When you create castellated holes on your multilayer boards‘ edges, you can use them to replicate some parts of your PCB circuit. For example, if you have a circuit including a filter, feedback loops, or an inverter. You can mass-produce these little sub-circuits, test and solder them onto your main PCB, which contains the circuit’s remaining parts where needed.
You can use a castellated PCB as a breakout board for a specific portion of your larger multilayer PCB.
With castellated holes, you can easily change the component’s Pin layout with respect to user requirements.
You can produce integrated modules on one PCB board making use of a castellationthat can be further utilized into a different assembly while production is on.
It is easy to mount PCBs having castellated holes to a second PCB during the final production
Castellated holes are utilized in combining two boards in order to validate and ensure the quality of the solder joint.
They are utilized for small modules i.e. Wi-Fi modules or breakout boards
With castellated holes, the creation of wireless castellated circuit boards to the PCB links becomes easy
1. Why is Aluminium used in circuits