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Which consequence results when thermal runaway occurs during solder reflow?

A)Insufficient wetting, creating brittle joints
B)Bridging between closely spaced pads
C)Delamination due to differential expansion
D)Oxidation of PCB copper trace surfaces

💡 Explanation

Differential expansion causes delamination because layers separate during thermal runaway; the excessive heat overwhelms temperature control. Therefore, delamination is the answer given excessive heat, rather than insufficient wetting due to inadequate heat or oxidation, which reduces solderability.

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