minSameMetalSharedEdgeViaSpacing

Specifies the spacing between two via cuts that have a common projection between them and have neighbor wire(s) within parWithin distance from them on the same edge. This spacing must be greater than or equal to oaMinViaSpacing.

minSameMetalSharedEdgeViaSpacing Quick Reference

Value Type

minSameMetalSharedEdgeViaSpacing constraints have a Value that represents the required spacing.

Parameters

• parallelEdgeWithin (Value) specifies the parWithin distance.
• aboveOnly (BoolValue, optional) The constraint applies only if the via cuts have a common above metal routing layer.
• cutClass (DualValue, optional) The constraint applies only to the cut class of the given dimensions.
• exceptSameViaCount (IntValue, optional) The constraint does not apply if there are greater than or equal to this number of cuts having common same metal on both the above and below layers.
• exceptTwoEdges (BoolValue, optional) The constraint does not apply if the cuts have two neighbor wires within parWithin distance on opposite sides.

Examples

set_constraint_parameter -name parallelEdgeWithin -Value 0.12
set_constraint_parameter -name exceptTwoEdges -BoolValue true 
set_constraint_parameter -name exceptSameVia -IntValue 3 
set_layer_constraint -constraint minSameMetalSharedEdgeViaSpacing \
  -layer V2 -hardness hard -Value 0.1 

PROPERTY LEF58_SPACING
" SPACING 0.1 SAMEMETALSHAREDEDGE 0.12 EXCEPTTWOEDGES 
    EXCEPTSAMEVIA 3;" ;

Related Topics

Via Construction Constraints