Parylene coating is performed in white and clean room facilities with custom-designed equipment and is derived from proprietary dimers. Parylene is applied under vacuum by vapor deposition at room temperature. 

Stage 1 SUBLIMATION – the dimer is heated in a partial vacuum to 150° C resulting in conversion from a solid to a gaseous state. Coating thickness and uniformity are both dictated by the amount and purity of dimer used. Our proprietary dimers are 99.6% pure. 

Stage 2 – PYROLYSIS gaseous dimer is heated in a furnace. As the temperature rises the molecular structure changes and it begins to crack or break down. At over 650° C the dimer is split into monomers. 

Stage 3 – POLYMERIZATION – In the deposition chamber, where the coating of the customer-provided product takes place, the parts to be coated are maintained at room temperature. Still, in its gaseous phase, the monomer is drawn into the chamber and undergoes polymerization. The nanoparticles combine chemically to provide a chainlike or network molecule. At a rate of 1-2 microns per hour, a single clear coating builds up one molecule at a time, encapsulating all exposed surfaces. Controlled coating thicknesses ranging from less than 10 nanometers to 70 microns are achieved in a single operation. 

1. Monomer flow is directed tangentially to the chamber load using a proprietary fixture design to enhance diffusion and coating uniformity while minimizing raw material consumption. 
2. Variable Aperture Plates are below the fixtured parts, and these plates are pre-adjusted on the basis of the volume and geometry of each chamber load to achieve a uniform and effective deposition.