Hello Richard,

I don't really have a recommendation for a vendor per se, but I have had some 
experience with castellated boards in the past, both as a PCB fabricator and as 
a customer. Almost all my experience was with Teflon based PCBs, which are 
quite a bit softer than FR4. They can be a pain to singulate without tearing 
away the plating. I've tried routing with several styles of bits, with varying 
results, but the best results I've seen were PCBs singulated using a dicing 
machine, which is apparently a machine used to singulate silicon die.

As for FR4 castellated PCBs, I can only recall one, which we purchased from 
Vermont Circuits. You might also want to contact Cosmotronic in Irvine, CA.

Bill


On Tue, 7 Sep 2010 10:56:54 -0700, Richard Hatano 
<[log in to unmask]> wrote:

>Hello Everyone,
>
>It's been a few years since I've been on TechNet, and it's good to see some
>familiar names.  I hope you're all doing well in these difficult times.
>
>I know my question begs more questions, but I would like to hopefully keep
>it simple by asking if anyone can recommend a pcb fab company to get some
>boards with castellated edges made.
>
>Right now these are prototype and I don't know what the quantity will
>eventually be.  Other than the castellation there is nothing strange about
>them.  They are less than 1 sq. in. in area, 4 layer, SMD one side, 6/6 mil
>trace/space, 14 mil via.  Having thinner boards (0.031") would be preferred
>but seems to really impact cost, so it is a secondary parameter.
>
>If anyone can reply with a recommendation it would be hugely appreciated.
>
>Thanks,
>
>Richard
>
>
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