Parylene are polymers which form extremely inert a stable thin film coatings to protect high sensitve substrates. The popular designation parylene is a short cut instead of the correct chemical designation Poly-para-Xylylene.
Superior characteristics of parylene thin films:
- Almost completely resistant against any acid or solvent
- Layers of a few µm thickness are completely closed and inpermeable for liquids and gases.
- Very resistant against any kind of aging
- Parylene coatings are characterized by extremely uniform thickness independent from the conture. Uniform film thickness follows edges and grooves.
Due to this outstanding performance parylene are favorite coating materials for electronic devices.