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May 1999

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Subject:
White Residue on solder joints
From:
David yeh <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Wed, 26 May 1999 21:10:03 +0800
Content-Type:
text/plain
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text/plain (31 lines) 
Has anyone ever come across white residues that looks like snow cap
covering the solder joints? The phenomenon only manifested  a few days
after Aqueous wash and EDX captured high lead and oxygen. The white
residues are so stubborn that they could not be dissolved in DI water and
IPA. We use a water soluble paste and clean our assembly twice

All inputs are welcome and appreciated.

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