Test coating quality

Testing coating quality is a critical step in ensuring the reliability of Conforme coating in PCB-assemblage en SMT-assemblage. Proper inspection and testing help verify that the coating provides effective protection against moisture, dust, chemicals, and environmental stress.

Visual inspection

Visual inspection is the most basic and widely used method.

What to check:

• Uniform coating coverage
• Absence of bubbles, cracks, or pinholes
• No contamination or foreign particles
• Proper masking boundaries

Under normal or magnified light, inspectors can quickly identify obvious defects in Conforme coating.

UV inspection

Many Conforme coating materials contain UV tracers.

Process:

• Expose PCB to UV light
• Coating fluoresces, making coverage visible

Benefits:

• Detects missed areas or thin coating
• Improves inspection accuracy in SMT-assemblage

Thickness measurement

Coating thickness is essential for performance.

Methods:

• Wet film thickness gauge (before curing)
• Dry film thickness measurement (after curing)
• Micrometer or ultrasonic measurement

Proper thickness ensures optimal protection without affecting component function in PCB-assemblage.

Adhesion testing

Adhesion testing checks how well the coating bonds to the PCB.

Common methods:

• Cross-hatch (tape) test
• Scratch test

Good adhesion ensures long-term durability of Conforme coating.

Electrical testing

Electrical performance must not be compromised.

Tests include:

• Insulation resistance testing
• Dielectric withstand (Hi-Pot) testing

These confirm that the coating enhances insulation in SMT-assemblage.

Environmental and reliability testing

For high-reliability applications, environmental tests are required.

Examples:

• Temperature cycling
• Vochtigheid testen
• Salt spray (corrosion) testing

These tests simulate real-world conditions to validate Conforme coating performance.

Geautomatiseerde optische inspectie (AOI)

In geavanceerde PCB-assemblage, AOI systems are used to detect coating defects.

Advantages:

• High-speed inspection
• Consistent and repeatable results
• Suitable for mass production

Common coating defects detected

• Uneven thickness
• Bubbles and voids
• Delamination
• Incomplete coverage
• Contamination

Early detection prevents failures in final products.

Eindconclusie

Testing coating quality is essential in PCB-assemblage en SMT-assemblage to ensure the effectiveness of Conforme coating. By combining visual inspection, UV inspection, thickness measurement, adhesion testing, and environmental testing, manufacturers can guarantee high reliability and long-term protection of electronic devices.

Vraag een offerte aan voor conforme coating

Vraag vandaag nog deskundig advies en prijzen voor uw conformal coating-behoeften.
Stuur ons je vereisten en krijg snel antwoord van ons engineeringteam.

✔ 24-uurs respons ✔ Engineering-ondersteuning ✔ Kleine & massaproductie

Schakel JavaScript in uw browser in om dit formulier in te vullen.

Voorkeur Naam WhatsAPP

Naam *

E-mail *

WhatsAPP

Aanbevolen materiaal

• Acryl (AR)
• Silicone (SR)
• Polyurethaan (UR)
• UV-uithardbaar - UV
• Ik weet het niet zeker / Heb advies nodig

Bestanden uploaden

Bestanden slepen en neerzetten,, Bestanden kiezen om te uploaden U kunt maximaal 8 bestanden uploaden.

Comprimeer alle Gerber-bestanden, boorbestanden en BOM in een enkel .ZIP- of .RAR-bestand voor snellere verwerking.

Bericht

"Please list components or areas that must NOT be coated (e.g., connectors, test points)." If you have specific coating material requirements (e.g., HumiSeal), Please indicate this in the comment box.

Stuur in

Shenzhen Tengxinjie Electronics Co, Ltd.