EEVblog Electronics Community Forum
Electronics => PCB/EDA/CAD => Altium Designer => Topic started by: babi on October 09, 2015, 11:29:57 am
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I am designing a PCB to fit into a 44 pin PLCC socket. The edge of the board must be plated like this:
(https://www.xsens.com/wp-content/uploads/2015/07/MTi-1_Clipped.png)
Do normal manufacturers offer this kind of edge plating? How can I add this kind of edge plating to my pads in Altium?
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In the case shown that's opposite to the usual way called "castellations", where you half route off a plated hole:
http://www.viasystems.com/documents/technology/application-note-castellated-holes.pdf (http://www.viasystems.com/documents/technology/application-note-castellated-holes.pdf)
(http://i.stack.imgur.com/YZKA3.jpg)
You want edge plating with the holes routing out the edges to form the contacts (not sure if there is a common name for this?)
Not all manufacturers will do edge plating, but most decent ones will.
You normally specify this as a detailed note on your geber files. There isn't a way to do it in Altium itself AFAIK.
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Thanks Dave.
I know about castellations, but I'm afraid if I use castellation instead of edge plating, the board won't fit into the PLCC connector. Do you have any ideas?
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it looks like these would be done with through-plated slots that are then routed through and holes drilled between them. This sounds like it would require multiple drilling/routing stages, so you will almost definitely have to communicate this with the manufacturer.
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Thanks. Yes, it seems I have to design a plated slot and have the manufacture drill the extra copper.
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some manufactures call these "half-holes" as it is a normal plated round hole which is cut in a half by routing
you can do the same with routing and have flat edges, yes
just need to specify routing paths for plated and non-plated spots in different layers and explicitly tell about this to manufacturer