I need my pads for connectors to be plated so that the pins from the connectors can be soldered. But the bottom side cannot have copper pad/annular ring. I have made the pads as shown in the figure below. Bottom pad size is same as the hole size and the hole is Plated.
Is this the proper way? Will there be risk that the holes will be unplated my the manufacturer?
Best Answer
Well as comments have said only your fab house can tell you for sure. You should try to keep a close relationship with them as they're basically your partner in all your designs :)
Now this question just happened to come up for me as well a few months ago on a really dense board. I use Via Systems when in the US, a very large and capable manufacturer. I asked them a similar question, could I make vias that only had an annular ring on one layer. Their reply was no don't do that, we can't plate the via properly that way.
Your shop may tell you it's ok but I would expect they won't like it. There's always surface mount connectors. Or and you'd have to ask about this to but I imagine you could just not plate those vias and only route to the top layer where the pad is. There really wouldn't be much holding the connectors on the board at that point and I'd look at mechanically securing them to the board. Maybe epoxy or screws or something like that.