Abstract
A thin layer of SU-8 submicron pattern produced by holographic lithography is used as the dry etch mask in a chemically assisted ion beam etching (CAIBE) system. The effect of the chlorine gas flow rate on etched sidewalls is investigated; by matching the lateral etch rate and the deposition rate, etching selectivity of up to 7:1 is achieved, rendering smooth vertical sidewalls and damage-free upper portions for the etched structure.
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