Parylene Coating Hub

This Parylene Coating Hub brings together essential guides on Parylene dimer types, deposition processes, masking approaches, thickness measurement, and comparisons with liquid conformal coatings. By exploring these sections step by step, engineers can better understand, select, and optimise Parylene for high-reliability electronics.

In addition, we link to trusted standards so you can align your process with recognised industry guidance.

External resources: See IPC Standards and UL 746E.

Parylene Basics: Dimer Grades, Properties & Uses

Parylene comes in multiple dimer grades (C, N, D, F). Each grade has unique properties that influence dielectric strength, barrier protection, and cost. For example, Parylene C balances performance with affordability, while Parylene N provides excellent penetration into tight geometries. Therefore, selecting the right dimer ensures both performance and value.

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Parylene Deposition: Process Parameters

Parylene deposits through a vapour deposition process under vacuum. Key parameters such as temperature, chamber pressure, and dimer feed rate directly control coating uniformity. In addition, consistent control helps prevent defects and ensures repeatable results across batches.

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Masking Options

Parylene coats in the vapour phase, so masking requires complete sealing. Engineers often use boots, tapes, dots, or custom shields to protect connectors and no-coat regions. As a result, successful masking prevents costly rework and maintains reliability.

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Optical Thickness Measurement

Thickness measurement plays a crucial role in quality assurance. Non-contact optical methods provide high accuracy and traceable results, unlike mechanical gauges that can damage the surface. Consequently, optical tools help manufacturers meet customer specifications with confidence.

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Parylene vs Liquid Coatings: Selection Guide

Parylene delivers pinhole-free 3D coverage and excellent dielectric strength. In contrast, liquid coatings provide easier rework and lower initial cost. Ultimately, the decision depends on environmental demands, reliability goals, and long-term performance requirements.

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Explore Topic Hubs

Conformal Coating Processes Hub
Explore core conformal coating processes—spray, dip, selective robotic, and Parylene. Compare strengths, limits, and selection tips to match volume, cost, and reliability.

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Equipment & Application Methods Hub
Configure application equipment—spray guns & booths, dip systems, and selective valves/robots. Standardise recipes and fixtures to stabilise throughput and yield.

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Masking Hub
Master masking strategies for keep-outs: dots & tapes, reusable boots, custom shapes, and latex sealing. Apply barrier vs shielding correctly for spray, dip, and Parylene.

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Inspection & Quality Hub
Build a robust inspection & quality plan: UV coverage checks, thickness verification (AQL, coupons, SPC), adhesion tests, and documentation aligned to IPC/UL.

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Removal & Rework Hub
Choose the right removal & rework method: wet stripping for liquid coatings, precision micro-abrasion for Parylene, and controlled repair workflows that protect pads & leads.

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Parylene Coating Hub
Dive into Parylene coating: dimer grades, deposition parameters, vapour-phase masking, and optical thickness control. See when Parylene outperforms liquid coatings.

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Defects & Failure Mechanisms Hub
Prevent common coating defects—pinholes, dewetting, orange peel, cracking, delamination, corrosion/ionic contamination, and wicking—with root-cause fixes.

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Why Choose SCH Services?

Partnering with SCH Services means more than just outsourcing — you gain a complete, integrated platform for
Conformal Coating, Parylene & ProShieldESD Solutions, alongside equipment, materials, and training, all backed by decades of hands-on expertise.

  • ✈️ 25+ Years of Expertise – Specialists in coating technologies trusted worldwide.
  • 🛠️ End-to-End Support – Guidance on coating selection, Parylene grades, masking, inspection, and ProShieldESD integration.
  • 📈 Scalable Solutions – From prototype batches to high-volume production, SCH grows with your needs.
  • 🌍 Global Reach – Responsive support across Europe, North America, and Asia.
  • ✅ Proven Reliability – Built on quality, consistency, and customer satisfaction.

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