1. Lublin University of Technology, Institute of Electronics and Information Technology, Nadbystrzycka 38A, 20-618 Lublin, Poland
2. Institute of Electron Technology, Cracow Division, Zabłocie 39, 30-701 Kraków, Poland
3. University of Silesia, Department of Materials Science, Śnieżna 2, 41-200 Sosnowiec, Poland