Appeal No. 2005-2512
Reexamination Control No. 90/006,431
these components. For example, in RailMill PB the display feature is among the
features listed in RailMill PB, which explains that the RailMill product:
· Accurately extracts the power/ground network from the IC layout.
· Simulates the IC design at the transistor level to determine
current flow
throughout the power network.
· Displays the power network layout and overlays electromigration
and
voltage drop information on the display to clearly show where
problems
exist.
· Allows “what-if” analysis to determine corrective actions to
eliminate
problems before fabricating silicon.
RailMill PB at 1. The caption for Figure 3 further explains that the display function is
provided by ChipViewer:
RailMill reads LVS database and
extracts the power
net for analysis. A
power net
simulation engine
and a transistor
simulation engine
determine where
electromigration
and voltage drop
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