I'm making a heat sink footprint for TO220 in Altium. I think route tracks under the heat sink is not a good idea. So I want to give the footprint a keep-out, but the keep-out region on Keep-Out layer applied to both top and bottom layer, though my heat sink sits on the top layer. So any methods to add a keep-out region only applied to the layer where the footprint sit on?


Create a region on top layer and check the Keepout checkbox:


The traces on other layers are not affected:

enter image description here

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  • \$\begingroup\$ Does this method actually add the copper that is shown above? \$\endgroup\$ – Tom Brendlinger Aug 3 '16 at 13:17
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    \$\begingroup\$ @TomBrendlinger No, it does not. \$\endgroup\$ – Armandas Aug 3 '16 at 22:09

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