Many flex fabricators are certified to UL on many different flex
constructions. These are usually Type 1 and 2.

When you get into type 3 and 4 some case vendors will get approved for a
high volume project and build from that. You can also build rigid flex
products in accordance with UL rating by simple using UL rated material but
not certified do to the lamination not being approved.


www.quickturnflex.com
Thank you, 
Jim Mahoney 
Quick Turn Flex Circuits, LLC 
Applications Project Manager 
P# 603-821-7071
M# 603-305-6250 
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-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
[Jeffrey] [Jenkins]
Sent: Monday, July 20, 2009 12:36 PM
To: [log in to unmask]
Subject: [DC] Flex circuit and UL94V-0 requirement

Good Morning,

I have a question that was presented by one of our engineers in regards
to requiring UL94V-0 rating on flex circuits that I hope somebody with
experience doing flex circuits may be able to better answer as I have
only done Rigid boards.

Their question stems from a vendor response to Rigid-flex board design
which was done by an out of house designer, who added a requirement for
UL94V-0.  The vendor responded that they don't get UL94V-0 ratings on
Flex circuits because the cost of obtaining the certification was too
substantial.

I typically always call it out on Rigid boards, but as I said, I haven't
done Rigid-flex and my only recourse thus far has been to comb through
other peoples flex board designs, and none have stated the UL
requirement.  But that isn't to say it may not be buried in one of the
spec's called out.

Does anyone out there typically call out UL94V-0 ratings on their flex
circuits?  Along with this, are there any facilities or courses in
design for flex circuits?

Thanks in Advance!!

-Jeffrey

________________________________


JEFFREY A. JENKINS
SR. PCB/CAD Designer CID+
L-3 COMMUNICATIONS LINKABIT DIVSION
3033 Science Park Rd. 
San Diego, CA 92121
Tel:  (858) 552-9832
Fax:  (858) 552-9487
[log in to unmask]

 

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