Feb 15, 2012 - This is more of a comment... the subject on "unusual contamination"... I have seen this previously and it turns out that it not contamination but is where errant solder balls ...
Fran Guminsky, Honeywell
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Feb 15, 2012 - Would it be possible to have all electronic parts constructed where the pins & leads are under them? -i.e. similar to present BGAs & packs. If this is possible, then ...
Tomas Geronimo, Sanmina-SCI Corp., USA
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Feb 14, 2012 - Great presentation. So many are still focusing on ATE and the end of the line. Makes so much sense to look for and find errors at the front. ...
Juan Arocho, CTU
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Feb 3, 2012 - Barry Ritchie has it nailed. Surface moisture is the enemy of conformal coating, but absorbed moisture is part of that. In order to form a good adhesive bond to the ...
Richard Stadem, General Dynamics, USA
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Feb 1, 2012 - Boards should be typically baked out prior to conformal coating to drive off any ambient moisture that has been absorbed into the substrate and/or components during storage. The comments about ...
Barry Ritchie, Dow Corning, USA
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Feb 1, 2012 - Other factors to consider when determining the amount of time between processing and coating are the ambient conditions that vary from region to region. My location in Melbourne, Florida is ...
Michael Marzec, Rockwell Collins, Inc, USA
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Feb 1, 2012 - Assemblies may acquire moisture on the surface, but that's not absorption. If moisture absorption is going to occur post-assembly, it is most likely to occur along the PCB edges -- ...
Bob Lazzara, Circuit Connect, Inc., USA
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Feb 1, 2012 - Be sure your PCB is free of moisture. Bad drilling and plating from the PCB manufacturer, combined with moisture will always lead to blowholes. ...
Benny Groenbjer, Grundfos, Denmark
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Feb 1, 2012 - To answer that question you have to know first how long moisture gets absorbed by a dry board at RT condition. To determine this you weigh a relatively dry board. ...
Tomas Geronimo, DAS Product & CC Process Engineer, Sanmina-SCI
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Jan 25, 2012 - I am eagerly awaiting the arrival of this along with the paperless office and toilet. ...
Charles Stringer, Edwards Vacuum
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Jan 25, 2012 - The use of components with higher physical load like bigger dimensions, exposure to mechanical stress or higher weights leads to a need of reliable fixation. A combination of electrical contact ...
Daniel Schoeni, ETH Zurich
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Jan 24, 2012 - I think this is a VERY misleading question. Reminds me of some of the outstanding political surveys this wonderful election year - at least in the USA.
This presumes that ...
Dennis Fritz, SAIC,Inc
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Jan 24, 2012 - The Demise of the Plated-Through Hole? Hardly. As long as there is a need to interconnect circuit layers within a PCB there will be plated-through holes (PTHs). PTHs have in-fact ...
Robert Lazzara, Circuit Connect, Inc.
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Jan 24, 2012 - TH parts will be around as long as circuit board assemblies continue to be used. Regardless, plated through holes will always be needed for the via holes. I'm really surprised ...
Jerry Wetzel, Innovative Imagineering
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Jan 24, 2012 - My question is, what is the difference of using lead-free solder (wire core, flux) vs lead, it could affect field operation failures? Most of our electronics assemblies are general assemblies ...
Carlos Moreno, Avnet
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