Conformal coating- Frequently Asked Questions
Conformal coating-
Frequently Asked Questions
Q1. How much can masking and rework add to conformal coating cost?
Often 20–40% of total process cost, depending on design, chemistry, and application method.
Q2. How do we avoid masking in our electronics coating process?
Use coatings formulated for selective application with controlled overspray and minimal creep, and pair them with tuned spray paths and fixturing.
Q3. How do we avoid overspray or splatter of conformal coatings during application?
Match coating chemistry to the valve type and program for narrow spray boundaries; validate atomization, edge quality, and droplet control.
Q4. How can we apply conformal coating only to part of a PCB?
Selective coating with programmed keep-out zones and appropriate valves (spray, film, or needle) targets only required areas.
Q5. What is selective coating?
A controlled, automated process that deposits conformal coating only where specified using programmed paths and valves.
Q6. What’s the difference between overspray and creep?
Overspray is unintended deposition outside the target area; creep is wetting/flow into keepout zones after deposition.
Q7. What is sharp-edge coverage in conformal coating?
The ability of a coating to form clean, well-defined edges on components and board features, minimizing overspray and creep into keep-out zones.
Q8. Do coatings exist that reduce masking needs?
Yes. Materials engineered for automation can limit overspray, spatter, and creep—reducing masking and rework.
Q9. What do people mean by “lacquer” on PCBs?
It’s a common informal term for conformal coatings used for electronics protection.
