The B option is preferred 
Quality and long term cost

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‫ב-28 בספט׳ 2017, בשעה 17:43, ‏‏Frank Kimmey ‏<[log in to unmask]> כתב/ה:‬

> I sure hope there are some flex folks out there today.
> I need to know which would likely be cheaper in large quantities:
> 
> A: 2 layer with 2 mil wide traces
> B: 3 layer with 4 mil wide traces
> 
> I guess the big question is what kind of premium should be expected when asking to etch to 2 mils
> Any and all help is appreciated.
> Thanks,
> FNK
> 
> Frank N Kimmey CID+
> Electrical Engineer / PCB Design
> VeriFone Inc
> 1400 W Stanford Ranch Road, Suite 200
> Rocklin, CA 95765 USA
> W: 1-916-625-1818
> M: 1-916-833-9877
> [log in to unmask]
> 
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