Creating a solderable board

Hello everyone!

I would like to design and manufacture a tiny board that can be solderable. I’m thinking in something similar to HC-05 and ESP boards that have an outline with what seems to be cut connector holes.

I was wondering what is the proper way to achieve something similar to that. Any ideas?

you may have a look at here

and a kicad project with these connectors



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So it seems this is called castellation and it is done by placing connectors that are later milled. I didn’t expect this because I imagined that the routing would rip the copper out of the PCB.

I will ask if this could be done by the people I usually order PCBs to.

Thanks @maui for your fast and complete answer. I am sorry I did not find the post you linked.
Thanks also everyone for the awesome KiCad software!