Creating a User-Defined Purpose for WSPs

Multiple WSPs can be assigned to a WSSPDef and multiple WSSPDefs can be on a single layer-purpose pair. If you use WSP Manager to create design WSPs, they are assigned to the track purpose for the layer. If you define WSPs in a technology file or using SKILL functions, you can assign them to a predefined purpose (Cadence recommends using the track purpose) or a user-defined purpose. To define a purpose to be used for WSPs, see To define a purpose for WSPs, you must provide the following in the technology file:.

To define a purpose for WSPs, you must provide the following in the technology file:

• A user-defined purpose for the grid type
  The parent purpose for the user-defined purpose must be "annotation". For example,

  techPurposes(
  ;( PurposeName  #    [abbrev] [parent purpose]     )
    …
   ( type1       30000   RG1    'parent "annotation" )
    …

• Layer-purpose pair using the specified user-defined purpose
  For example,

  techLayerPurposePriorities(
  ;( LayerName    Purpose )
    …
   ( Metal2       type1 )
    …

  Using this example, if Metal2:type1 is specified as the layer-purpose pair for a width spacing snap pattern definition, then the rectangles and polygons on Metal2:type1 identify regions for the definition.
• Display packet and attributes associated with the layer-purpose pair
  For example,

  techDisplays(
  ;( LayerName    Purpose   Packet     Vis   Sel   Con2ChgLy  DrgEnbl  Valid )
    …
   ( Metal2       type1     m2t1       t     t      nil        t        t    )
    …

To display WSPs on the user-defined purpose, you must set the display resource file, as described in Display Resource File.