Originally published at: https://www.protoexpress.com/blog/dont-let-annular-rings-drive-you-crazy/
Annular rings are one of the biggest concerns of PCB designers. You know that you may place your via right in the middle of the pad in the design files, but it just does not mean that you will 100 percent avoid tangencies, or even worse, breakouts. Let’s talk about annular rings, shall we?