Ms Miriam Krettová, a PhD student at the IEE SAS has presented our latest results achieved in the epitaxial growth of gallium oxide in Brno during the OPERA COST Action event ‘Training School Applications and Characterization of Epitaxial Materials (https://cost-opera.eu/events/opera-cost-action-training-school-hybrid-event/)’. She also took part in training in fabrication and characterization techniques used in the semiconductor technology.