Etching Behavior of PbTe and Pb_(1-x)Sn_xTe Crystal Surfaces in Aqueous H_2O_2-HBr-Tartaric Acid Solutions

摘要

The chemical polishing of the surface of single crystals of PbTe and Pb_(1-x)Sn_xTe solid solutions by H_2O_2-HBr-tartaric acid bromine-releasing etchants has been studied for the first time under reproducible hydrodynamic conditions. The dissolution rate of the crystals has been determined as a function of etchant composition, solution stirring rate, and temperature. The polished surfaces have been examined by micro-structural analysis and electron microscopy. We have located the composition boundaries of solutions for the dynamic chemical polishing of the semiconductor materials studied.