Abstract: A semiconductor device for use in a memory cell includes an active matrix an active matrix provided with a semiconductor substrate, a plurality of transistors formed on the semiconductor substrate and conductive plugs electrically connected to the transistors, a number of lower electrodes formed on top of the conductive plugs, Ta2O5 films formed on the lower electrodes, composite films formed on the Ta2O5 films and upper electrodes formed on the composite films.

Abstract: A semiconductor device for use in a memory cell includes an active matrix an active matrix provided with a semiconductor substrate, a plurality of transistors formed on the semiconductor substrate and conductive plugs electrically connected to the transistors, a number of lower electrodes formed on top of the conductive plugs, Ta2O5 films formed on the lower electrodes, composite films formed on the Ta2O5 films and upper electrodes formed on the composite films.

Abstract: A method for manufacturing a zirconium oxide film for use in a semiconductor device by using an atomic layer deposition (ALD) which begins with setting a wafer in a reaction chamber. Thereafter, a zirconium source material of Zr(OC(CH3)3)4 (zirconium tetra—tert—butoxide) is supplied into the reaction chamber and then, an unreacted Zr(OC(CH3)3)4 is removed by a N2 purge or a vacuum purge. Subsequently, an oxygen source material is supplied into the reaction chamber, wherein the oxygen source material is selected from the group consisting of vaporized water (H2O), O2 gas, N2O gas and O3 gas. Finally, an unreacted oxygen source material is purged out from the reaction chamber.