Has anyone ever seen white contaminate ( like a crystal) on assembly
boards , between IC lead? I found white residue on  some board after
reflow . I try to clean by used IPA, flux removal solvent and also DI
water. But could not remove it. I also found that after we used the
solvent to clean, the white residue increase more.

Our process used no clean . What is this residue?  What type of solvent
that should be use to clean flux residue when we have to rework or
Dedug?

 

Thanks & Regards,

 

Somtawin Pornpottanamas

Material Engineer

Kimball Electronics (Thailand)

Tel. 038-401566  ext. 211

Fax. 038-495029

 


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