Selective spraying is one of the most efficient conformal coating techniques. It involves the use of a robotic program that accurately targets circuit board areas that needs to be coated. It also avoids the components that don’t need coating.
A wide range of specialist spray guns are used to achieve this kind of efficiency and selectivity. It creates a precise spray pattern during the conformal coating process.
- Selective spraying can be used for all conformal coatings.
- A specialized robotic machine is required for the application of selective coating.
- The initial investment is high but the ROI is good as it can handle high volume of coating.
- Operating the robotic system requires extensive skill and training.
- It eliminates the need for masking since the spraying is targeted.
- It is a medium to high volume process.
Variables to consider in selective spraying conformal coating:
- The operator’s skill and extensive training
- Quality of selective spray robotic equipment
- Compatibility of valve technologies
- Perfect blending of conformal coating with the right viscosity
- Compatibility of circuit board design
- Temperature and humidity in the location of the robotic equipment
There are advantages and disadvantages to using selective spraying. Some of the benefits include the elimination of masking, high speed coating, and high volume processing. The downside of this technique is that it requires huge capital cost and high level of skill and expertise to operate.
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.