DRC with spike

Comments

• dbsdyhxx

  May 22

  Hello! In my DRC setup, such geometric spikes can be detected and flagged by methods like "width," "with_angle," and "corners." However, during my usage, the "with_angle" method often overlooks certain concave points—for example, it fails to identify indentations when the spike points inward. Could you explain why this happens and whether it is an inherent limitation of the "with_angle" rule? Thank you for your help!
• Matthias

  May 25

  Spikes are not considered "real" by KLayout as they have a zero width. On merge they will be removed as they do not have an area - similar to degenerated polygons such as boxes with no height.

  As merging is implicitly implied by most functions, you will not see these features. But you can turn off implicit merging using "raw":

  layer = input(1, 0)
  spikes = layer.raw.width(1.dbu)
  

  Matthias
• JSS

  May 28

  Hi @Matthias,

  Thank you for your reply.
  It answers my question perfectly.

  Best regards,

  JSS