Patent ID: 6956279

Claim:
A semiconductor device, comprising: an interlayer dielectric formed on a substrate and including a contact plug; a conductive wetting layer formed in contact with the contact plug; a multi-layer oxygen barrier pattern formed in contact with the conductive wetting layer, the multi-layer oxygen barrier consisting of a first barrier metal layer composed of a precious metal, a material layer formed by stacking a single element layer onto the first barrier metal layer, and a second barrier metal layer composed of another precious metal, wherein the material layer is capable of combining with oxygen that penetrates the first metal layer to form a conductive solid solution, and wherein the material layer is positioned between and is in contact with the first and the second barrier metal layers; an IrO 2 layer in contact with the multi-layer oxygen barrier pattern; a bottom electrode for a capacitor, the bottom electrode electrically connected to the multi-layer oxygen barrier pattern; and a ferroelectric film formed in contact with the bottom electrode.