Localised etching of (100) GaAs via an AlAs sacrificial layer

Abstract

(100) GaAs substrate was patterned in 7H3PO4 (85% w/w):7H2O2 (30% w/w): IODI H2O via an etching mask with dynamic edges. The mask consisted of a resist layer, a Ti layer, a GaAs top layer, and an AlAs sacrificial layer. [0-11]-oriented stripe patterns were defined in the resist and Ti layers. At first, the top GaAs layer was etched via the resist /Ti mask… (More)

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