Expert Conformal Coating Services for PCB Protection

The best PCB coating depends on the operating environment, geometry, and reliability requirements. For high-moisture, immersion, medical, or mission-critical applications, Parylene is often preferred because it forms an ultra-thin, uniform barrier with strong waterproofing, chemical resistance, and biocompatibility. FX PCB also provides conformal coating options to protect assemblies from corrosion, humidity, salt fog, and environmental stress.

Conformal coating protects PCB assemblies from moisture, corrosion, dust, chemicals, salt fog, and surface contamination that can cause leakage currents, shorts, or premature failures. It is especially useful for electronics used in automotive, industrial, medical, telecommunications, and outdoor applications. FX PCB’s coating services are designed to improve reliability while maintaining the electrical performance of the assembled board.

FX PCB’s Parylene nano-vacuum coating can be controlled at approximately 5–30um, making it extremely thin compared with many traditional protective coatings. This helps protect complex assemblies without significantly changing product size, connector fit, or mechanical clearances. The coating is also highly uniform, which makes it effective for detailed component shapes and hard-to-reach surfaces.

Conformal coating can greatly improve moisture resistance, but waterproof performance depends on the coating material, thickness, coverage, assembly design, and exposure conditions. FX PCB offers specialized waterproof PCBA solutions, including Parylene coating, designed for IPX-8 protection and long soaking or diving exposure. Proper design review, masking, coating, and validation are all important for reliable waterproof performance.

Yes, PCB coating is commonly used in medical, aerospace, defense, and other high-reliability electronics where failure risks must be minimized. FX PCB’s Parylene coating offers biocompatibility, moisture protection, chemical resistance, and very low gas release, making it suitable for demanding commercial and military applications. The company also supports ISO13485 and IPC-A-610 Class 2/3 quality expectations.

Parylene coating is especially useful when dimensional impact must be minimized because it can be applied in an ultra-thin 5–30um controlled layer. It also provides high transparency with optical quality, making it suitable for applications where visibility or optical performance matters. Masking and process review are still important to protect connectors, test points, contacts, and other no-coat areas.

FX PCB supports coating quality through controlled manufacturing processes, experienced PCBA workmanship, inspection, and testing capabilities. Depending on project needs, assemblies can be supported by AOI, X-ray inspection, electrical testing, functional testing, and custom test fixtures. The company follows IPC-A-610 Class 2/3 standards and operates ISO9001, ISO14001, and ISO13485 certified facilities.

To request a quote, provide Gerber files, BOM, assembly drawings, coating requirements, expected quantities, environmental exposure details, and any masking or test requirements. FX PCB can review your design, suggest manufacturability considerations, source components, assemble the boards, apply coating, and support testing. Clear upfront information helps improve pricing accuracy, turnaround planning, and coating reliability.