Patent ID: 7067329

Claim:
A method of forming a ferroelectric memory device comprising: forming an insulating layer on a substrate; forming a sacrificial layer on the first insulating layer so that the insulating layer is between the sacrificial layer and the substrate; after forming the insulating layer and the sacrificial layer, forming a contact hole extending through the sacrificial layer and the insulating layer; after forming the contact hole, forming a conductive contact plug in the contact hole; after forming the conductive contact plug in the contact hole, removing the sacrificial layer so that the conductive contact plug extends beyond the insulating layer, and so that sidewalls of the conductive contact plug extending beyond the insulating layer are exposed; forming a first electrode on exposed portions of the conductive contact plug; forming a ferroelectric layer on the first electrode; and forming a second electrode on the ferroelectric layer such that the ferroelectric layer is between the first and second electrodes.