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August 2005

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Subject:
Re: dendritic growth
From:
Joyce Koo <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Tue, 2 Aug 2005 09:22:31 -0400
Content-Type:
text/plain
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text/plain (43 lines) 
if you use pure tin plating as connector, you might get dendritic growth or
tin oxide flake off... I thought you are not allow to use press fit in
aircraft or armer vihecle...strange...
                                   jk

-----Original Message-----
From: TechNet [mailto:[log in to unmask]]On Behalf Of Karen Walters Ebner
Sent: Tuesday, August 02, 2005 7:50 AM
To: [log in to unmask]
Subject: [TN] dendritic growth


We recently moved from soldered connectors to press fit connectors.  Since
this time randomly we observe on boards between the pin on top of the
conformal coating a white material growth between the connector pins.  We
are going to investigate the what type of contamination may be on the
board but if you were going to list most probable causes and corrective
actions what would they be?

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