Which mechanism alters the thermal conductivity constant governing heat dissipation in a silicon wafer during laser annealing?

💡 Explanation

Phonon scattering due to lattice defects reduces thermal conductivity; laser annealing creates these defects. This increased scattering lowers the thermal conductivity constant, because imperfections impede phonon propagation. Therefore, option A is right, rather than alternatives which enhance heat transfer rates under these conditions.

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