Hi Technet,

We have implemented non-clean SMT and wave soldering processes for more than
10 years and there's no any issue, but recently one of our new customer
required us to buy the Omega tester and set up the Ionic Contamination test
for the non-clean PCBA, according to IPC-TM-650. 2.3.25.   

We feel the Ionic Contamination test might not be an appropriate test for the
non-clean PCBA, but is there any technical paper or industry standard for
this topic? We need some supporting documents for further discussion with our
customer.

Any suggestion/feedback would be appreciated.

Regards
Willis Tam


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