Hi Richard

Not sure on the reliability issues relating to silicone but what you do tend to get with silicone based tapes is a de wetting effect. Is this only cosmetic in nature? I guess it's a question of the inspection criteria you are using. In the end we try and avoid it as it tends to require touch up which can lead to problems in itself.

A good example of what occurs is in one of the images in the database at http://www.nexus3c.com/conformal-coating-defects-database

It shows dewetting around masking dots on a perfectly clean pcb. 


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On 6 Aug 2013, at 20:17, "Stadem, Richard D." <[log in to unmask]> wrote:

> Do you think the silicone adhesive on Kapton and Shercon tapes can create a manufacturing issue during conformal coating or for sensitive electronics?
> Doug, I would be especially interested in your respected input on this question.
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