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How to design plated edge pads?
988 1 Dec 18.2019, 18:25:07

Hi! 

I'm trying to make similar edge in Eagle:


It's kind of a combo of plated holes and half holes and pads.  I'm not entirely sure how to draw this in Eagle, maybe someone knows existing library that has this kind of part? Doesn't have to be same number of pins, I can modify it.  I wanted to make sure that my PCB house can make PCBs out of it too 
It actually looks like this:



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A****min

Dec 19.2019, 18:05:20

Hi
The magic term for that structure is "castellation". 
Since you are plating around the edge of the board, it's not "obvious" to the board fabricator what you are doing. Based on a normal Gerber file, he has no way to tell if it is edge plated or simply two pads on each side of the board. If there is a standard way to convey this to the fab, I am not aware of it. I've always seen it done with a note on the drawing. Yes it *is* clunky. Somebody else may have a better solution. 
One thing to consider -- This is not a "normal" thing to do on a pcb board. We do it on a lot of our boards, but that rules out a lot of board houses for fabricating them. The net effect (especially in small volume / quick turn) is a significant cost adder. It's not just the adder at the shop you wound up with. It's their price compared to the "other guy" who would have been much cheaper to start with.  

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