I want two PCB's to be soldered with each other in 90-degrees style.
I think that the base PCB should have a slot with the width equals to the top board thickness. The top board should have a flange with SMD pads. Looks simple:
- How do I calculate the slot width? Let's say the top board is 1.8mm thick with two 70 um copper layers. This will give me the total stack fhickness of 1.94 mm. Is it OK to mill the slot with 2mm cutter?
- Should I make the slot plated or not? Or should I make the slot with "castellated" style edges to allow the solder flow through the slot?
- Is there anything more I should think of doing things like that?
Forget to mention: I need these connections to withstand a lot of Amps. Like 30 or so.
Regarding the forces: I did not think about it. Moreover - I will have a heavy component on the top board (relay). So I can become a problem... Now I think that I could make additional fixtures on the top cover to prevent the top board from bending. However this is not a solution is the board will be soldered with an inclanation.