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← ScienceWhich risk increases when etching nanoscale structures by electron beam?
A)Increased electron backscattering✓
B)Accelerated substrate oxidation
C)Reduced mask undercutting
D)Enhanced surface adhesion
💡 Explanation
Increased electron backscattering results because beam electrons scatter from substrate atoms. The mechanism, Rutherford scattering, means increased scattering at lower e-beam voltages. Therefore, resolution decreases, rather than improve, because more volume is affected by the electron beam.
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