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Re: gEDA-user: sparkfun 4 layer boards
On Fri, 22 Aug 2008, DJ Delorie wrote:
>
> Just got my boards back. Yes, it was a long time, but they're new
> with the 4 layer service and don't yet have the volume to fire off
> boards at quick intervals. Hopefully the schedule will improve ;-)
>
> Anyway, image here: http://www.delorie.com/pcb/sf4l-1.jpg
>
> Of the boards I got, the quality varied. The above is the worst of
> seven otherwise identical boards. On the best, the mask and silk were
> perfectly placed, but on this one the mask was 3 mils to the right and
> the silk was about 5 mils to the left.
>
> The via is a 31 mil copper with 15 mil hole. The IC is 0.65mm pitch.
> The traces are 8 mil (although they can do 6/6 in 4 layers). The
> broken mask bridges are only 3 mil wide, so no surprises there.
>
> Overall, I'd say the quality was almost as good as the other fabs I've
> used, so if you have a small 4 layer board to make and plenty of
> patience, sparkfun (batchpcb.com) is an option. Under 10 sq inches
> it's cheaper than pcb-pool.
What's the quality and turnaround with a two-layer board from sparkfun? I
have a few toys that I've been meaning to get made.
--
David Griffith
dgriffi@xxxxxxxxxxxxx
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