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Which risk increases significantly when imperfections disrupt the coherence of a laser used in photolithography?

A)Increased minimum feature size printed
B)Reduced depth of field achievable
C)Elevated substrate thermal damage
D)Decreased photoresist adhesion strength

💡 Explanation

Increased minimum feature size arises because diminished laser coherence reduces constructive and destructive interference, degrading the projected image's sharpness. Therefore, the pattern fidelity declines, rather than improved depth of field, because image resolution is compromised.

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