AOI inspection for coating

AOI (Automated Optical Inspection) for coating is an advanced inspection method used to automatically check the quality, coverage, and consistency of Revestimento conformacional on PCBs. It is widely used in modern Montagem de PCB e Montagem SMT lines to ensure high accuracy, repeatability, and efficiency in quality control.

How AOI inspection works

In coating inspection, AOI systems use high-resolution cameras, lighting (often including UV light), and image-processing software to analyze the PCB surface. The system compares captured images with predefined standards or CAD data to determine whether the Revestimento conformacional has been applied correctly.

In many Montagem de PCB pronta para uso processes, AOI is integrated inline, allowing real-time inspection immediately after coating.

What AOI checks in conformal coating

AOI inspection can detect a wide range of coating-related issues:

• Missing coating areas (insufficient coverage)
• Excess coating (over-application on connectors or pads)
• Uneven distribution
• Shadowing under components
• Bubbles, voids, or contamination
• Incorrect coating boundaries

This makes AOI especially valuable in high-density Montagem SMT, where manual inspection may not be sufficient.

Advantages of AOI inspection

• High accuracy and consistency → eliminates human error
• Fast inspection speed → suitable for high-volume production
• Automated process → reduces labor costs
• Data recording and traceability → useful for quality tracking
• Inline integration → immediate feedback for process control

In large-scale Montagem de PCB, AOI significantly improves defect detection and overall yield.

AOI vs UV inspection

• UV inspection
  • Simple and low cost
  • Relies on human visual checking
  • Good for basic coverage verification
• Inspeção AOI
  • Fully automated and more precise
  • Can quantify defects and compare against standards
  • Better for complex and high-reliability applications

In many Montagem de PCB pronta para uso lines, both methods are used together for optimal results.

Limitations of AOI inspection

• Higher equipment cost
• Requires programming and setup for each PCB design
• May struggle with very complex 3D geometries or hidden areas

Despite these limitations, AOI remains one of the most effective inspection tools in advanced Montagem SMT.

Conclusão

AOI inspection for coating is a powerful automated solution for ensuring proper Revestimento conformacional application. By detecting defects quickly and accurately, it enhances quality control in Montagem de PCB, Montagem SMT, e Montagem de PCB pronta para uso, helping manufacturers deliver reliable and consistent electronic products.

Obter uma cotação de revestimento isolante

Está planejando um novo projeto de PCBA com requisitos de revestimento? Solicite uma cotação rápida abaixo.
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.

Nome *

E-mail *

Preferred upload WhatsAPP

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

"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.

Enviar

Shenzhen Tengxinjie Electronics Co., Ltd.