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Bubbles formation in conformal coating

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#76372

Bubbles formation in conformal coating | 20 September, 2016

Hi,

Currently we are facing bubble formation in conformal coatings in the pcba. Have varied various specs of the conformal coating machine, even during manual application also having the same issue. the material used is silicone conformal coating. Need possible suggestions to overcome this problem.

Thankyou

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#76373

Bubbles formation in conformal coating | 20 September, 2016

I know this doesn't answer your question, but thought that the "operational qualification" section was thorough here [look in the "white papers"]: Conformal Coating 101 [http://www.btw-inc.com/pdf/CONFORMAL_COATING_101.pdf]

In answer to your question: You're creating bubbles in your conformal coating by trapping air or vapor in the coating. For more: GOOGLE => 5 Common Causes of Bubbles in Conformal Coating (and Their Remedies)[Diamond-MT's Blog]

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