Much like my debates on which items to keep or give up during spring cleaning, deciding whether these nonfunctional pads should be kept or removed during manufacturing is an ongoing controversy in the PCB design community. Although they typically appear on exposed board layers, these annular rings can also be placed in the interior layers along the neck of a via and form nonfunctional pads, similar to ELIC design. Dusty old circuits and boards that I’ve kept around, an old computer I haven’t gotten around to cleaning off that I made some of my first CAD designs on - the life of a hoarding engineer.Īnnular rings in PCBs form a joint between a trace and the via its connects to. The stuff I keep always has some kind of sentimental value, or it’s something that I think I’ll need later. I have so much old stuff in my garage, and I can never decide what to get rid of and what to keep.
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