gEDA-dev: code sprint ideas
Peter Clifton
pcjc2 at cam.ac.uk
Mon Oct 15 14:01:07 EDT 2007
On Mon, 2007-10-15 at 13:12 -0400, DJ Delorie wrote:
> > I wasn't assuming the errors were normally distributed, but I take
> > you're point. Anyone friendly with a fab house enough to find out how
> > these registration errors work for real?
>
> I'll ask 4pcb...
>From what I can tell, one of the fancier fabs in the UK. They don't
specify what distribution their 2mil registration tolerance follows, but
they do show a rectangular mask cutout. (Might just be for illustration
purposes though).
http://www.stevenagecircuits.co.uk/products/capability/solderresist.jsp
Peter
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