maxExtension

Specifies the maximum distance a shape on one layer can extend past a shape on a second layer.

maxExtension Quick Reference

Constraint Type	Layer pair
Value Types	Value, OneDTblValue
Database Types	Design, Technology
Scope	design, foundry
Category	Extension

Value Types

maxExtension constraints have the following value types:

• Value
  Specifies the maximum extension for a shape on one layer past a shape on another layer.
• OneDTblValue
  The lookup key for the table is the width of the shape on the second layer and the table value is the extension of the shape on the second layer past the shape on the first layer.
  
  

Examples

• Fixed Value
  Sets the maximum extension for Metal2 past Metal1 to 1.3.
  

  Format	Example
  Tcl	set_layerpair_constraint -constraint maxExtension \ -layer1 Metal1 -layer2 Metal2 -Value 1.3

• 1D Table: Index width
  Sets maximum extension for Metal2 past Metal1, based on the width of Metal2.
  

  Format	Example
  Tcl	set_layerpair_constraint -constraint maxExtension \ -layer1 Metal1 -layer2 Metal2 -row_name width \ -OneDTblValue {0.6 0.4 0.8 0.7}

Related Topics

Extension Constraints

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