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GND polygon not connected to board GND net. How to detect?

danielone , 10-13-2017, 07:01 AM
Hi all,

One of my biggest faults with AD is that sometimes, as you see in the photo, a GND polygon is not connected to board GND because this polygon is enclosed in other tracks / other net polygons etc. So the only option here is to place a via to connect to bottom GND plane.

In the photo C2 GND is connected to a polygon that remains unconnected to board GND.

This kind of fault remains undetected.

How to detect when a polygon is insulated from board GND net? Is it possible to create a specific rule?

Many thanks!!

robertferanec , 10-13-2017, 12:51 PM
If you have not intentionally created this polygon (polygon enclosed by tracks), what you may want to do is to double click on the polygon and check "Remove Dead Copper". That may help.

However, the C2 pin, that should be detected by Altium as unconnected net. Be sure you have "Un-Routed Net" checked (Go to PCB: Tools -> Design Rule Check -> Rules to Check -> Electrical -> Un-Routed Net, then press Run Design Rule Check button )
danielone , 10-13-2017, 05:43 PM
And it worked! Many thanks Robert.
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