Routing Area Ratio

Component providers can guide their products’ signal connection specification as topology style, impedance or delay time control.

For those specifications, the board designer can control or follow those rules as micro-strip or strip line.

This item reports for trace length ratio and routing area on each layer.
  • Item: Input item name.
  • Net: Select High Speed Signal Net Group
  • Layer: Define a target Layer (In a report, it will be shown as a ratio of each layer.)
  • Routing Area: Routing area ratio for every layer.
  • Routing Ratio (%): Define required routing ratio value.

    Ratio = routing length of selected layers/total routing length

  • You can check inner routing ratio or outer routing ratio using this option.
  • Type: Select the routing area check criteria.
    • Max: Check if routing ratio of specific net is smaller than specific value.
    • Min: Check if routing ratio of specific net is greater than specific value.
  • Pin Escape: Enter a radius of circular region around pins to be excluded for the rule check.

In high speed signal routing, it is desirable to route inner layer and to route a net on one layer without use of via. In multi-layer cases, it is best to route on a layer between power and ground layers. This is good to reduce noise and helps make high speed transmission possible. How much high-speed signals are routed in a certain layer is very important in signal integrity.