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| Date: | Mon, 3 May 2010 16:00:14 -0700 |
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Bev:
In past standards committee meetings (years ago no Rev D of 001 and 610), Jack Crawford made it clear there are NO requirements for voids in PTHs or some SMT components (e.g. gull wing). So if you find someone who has such you will be fortunate.
It was mentioned that soldered PTHs typically will have some voiding especially for those in years gone by who used various oils to cover the top of the wave solder reservoirs. The oil found its way into the completed wave soldered connections. Evidently there were not sufficient defects attributed to voiding to make it a broader issue. However given today's much tighter tolerances it becomes a very good question.
Gregg Owens
Technical Writer - Avionics
Space Exploration Technologies Corporation
(310) 363-6533
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bev Christian
Sent: Monday, May 03, 2010 12:48 PM
To: [log in to unmask]
Subject: [TN] Question about Voids in Solder Joints
TechNetters,
I was thinking about just putting "Voiding" as the e-mail title, but I
contemplated what I might get in responses and amended my title
accordingly.
My question is the following: do any of your companies have upper limits
on the amount of voiding in SMT solder joints of components that
customers have access to - like connectors and switches? These of
course are leaded components. I am not talking about Pb, but the form
of the interconnect between the component body and the board.
If so, are you willing and can you share?
Bev
RIM
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