Method of fabrication of an FeRAM capacitor and an FeRAM capacitor formed by the method

A method of forming a ferrocapacitor device as part of a FeRAM device fabrication process, said method comprising:

• forming barrier elements over and in direct contact with a plug that is located within and extends into a substructure, at least one of the barrier elements being formed of Ir or IrO2, the barrier elements being in electrical contact with the plug;
• forming a support layer that surrounds the sides of the barrier elements, the support layer including HCD nitride to be resistant to diffusion of oxygen and resistant to diffusion of at least one of Ir and IrO2;
• and
• forming a ferrocapacitor over the barrier elements and over an adjoining portion of the support layer, the ferrocapacitor device including a bottom electrode element, at least one ferroelectric element formed over the bottom electrode element, and at least one top electrode element formed over the ferroelectric element.