oaMinNotchSpacing

Lets you base the notch spacing on the length of the short side of a notch. It sets the minimum spacing, edge-to-edge, for a single-layer, merged shape when the length of the notch is less than the specified length.

oaMinNotchSpacing Quick Reference

Value Type

oaMinNotchSpacing constraints have a Value that represents the minimum notch spacing, in user units.

set_constraint_parameter -name oaNotchLength -Value f_notchLength 
set_layer_constraint -constraint oaMinNotchSpacing \ 
 -layer s_layer -Value f_notchSpacing 

LAYER s_layer
TYPE ROUTING ; 
 SPACING f_notchSpacing NOTCHLENGTH f_notchLength ;

spacings(
( minNotchSpacing s_layer 'notchLength f_notchLength f_space )
)

Parameters

• oaNotchLength (Value) specifies that the constraint applies only when the length of the short side of a notch is less than this value, in user units.
• betweenConcaveCorners (Value) specifies that the constraint only applies to notches where the shortest notch length is between two concave corners.
• width (Value) is an optional parameter which specifies that the minimum notch length spacing only applies if the width of a single side of the notch is greater than or equal to width.

Examples

Sets the minimum notch spacing to 0.12 for notches having a length less than 0.15, while the minimum spacing is 0.10. See the following figure for examples using this rule.

set_layer_constraint -constraint minSpacing 0.10 -layer Metal1
set_constraint_parameter -name oaNotchLength -Value 0.15 
set_layer_constraint -constraint oaMinNotchSpacing \ 
 -layer Metal1 -Value 0.12 

LAYER Metal1
TYPE ROUTING ; 
 SPACING 0.10 ; #default spacing
 SPACING 0.12 NOTCHLENGTH 0.15 ;

spacings(
( minSpacing Metal1 0.10 ) 
( minNotchSpacing Metal1 'notchLength 0.15 0.12 )
)

Related Topics

Spacing Constraints