Oxide and Friends
Unshrouding Turin (or Benvenuto a Torino)
It used to be just those super high speed lanes like PCIe and, you know, 100 gig Ethernet and stuff like that had to be back drilled. But now you're doing like thousands of these things. And it turns out back drilling a via is really hard. So what they do is they take and remove that stub that's left over by shoving a bigger drill bit in from the other side.
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