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
Conformal coatings are designed to protect printed circuit boards (PCBs), assuring they work under all operational circumstances. However, cases emerge where boards fail to function despite conformal coating protection. Such non-performance can be a consequence of:
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Not completely understood, electrically conductive tin whiskers are crystalline structures between 1-2 millimeters (mm) that can grow from surfaces where tin is used as a final finish; surfaces finished with electroplated tin are particularly susceptible to whisker growth. Although their occurrence was originally documented during the 1940s, no real solution has yet been devised to […]
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