Sometimes problems with conformal coating are too complicated or difficult to repair. This can occur when bubbles develop in the coating during the application process; bubbles cause voids in the coating that defeat its protective, insulating purpose, suggesting the need for removal. Other situations that lead to inadequate coverage, and may favor coating removal, rather […]
Defects to either the PCB assembly or its conformal coating can be sufficient to cause coating removal. Whether repair technologies address the circuit board’s components or the conformal film, subsequent post-repair coating (recoating) processes need to address:
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Conformally coated PCBs are expected to work without fail, largely because of the protection the coatings provide them. In addition to PCB-manufacturing issues, coating problems can trigger failure mechanisms for the assembly. For instance, Conformal coating applied incorrectly can cause PCB malfunction. Selecting the wrong coating material from among acrylic, epoxy, parylene, silicone or uret
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