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March 2004

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Subject:
From:
Somtawin Pornpottanamas <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 16 Mar 2004 23:44:00 -0500
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Now we have some problem in one component. The component was plated
Nickel (electroplated) , and  base material is phosphor bronze. The
problem we found was solderability failed. We try to find out what's the
cause. We have to inspect the solderability   by dipping test before
passed to the line. Some failed some passed. we had done the analysis to
compare the good one and bad one. We had check Nickel thickness (XRF,
cross section), phosphorus content and grain structure (by SEM & EDX).
From  the data , it show the different. But we don't know how does it
effect to the solderability. Does anyone know what 's the parameter that
affect to solderability, how? And what 's about the contaminate in
Nickel bath ? 

From EDX we found Fe element in bad part, does Fe effect to
solderability? 

 

Thanks & Regards,

Somtawin Pornpottanamas

 


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