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Which process limits minimum feature size achievable in electron beam lithography?

A)Secondary electron scattering (proximity effect)
B)Chromatic aberration in focusing lenses
C)Resist thickness dependent development rate
D)Vibration from mechanical stages

💡 Explanation

When the primary electron beam strikes the resist, secondary electrons are generated which scatter into surrounding areas because of inelastic collosions, exposing resist where it isn't intended which blurring the final pattern. Therefore secondary electron scattering limits the minimum feature size, rather than lens aberration or resist properties, which are independently controlled.

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