PROTECTING YOUR PCB
Advantage of using light-cure conformal coatings
1.Easy, Instant Application
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– No heat, mixing, surface preparation needed – Numerous manual and automated application methods available (i.e. spray, jet, dip, brush) |
2.Superior Protection
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– Excellent resistance against contaminants like salt, dust, moisture, and more – Coatings available with UL, IPC, & MIL certification |
3.Solvent-Free, 100% Solids
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– Provides a greener process – RoHS compliant |
4.On-Demand, Tack-Free Cures
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– Cures in seconds with UV light allowing immediate processing – Tack-free surface immediately after cure prevents possible damage from handling |
5.Secondary Cure Capability
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– Secondary curing mechanism ensures proper cure in shadow areas – Coatings with heat or moisture cure available |
6.Single Pass Coverage
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– Less materials used, reducing materials cost – No waiting for layers to dry for a quicker process |
7.Fluorescing for Easy Inspection
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– Coatings available that fluoresce blue or red under black light for easy inspection – Immediate inspection for a quicker process |
INVERTER PCB COATING APPLICATION
CUSTOMER APPLICATION: A global producer of inverters was looking to find an alternative to their solvent-based conformal coating process. They needed a new process that would be effective and efficient and could be used in multiple locations for 12 different types of inverter PCBs. The company’s ultimate goal was to find an alternative that could help them increase productivity within their existing manufacturing space to meet a 30% demand increase.
PROCESS COMPARISION
| Solvent-Based Conformal Coatings | Dymax Dual-Cure Conformal Coatings | |
| Immediate handling | Needs time for the solvent to evaporate | Tack-free immediately after UV light cure |
| Odor | Strong odor from solvents | Low odor for a safer working environment |
| Thickness to achieve throughput and cost targets | 25 um max, dry thickness, did not meet the existing electrical requirement | 50-200 um; met all requirements |
