can someone suggest how to expose copper on bottom layer (bottom gnd layer).
You expose copper on either side by placing a Solder Mask shape object to the side you need it.
The shape is a negative, in other words, where Solder Mask will not be.
I am using Altium for pcb Design and if i place shape in solder mask on bottom layer ,it overlap with supply via, signal via.is any other way to do this.
As this is a Mentor software site, I cannot be sure how it is done in Altium.
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