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Conformal Coating Height Inspection

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#36988

Conformal Coating Height Inspection | 6 October, 2005

What is the best/most economical way to check the thickness of conformal coating after being processed. Would a standard height gage do? Thanks in advance...

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Amol

#36993

Conformal Coating Height Inspection | 6 October, 2005

measure the board thickness before coat by a screw gauge, and then after, when the coating has fully cured. this works well for a single side coat.

once your wet to dry thickness is down, you can spray to a particular thickness wet and be reasonably sure that the dry thickness is within specs. BTW what kind of coating is this?

Amol

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#36994

Conformal Coating Height Inspection | 6 October, 2005

Humiseal 1B73 Acrylic, thanks for the suggestion.

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SuMoTe

#36995

Conformal Coating Height Inspection | 6 October, 2005

Put a known thickness gage next to your boards to be coated. Then coat it in the same pass as your boards. Measure the "new" thickness of your gage and subtract the difference. That will be your coating thickness. This is assuming your coating your own boards.

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URL

#36998

Conformal Coating Height Inspection | 6 October, 2005

A wet film gage works best.

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#37003

Conformal Coating Height Inspection | 6 October, 2005

URL: Who are some suppliers of "wet film gage"?

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URL

#37010

Conformal Coating Height Inspection | 7 October, 2005

There's a ton of em'. We used the one from Paul N. Gardner Company, part # WF-CCD. They cost 0.95 each, so if someone decides the gage looks better in their garage, it's not that big of a deal. We set up a program that puts down 4 stokes on a test board and then measure.

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