Patent ID: 6429088
Filing Date: 2002-08-06
Classification: H01L

Abstract:
A method of fabricating a metal-oxide-metal (MOM) capacitor, comprising the steps of:depositing a bottom metal layer; depositing a high dielectric constant oxide insulator layer over said bottom metal layer; said high dielectric constant oxide insulator layer having one or more pin hole defects; wherein said high dielectric constant oxide insulator layer is comprised of a material selected from the group comprising Ta2O5, SrTiO3, BaTiO3, SrTiO3, (Ba, Sr)TiO3, Pb(Zr, Ti)O3, SrBi2Ta2O9(SBT), (Pb, La)(Zr, Ti)O3, and Bi4Ti3O12; annealing said structure in an oxidizing ambient to cause said exposed bottom metal to form a metal oxide partially filling said one or more pin hole defects to repair said pin hole defects; depositing an upper oxide conductor layer over said high dielectric constant oxide insulator layer; said upper oxide conductor layer is comprised of a material selected from the group comprising indium tin oxide (In2O3:Sn), tin oxide (SnO2), zinc oxide (ZnO), and ruthenium oxide (RuO2); and depositing an upper metal layer over said upper oxide conductor layer; said upper metal layer comprises an upper Al layer over an upper TiN layer, and said bottom metal layer comprises a lower barrier metal layer over a lower Al layer; wherein said bottom metal layer includes a lower barrier metal adjacent said high dielectric constant oxide insulator layer and said lower barrier metal layer being selected from the group comprising TiN and TiN/Ti layer.