Process for preparing thin films of potassium niobate, potassium tantalate, and mixed crystals thereof

摘要

Epitaxial layers of KNbO3, KTaO3 or mixed crystals thereof can be deposited on suitable substrates from a melt solution of these substances in potassium metavanadate. The physical properties of the thin films can in the process be largely influenced by the choice of the chemical composition of the solution and the deposition temperature. The relatively simple technology of liquid-phase epitaxy of these substances in particular provides for the preparation of wave-guiding thin films for the active components of integrated optics.