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CONFORMAL COATINGS


WHAT IS A CONFORMAL COATING?

A conformal coating is a thin polymeric film that conforms to a printed circuit board's contours to protect its components. Conformal coatings protect electronic components from exposure to environmental factors. Examples of these factors include moisture, dust, chemicals, and temperature extremes.

HOW IS IT APPLIED?

Coatings can be applied in many ways, including brushing, spraying, dispensing, and dip coating.

Fluke Multimeter

WHAT ARE THE TYPES OF CONFORMAL COATINGS?

Several materials can use conformal coatings, such as acrylics, silicones, urethanes, UV curable, synthetic rubber, and water-based. Each has its characteristics, making them preferred for specific environments and manufacturing scenarios. It is important to choose a coating chemistry meeting the application needs.

ADVANTAGES
DISADVANTAGES
BRUSH ON
Low capital cost
Labor intensive
Inconsistent/poor quality
Slow/low volume
DIP COAT
Moderate/high volume
Fairly consistent coating
Limited coating choices due to pot life issues
Large masking requirement
HAND SPRAY
Low capital cost
Moderate volume
Light masking required
Operator dependent
SELECTIVE AUTOMATED SPRAY
Highest productivity/volume
Most consistent results
Minimizes masking
Efficient, only coat where needed
Capital cost