Redundant Line Removal

Redundant Line Removal is a read-write DFM action designed to remove extra lines from a layer to improve the performance of actions.

A line is considered redundant if its deletion will not change the electrical connectivity of the layer. As always, the design is considered with a safety tolerance.

As an example, a line L1 is covered by two other lines: L2 and L3. L1 will be considered redundant only if L2 and L3 overlap by a margin that is larger than the tolerance value. Otherwise, if L1 is deleted, the plotter may shrink L2 and L3 to within the prescribed resolution and a slot may appear between the two lines.

To ensure that a line is covered within the tolerance value, it is enlarged prior to being tested by a margin value (To see a description of the Margin parameter, see Margin in the Parameters section). If the enlarged line is covered adequately by the other lines, it is considered redundant and may be safely removed.

Special Reports

Total of removed lines for each layer is reported.

Result Attributes

Attribute

Description

..._covered_deleted

Number of deleted features added for each layer

covered_deleted

Total of all deleted features in all layers

 

Note: An ellipsis indicates where to insert a layer name, such as in the Result Attributes list.

For example: ...copper_balanced_added indicates that a layer name is required at the beginning of the attribute.