Hi Steve,
You can use a flexible soldermask for these repairs (comes in green or
brown/amber). You will pass all dielectrics but it is not as flexible as
kapton/polyimide so if you have a tight bend radius it can crack. Good luck.
Steve Kelly

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Steve Gregory
Sent: Thursday, March 15, 2007 10:35 AM
To: [log in to unmask]
Subject: [TN] Flex Circuit Scratch...


Morning All!

There were a few rigid flex assemblies brought to me this morning with
some scratches in the coverlay of the flex. They are pretty minor, but
they do go down into some traces a bit. I don't think the traces are
really signal traces, but are part shielding pattern on the outside of
the flex. Check-out:
http://stevezeva.homestead.com/files/Flex_Scratch.jpg

My question is; is this a defect that has to be repaired, and if so what
do I use to repair the scratches with? Normally I would use soldermask
on a rigid board if the scratches doesn't reduce the trace cross-section
beyond limits, but these traces aren't signal traces, and this isn't a
rigid board.

I think this happened during the de-masking operation after conformal
coating...

Thanks!

-Steve Gregory-

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to
[log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to
[log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
for additional information, or contact Keach Sasamori at [log in to unmask] or
847-615-7100 ext.2815
-----------------------------------------------------

---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------