minProtrusionNumCut

spacings(
( minProtrusionNumCut tx_cutLayer
 ['cutClass {f_width | (f_width f_length) | t_name}]
 ['distance f_distance] 
 'width f_width
 {'area f_area ['distance f_distance] | 'length f_length 
  'distance f_distance }
 ['distanceWithin f_within]
 ['above | 'below]
 x_numCuts 
)
( minProtrusionNumCut tx_cutLayer
 (f_distance f_length f_width x_numCuts) 
)

) ;spacings

Specifies the minimum number of cuts a via must have when the via is placed on a thin wire (protrusion) directly connected to a wide wire or pin.

Values

tx_cutLayer	The cut layer on which the constraint is applied. Type: String (layer and purpose names) or Integer (layer number)
x_numCuts	The number of via cuts must be greater than or equal to this value.

Parameters

'cutClass {f_width | (f_width f_length) | t_name}
	The cut class to which the constraint applies, specified by width, by width and length, or by name (as defined in a cutClasses constraint). f_width: Width f_length: Length t_name: Name of the cut class
'distance f_distance
	The constraint applies only if the distance of the first via cut (on the protrusion) from the wide wire is less than this value.
'width f_width
	The constraint applies only if the width of the wide wire is greater than this value.
'length f_length
	The constraint applies only if the length of the wide wire is greater than this value.
'area f_area	The constraint applies only if the width of the wide wire is greater than width and the area of the island comprising the wide wire and the protrusion is greater than this value. If width is less than the width of the default routing wire and is specified along with area, the minimum number of cuts required on the routing vias varies based on the area of the routing wire on the layer. If only area and width are specified, only the thin wire connected to a wide wire is checked for the required number of via cuts.
'distanceWithin f_within
	The distance between the via cuts must be less than this value for the via cuts to be counted.
'above | 'below
	The metal layer to which the constraint applies. By default, the constraint applies to wires on the metal layers directly above and below the cut layer. 'above: The constraint applies to the wires on the layer above. 'below: The constraint applies to the wires on the layer below.

Examples

• Example 1: minProtrusionNumCut with width, area, and distanceWithin
• Example 2: minProtrusionNumCut with distance, width, area, length, and distanceWithin
• Example 3: minProtrusionNumCut with distance, length, width

Example 1: minProtrusionNumCut with width, area, and distanceWithin

The minimum number of via cuts required on a protrusion from a wide wire is 2 if the following conditions are met:

• The width of the wide wire is greater than 1.0.
• The area of the island comprising the wide wire and the protrusion is greater than 6.0.
• The distance between via cuts is less than 0.1.
  
  

Example 2: minProtrusionNumCut with distance, width, area, length, and distanceWithin

The minimum number of via cuts required on a protrusion from a wide wire is 2 if all of the following conditions are met:

• The distance of the first via cut (on the protrusion) from the wide wire is less than 0.5.
• The width of the wide wire is greater than 2.0.
• The length of the wide wire is greater than 3.0.

If all of the conditions listed above are met and the distance between via cuts is less than 0.3, the minimum number of via cuts required is also 2.

spacings(

 ( minProtrusionNumCut "cut1" 
  'distance 0.5 
  'width 2.0
  'length 3.0 
  2
 )

 ( minProtrusionNumCut "cut2" 
  'distance 0.5 
  'width 2.0
  'length 3.0 
  'distanceWithin 0.3 
  2
 )
) ;spacings

Example 3: minProtrusionNumCut with distance, length, width

This example shows an alternative way to use the minProtrusionNumCut constraint. The distance, length, and width are 0.1, 0.2, and 04, respectively, and the minimum number of via cuts is 4.

spacings(

 ( minProtrusionNumCut "cut1" 
  (0.1 0.2 0.4 4 )

 )
) ;spacings

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