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IC Verification & Signoff Design for Manufacturing


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The DFM COPY statement copies layers of the same type and its properties to a new layer. The type of input layer can be changed in the output by DFM COPY keywords.

Node numbers and DFM properties are copied to the output layer when a single input layer is specified and the CLUSTER keyword is not used. Node numbers and DFM properties are not preserved when multiple input layers are specified.
For example, the following command will copy layer A and its properties to P layer:
               P = DFM COPY A

If more than one polygon layer is specified, the output layer is merged and contains copies of all polygons from all input layers. Therefore, this operation:

is equivalent to:
P = (A OR B) OR (C OR D)

This is more flexible than the COPY operation. In addition, the output layer can be a different layer type than the input layer.
The operation can process derived error layers in one of several ways:
  • Convert error clusters into polygons and output a polygon layer.
  • Convert error clusters into individual edges and output an edge layer.
  • Convert error clusters that consist of two edges into a single edge and output an edge layer that is the centerline between the error cluster.
DFM Copy copies DFM properties on the input layer to the output layer for single input layer operation without the CLUSTER keyword.
Please check the following document for more information:

KB Article ID# KB000122007_EN_US



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