Reducing Interconnect Delay
How do we reduce interconnect delay?
If wire width is increased
- Rwire reduced, Csub increased, RC sub delay constant.
- C fringe is constant, unaffected by increasing the wire width
Wire delay decreased IF
- C fringe is large compared to Csub
- Fortunately, this is true for sub micron designs.
If load capacitance dominates wire capacitance, then increasing wire width will help because R*Cload delay decreased.