Acid Traps are generated when a gap from pad to trace is too small. They can be avoided by increasing the gap or moving the trace so that it exits the pad lower down the pad. Or you can use a gloss command to add a fillet from the pad exit.
Thanks Steve ,
Could you please show any example & how to use Gloss command allegro designL 16 ver supports this?
Screenshot attached. I'm afraid you'll need Allegro Performance and above to do this with Gloss.
What's the problem from these acid traps? Can it be changed the signal shape? I also faced same problem. Please help.
During cleaning of board chemicals may deposite there. thats why we have to route straight to minimize the probability.