Electronics Forum | Mon Feb 18 22:05:58 EST 2008 | callckq
Dear All, What is the possible root causes of the dendrite growth? How long its take to cause this dendrite growth? Can dendrite growth cause electrical short? Is there any particular location on PCBA that dendrite tend to grow? Thanks, Sean
Electronics Forum | Wed Feb 20 08:57:13 EST 2008 | tonyamenson
We test for board cleanliness using an ionic tester. It's been my experience that if your board is clean you take away the possibility of growth even if the unit encounters moisture. We actaully had a problem where our wash lost pressure due to a mi
Electronics Forum | Tue Dec 14 09:53:03 EST 2004 | paul_fisher
Yep fully functional and failed during the test. 25 to 55C in 3 hour hold for 9 hours then 55C to 25C in 3 hours hold for 9 hours then repeat. Humidity at 95 percent! Boards only part conformally coated. Growth with and without the coating. seems to
Electronics Forum | Tue Feb 19 08:46:06 EST 2008 | rgduval
The last time I encountered dendrite growth, it was within a component package. I believe we were experiencing it within a crystal. The root cause was water intrusion during in line wash. The component was supposed to have been sealed and safe for
Electronics Forum | Tue Dec 14 11:34:34 EST 2004 | saragorcos
You may also want to contact Terry Munson at Foresite - he is very knowledgeable about the root causes of dendritic growth - you can reach him at 765-457-8095 - he can more than likely provide you with some good advice. Sara
Electronics Forum | Tue Dec 14 04:01:08 EST 2004 | paul_fisher
We have a problem with dendritic growth that is affecting a new board going into production. This is of concern because they were subjected to Damp Heat Cyclic Tests as part of the product validation testing during their development. Fails to date
Electronics Forum | Wed Feb 20 13:56:16 EST 2008 | patrickbruneel
Tony, Conformal coating will protect the board from outside moisture but will also encapsulate Ionics and moisture when present on the board.
Electronics Forum | Wed Mar 12 07:22:31 EDT 2008 | Sean
Hi All, Thanks for your inputs...I really appreciate it!! Rgds, Sean
Electronics Forum | Tue Dec 14 09:32:59 EST 2004 | patrickbruneel
Hi Paul, One thing I can tell you for sure "lead free" is not going to solve your problem, because spectrum analysis have shown that dendrites at there final stage always consists of pure tin. The higher the tin content the higher the risk for dead
Electronics Forum | Tue Dec 14 07:32:57 EST 2004 | davef
On contaminated assemblies: While you isolated part of your dendritic growth to contaminated boards, could it be that you have a similar problem with other components, rather than your flux? Is this flux new? Have you had similar problems with thi
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