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Ask the Experts Member |
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Alan LewisDirector of Application Engineering Asymtek |
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Mr. Lewis worked for The Aerospace Corporation for 6 years before joining Asymtek in 1993. He holds multiple patents in dispensing technology for electronics assembly and packaging. He has a Master's Degree in Mechanical Engineering from University of Missouri-Rolla. NOTE: Mr. Lewis is no longer working at Asymtek.
Alan Lewis has submitted responses to the following questions.
Changing Conformal Coating Material
There are several considerations when making a switch like this. First, sounds like you are taking the correct precautions for ...
Wave soldering LCDs
There is another option other than wave solder. EFD developed a system that dispenses solder then uses a laser to ...
Coating or encapsulating tin-lead solder joints?
There are conformal coating materials that are designed to protect solder joints from corrosion in harsh environments. They were not ...
BGA Rework - with or without solder paste
Although you may be able to re-attach a new BGA and have it pass electrical tests, you may be causing ...
Control Electronic Static Discharge
In most cases, electrostatic discharge protection should be built into the equipment, it is difficult to retrofit, but I can ...
Good epoxy or cement for bonding BGA packages to PCB
You will no doubt here back from the material suppliers who will have recommendations on specific products. From the perspective ...
SMT adhesive problems after wave solder process
I hope I'm not stating the obvious here, but often this type of problem is related to a component placement ...
Baking lead-free and lead PCB's before assembly
I'm not sure that I can give a comprehensive answer, but I will attempt to give you some helpful information. ...
Component baking issues
I responded to a similar question a few months ago. My experience has been with circuit boards more than reel ...
Proper method to bake PCB's
I'm not sure that I can give a comprehensive answer, but I will attempt to give you some helpful information. ...
Reflow oven profilers
I don't sell profiling equipment. My experience has been with curing ovens which is a bit different than reflow ovens. ...
Pre-wash boards prior to conformal coating
Almost all material suppliers recommend pre-washing AND drying the boards before conformal coating. In some cases, plasma cleaning is called ... |
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