In electronics and advanced manufacturing, protecting sensitive components from moisture, chemicals, and environmental stress is critical. Conformal coatings play a vital role in ensuring long-term reliability, but not all coatings perform in the same way. Among available technologies, Parylene stands out as a unique and highly effective solution.

What Is Parylene?

Parylene is a family of thin, transparent polymer coatings applied using a chemical vapour deposition (CVD) process. Unlike liquid conformal coatings that are sprayed, brushed, or dipped, Parylene is deposited as a vapour inside a vacuum chamber. This enables it to coat all exposed surfaces — internal and external — with a uniform, pinhole-free film.

The most common Parylene variants include:

• Parylene N – Excellent dielectric properties, often used in high-frequency applications.
• Parylene C – The most widely used type, offering strong moisture and chemical resistance.
• Parylene F (AF-4) – Enhanced high-temperature and chemical resistance.

How Parylene Differs From Other Conformal Coatings

1. Application method – Vapour deposition in a vacuum environment ensures even coverage without pooling, meniscus effects, or edge build-up.
2. Coverage – Parylene penetrates tight gaps, coats under components, and reaches complex geometries that liquid coatings cannot.
3. Film properties – Ultra-thin (typically 1–50 µm), transparent, flexible, and biocompatible.
4. Performance – Superior resistance to moisture, chemicals, and many extreme environments.
5. Cleanliness – A dry, solvent-free process that leaves no residues, making it ideal for medical, aerospace, and high-reliability electronics.

Where Is Parylene Used?

• Medical devices – Catheters, stents, pacemakers, sensors, and implantable electronics.
• Aerospace and defence – Flight electronics, sensors, and mission-critical systems.
• Automotive – EV electronics, sensors, and 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 complete Parylene offering that supports both outsourced coating and in-house capability.

• Subcontract coating services – ISO-controlled, production-ready Parylene coating.
• Turnkey Parylene systems – Complete equipment, dimers, training, and long-term technical support.
• Reliable materials supply – Official European distribution supporting quality and continuity.

Whether you need immediate coating capacity or a fully validated in-house process, SCH provides the knowledge, equipment, and materials to ensure long-term success.

If you would like to discuss whether Parylene is the right solution for your application, get in touch with SCH.  To explore SCH’s complete Parylene capability, including services, equipment, dimers, and technical support, visit our Parylene solutions page.