This is a homemade PCB. [Kurt Skauen] started with your standard ... Where it gets interesting is his use of through hole plating rivets. We’ve heard of these micro-sized rivets in the past ...
This particular innovation, where a PCB is packed with stepped circular ... it is describing a copper structure that is rather like a rivet. Also, where it says stepped, it means that one end ...
Starting with a naked sheet of FR4 substrate, they drilled out all the holes needed for their PCB layout. Most of these holes were filled with rivets of various sizes, some to accept through-hole ...