Conformal Coating Inspection & Quality Hub

This conformal coating inspection hub groups our technical resources on PCB coating inspection and quality assurance. It covers standards alignment, UV inspection for coverage and edge definition, and thickness verification using coupons, AQL, and SPC methods.

External resources: See IPC-CC-830, UL 746E, and NASA Workmanship Guidelines.

Conformal Coating Inspection: Standards & Methods

Inspection ensures conformal coating meets IPC, UL, and customer requirements. Methods include visual checks under UV and white light, adhesion testing, and thickness measurement for compliance.

  • IPC-A-610 for workmanship standards.
  • UL 746E for dielectric properties.
  • Adhesion via tape pull or cross-hatch tests.

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UV (UVA) Inspection: Coverage & Edge Definition

UV inspection highlights coating presence and edge quality. It is critical for verifying keep-out zones and identifying thin or missing coverage.

  • Detects overspray, voids, or bridging.
  • Confirms edge definition and masking performance.
  • Uses UVA lamps or enclosed UV inspection booths.

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Thickness Verification Plans (AQL, Coupons, SPC)

Thickness checks ensure the coating meets electrical clearance and environmental protection requirements. Plans typically use coupons and statistical sampling aligned with AQL.

  • Dry film gauges and optical monitors for accuracy.
  • Use of witness coupons alongside production boards.
  • SPC charts to monitor consistency and identify drift.

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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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Conformal Coating Design Hub
Learn design-for-coating (DfCC / DFM) principles—keep-out zones, component layout, creepage & clearance, masking access, drainage control, and coating thickness planning to eliminate rework and defects before manufacture.

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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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Need Process Support?

Optimising electronics coating methods requires the right combination of materials, equipment, and operator training. Partner with SCH Services for:

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 – Selection of chemistry/process, masking strategies, inspection, and ProShieldESD integration.
  • 📈 Scalable Solutions – From prototypes to high-volume production.
  • 🌍 Global Reach – Responsive support across Europe, North America, and Asia.
  • ✅ Proven Reliability – Consistent results across services, equipment, and materials.

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