Parylene Coating Overview
Parylene coating is the ultimate conformal coating for assemblies that are likely to be exposed to extreme excursions in temperature and humidity.
Typical applications demanding Parylene coating
Avionics systems (moving rapidly between low and high altitudes, with resultant changes in temperature and humidity) Marine systems, (both sub-sea and surface, exposed to extremes of moisture & humidity) Critical assemblies compliant with RoHS lead-free regulations (where the very real risk of tin-whiskers causing failure compels the use of Parylene to control that risk.)
Parylene is a typically thin vacuum deposited layer, commonly between 20microns and 24 microns when coating a pcb assembly, providing high voltage isolation and physical protection whilst also being the perfect waterproof jacket!
Being vacuum deposited the coating covers the assembly very evenly, penetrating the smallest orifice, and so the combination of being a thin layer and one of uniform thickness prevents parasytic effects, even on high frequency circuitry, which if spray or dip coated might suffer performance variations because of a variable thickness.
Parylene is the ultimate solution; high level protection without any side effects!
There are only a handful of Parylene coating facilities in the UK and we are pleased to offer this coating process as an in-house service at preferential rates, having a bench-top machine for small assemblies and a larger free-standing machine for larger assemblies or larger volumes.
Parylene coating can be removed when required using an air abrasive system, the abrasive being organic and non-static generative.