Electronics Forum | Thu May 04 13:35:28 EDT 2017 | jmathis
Hello All, I was given an assembled flex circuit PCB and asked how the board was depanelized as there are no view-able witness marks that I can see. Any ideas? Thanks in advance on any insight to depanelizing without leaving witness marks on the F
Electronics Forum | Wed May 31 07:16:06 EDT 2017 | stephendo
Don't rule out the possibility that the board shop depanelized it and it was assembled after depanelization. Been there, dealt with it, expletives deleted.
Electronics Forum | Wed Mar 04 07:08:55 EST 1998 | Pat Copeland
I am looking for information on reflow temps for a flex board. There is only one 6 pin IC but the board has a 3M double sided tape. Is it possible to reflow without damaging the tape. Any suggestions?
Electronics Forum | Thu Mar 05 16:25:27 EST 1998 | Brian Stumm @ ETS
I am looking for information on reflow temps for a flex board. There is only one 6 pin IC but the board has a 3M double sided tape. Is it possible to reflow without damaging the tape. Any suggestions? Do you have a profiler for your reflow oven?
Electronics Forum | Mon Oct 14 15:13:52 EDT 2013 | esoderberg
Does anyone have a novel idea on how to protect the flex area during conformal spray coating? Currently using Humiseal T30 on the flex but it has to be removed very carefully to insure coating stays intact on the board.
Electronics Forum | Tue Jun 16 11:04:11 EDT 2015 | cyber_wolf
Who are the experts in the U.S. regarding polyimide bare board manufacturing ? We are struggling with warpage issues....
Electronics Forum | Wed Jan 05 17:53:52 EST 2005 | SuePH
We had a contract in house that included a flex board which required an 18 hour bake at 105 degrees. The other brds got along fine with 2 hours, but the flex board would delaminate until we went to this long bake. I don't know how the engineer came
Electronics Forum | Wed Dec 22 19:09:17 EST 2004 | rohman23
Very strange...I just logged into the internet to come post this very question for all the lurking experts. We have a 16 layer rigid-flex that we have never baked. Our board vendor is expressing concern that we do not perform a pre-bake before assy
Electronics Forum | Thu Jan 12 14:17:07 EST 2012 | blnorman
How are the vias failing? Barrel crack?
Electronics Forum | Tue Jan 17 12:06:12 EST 2012 | cobham1
The via's are cracking which then is causing all kinds of problems.
