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← ScienceWhich outcome occurs when a pulsed laser ablates polymethylmethacrylate (PMMA) in photolithography?
A)Material undergoes chain scission.✓
B)Thermal conductivity increases rapidly.
C)Crystallinity decreases significantly
D)Viscosity increases exponentially.
💡 Explanation
Laser ablation of PMMA causes chain scission because high-energy photons break polymer bonds directly, therefore material removal occurs with minimal thermal effects, rather than changing bulk thermal conductivity or viscosity.
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