![Plated Through Holes | Non-Plated Through Holes | Printed Circuit Boards | PCB Assembly | PCB Unlimited Plated Through Holes | Non-Plated Through Holes | Printed Circuit Boards | PCB Assembly | PCB Unlimited](https://www.pcbunlimited.com/assets/pu/engineering/plated-1-1bae84faa87152317631f2a96136001ac871fa40ed78f1427860ff44f27f70e5.png)
Plated Through Holes | Non-Plated Through Holes | Printed Circuit Boards | PCB Assembly | PCB Unlimited
![pcb design - Why do some PCBs have these circular rings? Are they plated through hole vias? - Electrical Engineering Stack Exchange pcb design - Why do some PCBs have these circular rings? Are they plated through hole vias? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/qLNFI.jpg)
pcb design - Why do some PCBs have these circular rings? Are they plated through hole vias? - Electrical Engineering Stack Exchange
![Four types of via: a non-plated through hole, a blind hole plated, a... | Download Scientific Diagram Four types of via: a non-plated through hole, a blind hole plated, a... | Download Scientific Diagram](https://www.researchgate.net/publication/317843301/figure/fig1/AS:508594137567232@1498269699192/Four-types-of-via-a-non-plated-through-hole-a-blind-hole-plated-a-buried-hole-and-a.png)
Four types of via: a non-plated through hole, a blind hole plated, a... | Download Scientific Diagram
![Plated Through Holes | Non-Plated Through Holes | Printed Circuit Boards | PCB Assembly | PCB Unlimited Plated Through Holes | Non-Plated Through Holes | Printed Circuit Boards | PCB Assembly | PCB Unlimited](https://www.pcbunlimited.com/assets/pu/engineering/plated-3-c3f95483c2f3dc32dd913a81b7813c543382c3ba7edc31177922d97002d0e6ff.png)