> Um, I don't think 6 mil space/6 mil trace is fine enough to > successfully use on 1mm pitch BGA. Theory tells me 6 mil space and > 5 mil trace rules (or vice versa) are the minimum. It's hard to > find modern parts (e.g., Xscale-class cpu, or a mid-size FPGA) that > is not in a BGA.
http://myropcb.com/pcbfab.htm 5/5 rules, 4L+m/s up to 30sq, $160 for 4 boards. 6L+m/s is $292/4. They're the only ones in my chart finer than 6/6. Canadian company using Chinese manufacturers.
