Anan

Have you performed an analysis of the residue such as a SEM/EDAX? If you do not have this equipment, you're the supplier of your plating chemistry probably does.

Best regards

Lee

J. Lee Parker, Ph.D.
JLP Consultants LLC
804 779 3389


  ----- Original Message ----- 
  From: Anan Zreik<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Thursday, September 01, 2005 9:18 AM
  Subject: [TN] chocolate plating


  '
  Hi every body :

  every so often for a long period of time we get a "chocolate copper"
  residue on the surface of our boards on our electrolytic copper plating
  line . This "chocolate plating" can be removed by hand , and it is not
  connected to the copper below .

  does anybody know this phenomena , and its cause??

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