Conformal coatings can be applied to printed circuit boards (PCBs) in the production process environment in many different ways.
Listed below are the common methods of applying conformal coating materials:
Click on each to review each conformal coating application technique in our free ebook online.
The holistic approach to conformal coating application methods
It is possible to split the different application methods and their suitability in many different ways including:
- Compatibility with the conformal coating material
- Design of the circuit board
- Suitability to low, medium and high volume
- Manual versus automatic process
- Type of method of application
- Level of control required
Each of the various coating methods has different advantages and disadvantages.
This relates to the holistic approach to conformal coating processing. It states that you should consider the conformal coating material itself, the application process and the circuit board together and not as three separate entities.
However, when considering the application methods it is possible to make some assumptions that help in selection.
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If you are new to Nexus and our work on conformal coatings then a good place to go is our Start Here page or our free conformal coating eBook.
This is a question I am asked time and again.
Of course most people know of the selective robot and how it applies conformal coating.
However, there are many different application methods available for both liquid conformal coatings and Parylene and listed below are the common techniques:
Click on each to examine individually for details or click conformal coating application techniques for an overview.
Note, each of the various methods has different strengths and weaknesses.
However, each of these application methods should be considered in relation to the holistic approach to conformal coating processing
What is the holistic approach to conformal coating?
The holistic approach states that you should consider the conformal coating material, the application process and the circuit board together and not as three separate entities.
I consider this approach the most fundamental issue and crucial factor in all of conformal coating processing.
Ironically, it is ignored on a regular basis.
In fact, I find that the failure to apply the holistic approach at the beginning of the conformal coating selection process is normally the root cause of many conformal coating problems.
Click conformal coating application techniques to find out more.
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Dr Lee Hitchens is the Author of the Nexus eBook and a main contributor to Nexus.