Test & Measurement

Conformal coating inspection system extends scope

14th October 2014
Mick Elliott

Viscom will be demonstrating the S3088 Conformal Coating Inspection (CCI) system at electronica in Munich (Nov 11-14). The system which inspects protective conformal coating quickly, with full reliability is now being offered with an extended inspection scope. The system can now be equipped with angled cameras for reliable inspection between components. A wet inspection that checks the conformal coating for flaws before complete curing also is available.

Transparent protective conformal coating protects electronics assemblies against damage from moisture and wetness. Typical defects include cracks, flaws, layers that are too thin or too thick, smearing, impurities or splashes, among others. The S3088 CCI checks the entire range of defect features quickly and reliably.

The system works with efficient ultraviolet illumination, which highly contrasts the UV-reactive protective conformal coating against the background material. With the corresponding spectrally sensitive cameras, the system clearly recognises the characteristics of the conformal coating.

With a resolution of 11.7 or 23.5 µm / pixel, even the smallest flaws are easily visible. The system identifies these flaws and classifies them as defects. At the same time, various indicators that can be used for optimising the coating process are evaluated.

The inspection system ensures that the IPC-CC-830 directive for qualification and performance of electrical insulating compounds for printed circuit boards is maintained.


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