DRC errors from Altium gang mask

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   Hello,

I created a footprint for a 0.4mm pitch SON device (SON11P40_200X250X80L35X20T140X120N) for Altium Designer.  Because the pitch between pads was so small, PCBExpert generated a gang mask over the pads.  Apparently the software uses multiple overlapping objects to create the gang mask.  It looks like the masks are overlapping properly, but for some reason Altium generates DRC failures.  I have a solder mask sliver rule limit of 3 mils in the Altium design rules.  

Am I doing something wrong?  Do you have a suggested workaround?

Tom Yunghans
3526 Glen Ave
Carlsbad, CA  92010
(714) 336-9503  uploads/16542/solder_mask_sliver_errors_from_gang_mask.jpg

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thomas.yunghans Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 02 Nov 2021 Status: Offline Points: 28	Post Options Post Reply Quote thomas.yunghans Report Post Thanks(0) Quote Reply Topic: DRC errors from Altium gang mask Posted: 7 hours 35 minutes ago at 9:17pm
	Hello, I created a footprint for a 0.4mm pitch SON device (SON11P40_200X250X80L35X20T140X120N) for Altium Designer. Because the pitch between pads was so small, PCBExpert generated a gang mask over the pads. Apparently the software uses multiple overlapping objects to create the gang mask. It looks like the masks are overlapping properly, but for some reason Altium generates DRC failures. I have a solder mask sliver rule limit of 3 mils in the Altium design rules. Am I doing something wrong? Do you have a suggested workaround? Tom Yunghans 3526 Glen Ave Carlsbad, CA 92010 (714) 336-9503 uploads/16542/solder_mask_sliver_errors_from_gang_mask.jpg