Specifying Options to Skip Shapes on Selected LPPs

Certain processes require dummy metal fills to meet certain density requirements, but you may want to run simulations for those processes by eliminating the metal fill. To eliminate or skip metal fills based on their fill size, add rules in the Skip all shapes on LPP section of the Simplify layout for EM simulation form.

To add a rule in the Skip all shapes on LPP section:

1. Choose the name of a layer-purpose pair from the Lpp drop-down list.
2. Specify the minimum fill shape size in the Fill Size field.
   For example, if the metal fill consists of 3 micron by 3 micron squares, enter 3 in Fill size.
   
   To skip the complete layer-purpose pair, enter 0 in the Fill size field.
   All shapes that are less than the specified size are skipped while running a simulation.
3. Click Add to add a new rule for the specified layer in the list.
   You can use the Delete Selected, or Clear commands to add delete a rule or to delete all rules from the list.
   
   While eliminating the shapes based on their fill size, the tool does not need to extract the layout. This means that shape simplification is faster than removing dangling shapes, which requires extraction. However, there is an exception for the models with simulator set to Clarity. The layout is always extracted for these models because the tool needs to derive the net names to be shown in Clarity 3D window.

Related Topics

Specifying Shape Simplification Options for IC Layouts

Specifying Options to Change Instance Masters

Specifying Options to Remove Dangling Shapes

Specifying Options to Merge Shapes

Specifying Options to Smooth Shape Steps