Test Jig, good for large quantity of PCBs. It’s fast but expensive, that is why large quantity could off set the cost.

Through hole drill.

Thick PCB copper layer for high current application.

Using X-Ray to locate copper sheet covered PCB

Test Jig

Etched PCB ready for electroplating.

This factory makes large size PCBs

Electroplating bath

Here they figure out the solution for electroplating