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Which failure results when thermal expansion weakens connections between crystal substrates?

A)Intermetallic compound formation accelerates locally
B)Substrate doping concentration undergoes homogenization
C)Debye temperature increases significantly overall
D)Auger recombination dominates radiative emissions

💡 Explanation

Intermetallic compound (IMC) formation accelerates due to weakened bonds from thermal expansion because increased atomic mobility causes faster diffusion. Therefore, IMC growth leads to joint failure, rather than the modification substrate properties or thermal behaviors that occur under different equilibrium conditions.

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