minWidth

Determines the minimum orthogonal width, in user units, for shapes on a specified layer.

For some processes, the minimum width constraint does not apply for one or more of these cases:

• Where two shapes touch at a point
• Where two shapes abut for a sufficient overlap.

minWidth Quick Reference

Value Type

minWidth constraints have a Value that represents the minimum width, in user units, for any shape on the layer.

Parameters

• distanceMeasureType (IntValue, optional) specifies the spacing measurement method as Euclidean (0, default) or Manhattan (1). For information on this parameter, see “Euclidean and Manhattan Spacing Constraints”.
• exceptLineTouch (DualValueTbl, optional) specifies that minWidth violations caused by two shapes abutting for an overlap distance within the given ranges must be ignored. Each DualValue pair represents a range. Normally, when the overlap distance is less than minWidth, a violation occurs. However, if the overlap distance is greater than or equal to the first value of a DualValue pair and less than or equal to the second value of a DualValue pair, the violation is ignored.
• exceptPointTouch (BoolValue, optional) specifies that minWidth violations caused by two shapes touching at corner points must be ignored.
• oaSpacingDirection (StringAsIntValue, optional) specifies the measurement direction. anyDirection 0 Horizontally and vertically (default) horizontalDirection 1 Horizontally only verticalDirection 2 Vertically only

Examples

Example 1—minWidth Fixed Value

This example sets the minimum width for shapes on Metal1 to 0.3 μm.

set_layer_constraint -constraint minWidth -layer Metal1 -Value 0.3

LAYER Metal1
      WIDTH 0.3 ;

spacings(
   (minWidth "Metal1" 0.3)
        )

Example 2—minWidth with exceptPointTouch and exceptLineTouch

This example sets the minimum width for shapes on Metal1 to 0.3 μm and excludes violations caused by two shapes touching at a point and by two shapes that abut with an overlap of 0.1, or an overlap >= 0.2 and <= 0.3.

set_constraint_parameter -name exceptPointTouch -BoolValue true
set_constraint_parameter -name exceptLineTouch \
  -DualValueTbl {0.1 0.1 0.2 0.3} 
set_layer_constraint -constraint minWidth -layer Metal1 -Value 0.3

spacings(
   (minWidth "Metal1" \
    'exceptPointTouch 'exceptLineTouch (0.1 0.1 0.2 0.3) 0.3 ) 
   ) ;spacings

Related Topics

Length and Width Constraints