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Wave Soldering Defects

Bulbous Joint / Excess Fillet on a Printed Circuit Board

A solder joint on chip components that is over the height of the part with a convex meniscus is referred to as bulbous or excess fillet. It is caused during separation of the board from the solder wave and is more common in nitrogen soldering.

Figure 1: Bulbous Joint
Figure 1: Bulbous Joint

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