Atomic layer etching of 3D structures in silicon: Self-limiting and nonideal reactions
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In the Si{sub 3}N{sub 4} layer, coaxial and single submicrometer GaN structures of hexagonal shape with pyramidal facets are formed by selective vapor-phase epitaxy in windows produced with a focused ion beam. It is found that coaxial hexagonal structures are formed during the growth process in ring-shaped mask windows.
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