Troubleshooting Conformal Coating Problems

3D effects shadowing reduced sizeConformal coating problems often fall into two categories—the conformal coating process and the reliability of the circuit board coated.

We have discussed in our previous blog the importance of having a holistic approach when choosing a conformal coating method.

Overlooking certain factors like the circuit board material, machine type and others can affect the quality of your coating.

What are the failure mechanisms in conformal coating?

Circuit board failures caused by conformal coating may be attributed to the method selected and the actual process or how it was executed.

Here are the common failure mechanisms in conformal coating:

  1. Blistering
  2. Blushing
  3. Bubbles, Pinholes and Foam
  4. Capillary
  5. Contamination of Coating
  6. Corrosion
  7. Cracking
  8. De-wetting
  9. Delamination
  10. Discolouration
  11. Fish Eyes
  12. Layering
  13. Mealing
  14. Orange Peel
  15. Shadowing
  16. Uneven Coating

Each failure mechanism needs to be examined individually. You need to know when they occur and what could be done to prevent them from happening.

Read more at Conformal Coating Troubleshooting: Overview.

Who is Nexus?

Nexus brings together the accumulated knowledge of a group of conformal coating and electronics material dispensing consultants who provide a unique service, focused on helping electronics manufacturing clients improve their conformal coating and electronics materials processes.

Nexus operate across North America, Europe and Asia and can provide a unique perspective to the rapidly growing conformal coating and electronics materials industry. Expertise is held in liquid and parylene coating, capital equipment sales and specifications and material, equipment and process specification, troubleshooting and training.

 

 

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Author: nexus3c

A global resource for the Conformal Coating industry providing information, solutions, connections and advice on all areas of Conformal Coating including Conformal Coating Service, Equipment, Materials, Training, Documentation and Consultancy.

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