This is a rare condition.  When it happens, usually I see the crack propagate thru the adhesive eventually.


Nick Koop | Sr. Field Application Engineering - Flex Technology | TTM Technologies
(763) 245-4825 - Office | (763) 245-4825 - Cell | [log in to unmask] www.ttm.com






-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of Hammill, Vicka (EHCOE)
Sent: Wednesday, October 28, 2015 10:56 AM
To: [log in to unmask]
Subject: [IPC-600-6012] Flex quesstion



Has anyone ever seen this condition of cracking of the Kapton on a flexible part of a  rigid flex?   If so, do you the cause?   We have done crossections on this and it showed the kapton only cracking...the adhesive was not cracked and remained untouched.  So far, we have found no specific reason for the cause.

Any input would be appreciated.









Vicka Hammill

Staff Engineer/PB CAA



Honeywell

Lync Phone: 480-627-5547

FAX: 602-436-1005

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