minEndOfLinePerpSpacing

Specifies the minimum distance required between an end-of-line and a perpendicular edge. Typically, minEndOfLinePerpSpacing is slightly larger than minSpacing on the layer.

minEndOfLinePerpSpacing Quick Reference

Value Type

The minEndOfLinePerpSpacing constraint has a Value that represents the required minimum distance, in user units, between an end-of-line wire and unobstructed edges that are perpendicular to it.

set_constraint_parameter -name width -Value eolwidth
set_constraint_parameter -name endOfLinePerpWidth -Value perWidth
set_layer_constraint -constraint minEndOfLinePerpSpacing \
  -layer Metal1 -Value eolSpace

PROPERTY LEF58_SPACING
"SPACING eolSpace EOLPERPENDICULAR eolwidth perWidth ;"

Parameters

The following parameters are required:

• width (Value) is the width, in user units, of the end-of-line (eolWidth).
• endOfLinePerpWidth (Value) is the length, in user units, of the perpendicular edge (perWidth).

The constraint is triggered when the width of an end-of-line is less than width, and an edge that is perpendicular to the end-of-line is less than or equal to endOfLinePerpWidth in length. The perpendicular edge must also be within sight of the end-of-line, such that an unobstructed line can be drawn from the end-of-line to the perpendicular edge, not including the endpoints of either edge.

Examples

The following example requires a minimum spacing of 0.12 user units between an end-of-line of width less than 0.11 user units and a perpendicular edge that is less than or equal to 0.18 user units in length. In addition, a minimum spacing of 0.11 is set for shapes on the layer.

set_constraint_parameter -name width -Value 0.11
set_constraint_parameter -name endOfLinePerpWidth -Value 0.18
set_layer_constraint -constraint minEndOfLinePerpSpacing \
  -layer Metal1 -Value 0.12

PROPERTY LEF58_SPACING
"SPACING 0.12 EOLPERPENDICULAR 0.11 0.18 ;"

The following figures show how the constraint is interpreted in this example.

Related Topics

Spacing Constraints

minEndOfLineExtensionSpacing

minEndOfLineSpacing