|Ask the Experts Member|
Pierce Pillon is the Laboratory Manager and lead formulations chemist at Techspray, a division of Illinois Tool Works (ITW) and a leading manufacturer of chemical products for the electronics industry.
Pierce Pillon has submitted responses to the following questions.
Adding Chlorine to a DI (Deionization) Water System
Depending on the specific use for the DI water, it may not be necessary. I assume it's for process use, ...
Conformal Coating in Nitrogen Environment
Besides purity & preventing solvent loss, the main reasons for choosing nitrogen as a blanket is its inertness and to ...
Contamination Using Solvent Dispensers
Unless you have a check valve behind the dispenser brush, chances are high for potentially drawing a contaminant back into ...
While there are many good products on the market aimed at replacing TCE (as well as Perchlorethylene and methyl chloride), ...
Conformal Coating Recommendation
A stock answer for these type of service environments would be a silicone coating,of which there are many to choose ...
Cleaning Military Circuit Boards Contaminated with Sand
Ithink to remove the sand/grime/loose debris, I would use a very low pressuresource (dry) such as nitrogen or even a ...
Dam & Fill vs. Conformal Coating
Dam & fill application is used for a variety of reasons. Some are purely aesthetic in nature, ie to give ...
Stencil Cleaning Procedure
I would recommend reviewing the IPC-7526 document, Stencil and Misprinted Board Cleaning Handbook. It's a very good overview of stencil ...
Un-cleaned PCB Assemblies Potted
All of the water-soluble fluxes I am familiar with are highly activated. These residues must be removed, and as soon ...
Conformal Coating Over Heat Sinks
Applying conformal coating in general to a heat sink or an associated accumulator sink will affect its ability to dissipate ...
Deionized Water Sample Testing
About the disparity of the test results - Remember the meter is sampling from a closed system. You're securing a ...
White Discoloration After Ultrasonic Cleaning
Without actually seeing the discoloration, it' difficult to tell if it's an oxidation problem possibly caused by a component of ...
Dewetting of Acrylic Conformal Coating
There are a few factors that need to be addressed to narrow the problem down.Is there any cleaning of the ...
What is Causing Oxidation?
You didn't state what type of service the assemblies are in. I assume that they are not hermitically sealed. In ...
Stagnant DI Water Usage
You didn't mention whether your cleaning system is open or closed loop which will make a difference on system charge ...
Uneven Conformal Coating
I believe there is a potential residue problem on the substrate. The source can be a contaminant that was not ...
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