stacking one PCB onto another with no gap

Current License: CC BY-SA 3.0

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Nov 7, 2018 at 15:13	comment	added	Sener		I have seen those as board-to-board connection in one of the Datalogic products. But, wire-to-board way makes more sense with such a shallow pin holes. Thank you very much for your reply.
Nov 7, 2018 at 11:08	comment	added	Rocketmagnet		@Sener - These are IDC wire-to-board connecrtors called Micro-Match by TE-Connectivity.
Nov 6, 2018 at 16:19	comment	added	Sener		Would you please tell me manufacturer number of that red board-to-board receptacle connector on your PCB?
Oct 31, 2012 at 21:31	vote	accept	OrCa
Oct 29, 2012 at 21:57	comment	added	Rocketmagnet		They're probably still vulnerable to things like thermal and mechanical stress. You might consider: 1) strengthening the copper around the castellation with a couple of small vias. This helps to rivet the copper down. 2) have all castellations along one edge, and use some flexible glue along the other edge. This should relieve some mechanical stress on the solder joints. However, I should say that I have no long term experience with proper castellations in any kind of rugged environment. Maybe someone else has?
Oct 29, 2012 at 21:52	comment	added	Rocketmagnet		Well, we made castellations the bad way (use vias on the outline of the board). The problem is that, when the board is routed, it tears the plating from the vias. They were very unreliable. A nightmare. It's best to get your PCB manufacturer to make them properly for you. If you can't do that, then expand the board outline so that the vias are left intact, then use a belt sander to sand away half the vias. This reduces stress on them.
Oct 29, 2012 at 21:11	comment	added	OrCa		@Rocketmagnet: Regarding the castellations idea, which seems to be most practical/flexible... Assume around 10 contacts between one PCB and the other. What are your comments on your experience with the assembly and mechanical durability -- i.e., did you find any risk of vibration-case instability as stated by Andrew's answer? Perhaps you could also add a POST-soldering closeup shot of the castellated PCB attachment, if you have one.
Oct 29, 2012 at 14:23	comment	added	Some Hardware Guy		I like that you drilled giant holes in the mother board to accommodate the decoupling caps, that's pretty awesome.
Oct 29, 2012 at 14:10	comment	added	Toby Lawrence		One potential solution to this is that he could solder the raw PCBs together first, then populate and reflow the boards. It doesn't add much in the way of quick mix-and-matching but it would help against having to require components to endure a second reflow cycle.
Oct 29, 2012 at 12:40	history	edited	Rocketmagnet	CC BY-SA 3.0	Added second half.
Oct 29, 2012 at 12:15	history	answered	Rocketmagnet	CC BY-SA 3.0