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← ScienceWhich problem arises due to lack of coherence during pulsed-laser deposition?
A)Non-uniform thin film deposition✓
B)Increased substrate thermal conductivity
C)Elevated ambient chamber pressure
D)Reduced precursor material decomposition
💡 Explanation
Non-uniform deposition happens because spatial coherence affects the even energy distribution within the laser spot during ablation. This uneven energy distribution causes particles to be ejected inconsistently, therefore certain surface zones accumulate more material, rather than homogenous layers.
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