I went with Sierra this time, to try them (and their new 4-layer pricing scheme) out. They use "standard" 6/6/15 rules, compatible with pcb-pool and 4pcb, other vendors I've used.
My initial impression is that the quality is quite good, almost as good as 4pcb. The drills were within a mil or so, but the mask was off by 3-4 mil, just enough to barely overlap the copper. 4pcb's mask was off a little too, but not quite enough to overlap the copper. It's close enough to be statistically "about the same". Here's a 15 mil drill with 7.5 mil annulus, 3 mil gap-to-mask, and an 8 mil line: http://www.delorie.com/tmp/spe.html One other drawback was that they don't accept a separate outline gerber; I had to modify pcb to draw the outline on the solder mask gerber. They were, however, slightly cheaper. _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
