Thin HTSC films produced by a polymer metal precursor technique

In precursors the metal ions are combined with acid groups of polymethacryl ic acid (PMAA), polyacrylic acid (PAA) or novolac. Compared to thermal degr adation temperatures of pure polymers those of precursors are low. Precurso r films were patterned by UV lithography. Diffractometric investigations sh owed that the c-axis oriented epitaxial films of YBa2Cu3Ox and Bi2Sr2CaCu2O x originated from amorphous metal oxide films, which were received after th ermal degradation of the precursor. Transition temperatures and current den sities were determined by electric resistivity measurements.