the time constant are found to be (+Δw, +Δt, +Δh) & (-Δw, -Δt, -Δh), respectively. Here, +Δ or -Δ means the max or min corner value of each parameter variation, where w is the width, t is the interconnect thickness, and h is the height. Best and worst conditions for delay time are as follows: 1) given a circuit with an optimum driver, dense interconnects, and small branch capacitance, the best and worst conditions are respectively (-Δw, +Δt, +Δh) & (+Δw, +Δt, -Δh), 2) given driver and/or via resistances that are higher than the interconnect resistance, dense interconnects, and small branch capacitance, they are (-Δw, -Δt, +Δh) & (+Δw, +Δt, -Δh), and 3) for other conditions, they are (+Δw, +Δt, +Δh) & (-Δw, -Δt, -Δh). Moreover, if there must be only one condition each for the best-and worst-case delays, they are (+Δw, +Δt, +Δh) & (-Δw, -Δt, -Δh).

• 社団法人電子情報通信学会の論文
• 2006-04-01

著者

• Fujii Junko

  Starc

• Huang Zhangcai

  Research Center Of Information Production And Systems Waseda University

• KUROKAWA Atsushi

  STARC

• MASUDA Hiroo

  STARC

• INOSHITA Toshinori

  STARC

• KASEBE Akira

  Meitec Corp.

• HUANG Zhangcai

  Waseda University

• INOUE Yasuaki

  Waseda University

• Huang Zhangcai

  Waseda Univ. Kitakyushu‐shi Jpn

• Masuda Hiroo

  Renesas Technology Corp.

• Inoue Yasuaki

  Graduate School Of Ips Waseda University

• Kurokawa Atsushi

  Sanyo Electric Co. Ltd.

• Kurokawa Atsushi

  Sanyo Electric Co. Ltd

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