d_techID

The database identifier of the technology database.

t_constraintGroupName

The name of the constraint group to create or update.

Valid values: Any unique string

l_layerConstsProps

A list of lists containing the constraints and layer properties. The list has the following syntax:

list ( list( tx_layer g_width g_space
[ n_notch ] g_wireExt g_cap g_resistance
[ g_edgecap ] ) … )

where,

• tx_layer is the routing layer, stored in the named constraint group as follows:
  interconnect( ( validLayers (layer) ) )
  Valid values: The layer name or the layer number

• g_width is the width, in user units, of a horizontal or vertical route segment on the specified layer, stored in the named constraint group as follows:
  spacings( ( minWidth layer value) )
• g_space is the space, in user units, between horizontal or vertical route segments on the specified layer, stored in the named constraint group as follows:
  spacings( ( minSpacing layer value) )
• n_notch is the notch spacing, in user units, allowed for the layer, stored in the named constraint group as follows:
  spacings( ( minSameNetSpacing layer value) )
• g_wireExt is the wire extension, in user units, for the layer, stored in the named constraint group as follows:
  spacings( ( minWireExtension layer value) )
• g_cap is the capacitance for the layer, stored in techLayerProperties as areaCapacitance for the layer.
• g_resistance is the resistance for the layer, stored in techLayerProperties as sheetResistance for the layer.
• g_edgecap is the edge capacitance for the layer, stored in techLayerProperties as edgeCapacitance for the layer.

l_viaDefNames

A list of via definition names. The list has the following syntax:

list ( t_viaDefName … )

where, t_viaDefName is the via definition name, stored in the named constraint group as follows:

interconnect( validVias ( viaDefName ) )

l_vias

A list of lists of via data. The list has the following syntax:

[ list( list( tx_viaLayer1 tx_viaLayer2 n_minSpace g_stack ) … ) ]

where,

• tx_viaLayer1 specifies the bottom routing layer for the via.
  Valid values: The layer name, the layer number
• tx_viaLayer2 specifies the top routing layer for the via.
  Valid values: The layer name, the layer number
• n_minSpace is the minimum spacing, in user units, allowed between via layers.
• g_stack indicates whether you can stack the via layers.
  Valid values: t (can be stacked), nil (cannot be stacked).
  This via data is stored in the named constraint group as follows:
  spacings( ( minSameNetSpacing layer1 layer2 value ) ( stackable layer1 layer2 t | nil ) )

t

The constraint group was created or updated, along with the specified layer properties.

nil

The technology database does not exist.