Lee, it has been more than 15 years, but I measured synthetic diamond coatings, with thickness a fraction of what I expect conformal coating should be, on metals with an ellipsometer and an instrument called a 'Nanospec'. The ellipsometer was more accurate, as it measured the material property (dielectric permittivity, I think it was) of the specimen then used that to determine coating thickness.  The nanospec, if my memory is correct, had a catalogue of material parameters from which you called up yours and got a thickness in one observational step.

Both used a laser, again if my memory is correct.  The area of coating being measured was a tiny spot, much smaller than any dimension of a component leg I know of.  Louis



-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Lee Hitchens
Sent: Thursday, May 07, 2015 3:50 AM
To: [log in to unmask]
Subject: [TN] Conformal Coating Thickness Measurement on legs of components

Hi all

I am being asked regularly now on options for measuring coating thickness on legs. I am trying to determine if there is actually a practical solution?
Cost is less important compared to being a workable relatively quick process? 

One thing that could be an issue is many times its a silicone coating and this tends to be less than clear optically. Some systems need clear coatings to be successful.

Has anyone had any success with this?

Best Regards

Dr Lee Hitchens

SCH Technologies is a Division of SCH Services Limited

Mob: +44 (0) 7862 25 33 21

www.conformalcoating.co.uk <http://www.conformalcoating.co.uk/>

 




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