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DRC rule to check Density of a circle

Question asked by rachel.spykerman on Jul 22, 2016
Latest reply on Aug 4, 2016 by rachel.spykerman



How would you write a Calibre DRC rule that checks the density of a circle? I've tried the following:


CUP.14_M1 { @ Minimum density of Metal1 area under copper pillar >= 50%

   DENSITY Metal1 < (50/100) INSIDE OF LAYER Pillar RDB CUP.14_M1.rdb



where both Pillar and Metal1 are drawn as circles. However, this will take the bounding box of the layer and this results in incorrect flagging. Any help is appreciated.