PCB before applying HumiSeal

Proper PCB preparation is the most critical step before applying HumiSeal conformal coating, produced by Chase Corporation. Em Montagem de PCB, Montagem SMT, e Montagem de PCB pronta para uso, poor preparation is the leading cause of coating failure such as delamination, bubbles, or corrosion.

Remove all contaminants

After soldering, PCBs often have residues that must be eliminated:

• Flux residues (especially no-clean flux)
• Oils from handling
• Dust and particles
• Ionic contamination

Cleaning methods:

• Solvent cleaning (IPA or dedicated cleaners)
• Ultrasonic cleaning for complex assemblies
• Deionized (DI) water cleaning systems

A clean surface ensures proper adhesion of Revestimento conformacional.

Dry the PCB completely

Moisture trapped on the board can cause serious issues:

• Poor coating adhesion
• Blistering or bubbles
• Corrosão sob o revestimento

Best practices:

• Air dry or use compressed air
• Bake PCB at 50–80°C for 30–60 minutes if needed
• Ensure no moisture remains under components

Inspect before coating

Before coating, perform a visual and quality inspection:

• Check for solder defects (bridges, cold joints)
• Ensure no residues remain
• Verify components are properly mounted

Fixing issues after coating is much more difficult in Montagem SMT.

Mask critical areas

Certain areas must not be coated:

• Connectors and edge contacts
• Test points
• Switches and mechanical interfaces

Use masking tape, boots, or removable latex to protect these zones during Montagem de PCB.

Surface activation (optional but recommended)

For high-reliability applications:

• Use plasma cleaning to improve surface energy
• Enhances coating adhesion
• Common in aerospace and automotive Montagem de PCB pronta para uso

Control handling and environment

• Wear gloves to avoid fingerprints
• Work in a clean, dust-free environment
• Maintain controlled humidity and temperature

Contamination during handling can compromise coating quality.

Final readiness checklist

Before applying HumiSeal:

• PCB is clean and contamination-free
• Fully dry with no trapped moisture
• Masking is correctly applied
• Inspection is completed
• Environment is controlled

Conclusão

Preparing the PCB properly is essential for successful HumiSeal coating. In Montagem de PCB, Montagem SMT, e Montagem de PCB pronta para uso, thorough cleaning, drying, inspection, and masking ensure strong adhesion, reliable protection, and long-term performance.

We support HumiSeal and equivalent conformal coating solutions for your PCBA projects.

Obter uma cotação de revestimento isolante

Tem dúvidas sobre o revestimento isolante para sua placa de circuito impresso? Nossos engenheiros estão prontos para ajudar.
Envie-nos seus requisitos e receba uma resposta rápida de nossa equipe de engenharia.

Resposta 24 horas ✔ Suporte de engenharia ✔ Produção pequena e em massa

Ative o JavaScript em seu navegador para preencher este formulário.

Carregar arquivo de e-mail

Nome *

E-mail *

WhatsAPP

Material preferido

• Acrílico (AR)
• Silicone (SR)
• Poliuretano (UR)
• Curável por UV - UV
• Não tenho certeza / Preciso de orientação

Upload de arquivos

Arrastar e soltar arquivos,, Escolha os arquivos para upload Você pode carregar até 8 arquivos.

Para um processamento mais rápido, compacte todos os arquivos Gerber, arquivos Drill e BOM em um único arquivo .ZIP ou .RAR.

Mensagem

"Liste os componentes ou áreas que NÃO devem ser revestidos (por exemplo, conectores, pontos de teste)." Se você tiver requisitos específicos de material de revestimento (por exemplo, HumiSeal), indique isso na caixa de comentários.

Enviar

Shenzhen Tengxinjie Electronics Co., Ltd.