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For surface acoustic wave (SAW) devices, which outcome limits minimum feature size?

A)Rayleigh wavelength spatial function blurring
B)Electrical impedance parasitic capacitance loading
C)Material acoustic impedance mismatch reflection
D)Transducer finger electromigration failure cascade

💡 Explanation

Blurring limits feature size in SAW devices because the *Rayleigh wavelength* dictates resolution. The spatial function representing the wave broadens due to diffraction, therefore definition worsens, rather than parasitic capacitance or electromigration, which impact performance given fabrication limits.

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