At 90 nm, wires account for nearly 75% of the total delay in a
circuit. Even more insidious, however, is that among nearly 40% of
these nets, more than 50% of their total net capacitance are
attributed to the cross-coupling capacitance between neighboring
signals. At this point a new design and optimization paradigm based
on real wires is required. Nanometer routers must prevent and
correct these effects on-the-fly in order to reach timing closure.
From a manufacturability standpoint, nanometer routers must
explicitly deal with the ever increasing design complexity, and be
capable of adapting to the constraint requirements of timing,
signal integrity, process antenna effect, and new interconnect
architecture such as X-architecture.
In the nanometer era, we must look into new-generation routing
technologies that combine high performance and capacity with the
integration of congestion, timing, SI prevention, and DFM
algorithms as the best means of getting to design closure quickly.
In this book, we present a novel multilevel full-chip router,
namely mSIGMA for SIGnal-integrity and MAnufacturability
optimization. And these routing technologies will ensure faster
time-to-market and time-to-profitability.
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