Conformal coating comprising binder and non-conductive particulate

Abstract

A conformal coating comprises a binding layer and a particulate which provides shielding against conductive crystalline structure growth. The particulate comprises materials that provide a tortuous path to substantially inhibit the grow of conductive crystalline structure on electrically conductive surfaces.

Description

technical field [0001] The present invention generally relates to a substrate conformal coating, and more particularly, to an improved conformal coating for substantially suppressing the effects of metal crystal structure growth produced by substantially lead-free type conductive coatings on electronic devices. Background technique [0002] Conformal coatings are typically coating materials applied to substrates such as electronic devices or electronic circuits to provide protection against environmental contamination such as moisture, dust, chemicals and extreme temperatures. In addition, it is generally understood that a properly selected conformal coating can reduce mechanical stress on an electronic device, thereby substantially reducing peeling or separation of components connected to the electronic device. Selection of an appropriate coating material is generally based on the following criteria: the type of exposure or contamination that the substrate or device will ex...

AI Technical Summary

Problems solved by technology

As mentioned above, even though conventional conformal coatings may be relatively rigid, studies have shown that they are not rigid enough to reduce conductive crystal structures or whisker growth

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