Bill

You have received some very good suggestions. The fact that the issue appears to be isolate to a particular customer is important. Something else I would suggest is to identify the contaminate and its thickness; a SEMs analysis of the surface might be informative.

Best regards
Lee
J. L. Parker Ph. D.
JLP Consultants LLC
804 779 3389
  ----- Original Message ----- 
  From: Bill Dworak<mailto:[log in to unmask]> 
  To: [log in to unmask]<mailto:[log in to unmask]> 
  Sent: Monday, June 15, 2009 1:47 PM
  Subject: [TN] HAL-Leaded assembly


  Hello everybody, I am looking for some knowledge on what I see is a basic type problem that is driving me crazy. I am a sales guy who covers a sizable territory and in that territory for a PCB manufacturer (yes one of those) I have one account that I have been working with for about 4 years now that continuously has issues assembling both hand assembly as well as pick & place. 
  The surface finish is HAL (leaded) this is a military account that is pretty well structured in their processes. What I get told is that there seems like a contamination is on the surface when they scrub the surface it makes it better but not 100% better.They have sent back samples for us to look at , we saw nothing on the surface no contamination nothing wrong at all. 
  If this was one of a few that has the same or similar issues it would make some sense and I could go to the people I work with asking them to look into this issue. But it is the only company that has this issue. 
   Has anybody seen a similar type of a situation before? Understood that you cannot fix this but would appreciate advise as to where to look so hopefully this can be solved. 
  Thank you. 

   Bill Dworak 

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