Hi Frank,
2 layer will be less expensive with the following proviso's:
1) if it is long or very few on a panel then go with the 3 layer
2) you need either 12 or maybe 18 micron material as the copper
3) if the core polyimide is 50 micron for sure the 2 layer - if it is thinner - it depends
4) with today's equipment reliability of 1.4 mil/2 mil / 4 mil line widths
Good luck. Steve Kelly
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Decker, Scott UTAS
Sent: September-28-17 12:15 PM
To: [log in to unmask]
Subject: Re: [TN] Flex manufacturing
From my not a supper vast list of flex designs, I would go with "B" just for the reliability side of things. You didn't mention if this is a dynamic or static flex and that will also make a big difference in your answer, but for me, I'm with "B".
Later...
Scott Decker - Staff Engineer, PCB Design Services CID+ - Electronic Systems Center UTC AEROSPACE SYSTEMS
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Frank Kimmey
Sent: Thursday, September 28, 2017 7:44 AM
To: [log in to unmask]
Subject: [External] [TN] Flex manufacturing
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
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