Patent ID: 8257984

Claim:
A method of manufacturing a ferroelectric capacitor, comprising: forming an interlayer insulation layer on a substrate having a transistor and a bit line so that the transistor and the bit line are covered by the interlayer insulation layer; forming a contact hole in the interlayer insulation layer to partially expose the substrate; forming a conductive layer having a set thickness on the interlayer insulation layer, the conductive layer filling the contact hole; depositing an oxidation preventing layer on the conductive layer filling the contact hole and formed on the interlayer insulation layer, the oxidation preventing layer being formed to extend across the conductive layer beyond the contact hole such that at least a portion of the conductive layer on the interlayer insulation layer; depositing a lower electrode on an entire upper surface of the oxidation preventing layer, after depositing the oxidation preventing layer on the conductive layer; depositing a ferroelectric layer on the lower electrode, after depositing the lower electrode on the entire upper surface of the oxidation preventing layer; depositing an upper electrode on the ferroelectric layer; and heat treating the ferroelectric layer, after depositing the ferroelectric layer, wherein: the oxidation preventing layer is electrically conductive, the oxidation preventing layer includes a TiSiN layer, and the depositing of the oxidation preventing layer, the depositing of the lower electrode and the depositing of the ferroelectric layer are sequentially and consecutively performed.