Willis,

  I would be curious to hear the test restuls.

 Do you have any rework ( :-)  ) and do you need to clean that for cosmetic appearance? If so soes that cleaning affect the No Clean flux?

Thanks,
Bob K.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of WTSJ-Willis Tam
Sent: Tuesday, July 10, 2012 12:13 AM
To: [log in to unmask]
Subject: [TN] Ionic Contamination Test for Non-clean PCBA, is it really necessary?

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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