Christian A. Weagle wrote:

>>I've been looking for a PCB fab to make cheap PCBs in small quantities
>>(1-3) for prototyping (I'm in the US). For 2-layer boards I'd want
>>    
>>
>with
>  
>
>>soldermask/silkscreen, and I also work on 4-layer boards as part of a
>>research project at school.
>>    
>>
>
>I have use both barebonespcb.com (a division of 4PCB.com, AKA Advanced
>Circuits) and AP Circuits (Alberta Printed C.).  Both of these companies
>are serious vendors, who offer a range of capabilities starting with the
>minimum thing that could be called a PCB and working up to 16-layer RF
>monstrosities with blind and buried microvias, ceramic stiffeners,
>teflon, etc. etc.
>
>  
>
I used AP Circuits for years, but I have become disenchanted with 1/2oz 
copper as
a primary conductor size. Since I always use 1oz in my normal designs, 
the action
(mostly GND signal) of 1/2oz copper is not representative enough of the 
final
product to be of any advantage.

barebones (4PCB) uses 1oz laminate, so works better for me.

--Bob

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