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| February 10, 2012
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Circulation Over 51,000
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December 23, 2009
Skipped Solder Joints
We are experiencing skipped joints on a variety of products manufactured through our wave solder process.
A cross section of various PCB assemblies confirms that the defects are greater on boards with thicker resist and lower on boards with thinner resist, 50% lower than the pad height.
Can you offer opinions on why we are experiencing this problem?
A. I.
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Have you tried selective soldering on these boards? With selective soldering you have a lot more control over the process.
If you are interested in sending any sample boards to us we would be more than happy to run them for you.
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Todd O'Neil
Sales Manager, Soldering products
JUKI Automation Sys.
Mr. O'Neil has been part of the electronics manufacturing field for 17 years. As Sales Manager for all Soldering products at JUKI, his main objective is to continue to supply equipment providing the "Lowest Cost of Ownership."
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Reader Comments
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Is it Lead Free or Tin-Lead solder? In addition to D.M.'s ideas, the pcb's could require more dwell time, slower feed rate through the wave.
V. B.
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I agree with Todd.
Selective soldering inherently provides the capability to develop the best process for each component and even select pins on the same component (like additional dwell time for a ground pin).
All SS manufacturers will run your samples free of charge to demonstrate the process.
Alan Cable
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This sounds like one of two things are happining. One being that the wave height is too low, and the other that the pcb is not getting fluxed fully across the panel.
D. M.
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