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Doug Pauls

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Principal Materials and Process Engineer
Rockwell Collins

Doug Pauls has a bachelors in Chemistry & Physics, Carthage College, BSEE, Univ of Wisc Madison. He has 9 years working experience for US Navy - Materials Lab, Naval Avionics Center Indianapolis. 8 years Technical Director, Contamination Studies Laboratories. 11 years Rockwell Collins Advanced Operations Engineering.

Doug Pauls has submitted responses to the following questions.
Contamination From Anti-static Foam
Many of the pink poly materials from that time era were doped with various amine complexes to provide the static ...
Cleanliness Standards for Electronic Components
There are no present standards for how clean a component has to be to have long term reliability, either in ...
What is the IPC Definition for Uncommonly Harsh?
Uncommonly Harsh is anything greater than 10% morethan Commonly Harsh. ...
Removal of Coatings from PCBs
The best way to remove conformal coating depends on the coating that is to be removed, how hard that coating ...
Conformal Coating Press Fit Connectors
First,IPC-A-610 is not a requirements document. It is a visual acceptancedocument. Requirements would come from J-STD-001 or the engineeringdrawing. But, ...
Concerns Using Hand Sanitizers
I did a study on this topic a few years ago. It was published in the IPC Apex proceedings. The ...
Question About J-STD-001
The short answer is yes. J-STD-001, in both the present Rev E and the proposed Rev F(nearing finalization) there is ...
Mixing Silicone and Acrylic Conformal Coatings
Is there a compatibilityproblem? O yes. Acrylics and silicones do not mix well. It isgoing to be difficult to fully ...
Conformal Coating Recommendation
It depends on howmuch access the humidity has to the electronics. If you are talking abouthumidity, and humidity only, then ...
Coating Scored Panels Prior to Separation
Well, the answer tothis, like any good engineering answer, is "It Depends".What coatingare you using and how does that coating ...
Conformal Coating Over Heat Sinks
In my opinion, yes,you should mask the heat sinks. Each conformal coating will have someimpact on heat flow. Ask the ...
Deionized Water Sample Testing
Keep in mind that deionized water, cleaned to high levels, is a very hungry solvent and will pull in ionic ...
Can Solder Joint Geometry Change Resistance?
I doubt that thesolder joint or its shape has anything to do with your leakage currents. I have only found ...
Syringe Dispensed Solder Paste for Hand Soldering
I would only use asyringe to dispense solder paste in applications where the volume of paste wasnot critical, such as ...
Flux Oozing from Insulated Wires
I would bet you areusing stranded wire. When you flux the wire, capillary forces pull theflux far up under the ...
Conformal Coating in Low Humidity Environments
I will give you myfavorite engineering answer - It Depends. What do you mean by"low humidity"? And what conformal coating ...
Bromine Free PWBs
Bromine complexes,primarily tetrabromobisphenol-A (TBBA), has been used as a flame retardantmaterial for many years in laminate materials. The FR in ...
Cleaning with Sodium Bicarbonate
That gets an "ItDepends" kind of answer. Whether or not you have long term reliabilityissues depends on the thoroughness of ...