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Subject: Limit distance from line to antipad from Autoroute?
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Lordman
Posts: 1
Online: User is Offline
5/12/2008 10:13 PM  
Hi,

I am trying autoroute the first time and pretty new to Allegro. The cline generated by autoroute are all touching the antipad. Is there a simple way to adjust, say, the line have to be at least 8 mil away from the antipad or in some case, mid point between two antipad?

I know that it is possible to set constrain area and defind them at individual area but are there a more general setting? Using 15.1.

Thanks.
BillZ_EMA
Posts: 51
Online: User is Offline
5/13/2008 5:01 AM  
Hi,
There is no setting for cline to antipad. clearances are copper to copper. You can try to adjust your cline to pad clearance or
reduce the size of the antipad. I would check with my fab house before just reducing the size. There is a setting in the gloss commands in the autorouter to center lines.
In version 16.0 Allegro XL there is a check for trace over void which checks for this type of thing.
Unless this is a high speed impedance controlled board some trace over hang shouldn't be a problem.
Here is another post on this same subject. http://www.cdnusers.org/Forums/tabid/52/forumid/5/postid/8004/view/topic/Default.aspx

Regards,
BillZ
EMA Design Automation
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Forums > Silicon-package-board > PCB Design > Limit distance from line to antipad from Autoroute?


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