Sulfur Can Corrode a Chip Resistor Open at Its Termination Edge

What the evidence preview establishes

Sulfur attacked the silver thick-film conductor where the termination barrier met the resistor cover glass. Silver sulfide replaced the conductor, disrupted adhesion, lifted the termination locally, and opened all three resistors.

Why this case matters

For an open chip resistor in a sulfur-bearing environment, section the termination edge and analyze the buried conductor. The most vulnerable path may be the narrow interface between the termination barrier and cover glass, even when exterior corrosion looks subtle.