In the world of electronics and advanced manufacturing, protecting sensitive components from moisture, chemicals, and environmental stress is critical. Conformal coatings play a vital role in ensuring reliability, but not all coatings are created equal. Among them, Parylene stands out as a unique and highly effective solution.
What Is Parylene?
Parylene is a family of thin, transparent polymer coatings applied through a chemical vapour deposition (CVD) process. Unlike liquid conformal coatings, which are sprayed, brushed, or dipped, Parylene is deposited as a vapour. This means it coats every surface — external and internal — with a uniform, pinhole-free layer.
The most common types of Parylene are:
– Parylene N: Excellent dielectric properties, used for high-frequency applications.
– Parylene C: The most widely used, with outstanding moisture and chemical resistance.
– Parylene F (AF-4): High-temperature and chemical resistance.
How Parylene Differs From Other Conformal Coatings
1. Application Method: Parylene is applied in a vacuum chamber as a vapour, ensuring complete and even coverage without pooling, meniscus effects, or edge build-up.
2. Coverage: Parylene can coat the inside of tight gaps, under components, and into complex geometries that liquid coatings cannot reach.
3. Film Properties: The coating is ultra-thin (typically 1–50 µm), transparent, flexible, and biocompatible.
4. Performance: Parylene offers superior resistance to moisture, chemicals, and extreme temperatures.
5. Cleanliness: As a dry, vapour-deposited coating, Parylene leaves no residues or solvents, making it ideal for sensitive applications such as medical implants and aerospace electronics.
Liquid vs Parylene Coating
Above: Comparison between traditional liquid conformal coating and Parylene vapour deposition.
Where Is Parylene Used?
– Medical devices: Catheters, stents, pacemakers, sensors.
– Aerospace and defence: Flight electronics, sensors, and high-reliability systems.
– Automotive: EV electronics, sensors, ADAS components.
– Consumer electronics: Wearables, IoT devices, and microelectronics.
Why Choose SCH for Parylene?
At SCH Services Ltd, we combine over 30 years of coating expertise with a unique offering:
– Subcontract coating services: ISO-certified, production-ready Parylene coating.
– Turnkey Parylene systems: Complete equipment, dimers, training, and long-term support.
– Official European distributor of KaryNano, ensuring reliable supply and quality.
Whether you need immediate coating capacity or a complete in-house solution, SCH provides the knowledge, equipment, and materials to ensure success.
👉 Get in touch today to learn how Parylene can protect your products and how SCH can support your coating requirements.
