Extraction: Resistance

Using this feature the resistance of a single arbitrary shape can be extracted. Four steps are required to do this:

Usage:

• Open extraction tools (Utilities/Misc/Electrical Extraction)
• Choose a polygon with the the resistance shape tool
• Choose an input edge/port
• Choose an output edge/port
• Enter material data in the dock windows

The resulting resistance will be displayed. The electrical field density is also shown.

Algorithm

The finite differences method is used to calculate electrical resistance. It is a two-dimensional calculation process. With three-dimensional parameters only the layer thickness from the LayerManager is used to calculate the square resistance from the specific resistance of the material. Any other 3-D geometry is not considered in the calculation. Any calculated resistances are for direct current only. No skin effects or other factors are considered.

Example